From c12c4dba5dc0d62f7e3ec24ce8c1821f8d2eb718 Mon Sep 17 00:00:00 2001
From: kohsuke <kohsuke@71c3de6d-444a-0410-be80-ed276b4c234a>
Date: Sun, 20 Jan 2008 19:20:34 +0000
Subject: [PATCH] Added a probe for the running Maven process to obtain system
 properties, environment variables, thread dump, and the scripting console.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@6778 71c3de6d-444a-0410-be80-ed276b4c234a
---
 .../hudson/maven/MavenModuleSetBuild.java     |  4 +
 .../java/hudson/maven/MavenProbeAction.java   | 92 ++++++++++++++++++
 core/src/main/java/hudson/model/Computer.java | 45 +--------
 core/src/main/java/hudson/model/Hudson.java   | 18 +---
 .../java/hudson/util/RemotingDiagnostics.java | 94 +++++++++++++++++++
 .../maven/MavenProbeAction/_script.jelly      |  8 ++
 .../maven/MavenProbeAction/envVars.jelly      |  9 ++
 .../hudson/maven/MavenProbeAction/index.jelly | 11 +++
 .../maven/MavenProbeAction/sidepanel.jelly    | 11 +++
 .../MavenProbeAction/systemProperties.jelly   | 10 ++
 .../maven/MavenProbeAction/threads.jelly      | 12 +++
 .../hudson/maven/Messages.properties          |  4 +-
 .../hudson/model/Hudson/_script.jelly         | 32 +------
 .../resources/lib/hudson/scriptConsole.jelly  | 35 +++++++
 14 files changed, 301 insertions(+), 84 deletions(-)
 create mode 100644 core/src/main/java/hudson/maven/MavenProbeAction.java
 create mode 100644 core/src/main/java/hudson/util/RemotingDiagnostics.java
 create mode 100644 core/src/main/resources/hudson/maven/MavenProbeAction/_script.jelly
 create mode 100644 core/src/main/resources/hudson/maven/MavenProbeAction/envVars.jelly
 create mode 100644 core/src/main/resources/hudson/maven/MavenProbeAction/index.jelly
 create mode 100644 core/src/main/resources/hudson/maven/MavenProbeAction/sidepanel.jelly
 create mode 100644 core/src/main/resources/hudson/maven/MavenProbeAction/systemProperties.jelly
 create mode 100644 core/src/main/resources/hudson/maven/MavenProbeAction/threads.jelly
 create mode 100644 core/src/main/resources/lib/hudson/scriptConsole.jelly

diff --git a/core/src/main/java/hudson/maven/MavenModuleSetBuild.java b/core/src/main/java/hudson/maven/MavenModuleSetBuild.java
index 8191f37ca9..c2837aa2a7 100644
--- a/core/src/main/java/hudson/maven/MavenModuleSetBuild.java
+++ b/core/src/main/java/hudson/maven/MavenModuleSetBuild.java
@@ -262,10 +262,14 @@ public final class MavenModuleSetBuild extends AbstractBuild<MavenModuleSet,Mave
                     margs.addTokenized(project.getGoals());
 
                     Builder builder = new Builder(slistener, proxies, project.sortedActiveModules, margs.toList(), envVars);
+                    MavenProbeAction mpa=null;
                     try {
+                        mpa = new MavenProbeAction(project,process.channel);
+                        addAction(mpa);
                         return process.channel.call(builder);
                     } finally {
                         builder.end(launcher);
+                        getActions().remove(mpa);
                         process.discard();
                     }
                 }
diff --git a/core/src/main/java/hudson/maven/MavenProbeAction.java b/core/src/main/java/hudson/maven/MavenProbeAction.java
new file mode 100644
index 0000000000..5bf1a9fae3
--- /dev/null
+++ b/core/src/main/java/hudson/maven/MavenProbeAction.java
@@ -0,0 +1,92 @@
+package hudson.maven;
+
+import hudson.EnvVars;
+import hudson.model.AbstractProject;
+import hudson.model.Action;
+import hudson.model.Hudson;
+import hudson.remoting.Channel;
+import hudson.util.RemotingDiagnostics;
+import org.kohsuke.stapler.StaplerRequest;
+import org.kohsuke.stapler.StaplerResponse;
+
+import javax.servlet.ServletException;
+import java.io.IOException;
+import java.util.Map;
+
+/**
+ * UI for probing Maven process.
