Supports CTR section of the dataflow.spring.io

resolves another part of #180

It is associated with PR https://github.com/spring-io/dataflow.spring.io/pull/188

transition-sample/src/main/java/io/spring/taskapp/TaskappApplication.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2020 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 io.spring.taskapp;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * Base application.
+ *
+ * @author Glenn Renfro
+ */
+@SpringBootApplication
+public class TaskappApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(TaskappApplication.class, args);
+	}
+
+}

transition-sample/src/main/java/io/spring/taskapp/configuration/TaskAppAnnotations.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2020 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 io.spring.taskapp.configuration;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cloud.task.listener.annotation.AfterTask;
+import org.springframework.cloud.task.repository.TaskExecution;
+
+/**
+ * Establishes the task annotation behavior for this application.
+ *
+ * @author Glenn Renfro
+ */
+public class TaskAppAnnotations {
+
+	@Autowired
+	TaskAppProperties taskAppProperties;
+
+	@AfterTask
+	public void afterMe(TaskExecution taskExecution) {
+		taskExecution.setExitMessage(taskAppProperties.getExitMessage());
+	}
+}

transition-sample/src/main/java/io/spring/taskapp/configuration/TaskAppConfiguration.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2020 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 io.spring.taskapp.configuration;
+
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.cloud.task.configuration.EnableTask;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * Establishes the configuration for this application.
+ *
+ * @author Glenn Renfro
+ */
+@EnableTask
+@Configuration
+@EnableConfigurationProperties(TaskAppProperties.class)
+public class TaskAppConfiguration {
+	@Bean
+	public CommandLineRunner commandLineRunner(TaskAppProperties props) {
+		return new CommandLineRunner() {
+			@Override
+			public void run(String... args) {
+				System.out.println("The exitMessage is " + props.getExitMessage());
+			}
+		};
+	}
+
+	@Bean
+	public TaskAppAnnotations annotations() {
+		return new TaskAppAnnotations();
+	}
+}

transition-sample/src/main/java/io/spring/taskapp/configuration/TaskAppProperties.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2020 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 io.spring.taskapp.configuration;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+/**
+ * Establishes the properties for this application.
+ *
+ * @author Glenn Renfro
+ */
+@ConfigurationProperties("taskapp")
+public class TaskAppProperties {
+	private String exitMessage;
+
+	public String getExitMessage() {
+		return exitMessage;
+	}
+
+	public void setExitMessage(String exitMessage) {
+		this.exitMessage = exitMessage;
+	}
+}

transition-sample/src/main/resources/application.properties

@@ -0,0 +1 @@
+logging.level.org.springframework.cloud.task=DEBUG

transition-sample/src/test/java/io/spring/taskapp/TaskappApplicationTests.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2020 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 io.spring.taskapp;
+
+import org.junit.Rule;
+import org.junit.Test;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.test.system.OutputCaptureRule;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class TaskappApplicationTests {
+
+	@Rule
+	public OutputCaptureRule outputCapture = new OutputCaptureRule();
+
+	@Test
+	public void contextLoads() {
+		String[] args = {"--taskapp.exitMessage=FOO"};
+		SpringApplication.run(TaskappApplication.class, args);
+
+		String output = this.outputCapture.toString();
+		assertThat(output).contains(" exitMessage='FOO', errorMessage='null'");
+	}
+
+}