RESOLVED - issue BATCH-1338: Allow segregation of jobs by type or origin

Added groupName and extension points in JobRegistryBeanPostProcessor and ClassPathXmlJobRegistry

spring-batch-core/src/main/java/org/springframework/batch/core/configuration/support/ApplicationContextJobFactory.java

@@ -32,14 +32,28 @@ public class ApplicationContextJobFactory extends AbstractGroupAwareJobFactory {
 	final ApplicationContextFactory applicationContextFactory;
 
 	/**
+	 * @param groupName the name of the group that the job belongs to
 	 * @param jobName the id of the {@link Job} in the application context to be
 	 * created
+	 * @param applicationContextFactory a factory for an application context
+	 * containing a job with the job name provided
 	 */
-	public ApplicationContextJobFactory(ApplicationContextFactory applicationContextFactory, String jobName) {
-		super(jobName);
+	public ApplicationContextJobFactory(String groupName, String jobName,
+			ApplicationContextFactory applicationContextFactory) {
+		super(groupName, jobName);
 		this.applicationContextFactory = applicationContextFactory;
 	}
 
+	/**
+	 * @param jobName the id of the {@link Job} in the application context to be
+	 * created
+	 * @param applicationContextFactory a factory for an application context
+	 * containing a job with the job name provided
+	 */
+	public ApplicationContextJobFactory(String jobName, ApplicationContextFactory applicationContextFactory) {
+		this(null, jobName, applicationContextFactory);
+	}
+
 	/**
 	 * Create an {@link ApplicationContext} from the factory provided and pull
 	 * out a bean with the name given during initialization.

spring-batch-core/src/main/java/org/springframework/batch/core/configuration/support/ClassPathXmlJobRegistry.java

@@ -44,7 +44,10 @@ import org.springframework.core.io.Resource;
  * 
  * @author Lucas Ward
  * @author Dave Syer
+ * 
  * @since 2.0
+ * @since 2.1 this class does not implement {@link JobRegistry}: it is a
+ * {@link ListableJobLocator}
  */
 public class ClassPathXmlJobRegistry implements ListableJobLocator, ApplicationContextAware, InitializingBean,
 		DisposableBean {
@@ -114,8 +117,9 @@ public class ClassPathXmlJobRegistry implements ListableJobLocator, ApplicationC
 
 			for (String name : names) {
 				logger.debug("Registering job: " + name + " from context: " + resource);
-				ApplicationContextJobFactory jobFactory = new ApplicationContextJobFactory(applicationContextFactory,
-						name);
+				String groupName = getGroupName(context, resource, name);
+				ApplicationContextJobFactory jobFactory = new ApplicationContextJobFactory(groupName, name,
+						applicationContextFactory);
 				jobRegistry.register(jobFactory);
 			}
 		}
@@ -126,6 +130,20 @@ public class ClassPathXmlJobRegistry implements ListableJobLocator, ApplicationC
 
 	}
 
+	/**
+	 * Determine a group name for the job to be registered. Default
+	 * implementation does nothing, but provides an extension point for
+	 * specialised subclasses.
+	 * 
+	 * @param context the application context containing the job
+	 * @param resource the resource that was used to create the context
+	 * @param jobName the jobName
+	 * @return a group name for the job (or null if not needed)
+	 */
+	protected String getGroupName(ApplicationContext context, Resource resource, String jobName) {
+		return null;
+	}
+
 	/**
 	 * Close the contexts that were created in {@link #afterPropertiesSet()}.
 	 * 

spring-batch-core/src/main/java/org/springframework/batch/core/configuration/support/JobRegistryBeanPostProcessor.java

@@ -24,28 +24,50 @@ import org.springframework.batch.core.configuration.JobLocator;
 import org.springframework.batch.core.configuration.JobRegistry;
 import org.springframework.beans.BeansException;
 import org.springframework.beans.FatalBeanException;
+import org.springframework.beans.factory.BeanFactory;
+import org.springframework.beans.factory.BeanFactoryAware;
 import org.springframework.beans.factory.DisposableBean;
 import org.springframework.beans.factory.InitializingBean;
+import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.config.BeanPostProcessor;
+import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.util.Assert;
 
