diff --git a/spring-batch-core/src/main/java/org/springframework/batch/core/step/NoItemsProcessedDetector.java b/spring-batch-core/src/main/java/org/springframework/batch/core/step/NoItemsProcessedDetector.java new file mode 100644 index 000000000..59f6b72c2 --- /dev/null +++ b/spring-batch-core/src/main/java/org/springframework/batch/core/step/NoItemsProcessedDetector.java @@ -0,0 +1,43 @@ +/* + * Copyright 2002-2007 the original author or authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.springframework.batch.core.step; + +import org.springframework.batch.core.StepExecution; +import org.springframework.batch.core.listener.StepExecutionListenerSupport; +import org.springframework.batch.repeat.ExitStatus; + +/** + * Fails the step if no items have been processed ( item count is 0). + * + * @author Robert Kasanicky + */ +public class NoItemsProcessedDetector extends StepExecutionListenerSupport { + + public ExitStatus afterStep(StepExecution stepExecution) { + if (stepExecution.getItemCount().intValue() == 0) { + throw new NoItemsProcessedException("Step has not processed any items"); + } + return stepExecution.getExitStatus(); + } + + private static class NoItemsProcessedException extends RuntimeException { + public NoItemsProcessedException(String message) { + super(message); + } + } + +} diff --git a/spring-batch-core/src/test/java/org/springframework/batch/core/step/NoItemsProcessedDetectorTests.java b/spring-batch-core/src/test/java/org/springframework/batch/core/step/NoItemsProcessedDetectorTests.java new file mode 100644 index 000000000..a5937540e --- /dev/null +++ b/spring-batch-core/src/test/java/org/springframework/batch/core/step/NoItemsProcessedDetectorTests.java @@ -0,0 +1,45 @@ +/* + * Copyright 2002-2007 the original author or authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.springframework.batch.core.step; + +import junit.framework.TestCase; +import org.springframework.batch.core.JobExecution; +import org.springframework.batch.core.JobInstance; +import org.springframework.batch.core.JobParameters; +import org.springframework.batch.core.StepExecution; + +public class NoItemsProcessedDetectorTests extends TestCase { + + private NoItemsProcessedDetector tested = new NoItemsProcessedDetector(); + + /** + * If item count is zero exception is thrown + */ + public void testAfterStep() { + StepExecution stepExecution = new StepExecution("NoProcessingStep", + new JobExecution( + new JobInstance(new Long(1), new JobParameters(), "NoProcessingJob"))); + + stepExecution.setItemCount(0); + + try { + tested.afterStep(stepExecution); + fail(); + } catch (RuntimeException e) { + assertEquals("Step has not processed any items", e.getMessage()); + } + } +}