Move classes related with "dubbo-monitor" from core repository to here

dubbo-admin/pom.xml

@@ -152,6 +152,7 @@
             <plugin>
                 <groupId>org.mortbay.jetty</groupId>
                 <artifactId>maven-jetty-plugin</artifactId>
+                <version>6.1.26</version>
                 <configuration>
                     <contextPath>/</contextPath>
                     <scanIntervalSeconds>10</scanIntervalSeconds>

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/JettyContainer.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple;
+
+import com.alibaba.dubbo.common.logger.Logger;
+import com.alibaba.dubbo.common.logger.LoggerFactory;
+import com.alibaba.dubbo.common.utils.ConfigUtils;
+import com.alibaba.dubbo.common.utils.NetUtils;
+import com.alibaba.dubbo.container.Container;
+
+import org.mortbay.jetty.Handler;
+import org.mortbay.jetty.Server;
+import org.mortbay.jetty.nio.SelectChannelConnector;
+import org.mortbay.jetty.servlet.FilterHolder;
+import org.mortbay.jetty.servlet.ServletHandler;
+import org.mortbay.jetty.servlet.ServletHolder;
+
+/**
+ * JettyContainer. (SPI, Singleton, ThreadSafe)
+ */
+public class JettyContainer implements Container {
+
+    public static final String JETTY_PORT = "dubbo.jetty.port";
+    public static final String JETTY_DIRECTORY = "dubbo.jetty.directory";
+    public static final String JETTY_PAGES = "dubbo.jetty.page";
+    public static final int DEFAULT_JETTY_PORT = 8080;
+    private static final Logger logger = LoggerFactory.getLogger(com.alibaba.dubbo.container.jetty.JettyContainer.class);
+    SelectChannelConnector connector;
+
+    public void start() {
+        String serverPort = ConfigUtils.getProperty(JETTY_PORT);
+        int port;
+        if (serverPort == null || serverPort.length() == 0) {
+            port = DEFAULT_JETTY_PORT;
+        } else {
+            port = Integer.parseInt(serverPort);
+        }
+        connector = new SelectChannelConnector();
+        connector.setPort(port);
+        ServletHandler handler = new ServletHandler();
+
+        String resources = ConfigUtils.getProperty(JETTY_DIRECTORY);
+        if (resources != null && resources.length() > 0) {
+            FilterHolder resourceHolder = handler.addFilterWithMapping(ResourceFilter.class, "/*", Handler.DEFAULT);
+            resourceHolder.setInitParameter("resources", resources);
+        }
+
+        ServletHolder pageHolder = handler.addServletWithMapping(PageServlet.class, "/*");
+        pageHolder.setInitParameter("pages", ConfigUtils.getProperty(JETTY_PAGES));
+        pageHolder.setInitOrder(2);
+
+        Server server = new Server();
+        server.addConnector(connector);
+        server.addHandler(handler);
+        try {
+            server.start();
+        } catch (Exception e) {
+            throw new IllegalStateException("Failed to start jetty server on " + NetUtils.getLocalHost() + ":" + port + ", cause: " + e.getMessage(), e);
+        }
+    }
+
+    public void stop() {
+        try {
+            if (connector != null) {
+                connector.close();
+                connector = null;
+            }
+        } catch (Throwable e) {
+            logger.error(e.getMessage(), e);
+        }
+    }
+
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/Menu.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Menu
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE})
+public @interface Menu {
+
+    String name();
+
+    String desc() default "";
+
+    int order() default 0;
+
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/MenuComparator.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple;
+
+import com.alibaba.dubbo.container.page.Menu;
+import com.alibaba.dubbo.container.page.PageHandler;
+
+import java.io.Serializable;
+import java.util.Comparator;
+
+/**
+ * MenuComparator
+ */
+public class MenuComparator implements Comparator<PageHandler>, Serializable {
+
+    private static final long serialVersionUID = -3161526932904414029L;
+
+    public int compare(PageHandler o1, PageHandler o2) {
+        if (o1 == null && o2 == null) {
+            return 0;
+        }
+        if (o1 == null) {
+            return -1;
+        }
+        if (o2 == null) {
+            return 1;
+        }
+        return o1.equals(o2) ? 0 : (o1.getClass().getAnnotation(Menu.class).order()
+                > o2.getClass().getAnnotation(Menu.class).order() ? 1 : -1);
+    }
+
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/Page.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Page
+ */
+public class Page {
+
+    private final String navigation;
+
+    private final String title;
+
+    private final List<String> columns;
+
+    private final List<List<String>> rows;
+
+    public Page(String navigation) {
+        this(navigation, (String) null, (String[]) null, (List<List<String>>) null);
+    }
+
+    public Page(String navigation, String title,
+                String column, String row) {
+        this(navigation, title, column == null ? null : Arrays.asList(new String[]{column}), row == null ? null : stringToList(row));
+    }
+
+    public Page(String navigation, String title,
+                String[] columns, List<List<String>> rows) {
+        this(navigation, title, columns == null ? null : Arrays.asList(columns), rows);
+    }
+
+    public Page(String navigation, String title,
+                List<String> columns, List<List<String>> rows) {
+        this.navigation = navigation;
+        this.title = title;
+        this.columns = columns;
+        this.rows = rows;
+    }
+
+    private static List<List<String>> stringToList(String str) {
+        List<List<String>> rows = new ArrayList<List<String>>();
+        List<String> row = new ArrayList<String>();
+        row.add(str);
+        rows.add(row);
+        return rows;
+    }
+
+    public String getNavigation() {
+        return navigation;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public List<String> getColumns() {
+        return columns;
+    }
+
+    public List<List<String>> getRows() {
+        return rows;
+    }
+
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/PageHandler.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple;
+
+import com.alibaba.dubbo.common.URL;
+import com.alibaba.dubbo.common.extension.SPI;
+import com.alibaba.dubbo.container.page.Page;
+
+/**
+ * PageHandler
+ */
+@SPI
+public interface PageHandler {
+
+    /**
+     * Handle the page.
