Upgrade to Spring Batch 3.0.1

Due to a mistake in Spring Batch 3.0.0 it has been necessary to
introduce a breaking API change (the addition of
BatchConfigurer.getJobExplorer()) in the 3.0.1 release. This commit
updates Boot to use 3.0.1 and modifies the Batch auto-configuration
and associated tests to implement the new method.

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/batch/BasicBatchConfigurer.java

@@ -23,6 +23,8 @@ import javax.sql.DataSource;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.batch.core.configuration.annotation.BatchConfigurer;
+import org.springframework.batch.core.explore.JobExplorer;
+import org.springframework.batch.core.explore.support.JobExplorerFactoryBean;
 import org.springframework.batch.core.launch.JobLauncher;
 import org.springframework.batch.core.launch.support.SimpleJobLauncher;
 import org.springframework.batch.core.repository.JobRepository;
@@ -36,6 +38,7 @@ import org.springframework.transaction.PlatformTransactionManager;
  * Basic {@link BatchConfigurer} implementation.
  *
  * @author Dave Syer
+ * @author Andy Wilkinson
  */
 @Component
 public class BasicBatchConfigurer implements BatchConfigurer {
@@ -52,6 +55,8 @@ public class BasicBatchConfigurer implements BatchConfigurer {
 
 	private JobLauncher jobLauncher;
 
+	private JobExplorer jobExplorer;
+
 	/**
 	 * Create a new {@link BasicBatchConfigurer} instance.
 	 * @param dataSource the underlying data source
@@ -86,18 +91,31 @@ public class BasicBatchConfigurer implements BatchConfigurer {
 		return this.jobLauncher;
 	}
 
+	@Override
+	public JobExplorer getJobExplorer() throws Exception {
+		return this.jobExplorer;
+	}
+
 	@PostConstruct
 	public void initialize() {
 		try {
 			this.transactionManager = createTransactionManager();
 			this.jobRepository = createJobRepository();
 			this.jobLauncher = createJobLauncher();
+			this.jobExplorer = createJobExplorer();
 		}
 		catch (Exception ex) {
 			throw new IllegalStateException("Unable to initialize Spring Batch", ex);
 		}
 	}
 
+	private JobExplorer createJobExplorer() throws Exception {
+		JobExplorerFactoryBean jobExplorerFactoryBean = new JobExplorerFactoryBean();
+		jobExplorerFactoryBean.setDataSource(this.dataSource);
+		jobExplorerFactoryBean.afterPropertiesSet();
+		return jobExplorerFactoryBean.getObject();
+	}
+
 	private JobLauncher createJobLauncher() throws Exception {
 		SimpleJobLauncher jobLauncher = new SimpleJobLauncher();
 		jobLauncher.setJobRepository(getJobRepository());

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/batch/BatchAutoConfigurationTests.java

@@ -248,8 +248,8 @@ public class BatchAutoConfigurationTests {
 			return launcher;
 		}
 
-		@Bean
-		public JobExplorer jobExplorer() throws Exception {
+		@Override
+		public JobExplorer getJobExplorer() throws Exception {
 			MapJobExplorerFactoryBean explorer = new MapJobExplorerFactoryBean(
 					this.factory);
 			explorer.afterPropertiesSet();

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/batch/JobLauncherCommandLineRunnerTests.java

@@ -39,7 +39,6 @@ import org.springframework.batch.core.step.tasklet.Tasklet;
 import org.springframework.batch.repeat.RepeatStatus;
 import org.springframework.batch.support.transaction.ResourcelessTransactionManager;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
-import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.task.SyncTaskExecutor;
 import org.springframework.transaction.PlatformTransactionManager;
@@ -177,8 +176,8 @@ public class JobLauncherCommandLineRunnerTests {
 			return launcher;
 		}
 
-		@Bean
-		public JobExplorer jobExplorer() throws Exception {
+		@Override
+		public JobExplorer getJobExplorer() throws Exception {
 			return new MapJobExplorerFactoryBean(this.jobRepositoryFactory).getObject();
 		}
 	}

spring-boot-dependencies/pom.xml

@@ -98,7 +98,7 @@
 		<spock.version>0.7-groovy-2.0</spock.version>
 		<spring.version>4.0.5.RELEASE</spring.version>
 		<spring-amqp.version>1.3.5.RELEASE</spring-amqp.version>
-		<spring-batch.version>3.0.0.RELEASE</spring-batch.version>
+		<spring-batch.version>3.0.1.RELEASE</spring-batch.version>
 		<spring-data-releasetrain.version>Dijkstra-SR1</spring-data-releasetrain.version>
 		<spring-hateoas.version>0.14.0.RELEASE</spring-hateoas.version>
 		<spring-integration.version>4.0.2.RELEASE</spring-integration.version>