Plugin services model

docs/todo.txt

+DBeaver features usage model
 Data transfer DECIMAL(x,y) types convert.
 Extract non-visual part to a separate plugin (preferences + editors)
 RSV find/replace action

plugins/org.jkiss.dbeaver.core/plugin.xml

@@ -21,6 +21,7 @@
   -->
 
 <plugin>
+    <extension-point id="org.jkiss.dbeaver.pluginService" name="Plugin service" schema="schema/org.jkiss.dbeaver.pluginService.exsd"/>
     <extension-point id="org.jkiss.dbeaver.dataSourceProvider" name="DataSource provider" schema="schema/org.jkiss.dbeaver.dataSourceProvider.exsd"/>
     <extension-point id="org.jkiss.dbeaver.databaseEditor" name="Custom Entity Editor" schema="schema/org.jkiss.dbeaver.databaseEditor.exsd"/>
     <extension-point id="org.jkiss.dbeaver.dataTypeProvider" name="DataType provider" schema="schema/org.jkiss.dbeaver.dataTypeProvider.exsd"/>

plugins/org.jkiss.dbeaver.core/schema/org.jkiss.dbeaver.pluginService.exsd

+<?xml version='1.0' encoding='UTF-8'?>
+<!-- Schema file written by PDE -->
+<schema targetNamespace="org.jkiss.dbeaver.core" xmlns="http://www.w3.org/2001/XMLSchema">
+<annotation>
+      <appInfo>
+         <meta.schema plugin="org.jkiss.dbeaver.core" id="org.jkiss.dbeaver.pluginService" name="Plugin Service"/>
+      </appInfo>
+      <documentation>
+         Plugin Service
+      </documentation>
+   </annotation>
+
+   <element name="extension">
+      <annotation>
+         <appInfo>
+            <meta.element />
+         </appInfo>
+      </annotation>
+      <complexType>
+         <sequence>
+            <element ref="service" minOccurs="0" maxOccurs="unbounded"/>
+         </sequence>
+         <attribute name="point" type="string" use="required">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="class" type="string">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+            </annotation>
+         </attribute>
+      </complexType>
+   </element>
+
+   <element name="handler">
+      <complexType>
+         <attribute name="id" type="string">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="label" type="string">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+               <appInfo>
+                  <meta.attribute translatable="true"/>
+               </appInfo>
+            </annotation>
+         </attribute>
+         <attribute name="description" type="string">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+               <appInfo>
+                  <meta.attribute translatable="true"/>
+               </appInfo>
+            </annotation>
+         </attribute>
+         <attribute name="type" type="string" use="required">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="secured" type="boolean">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="handlerClass" type="string">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+               <appInfo>
+                  <meta.attribute kind="java" basedOn=":org.jkiss.dbeaver.model.net.DBWNetworkHandler"/>
+               </appInfo>
+            </annotation>
+         </attribute>
+         <attribute name="uiClass" type="string">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+               <appInfo>
+                  <meta.attribute kind="java" basedOn=":org.jkiss.dbeaver.ui.IObjectPropertyConfigurator"/>
+               </appInfo>
+            </annotation>
+         </attribute>
+      </complexType>
+   </element>
+
+   <annotation>
+      <appInfo>
+         <meta.section type="since"/>
+      </appInfo>
+      <documentation>
+         [Enter the first release in which this extension point appears.]
+      </documentation>
+   </annotation>
+
+   <annotation>
+      <appInfo>
+         <meta.section type="examples"/>
+      </appInfo>
+      <documentation>
+         [Enter extension point usage example here.]
+      </documentation>
+   </annotation>
+
+   <annotation>
+      <appInfo>
+         <meta.section type="apiinfo"/>
+      </appInfo>
+      <documentation>
+         [Enter API information here.]
+      </documentation>
+   </annotation>
+
+   <annotation>
+      <appInfo>
+         <meta.section type="implementation"/>
+      </appInfo>
+      <documentation>
+         [Enter information about supplied implementation of this extension point.]
+      </documentation>
+   </annotation>
+
+
+</schema>

plugins/org.jkiss.dbeaver.core/src/org/jkiss/dbeaver/core/DBeaverCore.java

@@ -24,6 +24,8 @@ import org.jkiss.code.NotNull;
 import org.jkiss.dbeaver.DBException;
 import org.jkiss.dbeaver.model.DBPApplication;
 import org.jkiss.dbeaver.model.DBPPreferenceStore;
+import org.jkiss.dbeaver.registry.PluginServiceRegistry;
+import org.jkiss.dbeaver.runtime.IPluginService;
 import org.jkiss.dbeaver.runtime.net.GlobalProxyAuthenticator;
 import org.jkiss.dbeaver.runtime.net.GlobalProxySelector;
 import org.jkiss.dbeaver.model.navigator.DBNModel;
@@ -67,6 +69,8 @@ public class DBeaverCore implements DBPApplication {
     private QMLogFileWriter qmLogWriter;
     private ProjectRegistry projectRegistry;
 