+     *
+     * @param url
+     * @return the page.
+     */
+    Page handle(URL url);
+
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/PageServlet.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple;
+
+import com.alibaba.dubbo.common.Constants;
+import com.alibaba.dubbo.common.URL;
+import com.alibaba.dubbo.common.extension.ExtensionLoader;
+import com.alibaba.dubbo.common.logger.Logger;
+import com.alibaba.dubbo.common.logger.LoggerFactory;
+import com.alibaba.dubbo.common.utils.StringUtils;
+import com.alibaba.dubbo.container.page.Menu;
+import com.alibaba.dubbo.container.page.MenuComparator;
+import com.alibaba.dubbo.container.page.Page;
+import com.alibaba.dubbo.container.page.PageHandler;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Random;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * PageServlet
+ */
+public class PageServlet extends HttpServlet {
+
+    protected static final Logger logger = LoggerFactory.getLogger(com.alibaba.dubbo.container.page.PageServlet.class);
+    private static final long serialVersionUID = -8370312705453328501L;
+    private static com.alibaba.dubbo.container.page.PageServlet INSTANCE;
+    protected final Random random = new Random();
+    protected final Map<String, PageHandler> pages = new ConcurrentHashMap<String, PageHandler>();
+    protected final List<PageHandler> menus = new ArrayList<PageHandler>();
+
+    public static com.alibaba.dubbo.container.page.PageServlet getInstance() {
+        return INSTANCE;
+    }
+
+    public List<PageHandler> getMenus() {
+        return Collections.unmodifiableList(menus);
+    }
+
+    @Override
+    public void init() throws ServletException {
+        super.init();
+        INSTANCE = this;
+        String config = getServletConfig().getInitParameter("pages");
+        Collection<String> names;
+        if (config != null && config.length() > 0) {
+            names = Arrays.asList(Constants.COMMA_SPLIT_PATTERN.split(config));
+        } else {
+            names = ExtensionLoader.getExtensionLoader(PageHandler.class).getSupportedExtensions();
+        }
+        for (String name : names) {
+            PageHandler handler = ExtensionLoader.getExtensionLoader(PageHandler.class).getExtension(name);
+            pages.put(ExtensionLoader.getExtensionLoader(PageHandler.class).getExtensionName(handler), handler);
+            Menu menu = handler.getClass().getAnnotation(Menu.class);
+            if (menu != null) {
+                menus.add(handler);
+            }
+        }
+        Collections.sort(menus, new MenuComparator());
+    }
+
+    @Override
+    protected final void doGet(HttpServletRequest request, HttpServletResponse response)
+            throws ServletException, IOException {
+        doPost(request, response);
+    }
+
+    @Override
+    protected final void doPost(HttpServletRequest request, HttpServletResponse response)
+            throws ServletException, IOException {
+        if (!response.isCommitted()) {
+            PrintWriter writer = response.getWriter();
+            String uri = request.getRequestURI();
+            boolean isHtml = false;
+            if (uri == null || uri.length() == 0 || "/".equals(uri)) {
+                uri = "index";
+                isHtml = true;
+            } else {
+                if (uri.startsWith("/")) {
+                    uri = uri.substring(1);
+                }
+                if (uri.endsWith(".html")) {
+                    uri = uri.substring(0, uri.length() - ".html".length());
+                    isHtml = true;
+                }
+            }
+            if (uri.endsWith("favicon.ico")) {
+                response.sendError(HttpServletResponse.SC_NOT_FOUND);
+                return;
+            }
+            ExtensionLoader<PageHandler> pageHandlerLoader = ExtensionLoader.getExtensionLoader(PageHandler.class);
+            PageHandler pageHandler = pageHandlerLoader.hasExtension(uri) ? pageHandlerLoader.getExtension(uri) : null;
+            if (isHtml) {
+                writer.println("<html><head><title>Dubbo</title>");
+                writer.println("<style type=\"text/css\">html, body {margin: 10;padding: 0;background-color: #6D838C;font-family: Arial, Verdana;font-size: 12px;color: #FFFFFF;text-align: center;vertical-align: middle;word-break: break-all; } table {width: 90%; margin: 0px auto;border-collapse: collapse;border: 8px solid #FFFFFF; } thead tr {background-color: #253c46; } tbody tr {background-color: #8da5af; } th {padding-top: 4px;padding-bottom: 4px;font-size: 14px;height: 20px; } td {margin: 3px;padding: 3px;border: 2px solid #FFFFFF;font-size: 14px;height: 25px; } a {color: #FFFFFF;cursor: pointer;text-decoration: underline; } a:hover {text-decoration: none; }</style>");
+                writer.println("</head><body>");
+            }
+            if (pageHandler != null) {
+                Page page = null;
+                try {
+                    String query = request.getQueryString();
+                    page = pageHandler.handle(URL.valueOf(request.getRequestURL().toString()
+                            + (query == null || query.length() == 0 ? "" : "?" + query)));
+                } catch (Throwable t) {
+                    logger.warn(t.getMessage(), t);
+                    String msg = t.getMessage();
+                    if (msg == null) {
+                        msg = StringUtils.toString(t);
+                    }
+                    if (isHtml) {
+                        writer.println("<table>");
+                        writer.println("<thead>");
+                        writer.println("    <tr>");
+                        writer.println("        <th>Error</th>");
+                        writer.println("    </tr>");
+                        writer.println("</thead>");
+                        writer.println("<tbody>");
+                        writer.println("    <tr>");
+                        writer.println("        <td>");
+                        writer.println("            " + msg.replace("<", "&lt;").replace(">", "&lt;").replace("\n", "<br/>"));
+                        writer.println("        </td>");
