Adding a method to pass in taskName for new empty TaskExecution

Resolves #298

Added test and add param to javadoc

spring-cloud-task-core/src/main/java/org/springframework/cloud/task/repository/TaskRepository.java

@@ -70,6 +70,19 @@ public interface TaskRepository {
 	@Transactional
 	TaskExecution createTaskExecution(TaskExecution taskExecution);
 
+	/**
+	 * Creates an empty TaskExecution with just an id and name provided. This is intended to be
+	 * utilized in systems where the request of launching a task is separate from the
+	 * actual start of a task (the underlying system may need to deploy the task prior to
+	 * launching, etc).
+	 *
+	 * @param name task name to be associated with the task execution.
+	 *
+	 * @return the initial {@link TaskExecution}
+	 */
+	@Transactional
+	TaskExecution createTaskExecution(String name);
+
 	/**
 	 * Creates an empty TaskExecution with just an id provided. This is intended to be
 	 * utilized in systems where the request of launching a task is separate from the

spring-cloud-task-core/src/main/java/org/springframework/cloud/task/repository/support/SimpleTaskRepository.java

@@ -115,15 +115,20 @@ public class SimpleTaskRepository implements TaskRepository {
 	}
 
 	@Override
-	public TaskExecution createTaskExecution() {
+	public TaskExecution createTaskExecution(String name) {
 		initialize();
 		TaskExecution taskExecution =
-				taskExecutionDao.createTaskExecution(null, null,
+				taskExecutionDao.createTaskExecution(name, null,
 						Collections.<String>emptyList(), null);
 		logger.debug("Creating: " + taskExecution.toString());
 		return taskExecution;
 	}
 
+	@Override
+	public TaskExecution createTaskExecution() {
+		return createTaskExecution((String)null);
+	}
+
 	@Override
 	public TaskExecution startTaskExecution(long executionid, String taskName, Date startTime, List<String> arguments,
 			String externalExecutionId) {

spring-cloud-task-integration-tests/src/test/java/org/springframework/cloud/task/executionid/TaskStartTests.java

@@ -55,6 +55,7 @@ import org.springframework.jdbc.datasource.init.ResourceDatabasePopulator;
 import org.springframework.test.context.junit4.SpringRunner;
 import org.springframework.util.SocketUtils;
 
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
@@ -144,6 +145,23 @@ public class TaskStartTests {
 		assertEquals("return code should be 0", 0, taskExecutions.iterator().next().getExitCode().intValue());
 	}
 
+	@Test
+	public void testWithGeneratedTaskExecutionWithName() throws Exception {
+		final String TASK_EXECUTION_NAME = "PRE-EXECUTION-TEST-NAME";
+		taskRepository.createTaskExecution(TASK_EXECUTION_NAME);
+		assertEquals("Only one row is expected", 1, taskExplorer.getTaskExecutionCount());
+		assertEquals(TASK_EXECUTION_NAME, taskExplorer.getTaskExecution(1).getTaskName());
+
+		getTaskApplication(1).run(new String[0]);
+		assertTrue(waitForDBToBePopulated());
+
+		Page<TaskExecution> taskExecutions = taskExplorer.findAll(new PageRequest(0, 10));
+		TaskExecution te = taskExecutions.iterator().next();
+		assertEquals("Only one row is expected", 1, taskExecutions.getTotalElements());
+		assertEquals("return code should be 0", 0, taskExecutions.iterator().next().getExitCode().intValue());
+		assertEquals("batchEvents", taskExplorer.getTaskExecution(1).getTaskName());
+	}
+
 	@Test(expected = ApplicationContextException.class)
 	public void testWithNoTaskExecution() throws Exception {
 		getTaskApplication(55).run(new String[0]);