SCT-23 Added sample apps for Spring Cloud Task

* Timestamp  Demonstrates a Spring boot/task application as a single java file.
* HelloWorld Demonstrates a Spring boot/task application using java configuration.

resolves spring-cloud/spring-cloud-task#23

spring-cloud-task-samples/pom.xml

@@ -2,14 +2,26 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0"
 		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-	<parent>
-		<artifactId>spring-cloud-task-parent</artifactId>
-		<groupId>org.springframework.cloud</groupId>
-		<version>1.0.0.BUILD-SNAPSHOT</version>
-	</parent>
+
 	<modelVersion>4.0.0</modelVersion>
 
 	<artifactId>spring-cloud-task-samples</artifactId>
+	<packaging>pom</packaging>
+
+	<parent>
+		<groupId>org.springframework.cloud</groupId>
+		<artifactId>spring-cloud-task-parent</artifactId>
+		<version>1.0.0.BUILD-SNAPSHOT</version>
+	</parent>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<java.version>1.7</java.version>
+	</properties>
+
+	<modules>
+		<module>timestamp</module>
+	</modules>
 
 	<build>
 		<pluginManagement>
@@ -30,5 +42,4 @@
 			</plugins>
 		</pluginManagement>
 	</build>
-
 </project>

spring-cloud-task-samples/timestamp/README.adoc

@@ -0,0 +1,26 @@
+= Timestamp Job
+
+This is a Spring Cloud Task application that logs a timestamp.
+
+== Requirements:
+
+* Java 7 or Above
+
+== Classes:
+
+* TaskApplication - the Spring Boot Main Application
+* TimestampTask - the module that writes the log entry as Spring Task
+
+== Build:
+
+[source,shell,indent=2]
+----
+$ mvn clean package
+----
+
+== Run:
+
+[source,shell,indent=2]
+----
+$ java -jar target/timestamp-task-1.0.0.BUILD-SNAPSHOT.jar
+----

spring-cloud-task-samples/timestamp/pom.xml

@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>org.springframework.cloud</groupId>
+	<artifactId>timestamp-task</artifactId>
+	<packaging>jar</packaging>
+	<name>timestamp-task</name>
+	<version>1.0.0.BUILD-SNAPSHOT</version>
+	<description>Spring Cloud Timestamp Task</description>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>1.3.0.RELEASE</version>
+	</parent>
+
+	<properties>
+		<start-class>org.springframework.cloud.task.timestamp.TaskApplication</start-class>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-task-core</artifactId>
+			<version>1.0.0.BUILD-SNAPSHOT</version>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-jdbc</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.hsqldb</groupId>
+			<artifactId>hsqldb</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-configuration-processor</artifactId>
+			<optional>true</optional>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

spring-cloud-task-samples/timestamp/src/main/java/org/springframework/cloud/task/timestamp/TaskApplication.java

@@ -0,0 +1,67 @@
+/*
+ * 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 org.springframework.cloud.task.timestamp;
+
+
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.cloud.task.annotation.EnableTask;
+import org.springframework.cloud.task.annotation.Task;
+import org.springframework.context.annotation.Bean;
+
+/**
+ * Spring Boot Application that has tasks enabled.
+ */
+@SpringBootApplication
+@EnableTask
+@EnableConfigurationProperties({ TimestampTaskProperties.class })
+public class TaskApplication {
+
+	@Bean
+	public TimestampTask timeStampTask() {
+		return new TimestampTask();
+	}
+
+	public static void main(String[] args) {
+		SpringApplication.run(TaskApplication.class);
+	}
+
+	/**
+	 * A commandline runner that prints a timestamp and is annotated with @Task.
+	 */
+	@Task("Demo Timestamp Task")
+	public class TimestampTask implements CommandLineRunner {
+		private final org.slf4j.Logger logger = LoggerFactory.getLogger(TimestampTask.class);
+
+		@Autowired
+		private TimestampTaskProperties config;
+
+		@Override
+		public void run(String... strings) throws Exception {
+			DateFormat dateFormat = new SimpleDateFormat(config.getFormat());
+			logger.info(dateFormat.format(new Date()));
+		}
+	}
+}

spring-cloud-task-samples/timestamp/src/main/java/org/springframework/cloud/task/timestamp/TimestampTaskProperties.java