+                        writer.println("    </tr>");
+                        writer.println("</tbody>");
+                        writer.println("</table>");
+                        writer.println("<br/>");
+                    } else {
+                        writer.println(msg);
+                    }
+                }
+                if (page != null) {
+                    if (isHtml) {
+                        String nav = page.getNavigation();
+                        if (nav == null || nav.length() == 0) {
+                            nav = ExtensionLoader.getExtensionLoader(PageHandler.class).getExtensionName(pageHandler);
+                            nav = nav.substring(0, 1).toUpperCase() + nav.substring(1);
+                        }
+                        if (!"index".equals(uri)) {
+                            nav = "<a href=\"/\">Home</a> &gt; " + nav;
+                        }
+                        writeMenu(request, writer, nav);
+                        writeTable(writer, page.getTitle(), page.getColumns(),
+                                page.getRows());
+                    } else {
+                        if (page.getRows().size() > 0 && page.getRows().get(0).size() > 0) {
+                            writer.println(page.getRows().get(0).get(0));
+                        }
+                    }
+                }
+            } else {
+                if (isHtml) {
+                    writer.println("<table>");
+                    writer.println("<thead>");
+                    writer.println("    <tr>");
+                    writer.println("        <th>Error</th>");
+                    writer.println("    </tr>");
+                    writer.println("</thead>");
+                    writer.println("<tbody>");
+                    writer.println("    <tr>");
+                    writer.println("        <td>");
+                    writer.println("            Not found " + uri + " page. Please goto <a href=\"/\">Home</a> page.");
+                    writer.println("        </td>");
+                    writer.println("    </tr>");
+                    writer.println("</tbody>");
+                    writer.println("</table>");
+                    writer.println("<br/>");
+                } else {
+                    writer.println("Not found " + uri + " page.");
+                }
+            }
+            if (isHtml) {
+                writer.println("</body></html>");
+            }
+            writer.flush();
+        }
+    }
+
+    protected final void writeMenu(HttpServletRequest request, PrintWriter writer, String nav) {
+        writer.println("<table>");
+        writer.println("<thead>");
+        writer.println("    <tr>");
+        for (PageHandler handler : menus) {
+            String uri = ExtensionLoader.getExtensionLoader(PageHandler.class).getExtensionName(handler);
+            Menu menu = handler.getClass().getAnnotation(Menu.class);
+            writer.println("        <th><a href=\"" + uri + ".html\">" + menu.name() + "</a></th>");
+        }
+        writer.println("    </tr>");
+        writer.println("</thead>");
+        writer.println("<tbody>");
+        writer.println("    <tr>");
+        writer.println("        <td style=\"text-align: left\" colspan=\"" + menus.size() + "\">");
+        writer.println(nav);
+        writer.println("        </td>");
+        writer.println("    </tr>");
+        writer.println("</tbody>");
+        writer.println("</table>");
+        writer.println("<br/>");
+    }
+
+    protected final void writeTable(PrintWriter writer, String title, List<String> columns,
+                                    List<List<String>> rows) {
+        int n = random.nextInt();
+        int c = (columns == null ? (rows == null || rows.size() == 0 ? 0 : rows.get(0).size())
+                : columns.size());
+        int r = (rows == null ? 0 : rows.size());
+        writer.println("<table>");
+        writer.println("<thead>");
+        writer.println("    <tr>");
+        writer.println("        <th colspan=\"" + c + "\">" + title + "</th>");
+        writer.println("    </tr>");
+        if (columns != null && columns.size() > 0) {
+            writer.println("    <tr>");
+            for (int i = 0; i < columns.size(); i++) {
+                String col = columns.get(i);
+                if (col.endsWith(":")) {
+                    col += " <input type=\"text\" id=\"in_"
+                            + n
+                            + "_"
+                            + i
+                            + "\" onkeyup=\"for (var i = 0; i < "
+                            + r
+                            + "; i ++) { var m = true; for (var j = 0; j < "
+                            + columns.size()
+                            + "; j ++) { if (document.getElementById('in_"
+                            + n
+                            + "_' + j)) { var iv = document.getElementById('in_"
+                            + n
+                            + "_' + j).value; var tv = document.getElementById('td_"
+                            + n
+                            + "_' + i + '_' + j).innerHTML; if (iv.length > 0 && (tv.length < iv.length || tv.indexOf(iv) == -1)) { m = false; break; } } } document.getElementById('tr_"
+                            + n
+                            + "_' + i).style.display = (m ? '' : 'none');}\" sytle=\"width: 100%\" />";
+                }
+                writer.println("        <td>" + col + "</td>");
+            }
+            writer.println("    </tr>");
+        }
+        writer.println("</thead>");
+        if (rows != null && rows.size() > 0) {
+            writer.println("<tbody>");
+            int i = 0;
+            for (Collection<String> row : rows) {
+                writer.println("    <tr id=\"tr_" + n + "_" + i + "\">");
+                int j = 0;
+                for (String col : row) {
+                    writer.println("        <td id=\"td_" + n + "_" + i + "_" + j
+                            + "\" style=\"display: ;\">" + col + "</td>");
+                    j++;
+                }
