an additional interface that custom message handlers may choose to implement. Implementors get callbacks when a build is starting and when a build has finished (allowing them to perform before and after build processing, like closing output files etc..).

bridge/src/org/aspectj/bridge/ILifecycleAware.java

@@ -0,0 +1,35 @@
+/* *******************************************************************
+ * Copyright (c) 2006 Contributors.
+ * All rights reserved. 
+ * This program and the accompanying materials are made available 
+ * under the terms of the Eclipse Public License v1.0 
+ * which accompanies this distribution and is available at 
+ * http://eclipse.org/legal/epl-v10.html 
+ *  
+ * Contributors: 
+ *   Adrian Colyer			Initial implementation
+ * ******************************************************************/
+package org.aspectj.bridge;
+
+/**
+ * Interface that can be implemented by MessageHandlers that need to 
+ * perform some additional processing when a build is starting and 
+ * when it has finished.
+ * 
+ * @author Adrian Colyer
+ * @since 1.5.1
+ */
+public interface ILifecycleAware {
+
+	/**
+	 * called when a build starts
+	 */
+	void buildStarting(boolean isIncremental);
+	
+	/**
+	 * called when a batch build finishes
+	 *
+	 */
+	void buildFinished(boolean wasIncremental);
+	
+}

org.aspectj.ajdt.core/src/org/aspectj/ajdt/internal/core/builder/AjBuildManager.java

@@ -52,6 +52,7 @@ import org.aspectj.asm.IProgramElement;
 import org.aspectj.asm.internal.ProgramElement;
 import org.aspectj.bridge.AbortException;
 import org.aspectj.bridge.CountingMessageHandler;
+import org.aspectj.bridge.ILifecycleAware;
 import org.aspectj.bridge.IMessage;
 import org.aspectj.bridge.IMessageHandler;
 import org.aspectj.bridge.IProgressListener;
@@ -172,6 +173,9 @@ public class AjBuildManager implements IOutputClassFileNameProvider,IBinarySourc
         boolean ret = true;
     	batchCompile = batch;
     	
+    	if (baseHandler instanceof ILifecycleAware) {
+    		((ILifecycleAware)baseHandler).buildStarting(!batch);
+    	}
     	int phase = batch ? CompilationAndWeavingContext.BATCH_BUILD : CompilationAndWeavingContext.INCREMENTAL_BUILD;
     	ContextToken ct = CompilationAndWeavingContext.enteringPhase(phase ,buildConfig);
         try {
@@ -311,6 +315,9 @@ public class AjBuildManager implements IOutputClassFileNameProvider,IBinarySourc
            	CompilationAndWeavingContext.leavingPhase(ct);
             
         } finally {
+        	if (baseHandler instanceof ILifecycleAware) {
+        		((ILifecycleAware)baseHandler).buildFinished(!batch);
+        	}
         	if (zos != null) {
         		closeOutputStream(buildConfig.getOutputJar());
         	}