+ *
+ * <p>
+ * This action is added to a build when it's started, and removed
+ * when it's completed. 
+ * 
+ * @author Kohsuke Kawaguchi
+ * @since 1.175
+ */
+public final class MavenProbeAction implements Action {
+    private final transient Channel channel;
+
+    public final AbstractProject<?,?> owner;
+
+    MavenProbeAction(AbstractProject<?,?> owner, Channel channel) {
+        this.channel = channel;
+        this.owner = owner;
+    }
+
+    public String getIconFileName() {
+        if(channel==null)   return null;
+        return "computer.gif";
+    }
+
+    public String getDisplayName() {
+        return Messages.MavenProbeAction_DisplayName();
+    }
+
+    public String getUrlName() {
+        if(channel==null)   return null;
+        return "probe";
+    }
+
+    /**
+     * Gets the system properties of the JVM on this computer.
+     * If this is the master, it returns the system property of the master computer.
+     */
+    public Map<Object,Object> getSystemProperties() throws IOException, InterruptedException {
+        return RemotingDiagnostics.getSystemProperties(channel);
+    }
+
+    /**
+     * Gets the environment variables of the JVM on this computer.
+     * If this is the master, it returns the system property of the master computer.
+     */
+    public Map<String,String> getEnvVars() throws IOException, InterruptedException {
+        return EnvVars.getRemote(channel);
+    }
+
+    /**
+     * Gets the thread dump of the slave JVM.
+     * @return
+     *      key is the thread name, and the value is the pre-formatted dump.
+     */
+    public Map<String,String> getThreadDump() throws IOException, InterruptedException {
+        return RemotingDiagnostics.getThreadDump(channel);
+    }
+
+    public void doScript( StaplerRequest req, StaplerResponse rsp ) throws IOException, ServletException {
+        // ability to run arbitrary script is dangerous,
+        // so tie it to the admin access
+        owner.checkPermission(Hudson.ADMINISTER);
+
+        String text = req.getParameter("script");
+        if(text!=null) {
+            try {
+                req.setAttribute("output",
+                RemotingDiagnostics.executeGroovy(text,channel));
+            } catch (InterruptedException e) {
+                throw new ServletException(e);
+            }
+        }
+
+        req.getView(this,"_script.jelly").forward(req,rsp);
+    }
+}
diff --git a/core/src/main/java/hudson/model/Computer.java b/core/src/main/java/hudson/model/Computer.java
index 3b3fc93968..6f254be9d6 100644
--- a/core/src/main/java/hudson/model/Computer.java
+++ b/core/src/main/java/hudson/model/Computer.java
@@ -1,13 +1,12 @@
 package hudson.model;
 
 import hudson.EnvVars;
-import hudson.Functions;
-import hudson.remoting.Callable;
 import hudson.remoting.Channel;
 import hudson.remoting.VirtualChannel;
-import hudson.tasks.Publisher;
 import hudson.tasks.BuildWrapper;
+import hudson.tasks.Publisher;
 import hudson.util.DaemonThreadFactory;
+import hudson.util.RemotingDiagnostics;
 import hudson.util.RunList;
 import org.kohsuke.stapler.StaplerRequest;
 import org.kohsuke.stapler.StaplerResponse;
@@ -15,13 +14,9 @@ import org.kohsuke.stapler.StaplerResponse;
 import javax.servlet.ServletException;
 import java.io.IOException;
 import java.io.PrintWriter;
-import java.lang.management.ThreadInfo;
 import java.util.ArrayList;
-import java.util.Collections;
-import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.TreeMap;
 import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
@@ -257,14 +252,7 @@ public abstract class Computer extends AbstractModelObject {
      * If this is the master, it returns the system property of the master computer.