+                writer.println("    </tr>");
+                i++;
+            }
+            writer.println("</tbody>");
+        }
+        writer.println("</table>");
+        writer.println("<br/>");
+    }
+
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/ResourceFilter.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple;
+
+import com.alibaba.dubbo.common.Constants;
+
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * ResourceServlet
+ */
+public class ResourceFilter implements Filter {
+
+    private static final String CLASSPATH_PREFIX = "classpath:";
+
+    private final long start = System.currentTimeMillis();
+
+    private final List<String> resources = new ArrayList<String>();
+
+    public void init(FilterConfig filterConfig) throws ServletException {
+        String config = filterConfig.getInitParameter("resources");
+        if (config != null && config.length() > 0) {
+            String[] configs = Constants.COMMA_SPLIT_PATTERN.split(config);
+            for (String c : configs) {
+                if (c != null && c.length() > 0) {
+                    c = c.replace('\\', '/');
+                    if (c.endsWith("/")) {
+                        c = c.substring(0, c.length() - 1);
+                    }
+                    resources.add(c);
+                }
+            }
+        }
+    }
+
+    public void destroy() {
+    }
+
+    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
+            throws IOException, ServletException {
+        HttpServletRequest request = (HttpServletRequest) req;
+        HttpServletResponse response = (HttpServletResponse) res;
+        if (response.isCommitted()) {
+            return;
+        }
+        String uri = request.getRequestURI();
+        String context = request.getContextPath();
+        if (uri.endsWith("/favicon.ico")) {
+            uri = "/favicon.ico";
+        } else if (context != null && !"/".equals(context)) {
+            uri = uri.substring(context.length());
+        }
+        if (!uri.startsWith("/")) {
+            uri = "/" + uri;
+        }
+        long lastModified = getLastModified(uri);
+        long since = request.getDateHeader("If-Modified-Since");
+        if (since >= lastModified) {
+            response.sendError(HttpServletResponse.SC_NOT_MODIFIED);
+            return;
+        }
+        byte[] data;
+        InputStream input = getInputStream(uri);
+        if (input == null) {
+            chain.doFilter(req, res);
+            return;
+        }
+        try {
+            ByteArrayOutputStream output = new ByteArrayOutputStream();
+            byte[] buffer = new byte[8192];
+            int n = 0;
+            while (-1 != (n = input.read(buffer))) {
+                output.write(buffer, 0, n);
+            }
+            data = output.toByteArray();
+        } finally {
+            input.close();
+        }
+        response.setDateHeader("Last-Modified", lastModified);
+        OutputStream output = response.getOutputStream();
+        output.write(data);
+        output.flush();
+    }
+
+    private boolean isFile(String path) {
+        return path.startsWith("/") || path.indexOf(":") <= 1;
+    }
+
+    private long getLastModified(String uri) {
+        for (String resource : resources) {
+            if (resource != null && resource.length() > 0) {
+                String path = resource + uri;
+                if (isFile(path)) {
+                    File file = new File(path);
+                    if (file.exists()) {
+                        return file.lastModified();
+                    }
+                }
+            }
+        }
+        return start;
+    }
+
+    private InputStream getInputStream(String uri) {
+        for (String resource : resources) {
+            String path = resource + uri;
+            try {
+                if (isFile(path)) {
+                    return new FileInputStream(path);
+                } else if (path.startsWith(CLASSPATH_PREFIX)) {
+                    return Thread.currentThread().getContextClassLoader().getResourceAsStream(path.substring(CLASSPATH_PREFIX.length()));
+                } else {
+                    return new URL(path).openStream();
+                }
+            } catch (IOException e) {
+            }
+        }
+        return null;
+    }
+
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/pages/ClientsPageHandler.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple.pages;
+
+import com.alibaba.dubbo.common.URL;
+import com.alibaba.dubbo.common.utils.NetUtils;
+import com.alibaba.dubbo.container.page.Page;
+import com.alibaba.dubbo.container.page.PageHandler;
+import com.alibaba.dubbo.remoting.exchange.ExchangeChannel;
+import com.alibaba.dubbo.remoting.exchange.ExchangeServer;
+import com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+/**
+ * ClientsPageHandler
+ */
+public class ClientsPageHandler implements PageHandler {
+
+    public Page handle(URL url) {
+        String port = url.getParameter("port");
+        int p = port == null || port.length() == 0 ? 0 : Integer.parseInt(port);
+        Collection<ExchangeServer> servers = DubboProtocol.getDubboProtocol().getServers();
+        ExchangeServer server = null;
+        StringBuilder select = new StringBuilder();
+        if (servers != null && servers.size() > 0) {
+            if (servers.size() == 1) {
+                server = servers.iterator().next();
+                String address = server.getUrl().getAddress();
+                select.append(" &gt; " + NetUtils.getHostName(address) + "/" + address);
+            } else {
+                select.append(" &gt; <select onchange=\"window.location.href='clients.html?port=' + this.value;\">");
+                for (ExchangeServer s : servers) {
+                    int sp = s.getUrl().getPort();
+                    select.append("<option value=\">");
+                    select.append(sp);
+                    if (p == 0 && server == null || p == sp) {
+                        server = s;
+                        select.append("\" selected=\"selected");
+                    }
+                    select.append("\">");
