Add listener to persist relationship between job and task

This introduces a listener that stores the association between a Spring
Batch job and the task it was executed within.

Resolves spring-cloud/spring-cloud-task#46

Merge Changes based on code review.

spring-cloud-task-samples/batch-job/src/main/java/demo/BatchJobApplication.java

@@ -0,0 +1,16 @@
+package demo;
+
+import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.task.configuration.EnableTask;
+
+@SpringBootApplication
+@EnableTask
+@EnableBatchProcessing
+public class BatchJobApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(BatchJobApplication.class, args);
+	}
+}

spring-cloud-task-samples/batch-job/src/main/java/demo/configuration/JobConfiguration.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2016 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 demo.configuration;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+import org.springframework.batch.core.Job;
+import org.springframework.batch.core.StepContribution;
+import org.springframework.batch.core.configuration.annotation.JobBuilderFactory;
+import org.springframework.batch.core.configuration.annotation.StepBuilderFactory;
+import org.springframework.batch.core.scope.context.ChunkContext;
+import org.springframework.batch.core.step.tasklet.Tasklet;
+import org.springframework.batch.repeat.RepeatStatus;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * @author Michael Minella
+ */
+@Configuration
+public class JobConfiguration {
+
+	private static final Log logger = LogFactory.getLog(JobConfiguration.class);
+
+	@Autowired
+	public JobBuilderFactory jobBuilderFactory;
+
+	@Autowired
+	public StepBuilderFactory stepBuilderFactory;
+
+	@Bean
+	public Job job1() {
+		return jobBuilderFactory.get("job1")
+				.start(stepBuilderFactory.get("job1step1")
+					.tasklet(new Tasklet() {
+						@Override
+						public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {
+							logger.info("Job1 was run");
+							return RepeatStatus.FINISHED;
+						}
+					})
+					.build())
+				.build();
+	}
+
+	@Bean
+	public Job job2() {
+		return jobBuilderFactory.get("job2")
+				.start(stepBuilderFactory.get("job2step1")
+					.tasklet(new Tasklet() {
+						@Override
+						public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {
+							logger.info("Job2 was run");
+							return RepeatStatus.FINISHED;
+						}
+					})
+					.build())
+				.build();
+	}
+}

spring-cloud-task-samples/batch-job/src/main/resources/application.properties

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+spring.application.name=Demo Batch Job Task

spring-cloud-task-samples/batch-job/src/test/java/demo/BatchJobApplicationTests.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2015 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 demo;
+
+import static junit.framework.Assert.assertEquals;
+import static junit.framework.Assert.assertTrue;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.test.OutputCapture;
+
+/**
+ * Verifies that the Task Application outputs the correct task log entries.
+ *
+ * @author Michael Minella
+ */
+public class BatchJobApplicationTests {
+
+	@Rule
+	public OutputCapture outputCapture = new OutputCapture();
+
+	@Test
+	public void testTimeStampApp() throws Exception {
+		final String JOB_RUN_MESSAGE = " was run";
+		final String CREATE_TASK_MESSAGE = "Creating: TaskExecution{executionId=";
+		final String UPDATE_TASK_MESSAGE = "Updating: TaskExecution with executionId=";
+		final String JOB_ASSOCIATION_MESSAGE = "The job execution id ";
+
+		assertEquals(0, SpringApplication.exit(SpringApplication
+				.run(BatchJobApplication.class)));
+
+		String output = this.outputCapture.toString();
+		assertTrue("Unable to find the timestamp: " + output,
+				output.contains(JOB_RUN_MESSAGE));
+		assertTrue("Test results do not show create task message: " + output,
+				output.contains(CREATE_TASK_MESSAGE));
+		assertTrue("Test results do not show success message: " + output,
+				output.contains(UPDATE_TASK_MESSAGE));
+
+		int i = output.indexOf(JOB_ASSOCIATION_MESSAGE);
+
+		assertTrue("Test results do not show the listener message: " + output,
+				i > 0);
+
+		int j = output.indexOf(JOB_ASSOCIATION_MESSAGE, i + 1);
+
+		assertTrue("Test results do not show the listener message: " + output,
+				j > i);
+
+
+		String taskTitle = "Demo Batch Job Task";
+		Pattern pattern = Pattern.compile(taskTitle);
+		Matcher matcher = pattern.matcher(output);
+		int count = 0;
+		while (matcher.find()) {
+			count++;
+		}
+		assertEquals("The number of task titles did not match expected: ", 3, count);
+	}
+
+}

spring-cloud-task-samples/batch-job/src/test/resources/application.properties

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+#
+# Copyright 2016 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.
+#
+
+logging.level.root=DEBUG
+spring.application.name=Demo Batch Job Task