      */
     public Map<Object,Object> getSystemProperties() throws IOException, InterruptedException {
-        return getChannel().call(new GetSystemProperties());
-    }
-
-    private static final class GetSystemProperties implements Callable<Map<Object,Object>,RuntimeException> {
-        public Map<Object,Object> call() {
-            return new TreeMap<Object,Object>(System.getProperties());
-        }
-        private static final long serialVersionUID = 1L;
+        return RemotingDiagnostics.getSystemProperties(getChannel());
     }
 
     /**
@@ -281,34 +269,9 @@ public abstract class Computer extends AbstractModelObject {
      *      key is the thread name, and the value is the pre-formatted dump.
      */
     public Map<String,String> getThreadDump() throws IOException, InterruptedException {
-        VirtualChannel channel = getChannel();
-        if(channel==null)
-            return Collections.singletonMap("N/A","N/A");
-        return channel.call(new GetThreadDump());
+        return RemotingDiagnostics.getThreadDump(getChannel());
     }
 
-    private static final class GetThreadDump implements Callable<Map<String,String>,RuntimeException> {
-        public Map<String,String> call() {
-            Map<String,String> r = new LinkedHashMap<String,String>();
-            try {
-                for (ThreadInfo ti : Functions.getThreadInfos())
-                    r.put(ti.getThreadName(),Functions.dumpThreadInfo(ti));
-            } catch (LinkageError _) {
-                // not in JDK6. fall back to JDK5
-                r.clear();
-                for (Map.Entry<Thread,StackTraceElement[]> t : Thread.getAllStackTraces().entrySet()) {
-                    StringBuffer buf = new StringBuffer();
-                    for (StackTraceElement e : t.getValue())
-                        buf.append(e).append('\n');
-                    r.put(t.getKey().getName(),buf.toString());
-                }
-            }
-            return r;
-        }
-        private static final long serialVersionUID = 1L;
-    }
-
-
     public static final ExecutorService threadPoolForRemoting = Executors.newCachedThreadPool(new DaemonThreadFactory());
 
 //
diff --git a/core/src/main/java/hudson/model/Hudson.java b/core/src/main/java/hudson/model/Hudson.java
index d1f6406557..79d2dc2a15 100644
--- a/core/src/main/java/hudson/model/Hudson.java
+++ b/core/src/main/java/hudson/model/Hudson.java
@@ -61,6 +61,7 @@ import hudson.util.HudsonIsLoading;
 import hudson.util.MultipartFormDataParser;
 import hudson.util.TextFile;
 import hudson.util.XStream2;
+import hudson.util.RemotingDiagnostics;
 import hudson.widgets.Widget;
 import net.sf.json.JSONObject;
 import org.acegisecurity.Authentication;
@@ -69,7 +70,6 @@ import org.acegisecurity.GrantedAuthorityImpl;
 import org.acegisecurity.context.SecurityContextHolder;
 import org.acegisecurity.providers.anonymous.AnonymousAuthenticationToken;
 import org.acegisecurity.ui.AbstractProcessingFilter;
-import org.acegisecurity.ui.rememberme.TokenBasedRememberMeServices;
 import static org.acegisecurity.ui.rememberme.TokenBasedRememberMeServices.ACEGI_SECURITY_HASHED_REMEMBER_ME_COOKIE_KEY;
 import org.apache.commons.fileupload.FileItem;
 import org.apache.commons.fileupload.disk.DiskFileItemFactory;
@@ -81,7 +81,6 @@ import org.kohsuke.stapler.StaplerProxy;
 import org.kohsuke.stapler.StaplerRequest;
 import org.kohsuke.stapler.StaplerResponse;
 import org.kohsuke.stapler.export.Exported;
-import org.springframework.util.StringUtils;
 
 import javax.servlet.ServletContext;
 import javax.servlet.ServletException;
@@ -1920,19 +1919,12 @@ public final class Hudson extends View implements ItemGroup<TopLevelItem>, Node,
 
         String text = req.getParameter("script");
         if(text!=null) {
-            GroovyShell shell = new GroovyShell();
-
-            StringWriter out = new StringWriter();
-            PrintWriter pw = new PrintWriter(out);
-            shell.setVariable("out", pw);
             try {
-                Object output = shell.evaluate(text);
-                if(output!=null)
-                pw.println("Result: "+output);
-            } catch (Throwable t) {
-                t.printStackTrace(pw);
+                req.setAttribute("output",
+                RemotingDiagnostics.executeGroovy(text, MasterComputer.localChannel));
+            } catch (InterruptedException e) {
+                throw new ServletException(e);
             }
-            req.setAttribute("output",out);
         }
 
         req.getView(this,"_script.jelly").forward(req,rsp);
diff --git a/core/src/main/java/hudson/util/RemotingDiagnostics.java b/core/src/main/java/hudson/util/RemotingDiagnostics.java
new file mode 100644
index 0000000000..023b6bbed2
--- /dev/null
+++ b/core/src/main/java/hudson/util/RemotingDiagnostics.java
@@ -0,0 +1,94 @@
+package hudson.util;
+
+import groovy.lang.GroovyShell;
+import hudson.Functions;
+import hudson.remoting.Callable;
+import hudson.remoting.VirtualChannel;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.lang.management.ThreadInfo;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.TreeMap;
+
+/**
+ * Various remoting operations related to diagnostics.
