Don't load BatchAutoConfiguration at all if there is no JobLauncher

Fixes gh-204

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

@@ -54,6 +54,7 @@ import org.springframework.util.StringUtils;
 @Configuration
 @ConditionalOnClass({ JobLauncher.class, DataSource.class, JdbcOperations.class })
 @AutoConfigureAfter(HibernateJpaAutoConfiguration.class)
+@ConditionalOnBean(JobLauncher.class)
 public class BatchAutoConfiguration {
 
 	@Value("${spring.batch.job.name:}")
@@ -70,7 +71,6 @@ public class BatchAutoConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean
-	@ConditionalOnBean(JobLauncher.class)
 	@ConditionalOnExpression("${spring.batch.job.enabled:true}")
 	public JobLauncherCommandLineRunner jobLauncherCommandLineRunner() {
 		JobLauncherCommandLineRunner runner = new JobLauncherCommandLineRunner();
@@ -82,7 +82,6 @@ public class BatchAutoConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean
-	@ConditionalOnBean(JobLauncher.class)
 	public ExitCodeGenerator jobExecutionExitCodeGenerator() {
 		return new JobExecutionExitCodeGenerator();
 	}

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

@@ -48,6 +48,7 @@ import org.springframework.boot.test.EnvironmentTestUtils;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
 import org.springframework.jdbc.BadSqlGrammarException;
 import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.transaction.PlatformTransactionManager;
@@ -89,6 +90,17 @@ public class BatchAutoConfigurationTests {
 				.queryForList("select * from BATCH_JOB_EXECUTION").size());
 	}
 
+	@Test
+	public void testNoBatchConfiguration() throws Exception {
+		this.context = new AnnotationConfigApplicationContext();
+		this.context.register(EmptyConfiguration.class, BatchAutoConfiguration.class,
+				EmbeddedDataSourceConfiguration.class,
+				PropertyPlaceholderAutoConfiguration.class);
+		this.context.refresh();
+		assertEquals(0, this.context.getBeanNamesForType(JobLauncher.class).length);
+		assertEquals(0, this.context.getBeanNamesForType(JobRepository.class).length);
+	}
+
 	@Test
 	public void testDefinesAndLaunchesJob() throws Exception {
 		this.context = new AnnotationConfigApplicationContext();
@@ -105,7 +117,8 @@ public class BatchAutoConfigurationTests {
 	@Test
 	public void testDisableLaunchesJob() throws Exception {
 		this.context = new AnnotationConfigApplicationContext();
-		EnvironmentTestUtils.addEnvironment(this.context, "spring.batch.job.enabled:false");
+		EnvironmentTestUtils.addEnvironment(this.context,
+				"spring.batch.job.enabled:false");
 		this.context.register(JobConfiguration.class, BatchAutoConfiguration.class,
 				EmbeddedDataSourceConfiguration.class,
 				PropertyPlaceholderAutoConfiguration.class);
@@ -117,7 +130,8 @@ public class BatchAutoConfigurationTests {
 	@Test
 	public void testDisableSchemaLoader() throws Exception {
 		this.context = new AnnotationConfigApplicationContext();
-		EnvironmentTestUtils.addEnvironment(this.context, "spring.datasource.name:batchtest",
+		EnvironmentTestUtils.addEnvironment(this.context,
+				"spring.datasource.name:batchtest",
 				"spring.batch.initializer.enabled:false");
 		this.context.register(TestConfiguration.class, BatchAutoConfiguration.class,
 				EmbeddedDataSourceConfiguration.class,
@@ -149,6 +163,10 @@ public class BatchAutoConfigurationTests {
 				new JobParameters()));
 	}
 
+	@Configuration
+	protected static class EmptyConfiguration {
+	}
+
 	@EnableBatchProcessing
 	@ComponentScan(basePackageClasses = City.class)
 	protected static class TestConfiguration {