 /**
- * A {@link BeanPostProcessor} that registers {@link Job} beans
- * with a {@link JobRegistry}. Include a bean of this type along
- * with your job configuration, and use the same
- * {@link JobRegistry} as a {@link JobLocator} when
- * you need to locate a {@link JobLocator} to launch.
+ * A {@link BeanPostProcessor} that registers {@link Job} beans with a
+ * {@link JobRegistry}. Include a bean of this type along with your job
+ * configuration, and use the same {@link JobRegistry} as a {@link JobLocator}
+ * when you need to locate a {@link Job} to launch.
  * 
  * @author Dave Syer
  * 
  */
-public class JobRegistryBeanPostProcessor implements BeanPostProcessor, InitializingBean, DisposableBean {
+public class JobRegistryBeanPostProcessor implements BeanPostProcessor, BeanFactoryAware, InitializingBean,
+		DisposableBean {
 
 	// It doesn't make sense for this to have a default value...
 	private JobRegistry jobRegistry = null;
 
 	private Collection<String> jobNames = new HashSet<String>();
 
+	private String groupName = null;
+
+	private DefaultListableBeanFactory beanFactory;
+
+	/**
+	 * The group name for jobs registered by this component. Optional (defaults
+	 * to null, which means that jobs are registered with their bean names).
+	 * Useful where there is a hierarchy of application contexts all
+	 * contributing to the same {@link JobRegistry}: child contexts can then
+	 * define an instance with a unique group name to avoid clashes between job
+	 * names.
+	 * 
+	 * @param groupName the groupName to set
+	 */
+	public void setGroupName(String groupName) {
+		this.groupName = groupName;
+	}
+
 	/**
 	 * Injection setter for {@link JobRegistry}.
 	 * 
@@ -55,6 +77,19 @@ public class JobRegistryBeanPostProcessor implements BeanPostProcessor, Initiali
 		this.jobRegistry = jobRegistry;
 	}
 
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see
+	 * org.springframework.beans.factory.BeanFactoryAware#setBeanFactory(org
+	 * .springframework.beans.factory.BeanFactory)
+	 */
+	public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
+		if (beanFactory instanceof DefaultListableBeanFactory) {
+			this.beanFactory = (DefaultListableBeanFactory) beanFactory;
+		}
+	}
+
 	/**
 	 * Make sure the registry is set before use.
 	 * 
@@ -65,8 +100,8 @@ public class JobRegistryBeanPostProcessor implements BeanPostProcessor, Initiali
 	}
 
 	/**
-	 * De-register all the {@link Job} instances that were
-	 * regsistered by this post processor.
+	 * De-register all the {@link Job} instances that were regsistered by this
+	 * post processor.
 	 * @see org.springframework.beans.factory.DisposableBean#destroy()
 	 */
 	public void destroy() throws Exception {
@@ -78,8 +113,7 @@ public class JobRegistryBeanPostProcessor implements BeanPostProcessor, Initiali
 
 	/**
 	 * If the bean is an instance of {@link Job} then register it.
-	 * @throws FatalBeanException if there is a
-	 * {@link DuplicateJobException}.
+	 * @throws FatalBeanException if there is a {@link DuplicateJobException}.
 	 * 
 	 * @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessAfterInitialization(java.lang.Object,
 	 * java.lang.String)
@@ -88,8 +122,13 @@ public class JobRegistryBeanPostProcessor implements BeanPostProcessor, Initiali
 		if (bean instanceof Job) {
 			Job job = (Job) bean;
 			try {
-				jobRegistry.register(new ReferenceJobFactory(job));
-				jobNames.add(job.getName());
+				String groupName = this.groupName;
+				if (beanFactory != null) {
+					groupName = getGroupName(beanFactory.getBeanDefinition(beanName), job);
+				}
+				ReferenceJobFactory jobFactory = new ReferenceJobFactory(groupName, job);
+				jobRegistry.register(jobFactory);
+				jobNames.add(jobFactory.getJobName());
 			}
 			catch (DuplicateJobException e) {
 				throw new FatalBeanException("Cannot register job configuration", e);
@@ -98,6 +137,19 @@ public class JobRegistryBeanPostProcessor implements BeanPostProcessor, Initiali
 		return bean;
 	}
 
