IN PROGRESS - issue BATCH-453: Killed batches cannot be restarted

http://jira.springframework.org/browse/BATCH-453

Added a new sample job: DatabaseShutdownFunctionalTests that uses the database to detect a stopped job.

spring-batch-samples/src/main/java/org/springframework/batch/sample/common/CompositeItemWriter.java

@@ -0,0 +1,29 @@
+package org.springframework.batch.sample.common;
+
+import org.springframework.batch.item.ClearFailedException;
+import org.springframework.batch.item.FlushFailedException;
+import org.springframework.batch.item.ItemWriter;
+
+public class CompositeItemWriter<T> implements ItemWriter<T> {
+
+    ItemWriter<T> itemWriter;
+
+    public CompositeItemWriter(ItemWriter<T> itemWriter) {
+      this.itemWriter = itemWriter;
+    }
+
+    public void write(T item) throws Exception {
+
+      //Add business logic here
+
+      itemWriter.write(item);
+    }
+
+    public void clear() throws ClearFailedException {
+      itemWriter.clear();
+    }
+
+    public void flush() throws FlushFailedException {
+      itemWriter.flush();
+    }
+}

spring-batch-samples/src/main/java/org/springframework/batch/sample/common/InfiniteLoopReader.java

@@ -0,0 +1,25 @@
+/**
+ * 
+ */
+package org.springframework.batch.sample.common;
+
+import org.springframework.batch.item.ItemReader;
+import org.springframework.batch.item.NoWorkFoundException;
+import org.springframework.batch.item.ParseException;
+import org.springframework.batch.item.UnexpectedInputException;
+
+/**
+ * ItemReader implementation that will continually return a new object.  It's generally
+ * useful for testing interruption.
+ * 
+ * @author Lucas Ward
+ *
+ */
+public class InfiniteLoopReader implements ItemReader<Object> {
+
+	public Object read() throws Exception, UnexpectedInputException,
+			NoWorkFoundException, ParseException {
+		return new Object();
+	}
+
+}

spring-batch-samples/src/main/java/org/springframework/batch/sample/common/InfiniteLoopWriter.java

@@ -14,15 +14,15 @@
  * limitations under the License.
  */
 
-package org.springframework.batch.sample.tasklet;
+package org.springframework.batch.sample.common;
+
+import java.util.List;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import org.springframework.batch.core.BatchStatus;
 import org.springframework.batch.core.StepExecution;
 import org.springframework.batch.core.listener.StepExecutionListenerSupport;
-import org.springframework.batch.core.step.tasklet.Tasklet;
-import org.springframework.batch.repeat.ExitStatus;
+import org.springframework.batch.item.ItemWriter;
 
 /**
  * Simple module implementation that will always return true to indicate that
@@ -32,39 +32,29 @@ import org.springframework.batch.repeat.ExitStatus;
  * @author Lucas Ward
  * 
  */
-public class InfiniteLoopTasklet extends StepExecutionListenerSupport implements Tasklet {
+public class InfiniteLoopWriter extends StepExecutionListenerSupport implements
+		ItemWriter<Object> {
 
 	private StepExecution stepExecution;
 	private int count = 0;
-	private static final Log logger = LogFactory.getLog(InfiniteLoopTasklet.class);
+	private static final Log logger = LogFactory
+			.getLog(InfiniteLoopWriter.class);
 
 	/**
 	 * 
 	 */
-	public InfiniteLoopTasklet() {
+	public InfiniteLoopWriter() {
 		super();
 	}
 
-	public ExitStatus execute() throws Exception {
-		while(!stepExecution.isTerminateOnly()) {
-			try {
-				Thread.sleep(500);
-			} catch (InterruptedException e) {
-				Thread.currentThread().interrupt();
-				throw new RuntimeException("Job interrupted.");
-			}
-			stepExecution.setItemCount(++count);
-			logger.info("Executing infinite loop, at count="+count);
+	public void write(List<? extends Object> items) throws Exception {
+		try {
+			Thread.sleep(500);
+		} catch (InterruptedException e) {
+			Thread.currentThread().interrupt();
+			throw new RuntimeException("Job interrupted.");
 		}
-		stepExecution.setStatus(BatchStatus.STOPPING);
-		return ExitStatus.FAILED;
+		stepExecution.setItemCount(++count);
+		logger.info("Executing infinite loop, at count=" + count);
 	}
-	
-	/* (non-Javadoc)
-	 * @see org.springframework.batch.core.listener.StepListenerSupport#beforeStep(org.springframework.batch.core.domain.StepExecution)
-	 */
-	public void beforeStep(StepExecution stepExecution) {
-		this.stepExecution = stepExecution;
-	}
-	
 }