Provide TARGET_SAVED and TARGET_DELETED events

When building tools on top of PDE's target platform framework it's often necessary to be informed about state changes in targets. PDE already uses an IEventBroker to send "workspaceTargetChanged" events. This change is about sending two new events: TARGET_SAVED and TARGET_DELETED
eclipse-pde · Nov 10, 2024 · c5b22c3 · c5b22c3
1 parent 5cac9e2
commit c5b22c3
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Showing 9 changed files with 115 additions and 9 deletions.
diff --git a/ui/org.eclipse.pde.core/.settings/.api_filters b/ui/org.eclipse.pde.core/.settings/.api_filters
@@ -1,5 +1,27 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <component id="org.eclipse.pde.core" version="2">
+    <resource path="META-INF/MANIFEST.MF">
+        <filter id="926941240">
+            <message_arguments>
+                <message_argument value="3.20.0"/>
+                <message_argument value="3.19.0"/>
+            </message_arguments>
+        </filter>
+    </resource>
+    <resource path="src/org/eclipse/pde/core/target/TargetEvents.java" type="org.eclipse.pde.core.target.TargetEvents">
+        <filter id="336658481">
+            <message_arguments>
+                <message_argument value="org.eclipse.pde.core.target.TargetEvents"/>
+                <message_argument value="TOPIC_TARGET_DELETED"/>
+            </message_arguments>
+        </filter>
+        <filter id="336658481">
+            <message_arguments>
+                <message_argument value="org.eclipse.pde.core.target.TargetEvents"/>
+                <message_argument value="TOPIC_TARGET_SAVED"/>
+            </message_arguments>
+        </filter>
+    </resource>
     <resource path="src/org/eclipse/pde/internal/core/project/BundleProjectService.java" type="org.eclipse.pde.internal.core.project.BundleProjectService">
         <filter comment="Platform Team allows use of bundle importers for PDE import from source repository" id="640712815">
             <message_arguments>

diff --git a/ui/org.eclipse.pde.core/META-INF/MANIFEST.MF b/ui/org.eclipse.pde.core/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %name
 Bundle-SymbolicName: org.eclipse.pde.core; singleton:=true
-Bundle-Version: 3.19.100.qualifier
+Bundle-Version: 3.20.0.qualifier
 Bundle-Activator: org.eclipse.pde.internal.core.PDECore
 Bundle-Vendor: %provider-name
 Bundle-Localization: plugin
@@ -101,6 +101,7 @@ Import-Package: aQute.bnd.build;version="[4.4.0,5.0.0)",
  org.eclipse.equinox.internal.p2.publisher.eclipse,
  org.eclipse.equinox.p2.publisher,
  org.eclipse.equinox.p2.publisher.eclipse,
+ org.osgi.service.event;version="[1.4.0,2.0.0)";resolution:=optional,
  org.osgi.service.repository;version="[1.1.0,2.0.0)",
  org.osgi.util.promise;version="[1.3.0,2.0.0)"
 Require-Bundle: 

diff --git a/ui/org.eclipse.pde.core/src/org/eclipse/pde/core/target/TargetEvents.java b/ui/org.eclipse.pde.core/src/org/eclipse/pde/core/target/TargetEvents.java
@@ -12,28 +12,84 @@
  ********************************************************************************/
 package org.eclipse.pde.core.target;
 
+import org.eclipse.e4.core.services.events.IEventBroker;
+import org.osgi.service.event.Event;
+import org.osgi.service.event.EventHandler;
+
 /**
- * Target events and event topic definitions
+ * Target events and event topic definitions.
+ *
+ * <p>
+ * The following code is an example of to subscribe to the
+ * {@link #TOPIC_TARGET_SAVED} event:
+ * </p>
+ *
+ * <pre>
+ * EventHandler eventHandler = event -> {
+ * 	if (event.getProperty(IEventBroker.DATA) instanceof ITargetHandle handle) {
+ * 		// Work with the target handle...
+ * 	}
+ * };
+ * IEclipseContext context = EclipseContextFactory.getServiceContext(bundleContext);
+ * IEventBroker broker = context.get(IEventBroker.class);
+ * if (broker != null) {
+ * 	broker.subscribe(TargetEvents.TOPIC_TARGET_SAVED, eventHandler);
+ * 	// Do not forget to unsubscribe later!
+ * }
+ * </pre>
  *
+ * @see ITargetPlatformService
+ * @see IEventBroker#subscribe(String, EventHandler)
+ * @see IEventBroker#subscribe(String, String, EventHandler, boolean)
+ * @see IEventBroker#unsubscribe(EventHandler)
  * @since 3.13
  */
 public class TargetEvents {
 
