IN PROGRESS - issue BATCH-456: JobListener.afterJob() should be called regardless of success or failure

http://jira.springframework.org/browse/BATCH-456

added JobListener#onError(JobExecution, Throwable) called when job failed (not when interrupted)

spring-batch-core/src/main/java/org/springframework/batch/core/JobListener.java

@@ -37,4 +37,9 @@ public interface JobListener {
 	 * Callback after successful completion of a job.
 	 */
 	void afterJob(JobExecution jobExecution);
+	
+	/**
+	 * Callback on job failure.
+	 */
+	void onError(JobExecution jobExecution, Throwable e);
 }

spring-batch-core/src/main/java/org/springframework/batch/core/job/SimpleJob.java

@@ -133,6 +133,7 @@ public class SimpleJob extends AbstractJob {
 		}
 		catch (Throwable t) {
 			execution.setStatus(BatchStatus.FAILED);
+			listener.onError(execution, t);
 			rethrow(t);
 		}
 		finally {

spring-batch-core/src/main/java/org/springframework/batch/core/listener/CompositeJobListener.java

@@ -51,24 +51,26 @@ public class CompositeJobListener implements JobListener {
 		}
 	}
 
-	/* (non-Javadoc)
-	 * @see org.springframework.batch.core.domain.StepListener#close()
-	 */
 	public void afterJob(JobExecution jobExecution) {
-		for (Iterator iterator = listeners.iterator(); iterator.hasNext();) {
+		for (Iterator iterator = listeners.listIterator(); iterator.hasNext();) {
 			JobListener listener = (JobListener) iterator.next();
 			listener.afterJob(jobExecution);
 		}
 	}
 
-	/* (non-Javadoc)
-	 * @see org.springframework.batch.core.domain.StepListener#open(org.springframework.batch.core.domain.JobParameters)
-	 */
 	public void beforeJob(JobExecution jobExecution) {
-		for (Iterator iterator = listeners.iterator(); iterator.hasNext();) {
+		for (Iterator iterator = listeners.listIterator(); iterator.hasNext();) {
 			JobListener listener = (JobListener) iterator.next();
 			listener.beforeJob(jobExecution);
 		}
 	}
 
+	public void onError(JobExecution jobExecution, Throwable e) {
+		for (Iterator iterator = listeners.listIterator(); iterator.hasNext();) {
+			JobListener listener = (JobListener) iterator.next();
+			listener.onError(jobExecution, e);
+		}
+		
+	}
+
 }

spring-batch-core/src/main/java/org/springframework/batch/core/listener/JobListenerSupport.java

@@ -36,4 +36,9 @@ public class JobListenerSupport implements JobListener {
 	public void beforeJob(JobExecution jobExecution) {
 	}
 
+	public void onError(JobExecution jobExecution, Throwable e) {
+		// TODO Auto-generated method stub
+		
+	}
+
 }