+                    select.append(s.getUrl().getAddress());
+                    select.append("</option>");
+                }
+                select.append("</select>");
+            }
+        }
+        List<List<String>> rows = new ArrayList<List<String>>();
+        if (server != null) {
+            Collection<ExchangeChannel> channels = server.getExchangeChannels();
+            for (ExchangeChannel c : channels) {
+                List<String> row = new ArrayList<String>();
+                String address = NetUtils.toAddressString(c.getRemoteAddress());
+                row.add(NetUtils.getHostName(address) + "/" + address);
+                rows.add(row);
+            }
+        }
+        return new Page("<a href=\"servers.html\">Servers</a>" + select.toString() + " &gt; Clients", "Clients (" + rows.size() + ")", new String[]{"Client Address:"}, rows);
+    }
+
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/pages/HomePageHandler.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple.pages;
+
+import com.alibaba.dubbo.common.URL;
+import com.alibaba.dubbo.common.extension.ExtensionLoader;
+import com.alibaba.dubbo.container.page.Menu;
+import com.alibaba.dubbo.container.page.Page;
+import com.alibaba.dubbo.container.page.PageHandler;
+import com.alibaba.dubbo.container.page.PageServlet;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * HomePageHandler
+ */
+@Menu(name = "Home", desc = "Home page.", order = Integer.MIN_VALUE)
+public class HomePageHandler implements PageHandler {
+
+    public Page handle(URL url) {
+        List<List<String>> rows = new ArrayList<List<String>>();
+        for (PageHandler handler : PageServlet.getInstance().getMenus()) {
+            String uri = ExtensionLoader.getExtensionLoader(PageHandler.class).getExtensionName(handler);
+            Menu menu = handler.getClass().getAnnotation(Menu.class);
+            List<String> row = new ArrayList<String>();
+            row.add("<a href=\"" + uri + ".html\">" + menu.name() + "</a>");
+            row.add(menu.desc());
+            rows.add(row);
+        }
+        return new Page("Home", "Menus", new String[]{"Menu Name", "Menu Desc"}, rows);
+    }
+
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/pages/LogPageHandler.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple.pages;
+
+import com.alibaba.dubbo.common.URL;
+import com.alibaba.dubbo.container.page.Menu;
+import com.alibaba.dubbo.container.page.Page;
+import com.alibaba.dubbo.container.page.PageHandler;
+
+import org.apache.log4j.Appender;
+import org.apache.log4j.FileAppender;
+import org.apache.log4j.Level;
+import org.apache.log4j.LogManager;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.Enumeration;
+import java.util.List;
+
+/**
+ * LogPageHandler
+ */
+@Menu(name = "Log", desc = "Show system log.", order = Integer.MAX_VALUE - 11000)
+public class LogPageHandler implements PageHandler {
+
+    private static final int SHOW_LOG_LENGTH = 30000;
+
+    private File file;
+
+    @SuppressWarnings("unchecked")
+    public LogPageHandler() {
+        try {
+            org.apache.log4j.Logger logger = LogManager.getRootLogger();
+            if (logger != null) {
+                Enumeration<Appender> appenders = logger.getAllAppenders();
+                if (appenders != null) {
+                    while (appenders.hasMoreElements()) {
+                        Appender appender = appenders.nextElement();
+                        if (appender instanceof FileAppender) {
+                            FileAppender fileAppender = (FileAppender) appender;
+                            String filename = fileAppender.getFile();
+                            file = new File(filename);
+                            break;
+                        }
+                    }
+                }
+            }
+        } catch (Throwable t) {
+        }
+    }
+
+    public Page handle(URL url) {
+        long size = 0;
+        String content = "";
+        String modified = "Not exist";
+        if (file != null && file.exists()) {
+            try {
+                FileInputStream fis = new FileInputStream(file);
+                FileChannel channel = fis.getChannel();
+                size = channel.size();
+                ByteBuffer bb;
+                if (size <= SHOW_LOG_LENGTH) {
+                    bb = ByteBuffer.allocate((int) size);
+                    channel.read(bb, 0);
+                } else {
+                    int pos = (int) (size - SHOW_LOG_LENGTH);
+                    bb = ByteBuffer.allocate(SHOW_LOG_LENGTH);
+                    channel.read(bb, pos);
+                }
+                bb.flip();
+                content = new String(bb.array()).replace("<", "&lt;")
+                        .replace(">", "&gt;").replace("\n", "<br/><br/>");
+                modified = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
+                        .format(new Date(file.lastModified()));
+            } catch (IOException e) {
+            }
+        }
+        Level level = LogManager.getRootLogger().getLevel();
+        List<List<String>> rows = new ArrayList<List<String>>();
+        List<String> row = new ArrayList<String>();
+        row.add(content);
+        rows.add(row);
+        return new Page("Log", "Log", new String[]{(file == null ? "" : file.getName()) + ", " + size + " bytes, " + modified + ", " + level}, rows);
+    }
+
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/pages/RegisteredPageHandler.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple.pages;
+
+import com.alibaba.dubbo.common.URL;
+import com.alibaba.dubbo.container.page.Page;
+import com.alibaba.dubbo.container.page.PageHandler;
+import com.alibaba.dubbo.registry.Registry;
+import com.alibaba.dubbo.registry.support.AbstractRegistry;
+import com.alibaba.dubbo.registry.support.AbstractRegistryFactory;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * RegisteredPageHandler
+ */
+public class RegisteredPageHandler implements PageHandler {
+
+    public Page handle(URL url) {
+        String registryAddress = url.getParameter("registry", "");