+ *
+ * @author Kohsuke Kawaguchi
+ * @since 1.175
+ */
+public final class RemotingDiagnostics {
+    public static Map<Object,Object> getSystemProperties(VirtualChannel channel) throws IOException, InterruptedException {
+        if(channel==null)
+            return Collections.<Object,Object>singletonMap("N/A","N/A");
+        return channel.call(new GetSystemProperties());
+    }
+
+    private static final class GetSystemProperties implements Callable<Map<Object,Object>,RuntimeException> {
+        public Map<Object,Object> call() {
+            return new TreeMap<Object,Object>(System.getProperties());
+        }
+        private static final long serialVersionUID = 1L;
+    }
+
+    public static Map<String,String> getThreadDump(VirtualChannel channel) throws IOException, InterruptedException {
+        if(channel==null)
+            return Collections.singletonMap("N/A","N/A");
+        return channel.call(new GetThreadDump());
+    }
+
+    private static final class GetThreadDump implements Callable<Map<String,String>,RuntimeException> {
+        public Map<String,String> call() {
+            Map<String,String> r = new LinkedHashMap<String,String>();
+            try {
+                for (ThreadInfo ti : Functions.getThreadInfos())
+                    r.put(ti.getThreadName(),Functions.dumpThreadInfo(ti));
+            } catch (LinkageError _) {
+                // not in JDK6. fall back to JDK5
+                r.clear();
+                for (Map.Entry<Thread,StackTraceElement[]> t : Thread.getAllStackTraces().entrySet()) {
+                    StringBuffer buf = new StringBuffer();
+                    for (StackTraceElement e : t.getValue())
+                        buf.append(e).append('\n');
+                    r.put(t.getKey().getName(),buf.toString());
+                }
+            }
+            return r;
+        }
+        private static final long serialVersionUID = 1L;
+    }
+
+    /**
+     * Executes Groovy script remotely.
+     */
+    public static String executeGroovy(String script, VirtualChannel channel) throws IOException, InterruptedException {
+        return channel.call(new Script(script));
+    }
+
+    private static final class Script implements Callable<String,RuntimeException> {
+        private final String script;
+
+        private Script(String script) {
+            this.script = script;
+        }
+
+        public String call() throws RuntimeException {
+            GroovyShell shell = new GroovyShell();
+
+            StringWriter out = new StringWriter();
+            PrintWriter pw = new PrintWriter(out);
+            shell.setVariable("out", pw);
+            try {
+                Object output = shell.evaluate(script);
+                if(output!=null)
+                pw.println("Result: "+output);
+            } catch (Throwable t) {
+                t.printStackTrace(pw);
+            }
+            return out.toString();
+        }
+    }
+}
diff --git a/core/src/main/resources/hudson/maven/MavenProbeAction/_script.jelly b/core/src/main/resources/hudson/maven/MavenProbeAction/_script.jelly
new file mode 100644
index 0000000000..4b25e99660
--- /dev/null
+++ b/core/src/main/resources/hudson/maven/MavenProbeAction/_script.jelly
@@ -0,0 +1,8 @@
+<!--
+  Called from doScript() to display the execution result and the form.