+    private final List<IPluginService> activatedServices = new ArrayList<IPluginService>();
+
     private static boolean disposed = false;
 
     public static DBeaverCore getInstance()
@@ -156,8 +160,6 @@ public class DBeaverCore implements DBPApplication {
 
         this.localSystem = new OSDescriptor(Platform.getOS(), Platform.getOSArch());
 
-        IExtensionRegistry extensionRegistry = Platform.getExtensionRegistry();
-
         this.queryManager = new QMControllerImpl();
         this.qmLogWriter = new QMLogFileWriter();
         this.queryManager.registerMetaListener(qmLogWriter);
@@ -168,7 +170,6 @@ public class DBeaverCore implements DBPApplication {
 
         // Init project registry
         this.projectRegistry = new ProjectRegistry(workspace);
-        this.projectRegistry.loadExtensions(extensionRegistry);
 
         // Projects registry
         initializeProjects();
@@ -176,6 +177,16 @@ public class DBeaverCore implements DBPApplication {
         // Navigator model
         this.navigatorModel = new DBNModel();
         this.navigatorModel.initialize();
+
+        // Activate plugin services
+        for (IPluginService pluginService : PluginServiceRegistry.getInstance().getServices()) {
+            try {
+                pluginService.activateService();
+                activatedServices.add(pluginService);
+            } catch (Exception e) {
+                log.error("Error activating plugin service", e);
+            }
+        }
     }
 
     private void initializeProjects()
@@ -219,6 +230,16 @@ public class DBeaverCore implements DBPApplication {
 
         DBeaverCore.setClosing(true);
 
+        // Deactivate plugin services
+        for (IPluginService pluginService : activatedServices) {
+            try {
+                pluginService.deactivateService();
+            } catch (Exception e) {
+                log.error("Error deactivating plugin service", e);
+            }
+        }
+        activatedServices.clear();
+
         // Dispose navigator model first
         // It is a part of UI
         if (this.navigatorModel != null) {

plugins/org.jkiss.dbeaver.core/src/org/jkiss/dbeaver/registry/PluginServiceRegistry.java

+/*
+ * DBeaver - Universal Database Manager
+ * Copyright (C) 2010-2015 Serge Rieder (serge@jkiss.org)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (version 2)
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+package org.jkiss.dbeaver.registry;
+
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.IExtensionRegistry;
+import org.eclipse.core.runtime.Platform;
+import org.jkiss.dbeaver.DBException;
+import org.jkiss.dbeaver.runtime.IPluginService;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class PluginServiceRegistry
+{
+    public static final String EXTENSION_ID = "org.jkiss.dbeaver.pluginService"; //$NON-NLS-1$
+
+    private static PluginServiceRegistry instance = null;
+
+    private class ServiceDescriptor extends AbstractDescriptor {
+
+        private final ObjectType type;
+
+        protected ServiceDescriptor(IConfigurationElement config) {
+            super(config);
+            type = new ObjectType(config.getAttribute(RegistryConstants.ATTR_CLASS));
+        }
+    }
+
+    public synchronized static PluginServiceRegistry getInstance()
+    {
+        if (instance == null) {
+            instance = new PluginServiceRegistry(Platform.getExtensionRegistry());
+        }
+        return instance;
+    }
+
+    private final List<IPluginService> services = new ArrayList<IPluginService>();
+
+    private PluginServiceRegistry(IExtensionRegistry registry)
+    {
+        IConfigurationElement[] extElements = registry.getConfigurationElementsFor(EXTENSION_ID);
+        for (IConfigurationElement ext : extElements) {
+            ServiceDescriptor serviceDescriptor = new ServiceDescriptor(ext);
+            try {
+                IPluginService pluginService = serviceDescriptor.type.createInstance(IPluginService.class);
+                services.add(pluginService);
+            } catch (DBException e) {
+                ServiceDescriptor.log.error("Can't create plugin service", e);
+            }
+        }
+    }
+
+    public List<IPluginService> getServices()
+    {
+        return services;
+    }
+    
+}

plugins/org.jkiss.dbeaver.core/src/org/jkiss/dbeaver/registry/ProjectRegistry.java

@@ -56,6 +56,7 @@ public class ProjectRegistry {
     public ProjectRegistry(IWorkspace workspace)
     {
         this.workspace = workspace;
+        loadExtensions(Platform.getExtensionRegistry());
     }
 
     public void loadExtensions(IExtensionRegistry registry)

plugins/org.jkiss.dbeaver.core/src/org/jkiss/dbeaver/runtime/IPluginService.java

+/*
+ * DBeaver - Universal Database Manager
+ * Copyright (C) 2010-2015 Serge Rieder (serge@jkiss.org)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (version 2)
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+package org.jkiss.dbeaver.runtime;
+
+/**
+ * Plugin service.
+ * Activated/deactivated by DBeaver core on startup/shutdown.
+ */
+public interface IPluginService {
+
+    void activateService();
+
+    void deactivateService();
+
+}
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