+        List<List<String>> rows = new ArrayList<List<String>>();
+        Collection<Registry> registries = AbstractRegistryFactory.getRegistries();
+        StringBuilder select = new StringBuilder();
+        Registry registry = null;
+        if (registries != null && registries.size() > 0) {
+            if (registries.size() == 1) {
+                registry = registries.iterator().next();
+                select.append(" &gt; " + registry.getUrl().getAddress());
+            } else {
+                select.append(" &gt; <select onchange=\"window.location.href='registered.html?registry=' + this.value;\">");
+                for (Registry r : registries) {
+                    String sp = r.getUrl().getAddress();
+                    select.append("<option value=\">");
+                    select.append(sp);
+                    if (((registryAddress == null || registryAddress.length() == 0) && registry == null)
+                            || registryAddress.equals(sp)) {
+                        registry = r;
+                        select.append("\" selected=\"selected");
+                    }
+                    select.append("\">");
+                    select.append(sp);
+                    select.append("</option>");
+                }
+                select.append("</select>");
+            }
+        }
+        if (registry instanceof AbstractRegistry) {
+            Set<URL> services = ((AbstractRegistry) registry).getRegistered();
+            if (services != null && services.size() > 0) {
+                for (URL u : services) {
+                    List<String> row = new ArrayList<String>();
+                    row.add(u.toFullString().replace("<", "&lt;").replace(">", "&gt;"));
+                    rows.add(row);
+                }
+            }
+        }
+        return new Page("<a href=\"registries.html\">Registries</a>" + select.toString() + " &gt; Registered | <a href=\"subscribed.html?registry=" + registryAddress + "\">Subscribed</a>", "Registered (" + rows.size() + ")",
+                new String[]{"Provider URL:"}, rows);
+    }
+
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/pages/RegistriesPageHandler.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple.pages;
+
+import com.alibaba.dubbo.common.URL;
+import com.alibaba.dubbo.common.utils.NetUtils;
+import com.alibaba.dubbo.container.page.Menu;
+import com.alibaba.dubbo.container.page.Page;
+import com.alibaba.dubbo.container.page.PageHandler;
+import com.alibaba.dubbo.registry.Registry;
+import com.alibaba.dubbo.registry.support.AbstractRegistry;
+import com.alibaba.dubbo.registry.support.AbstractRegistryFactory;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+/**
+ * RegistriesPageHandler
+ */
+@Menu(name = "Registries", desc = "Show connected registries.", order = 10000)
+public class RegistriesPageHandler implements PageHandler {
+
+    public Page handle(URL url) {
+        List<List<String>> rows = new ArrayList<List<String>>();
+        Collection<Registry> registries = AbstractRegistryFactory.getRegistries();
+        int registeredCount = 0;
+        int subscribedCount = 0;
+        if (registries != null && registries.size() > 0) {
+            for (Registry registry : registries) {
+                String server = registry.getUrl().getAddress();
+                List<String> row = new ArrayList<String>();
+                row.add(NetUtils.getHostName(server) + "/" + server);
+                if (registry.isAvailable()) {
+                    row.add("<font color=\"green\">Connected</font>");
+                } else {
+                    row.add("<font color=\"red\">Disconnected</font>");
+                }
+                int registeredSize = 0;
+                int subscribedSize = 0;
+                if (registry instanceof AbstractRegistry) {
+                    registeredSize = ((AbstractRegistry) registry).getRegistered().size();
+                    registeredCount += registeredSize;
+                    subscribedSize = ((AbstractRegistry) registry).getSubscribed().size();
+                    subscribedCount += subscribedSize;
+                }
+                row.add("<a href=\"registered.html?registry=" + server + "\">Registered(" + registeredSize + ")</a>");
+                row.add("<a href=\"subscribed.html?registry=" + server + "\">Subscribed(" + subscribedSize + ")</a>");
+                rows.add(row);
+            }
+        }
+        return new Page("Registries", "Registries (" + rows.size() + ")",
+                new String[]{"Registry Address:", "Status", "Registered(" + registeredCount + ")", "Subscribed(" + subscribedCount + ")"}, rows);
+    }
+
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/pages/ServersPageHandler.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple.pages;
+
+import com.alibaba.dubbo.common.URL;
+import com.alibaba.dubbo.common.utils.NetUtils;
+import com.alibaba.dubbo.container.page.Menu;
+import com.alibaba.dubbo.container.page.Page;
+import com.alibaba.dubbo.container.page.PageHandler;
+import com.alibaba.dubbo.remoting.exchange.ExchangeServer;
+import com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+/**
+ * ServersPageHandler
+ */
+@Menu(name = "Servers", desc = "Show exported service servers.", order = 14000)
+public class ServersPageHandler implements PageHandler {
+
+    public Page handle(URL url) {
+        List<List<String>> rows = new ArrayList<List<String>>();
+        Collection<ExchangeServer> servers = DubboProtocol.getDubboProtocol().getServers();
+        int clientCount = 0;
+        if (servers != null && servers.size() > 0) {
+            for (ExchangeServer s : servers) {
+                List<String> row = new ArrayList<String>();
+                String address = s.getUrl().getAddress();
+                row.add(NetUtils.getHostName(address) + "/" + address);
+                int clientSize = s.getExchangeChannels().size();
+                clientCount += clientSize;
+                row.add("<a href=\"clients.html?port=" + s.getUrl().getPort() + "\">Clients(" + clientSize + ")</a>");
+                rows.add(row);
+            }
+        }