+	/**
+	 * Determine a group name for the job to be registered. Default
+	 * implementation just returns the {@link #setGroupName(String) groupName}
+	 * configured. Provides an extension point for specialised subclasses.
+	 * 
+	 * @param beanDefinition the bean definition for the job
+	 * @param job the job
+	 * @return a group name for the job (or null if not needed)
+	 */
+	protected String getGroupName(BeanDefinition beanDefinition, Job job) {
+		return groupName;
+	}
+
 	/**
 	 * Do nothing.
 	 * 
@@ -107,5 +159,4 @@ public class JobRegistryBeanPostProcessor implements BeanPostProcessor, Initiali
 	public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
 		return bean;
 	}
-
 }

spring-batch-core/src/main/java/org/springframework/batch/core/configuration/support/ReferenceJobFactory.java

@@ -29,12 +29,20 @@ public class ReferenceJobFactory extends AbstractGroupAwareJobFactory {
 
 	private Job job;
 
+	/**
+	 * @param groupName the name of the group that this job belongs to
+	 * @param job the {@link Job} to return from {@link #createJob()}.
+	 */
+	public ReferenceJobFactory(String groupName, Job job) {
+		super(groupName, job.getName());
+		this.job = job;
+	}
+
 	/**
 	 * @param job the {@link Job} to return from {@link #createJob()}.
 	 */
 	public ReferenceJobFactory(Job job) {
-		super(job.getName());
-		this.job = job;
+		this(null, job);
 	}
 
 	/**

spring-batch-core/src/main/java/org/springframework/batch/core/launch/support/JobRegistryBackgroundJobRunner.java

@@ -129,7 +129,7 @@ public class JobRegistryBackgroundJobRunner {
 					factory.setApplicationContext(parentContext);
 					factory.setPath(path);
 					logger.info("Registering Job definition: " + names[k]);
-					registry.register(new ApplicationContextJobFactory(factory, names[k]));
+					registry.register(new ApplicationContextJobFactory(names[k], factory));
 				}
 
 			}

spring-batch-core/src/test/java/org/springframework/batch/core/configuration/support/ApplicationContextJobFactoryTests.java

@@ -1,5 +1,6 @@
 package org.springframework.batch.core.configuration.support;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 
 import org.junit.Test;
@@ -9,20 +10,25 @@ import org.springframework.context.support.StaticApplicationContext;
 
 public class ApplicationContextJobFactoryTests {
 
-	private AbstractGroupAwareJobFactory factory = new ApplicationContextJobFactory(
-			new StubApplicationContextFactory(), "job");
-
 	@Test
 	public void testFactoryContext() throws Exception {
+		ApplicationContextJobFactory factory = new ApplicationContextJobFactory("job",
+				new StubApplicationContextFactory());
 		assertNotNull(factory.createJob());
 	}
 
-	private static class StubApplicationContextFactory implements
-			ApplicationContextFactory {
+	@Test
+	public void testGroupName() throws Exception {
+		ApplicationContextJobFactory factory = new ApplicationContextJobFactory("jobs", "job",
+				new StubApplicationContextFactory());
+		assertEquals("jobs$job", factory.getJobName());
+	}
+
+	private static class StubApplicationContextFactory implements ApplicationContextFactory {
 		public ConfigurableApplicationContext createApplicationContext() {
 			StaticApplicationContext context = new StaticApplicationContext();
 			context.registerSingleton("job", JobSupport.class);
-			return context ;
+			return context;
 		}
 
 	}

spring-batch-core/src/test/java/org/springframework/batch/core/configuration/support/JobRegistryBeanPostProcessorTests.java

@@ -15,10 +15,14 @@
  */
 package org.springframework.batch.core.configuration.support;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
 import java.util.Collection;
 
-import junit.framework.TestCase;
-
+import org.junit.Test;
 import org.springframework.batch.core.configuration.DuplicateJobException;
 import org.springframework.batch.core.job.JobSupport;
 import org.springframework.batch.core.launch.NoSuchJobException;
@@ -29,11 +33,12 @@ import org.springframework.context.support.ClassPathXmlApplicationContext;
  * @author Dave Syer
  * 
  */
-public class JobRegistryBeanPostProcessorTests extends TestCase {
+public class JobRegistryBeanPostProcessorTests {
 
 	private JobRegistryBeanPostProcessor processor = new JobRegistryBeanPostProcessor();
 
-	public void testInitialization() throws Exception {
+	@Test
+	public void testInitializationFails() throws Exception {
 		try {
 			processor.afterPropertiesSet();
 			fail("Expected IllegalArgumentException");
@@ -44,33 +49,48 @@ public class JobRegistryBeanPostProcessorTests extends TestCase {
 		}
 	}
 