+-->
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
+  <t:scriptConsole>
+    <pre>println System.getenv("PATH")</pre>
+  </t:scriptConsole>
+</j:jelly>
diff --git a/core/src/main/resources/hudson/maven/MavenProbeAction/envVars.jelly b/core/src/main/resources/hudson/maven/MavenProbeAction/envVars.jelly
new file mode 100644
index 0000000000..103f6ed3b2
--- /dev/null
+++ b/core/src/main/resources/hudson/maven/MavenProbeAction/envVars.jelly
@@ -0,0 +1,9 @@
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form" xmlns:test="/lib/test">
+  <l:layout permission="${app.ADMINISTER}">
+    <st:include page="sidepanel.jelly" />
+    <l:main-panel>
+      <h1>${%Environment Variables}</h1>
+      <t:propertyTable items="${it.envVars}" />
+    </l:main-panel>
+  </l:layout>
+</j:jelly>
diff --git a/core/src/main/resources/hudson/maven/MavenProbeAction/index.jelly b/core/src/main/resources/hudson/maven/MavenProbeAction/index.jelly
new file mode 100644
index 0000000000..9fceaefd63
--- /dev/null
+++ b/core/src/main/resources/hudson/maven/MavenProbeAction/index.jelly
@@ -0,0 +1,11 @@
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form" xmlns:test="/lib/test">
+  <l:layout>
+    <st:include page="sidepanel.jelly" />
+    <l:main-panel>
+      <div>
+        Obtain information about the running Maven process by clicking
+        links from the left. Often useful for trouble-shooting problems.
+      </div>
+    </l:main-panel>
+  </l:layout>
+</j:jelly>
diff --git a/core/src/main/resources/hudson/maven/MavenProbeAction/sidepanel.jelly b/core/src/main/resources/hudson/maven/MavenProbeAction/sidepanel.jelly
new file mode 100644
index 0000000000..c6645e5b42
--- /dev/null
+++ b/core/src/main/resources/hudson/maven/MavenProbeAction/sidepanel.jelly
@@ -0,0 +1,11 @@
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:s="/lib/form">
+  <l:header title="Maven Process for ${it.owner}" />
+  <l:side-panel>
+    <l:tasks>
+      <l:task icon="images/24x24/document.gif" href="systemProperties" title="${%System Properties}" />
+      <l:task icon="images/24x24/document.gif" href="envVars" title="${%Environment Variables}" />
+      <l:task icon="images/24x24/document.gif" href="threads" title="${%Thread Dump}" />
+      <l:task icon="images/24x24/notepad.gif" href="script" title="${%Script Console}" />
+    </l:tasks>
+  </l:side-panel>
+</j:jelly>
\ No newline at end of file
diff --git a/core/src/main/resources/hudson/maven/MavenProbeAction/systemProperties.jelly b/core/src/main/resources/hudson/maven/MavenProbeAction/systemProperties.jelly
new file mode 100644
index 0000000000..b6f1b30687
--- /dev/null
+++ b/core/src/main/resources/hudson/maven/MavenProbeAction/systemProperties.jelly
@@ -0,0 +1,10 @@
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form" xmlns:test="/lib/test">
+  <l:layout permission="${app.ADMINISTER}">
+    <st:include page="sidepanel.jelly" />
+    <l:main-panel>
+      <h1>${%System Properties}</h1>
+
+      <t:propertyTable items="${it.systemProperties}" />
+    </l:main-panel>
+  </l:layout>
+</j:jelly>
diff --git a/core/src/main/resources/hudson/maven/MavenProbeAction/threads.jelly b/core/src/main/resources/hudson/maven/MavenProbeAction/threads.jelly
new file mode 100644
index 0000000000..c1baa961b6
--- /dev/null
+++ b/core/src/main/resources/hudson/maven/MavenProbeAction/threads.jelly
@@ -0,0 +1,12 @@
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form" xmlns:test="/lib/test">
+  <l:layout permission="${app.ADMINISTER}">
+    <st:include page="sidepanel.jelly" />
+    <l:main-panel>
+      <h1>Thread Dump</h1>
+      <j:forEach var="t" items="${it.threadDump.entrySet()}">
+        <h2>${t.key}</h2>
+        <pre>${t.value}</pre>
+      </j:forEach>