+        return new Page("Servers", "Servers (" + rows.size() + ")", new String[]{"Server Address:", "Clients(" + clientCount + ")"}, rows);
+    }
+
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/pages/StatusPageHandler.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple.pages;
+
+import com.alibaba.dubbo.common.URL;
+import com.alibaba.dubbo.common.extension.ExtensionLoader;
+import com.alibaba.dubbo.common.status.Status;
+import com.alibaba.dubbo.common.status.StatusChecker;
+import com.alibaba.dubbo.common.status.support.StatusUtils;
+import com.alibaba.dubbo.container.page.Menu;
+import com.alibaba.dubbo.container.page.Page;
+import com.alibaba.dubbo.container.page.PageHandler;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * StatusPageHandler
+ */
+@Menu(name = "Status", desc = "Show system status.", order = Integer.MAX_VALUE - 12000)
+public class StatusPageHandler implements PageHandler {
+
+    public Page handle(URL url) {
+        List<List<String>> rows = new ArrayList<List<String>>();
+        Set<String> names = ExtensionLoader.getExtensionLoader(StatusChecker.class).getSupportedExtensions();
+        Map<String, Status> statuses = new HashMap<String, Status>();
+        for (String name : names) {
+            StatusChecker checker = ExtensionLoader.getExtensionLoader(StatusChecker.class).getExtension(name);
+            List<String> row = new ArrayList<String>();
+            row.add(name);
+            Status status = checker.check();
+            if (status != null && !Status.Level.UNKNOWN.equals(status.getLevel())) {
+                statuses.put(name, status);
+                row.add(getLevelHtml(status.getLevel()));
+                row.add(status.getMessage());
+                rows.add(row);
+            }
+        }
+        Status status = StatusUtils.getSummaryStatus(statuses);
+        if ("status".equals(url.getPath())) {
+            return new Page("", "", "", status.getLevel().toString());
+        } else {
+            List<String> row = new ArrayList<String>();
+            row.add("summary");
+            row.add(getLevelHtml(status.getLevel()));
+            row.add("<a href=\"/status\" target=\"_blank\">summary</a>");
+            rows.add(row);
+            return new Page("Status (<a href=\"/status\" target=\"_blank\">summary</a>)", "Status", new String[]{"Name", "Status", "Description"}, rows);
+        }
+    }
+
+    private String getLevelHtml(Status.Level level) {
+        return "<font color=\"" + getLevelColor(level) + "\">" + level.name() + "</font>";
+    }
+
+    private String getLevelColor(Status.Level level) {
+        if (level == Status.Level.OK) {
+            return "green";
+        } else if (level == Status.Level.ERROR) {
+            return "red";
+        } else if (level == Status.Level.WARN) {
+            return "yellow";
+        }
+        return "gray";
+    }
+
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/pages/SubscribedPageHandler.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple.pages;
+
+import com.alibaba.dubbo.common.URL;
+import com.alibaba.dubbo.container.page.Page;
+import com.alibaba.dubbo.container.page.PageHandler;
+import com.alibaba.dubbo.registry.Registry;
+import com.alibaba.dubbo.registry.support.AbstractRegistry;
+import com.alibaba.dubbo.registry.support.AbstractRegistryFactory;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * SubscribedPageHandler
+ */
+public class SubscribedPageHandler implements PageHandler {
+
+    public Page handle(URL url) {
+        String registryAddress = url.getParameter("registry", "");
+        List<List<String>> rows = new ArrayList<List<String>>();
+        Collection<Registry> registries = AbstractRegistryFactory.getRegistries();
+        StringBuilder select = new StringBuilder();
+        Registry registry = null;
+        if (registries != null && registries.size() > 0) {
+            if (registries.size() == 1) {
+                registry = registries.iterator().next();
+                select.append(" &gt; " + registry.getUrl().getAddress());
+            } else {
+                select.append(" &gt; <select onchange=\"window.location.href='subscribed.html?registry=' + this.value;\">");
+                for (Registry r : registries) {
+                    String sp = r.getUrl().getAddress();
+                    select.append("<option value=\">");
+                    select.append(sp);
+                    if (((registryAddress == null || registryAddress.length() == 0) && registry == null)
+                            || registryAddress.equals(sp)) {
+                        registry = r;
+                        select.append("\" selected=\"selected");
+                    }
+                    select.append("\">");
+                    select.append(sp);
+                    select.append("</option>");
+                }
+                select.append("</select>");
+            }
+        }
+        if (registry instanceof AbstractRegistry) {
+            Set<URL> services = ((AbstractRegistry) registry).getSubscribed().keySet();
+            if (services != null && services.size() > 0) {
+                for (URL u : services) {
+                    List<String> row = new ArrayList<String>();
+                    row.add(u.toFullString().replace("<", "&lt;").replace(">", "&gt;"));
+                    rows.add(row);
+                }
+            }
+        }
+        return new Page("<a href=\"registries.html\">Registries</a>" + select.toString() + " &gt; <a href=\"registered.html?registry=" + registryAddress + "\">Registered</a> | Subscribed", "Subscribed (" + rows.size() + ")",
+                new String[]{"Consumer URL:"}, rows);
+    }
+
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/java/com/alibaba/dubbo/monitor/simple/pages/SystemPageHandler.java

+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.dubbo.monitor.simple.pages;
+
+import com.alibaba.dubbo.common.URL;
+import com.alibaba.dubbo.common.Version;
+import com.alibaba.dubbo.common.utils.NetUtils;
+import com.alibaba.dubbo.container.page.Menu;
+import com.alibaba.dubbo.container.page.Page;