@@ -0,0 +1,41 @@
+/*
+ * 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 org.springframework.cloud.task.timestamp;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.util.Assert;
+
+/**
+ * @author Glenn Renfro
+ */
+@ConfigurationProperties
+public class TimestampTaskProperties {
+
+	/**
+	 * The timestamp format, "yyyy-MM-dd HH:mm:ss.SSS" by default.
+	 */
+	private String format = "yyyy-MM-dd HH:mm:ss.SSS";
+
+	public String getFormat() {
+		Assert.hasText(format, "format must not be empty nor null");
+		return format;
+	}
+
+	public void setFormat(String format) {
+		this.format = format;
+	}
+}

spring-cloud-task-samples/timestamp/src/test/java/org/springframework/cloud/task/timestamp/TaskApplicationTests.java

@@ -0,0 +1,68 @@
+/*
+ * 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 org.springframework.cloud.task.timestamp;
+
+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 Glenn Renfro
+ */
+public class TaskApplicationTests {
+
+	@Rule
+	public OutputCapture outputCapture = new OutputCapture();
+
+	@Test
+	public void testTimeStampApp() throws Exception {
+		final String TEST_DATE_DOTS = ".......";
+		final String CREATE_TASK_MESSAGE = "Creating: TaskExecution{executionId='";
+		final String UPDATE_TASK_MESSAGE = "Updating: TaskExecution{executionId='";
+		String[] args = { "--format=yyyy" + TEST_DATE_DOTS };
+
+		assertEquals(0, SpringApplication.exit(SpringApplication
+				.run(TaskApplication.class, args)));
+
+		String output = this.outputCapture.toString();
+		assertTrue("Unable to find the timestamp: " + output,
+				output.contains(TEST_DATE_DOTS));
+		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));
+
+		String taskTitle = "Demo Timestamp 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: ", 2, count);
+	}
+
+}

spring-cloud-task-samples/timestamp/src/test/java/org/springframework/cloud/task/timestamp/TimestampTaskPropertiesTests.java

@@ -0,0 +1,68 @@
+/*
+ * 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 org.springframework.cloud.task.timestamp;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.boot.test.EnvironmentTestUtils;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * @author Glenn Renfro
+ */
+public class TimestampTaskPropertiesTests {
+
+	@Test(expected = IllegalArgumentException.class)
+	public void testEmptyFormat() {
+		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
+		EnvironmentTestUtils.addEnvironment(context, "format:");
+		context.register(Conf.class);
+		context.refresh();
+		TimestampTaskProperties properties = context.getBean(TimestampTaskProperties.class);
+		properties.getFormat();
+	}
+
+	@Test
+	public void testFormatDefault() {
+		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
+		context.register(Conf.class);
+		context.refresh();
+		TimestampTaskProperties properties = context.getBean(TimestampTaskProperties.class);
+		assertEquals("result does not match default format.", "yyyy-MM-dd HH:mm:ss.SSS",
+				properties.getFormat());
+	}
+
+	@Test
+	public void testFormatSet() {
+		final String FORMAT = "yyyy";
+		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
+		context.register(Conf.class);
+		context.refresh();
+		TimestampTaskProperties properties = context.getBean(TimestampTaskProperties.class);
+		properties.setFormat(FORMAT);
+		assertEquals("result does not match established format.", FORMAT,
+				properties.getFormat());
+	}
+
+	@Configuration
+	@EnableConfigurationProperties(TimestampTaskProperties.class)
+	static class Conf {
+	}
+}