 	/**
-	 * Base topic for all Target events
+	 * Base topic for all target events.
 	 */
 	public static final String TOPIC_BASE = "org/eclipse/pde/core/target/TargetEvents"; //$NON-NLS-1$
 
 	/**
-	 * Topic for all Target events
+	 * Topic for all target events.
 	 */
 	public static final String TOPIC_ALL = TOPIC_BASE + "/*"; //$NON-NLS-1$
 
 	/**
-	 * Sent when workspace target definition is changed
+	 * Sent when workspace target definition is changed.
+	 * <p>
+	 * The {@link IEventBroker#DATA data} {@link Event#getProperty(String) event
+	 * property} of events with this topic is the changed
+	 * {@link ITargetDefinition}.
+	 * </p>
 	 *
 	 * @see ITargetPlatformService#getWorkspaceTargetDefinition()
 	 */
 	public static final String TOPIC_WORKSPACE_TARGET_CHANGED = TOPIC_BASE + "/workspaceTargetChanged"; //$NON-NLS-1$
 
+	/**
+	 * Sent when a target is saved.
+	 * <p>
+	 * The {@link IEventBroker#DATA data} {@link Event#getProperty(String) event
+	 * property} of events with this topic is the saved {@link ITargetHandle}.
+	 * </p>
+	 *
+	 * @see ITargetPlatformService#saveTargetDefinition(ITargetDefinition)
+	 * @see IEventBroker
+	 * @since 3.20
+	 */
+	public static final String TOPIC_TARGET_SAVED = TOPIC_BASE + "/targetSaved"; //$NON-NLS-1$
+
+	/**
+	 * Sent when a target is deleted.
+	 * <p>
+	 * The {@link IEventBroker#DATA data} {@link Event#getProperty(String) event
+	 * property} of events with this topic is the deleted {@link ITargetHandle}.
+	 * </p>
+	 *
+	 * @see ITargetPlatformService#deleteTarget(ITargetHandle)
+	 * @since 3.20
+	 */
+	public static final String TOPIC_TARGET_DELETED = TOPIC_BASE + "/targetDeleted"; //$NON-NLS-1$
 }
diff --git a/ui/org.eclipse.pde.core/src/org/eclipse/pde/internal/core/target/AbstractTargetHandle.java b/ui/org.eclipse.pde.core/src/org/eclipse/pde/internal/core/target/AbstractTargetHandle.java
@@ -20,6 +20,7 @@
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.pde.core.target.ITargetDefinition;
 import org.eclipse.pde.core.target.ITargetHandle;
+import org.eclipse.pde.core.target.TargetEvents;
 
 /**
  * Common implementation of target handles.
@@ -53,11 +54,17 @@ public ITargetDefinition getTargetDefinition() throws CoreException {
 	 */
 	abstract void delete() throws CoreException;
 
+	public final void save(ITargetDefinition definition) throws CoreException {
+		doSave(definition);
+		TargetPlatformService service = (TargetPlatformService) TargetPlatformService.getDefault();
+		service.scheduleEvent(TargetEvents.TOPIC_TARGET_SAVED, definition.getHandle());
+	}
+
 	/**
 	 * Saves the definition to underlying storage.
 	 *
 	 * @param definition target to save
 	 * @throws CoreException on failure
 	 */
-	abstract void save(ITargetDefinition definition) throws CoreException;
+	abstract void doSave(ITargetDefinition definition) throws CoreException;
 }
diff --git a/...g.eclipse.pde.core/src/org/eclipse/pde/internal/core/target/ExternalFileTargetHandle.java b/...g.eclipse.pde.core/src/org/eclipse/pde/internal/core/target/ExternalFileTargetHandle.java
@@ -81,7 +81,7 @@ protected InputStream getInputStream() throws CoreException {
 
 
 	@Override
-	void save(ITargetDefinition definition) throws CoreException {
+	void doSave(ITargetDefinition definition) throws CoreException {
 		try (OutputStream stream = new BufferedOutputStream(new FileOutputStream(fFile))) {
 			((TargetDefinition) definition).write(stream);
 		} catch (IOException e) {

diff --git a/ui/org.eclipse.pde.core/src/org/eclipse/pde/internal/core/target/LocalTargetHandle.java b/ui/org.eclipse.pde.core/src/org/eclipse/pde/internal/core/target/LocalTargetHandle.java
@@ -193,7 +193,7 @@ protected OutputStream getOutputStream() throws CoreException {
 	}
 