+    </l:main-panel>
+  </l:layout>
+</j:jelly>
diff --git a/core/src/main/resources/hudson/maven/Messages.properties b/core/src/main/resources/hudson/maven/Messages.properties
index 16c4d99604..fc83d8ba08 100644
--- a/core/src/main/resources/hudson/maven/Messages.properties
+++ b/core/src/main/resources/hudson/maven/Messages.properties
@@ -1,3 +1,5 @@
 MavenModuleSet.DiplayName=Build a maven2 project (beta)
 
-MavenModule.Pronoun=Module
\ No newline at end of file
+MavenModule.Pronoun=Module
+
+MavenProbeAction.DisplayName=Monitor Maven Process
\ No newline at end of file
diff --git a/core/src/main/resources/hudson/model/Hudson/_script.jelly b/core/src/main/resources/hudson/model/Hudson/_script.jelly
index 4b26e5a851..2b3640d550 100644
--- a/core/src/main/resources/hudson/model/Hudson/_script.jelly
+++ b/core/src/main/resources/hudson/model/Hudson/_script.jelly
@@ -2,33 +2,7 @@
   Called from doScript() to display the execution result and the form.
 -->
 <j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
-  <l:layout>
-    <st:include page="sidepanel.jelly" />
-
-    <l:main-panel>
-      <h1>Script Console</h1>
-      <p>
-        Type in an arbitrary <a href="http://groovy.codehaus.org/Home">Groovy script</a> and
-        execute it on the server. Useful for trouble-shooting and diagnostics.
-        Use the 'println' command to see the output (if you use <tt>System.out</tt>,
-        it will go to the server's stdout, which is harder to see.) Example:
-      </p>
-      <pre>
-println(hudson.model.Hudson.instance.pluginManager.plugins)
-      </pre>
-      <form action="script" method="post">
-        <textarea id="script" name="script" style="width:100%; height:10em">${request.getParameter('script')}</textarea>
-        <div align="right">
-          <f:submit  value="Run"/>
-        </div>
-        <script>
-          $('script').focus();
-        </script>
-      </form>
-      <j:if test="${output!=null}">
-        <h2>Result</h2>
-        <pre><st:out value="${output}"/></pre>
-      </j:if>
-    </l:main-panel>
-  </l:layout>
+  <t:scriptConsole>
+    <pre>println(hudson.model.Hudson.instance.pluginManager.plugins)</pre>
+  </t:scriptConsole>
 </j:jelly>
diff --git a/core/src/main/resources/lib/hudson/scriptConsole.jelly b/core/src/main/resources/lib/hudson/scriptConsole.jelly
new file mode 100644
index 0000000000..fc2bca7b9d
--- /dev/null
+++ b/core/src/main/resources/lib/hudson/scriptConsole.jelly
@@ -0,0 +1,35 @@
+<!--
+  Called from doScript() to display the execution result and the form.
+-->
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
+  <l:layout>
+    <st:include page="sidepanel.jelly" />
+
+    <l:main-panel>
+      <h1>${%Script Console}</h1>
+
+      <p>
+        Type in an arbitrary <a href="http://groovy.codehaus.org/Home">Groovy script</a> and
+        execute it on the server. Useful for trouble-shooting and diagnostics.
+        Use the 'println' command to see the output (if you use <tt>System.out</tt>,
+        it will go to the server's stdout, which is harder to see.) Example:
+      </p>
+      <!-- this is where the example goes -->
+      <d:invokeBody />
+      
+      <form action="script" method="post">
+        <textarea id="script" name="script" style="width:100%; height:10em">${request.getParameter('script')}</textarea>
+        <div align="right">
+          <f:submit  value="Run"/>
+        </div>
+        <script>
+          $('script').focus();
+        </script>
+      </form>
+      <j:if test="${output!=null}">
+        <h2>${%Result}</h2>
+        <pre><st:out value="${output}"/></pre>
+      </j:if>
+    </l:main-panel>
+  </l:layout>
+</j:jelly>
-- 
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