Refactoring samples

Restructuring the samples repository
Add more docker support
Add acceptance tests for the apps
Adding sensor average processor sample
Remove aggregate samples

source-samples/jdbc-source/src/main/java/demo/JdbcSourceProperties.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2018 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 org.springframework.boot.context.properties.ConfigurationProperties;
+
+/**
+ * @author Soby Chacko
+ */
+@ConfigurationProperties("jdbc")
+public class JdbcSourceProperties {
+
+	/**
+	 * The query to use to select data.
+	 */
+	private String query;
+
+	/**
+	 * An SQL update statement to execute for marking polled messages as 'seen'.
+	 */
+	private String update;
+
+	/**
+	 * trigger delay for polling
+	 */
+	private long triggerDelay = 1L;
+
+	public String getQuery() {
+		return query;
+	}
+
+	public void setQuery(String query) {
+		this.query = query;
+	}
+
+	public long getTriggerDelay() {
+		return triggerDelay;
+	}
+
+	public void setTriggerDelay(long triggerDelay) {
+		this.triggerDelay = triggerDelay;
+	}
+
+	public String getUpdate() {
+		return update;
+	}
+
+	public void setUpdate(String update) {
+		this.update = update;
+	}
+
+}

source-samples/jdbc-source/src/main/java/demo/SampleJdbcSource.java

@@ -0,0 +1,118 @@
+/*
+ * Copyright 2018 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 org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.cloud.stream.annotation.EnableBinding;
+import org.springframework.cloud.stream.annotation.StreamListener;
+import org.springframework.cloud.stream.messaging.Sink;
+import org.springframework.cloud.stream.messaging.Source;
+import org.springframework.context.annotation.Bean;
+import org.springframework.core.io.ResourceLoader;
+import org.springframework.integration.core.MessageSource;
+import org.springframework.integration.dsl.IntegrationFlow;
+import org.springframework.integration.dsl.IntegrationFlowBuilder;
+import org.springframework.integration.dsl.IntegrationFlows;
+import org.springframework.integration.jdbc.JdbcPollingChannelAdapter;
+import org.springframework.integration.scheduling.PollerMetadata;
+import org.springframework.jdbc.datasource.init.DatabasePopulatorUtils;
+import org.springframework.jdbc.datasource.init.ResourceDatabasePopulator;
+import org.springframework.scheduling.support.PeriodicTrigger;
+
+import javax.annotation.PostConstruct;
+import javax.sql.DataSource;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * @author Soby Chacko
+ */
+@EnableBinding(Source.class)
+@SpringBootApplication
+@EnableConfigurationProperties({JdbcSourceProperties.class})
+public class SampleJdbcSource {
+
+	public static void main(String... args){
+		SpringApplication.run(SampleJdbcSource.class, args);
+	}
+
+	@Autowired
+	private JdbcSourceProperties properties;
+
+	@Autowired
+	private DataSource dataSource;
+
+	@Autowired
+	private ResourceLoader resourceLoader;
+
+	@Autowired
+	private Source source;
+
+	@Bean
+	public MessageSource<Object> jdbcMessageSource() {
+		JdbcPollingChannelAdapter jdbcPollingChannelAdapter =
+				new JdbcPollingChannelAdapter(this.dataSource, this.properties.getQuery());
+		jdbcPollingChannelAdapter.setUpdateSql(this.properties.getUpdate());
+		return jdbcPollingChannelAdapter;
+	}
+
+	@Bean
+	public IntegrationFlow pollingFlow() {
+		IntegrationFlowBuilder flowBuilder = IntegrationFlows.from(jdbcMessageSource());
+		flowBuilder.channel(this.source.output());
+		return flowBuilder.get();
+	}
+
+	@Bean(
+			name = {"defaultPoller", "org.springframework.integration.context.defaultPollerMetadata"}
+	)
+	public PollerMetadata defaultPoller() {
+		PollerMetadata pollerMetadata = new PollerMetadata();
+		PeriodicTrigger trigger = new PeriodicTrigger(this.properties.getTriggerDelay(), TimeUnit.SECONDS);
+		pollerMetadata.setTrigger(trigger);
+		pollerMetadata.setMaxMessagesPerPoll(1L);
+		return pollerMetadata;
+	}
+
+	//Following method populates the database with some test data
+	@PostConstruct
+	public void initializeData(){
+			ResourceDatabasePopulator populator = new ResourceDatabasePopulator();
+			populator.addScript(resourceLoader.getResource("classpath:sample-schema.sql"));
+			populator.setContinueOnError(true);
+			DatabasePopulatorUtils.execute(populator, dataSource);
+	}
+
+	//Following sink is used as a test consumer. It logs the data received through the consumer.
+	@EnableBinding(Sink.class)
+	static class TestSink {
+
+		private final Log logger = LogFactory.getLog(getClass());
+
+		@StreamListener(Sink.INPUT)
+		public void receive(List<Object> list) {
+			logger.info("Data received..." + list);
+			//System.out.println("Data received..." + list);
+		}
+	}
+
+}

source-samples/jdbc-source/src/main/resources/application.yml

@@ -0,0 +1,11 @@
+spring:
+  datasource:
+    url: jdbc:mariadb://localhost:3306/sample_mysql_db
+    username: root
+    password: pwd
+    driver-class-name: org.mariadb.jdbc.Driver
+jdbc:
+  query: select id, name, tag from test order by id
+  triggerDelay: 5
+spring.cloud.stream.bindings.output.destination: test-data
+spring.cloud.stream.bindings.input.destination: test-data

source-samples/jdbc-source/src/main/resources/sample-schema.sql

@@ -0,0 +1,9 @@
+DROP TABLE test;
+create table test(
+  id bigint,
+  name varchar (2000),
+  tag char(1)
+);
+insert into test values (1, 'Bob', NULL);
+insert into test values (2, 'Jane', NULL);
+insert into test values (3, 'John', NULL);

source-samples/jdbc-source/src/test/java/demo/ModuleApplicationTests.java

@@ -0,0 +1,33 @@
+/*
+ * 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 org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(
+		webEnvironment = SpringBootTest.WebEnvironment.NONE)
+public class ModuleApplicationTests {
+
+	@Test
+	public void contextLoads() {
+	}
+
+}

source-samples/jdbc-source/src/test/resources/application.properties

@@ -0,0 +1,4 @@
+spring.datasource.driver-class-name=org.h2.Driver
+spring.datasource.url=jdbc:h2:mem:db;DB_CLOSE_DELAY=-1
+spring.datasource.username=sa
+spring.datasource.password=sa