 	@Override
-	void save(ITargetDefinition definition) throws CoreException {
+	void doSave(ITargetDefinition definition) throws CoreException {
 		try (OutputStream stream = getOutputStream()) {
 			((TargetDefinition) definition).write(stream);
 		} catch (IOException e) {

diff --git a/ui/org.eclipse.pde.core/src/org/eclipse/pde/internal/core/target/TargetPlatformService.java b/ui/org.eclipse.pde.core/src/org/eclipse/pde/internal/core/target/TargetPlatformService.java
@@ -126,6 +126,7 @@ public void deleteTarget(ITargetHandle handle) throws CoreException {
 		}
 		((AbstractTargetHandle) handle).delete();
 		TargetPlatformHelper.getTargetDefinitionMap().remove(handle);
+		scheduleEvent(TargetEvents.TOPIC_TARGET_DELETED, handle);
 	}
 
 	@Override
@@ -334,6 +335,10 @@ public void setWorkspaceTargetDefinition(ITargetDefinition target, boolean async
 		}
 	}
 
+	public static void scheduleEvent(String topic, Object data) {
+		notifyEvent(topic, data, true);
+	}
+
 	private static void notifyEvent(String topic, Object data, boolean asyncEvents) {
 		IEclipseContext context = EclipseContextFactory.getServiceContext(PDECore.getDefault().getBundleContext());
 		IEventBroker broker = context.get(IEventBroker.class);

diff --git a/....eclipse.pde.core/src/org/eclipse/pde/internal/core/target/WorkspaceFileTargetHandle.java b/....eclipse.pde.core/src/org/eclipse/pde/internal/core/target/WorkspaceFileTargetHandle.java
@@ -76,7 +76,7 @@ public String getMemento() throws CoreException {
 	}
 
 	@Override
-	public void save(ITargetDefinition definition) throws CoreException {
+	void doSave(ITargetDefinition definition) throws CoreException {
 		ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
 		((TargetDefinition) definition).write(outputStream);
 		ByteArrayInputStream stream = new ByteArrayInputStream(outputStream.toByteArray());

diff --git a/....eclipse.pde.ui/src/org/eclipse/pde/internal/ui/editor/targetdefinition/TargetEditor.java b/....eclipse.pde.ui/src/org/eclipse/pde/internal/ui/editor/targetdefinition/TargetEditor.java
@@ -65,6 +65,7 @@
 import org.eclipse.pde.internal.core.PDEPreferencesManager;
 import org.eclipse.pde.internal.core.target.P2TargetUtils;
 import org.eclipse.pde.internal.core.target.TargetDefinitionPersistenceHelper;
+import org.eclipse.pde.internal.core.target.TargetPlatformService;
 import org.eclipse.pde.internal.core.target.WorkspaceFileTargetHandle;
 import org.eclipse.pde.internal.ui.IHelpContextIds;
 import org.eclipse.pde.internal.ui.PDEPlugin;
@@ -175,6 +176,7 @@ protected void pageChange(int newPageIndex) {
 
 	@Override
 	public void doSave(IProgressMonitor monitor) {
+		ITargetHandle handle = fInputHandler.getTarget().getHandle();
 		fInputHandler.setSaving(true);
 		if (!isActiveTabTextualEditor()) {
 			markStale();
@@ -184,6 +186,9 @@ public void doSave(IProgressMonitor monitor) {
 		fDirty = false;
 		editorDirtyStateChanged();
 		fInputHandler.setSaving(false);
+
+		TargetPlatformService service = (TargetPlatformService) TargetPlatformService.getDefault();
+		service.scheduleEvent(TargetEvents.TOPIC_TARGET_SAVED, handle);
 	}
 
 	@Override
@@ -286,6 +291,16 @@ public void dispose() {
 		super.dispose();
 	}
 
+	@Override
+	public <T> T getAdapter(Class<T> adapter) {
+		if (adapter.equals(ITargetHandle.class)) {
+			ITargetDefinition target = getTarget();
+			if (target != null) {
+				return adapter.cast(target.getHandle());
+			}
+		}
+		return super.getAdapter(adapter);
+	}
 	/**
 	 * Returns the target model backing this editor
 	 * @return target model