+import com.alibaba.dubbo.container.page.PageHandler;
+
+import java.lang.management.ManagementFactory;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+import java.util.Locale;
+
+/**
+ * SystemPageHandler
+ */
+@Menu(name = "System", desc = "Show system environment information.", order = Integer.MAX_VALUE - 10000)
+public class SystemPageHandler implements PageHandler {
+
+    private static final long SECOND = 1000;
+    private static final long MINUTE = 60 * SECOND;
+    private static final long HOUR = 60 * MINUTE;
+    private static final long DAY = 24 * HOUR;
+
+    public Page handle(URL url) {
+        List<List<String>> rows = new ArrayList<List<String>>();
+        List<String> row;
+
+        row = new ArrayList<String>();
+        row.add("Version");
+        row.add(Version.getVersion(com.alibaba.dubbo.container.page.pages.SystemPageHandler.class, "2.0.0"));
+        rows.add(row);
+
+        row = new ArrayList<String>();
+        row.add("Host");
+        String address = NetUtils.getLocalHost();
+        row.add(NetUtils.getHostName(address) + "/" + address);
+        rows.add(row);
+
+        row = new ArrayList<String>();
+        row.add("OS");
+        row.add(System.getProperty("os.name") + " " + System.getProperty("os.version"));
+        rows.add(row);
+
+        row = new ArrayList<String>();
+        row.add("JVM");
+        row.add(System.getProperty("java.runtime.name") + " " + System.getProperty("java.runtime.version") + ",<br/>" + System.getProperty("java.vm.name") + " " + System.getProperty("java.vm.version") + " " + System.getProperty("java.vm.info", ""));
+        rows.add(row);
+
+        row = new ArrayList<String>();
+        row.add("CPU");
+        row.add(System.getProperty("os.arch", "") + ", " + String.valueOf(Runtime.getRuntime().availableProcessors()) + " cores");
+        rows.add(row);
+
+        row = new ArrayList<String>();
+        row.add("Locale");
+        row.add(Locale.getDefault().toString() + "/" + System.getProperty("file.encoding"));
+        rows.add(row);
+
+        row = new ArrayList<String>();
+        row.add("Uptime");
+        row.add(formatUptime(ManagementFactory.getRuntimeMXBean().getUptime()));
+        rows.add(row);
+
+        row = new ArrayList<String>();
+        row.add("Time");
+        row.add(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS Z").format(new Date()));
+        rows.add(row);
+
+        return new Page("System", "System", new String[]{
+                "Property", "Value"}, rows);
+    }
+
+    private String formatUptime(long uptime) {
+        StringBuilder buf = new StringBuilder();
+        if (uptime > DAY) {
+            long days = (uptime - uptime % DAY) / DAY;
+            buf.append(days);
+            buf.append(" Days");
+            uptime = uptime % DAY;
+        }
+        if (uptime > HOUR) {
+            long hours = (uptime - uptime % HOUR) / HOUR;
+            if (buf.length() > 0) {
+                buf.append(", ");
+            }
+            buf.append(hours);
+            buf.append(" Hours");
+            uptime = uptime % HOUR;
+        }
+        if (uptime > MINUTE) {
+            long minutes = (uptime - uptime % MINUTE) / MINUTE;
+            if (buf.length() > 0) {
+                buf.append(", ");
+            }
+            buf.append(minutes);
+            buf.append(" Minutes");
+            uptime = uptime % MINUTE;
+        }
+        if (uptime > SECOND) {
+            long seconds = (uptime - uptime % SECOND) / SECOND;
+            if (buf.length() > 0) {
+                buf.append(", ");
+            }
+            buf.append(seconds);
+            buf.append(" Seconds");
+            uptime = uptime % SECOND;
+        }
+        if (uptime > 0) {
+            if (buf.length() > 0) {
+                buf.append(", ");
+            }
+            buf.append(uptime);
+            buf.append(" Milliseconds");
+        }
+        return buf.toString();
+    }
+}
\ No newline at end of file

dubbo-monitor-simple/src/main/resources/META-INF/dubbo/internal/com.alibaba.dubbo.container.Container

-registry=com.alibaba.dubbo.monitor.simple.RegistryContainer
\ No newline at end of file
+registry=com.alibaba.dubbo.monitor.simple.RegistryContainer
+jetty=com.alibaba.dubbo.container.jetty.JettyContainer
\ No newline at end of file

dubbo-monitor-simple/src/main/resources/META-INF/dubbo/internal/com.alibaba.dubbo.container.page.PageHandler

@@ -7,4 +7,13 @@ applications=com.alibaba.dubbo.monitor.simple.pages.ApplicationsPageHandler
 dependencies=com.alibaba.dubbo.monitor.simple.pages.DependenciesPageHandler
 hosts=com.alibaba.dubbo.monitor.simple.pages.HostsPageHandler
 unregister=com.alibaba.dubbo.monitor.simple.pages.UnregisterPageHandler
-unsubscribe=com.alibaba.dubbo.monitor.simple.pages.UnsubscribePageHandler
\ No newline at end of file
+unsubscribe=com.alibaba.dubbo.monitor.simple.pages.UnsubscribePageHandler
+index=com.alibaba.dubbo.container.page.pages.HomePageHandler
+status=com.alibaba.dubbo.container.page.pages.StatusPageHandler
+log=com.alibaba.dubbo.container.page.pages.LogPageHandler
+system=com.alibaba.dubbo.container.page.pages.SystemPageHandler
+registries=com.alibaba.dubbo.registry.pages.RegistriesPageHandler
+registered=com.alibaba.dubbo.registry.pages.RegisteredPageHandler
+subscribed=com.alibaba.dubbo.registry.pages.SubscribedPageHandler
+servers=com.alibaba.dubbo.rpc.protocol.dubbo.page.ServersPageHandler
+clients=com.alibaba.dubbo.rpc.protocol.dubbo.page.ClientsPageHandler
\ No newline at end of file

pom.xml

@@ -7,17 +7,16 @@
     <parent>
         <groupId>com.alibaba</groupId>
         <artifactId>dubbo-parent</artifactId>
-        <version>2.6.0</version>
+        <version>2.6.1</version>
     </parent>
 
-    <groupId>com.alibaba</groupId>
     <artifactId>dubbo-ops</artifactId>
     <version>2.0.0</version>
     <packaging>pom</packaging>
 
     <properties>
-        <dubbo_all_version>2.6.0</dubbo_all_version>
-        <dubbo_version>2.6.0</dubbo_version>
+        <dubbo_all_version>2.6.1</dubbo_all_version>
+        <dubbo_version>2.6.1</dubbo_version>
     </properties>
 
     <modules>