+	@Test
 	public void testBeforeInitialization() throws Exception {
 		// should be a no-op
-		assertEquals("foo", processor.postProcessAfterInitialization("foo", "bar"));
+		assertEquals("foo", processor.postProcessBeforeInitialization("foo", "bar"));
 	}
 
+	@Test
 	public void testAfterInitializationWithWrongType() throws Exception {
 		// should be a no-op
 		assertEquals("foo", processor.postProcessAfterInitialization("foo", "bar"));
 	}
 
+	@Test
 	public void testAfterInitializationWithCorrectType() throws Exception {
 		MapJobRegistry registry = new MapJobRegistry();
 		processor.setJobRegistry(registry);
-		JobSupport configuration = new JobSupport();
-		configuration.setBeanName("foo");
-		assertEquals(configuration, processor.postProcessAfterInitialization(configuration, "bar"));
-		assertEquals(configuration.getName(), registry.getJob("foo").getName());
+		JobSupport job = new JobSupport();
+		job.setBeanName("foo");
+		assertEquals(job, processor.postProcessAfterInitialization(job, "bar"));
+		assertEquals(job.getName(), registry.getJob("foo").getName());
 	}
 
+	@Test
+	public void testAfterInitializationWithGroupName() throws Exception {
+		MapJobRegistry registry = new MapJobRegistry();
+		processor.setJobRegistry(registry);
+		processor.setGroupName("jobs");
+		JobSupport job = new JobSupport();
+		job.setBeanName("foo");
+		assertEquals(job, processor.postProcessAfterInitialization(job, "bar"));
+		assertEquals("[jobs$foo]", registry.getJobNames().toString());
+	}
+
+	@Test
 	public void testAfterInitializationWithDuplicate() throws Exception {
 		MapJobRegistry registry = new MapJobRegistry();
 		processor.setJobRegistry(registry);
-		JobSupport configuration = new JobSupport();
-		configuration.setBeanName("foo");
-		processor.postProcessAfterInitialization(configuration, "bar");
+		JobSupport job = new JobSupport();
+		job.setBeanName("foo");
+		processor.postProcessAfterInitialization(job, "bar");
 		try {
-			processor.postProcessAfterInitialization(configuration, "spam");
+			processor.postProcessAfterInitialization(job, "spam");
 			fail("Expected FatalBeanException");
 		}
 		catch (FatalBeanException e) {
@@ -79,12 +99,13 @@ public class JobRegistryBeanPostProcessorTests extends TestCase {
 		}
 	}
 
+	@Test
 	public void testUnregisterOnDestroy() throws Exception {
 		MapJobRegistry registry = new MapJobRegistry();
 		processor.setJobRegistry(registry);
-		JobSupport configuration = new JobSupport();
-		configuration.setBeanName("foo");
-		assertEquals(configuration, processor.postProcessAfterInitialization(configuration, "bar"));
+		JobSupport job = new JobSupport();
+		job.setBeanName("foo");
+		assertEquals(job, processor.postProcessAfterInitialization(job, "bar"));
 		processor.destroy();
 		try {
 			assertEquals(null, registry.getJob("foo"));
@@ -95,6 +116,7 @@ public class JobRegistryBeanPostProcessorTests extends TestCase {
 		}
 	}
 
+	@Test
 	public void testExecutionWithApplicationContext() throws Exception {
 		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("test-context.xml", getClass());
 		MapJobRegistry registry = (MapJobRegistry) context.getBean("registry");
@@ -117,4 +139,5 @@ public class JobRegistryBeanPostProcessorTests extends TestCase {
 		assertEquals(context.getBean("test-job-with-concrete-parent-and-name"), registry.getJob("oof"));
 		assertEquals(context.getBean("test-job-with-concrete-parent-and-bean-name"), registry.getJob("rab"));
 	}
+
 }

spring-batch-core/src/test/java/org/springframework/batch/core/configuration/support/ReferenceJobFactoryTests.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2006-2007 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.configuration.support;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+import org.springframework.batch.core.job.JobSupport;
+
+/**
+ * @author Dave Syer
+ *
+ */
+public class ReferenceJobFactoryTests {
+	
+	@Test
+	public void testGroupName() throws Exception {
+		ReferenceJobFactory factory = new ReferenceJobFactory("jobs", new JobSupport("foo"));
+		assertEquals("jobs$foo", factory.getJobName());
+	}
+
+}