INT-1477 restructuring samples repo to have basic, intermediate, advancedand applications directories

intermediate/async-gateway/src/main/java/org/springframework/integration/samples/async/gateway/MathService.java

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+/*
+ * Copyright 2002-2010 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.integration.samples.async.gateway;
+
+import java.util.Random;
+
+/**
+ * @author Oleg Zhurakousky
+ *
+ */
+public class MathService {
+	private final Random random = new Random();
+	
+	public int multiplyByTwo(int i) throws Exception{
+		long sleep = random.nextInt(10) * 500;
+		Thread.sleep(sleep);
+		return i*2;
+	}
+}

intermediate/async-gateway/src/main/java/org/springframework/integration/samples/async/gateway/MathServiceGateway.java

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+/*
+ * Copyright 2002-2010 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.integration.samples.async.gateway;
+
+import java.util.concurrent.Future;
+
+/**
+ * @author Oleg Zhurakousky
+ *
+ */
+public interface MathServiceGateway {
+
+	Future<Integer> multiplyByTwo(int i);
+}

intermediate/async-gateway/src/main/resources/META-INF/spring/integration/math-service-config.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
+		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
+		http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration-2.0.xsd
+		http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd"
+	xmlns:context="http://www.springframework.org/schema/context"
+	xmlns:int="http://www.springframework.org/schema/integration"
+	xmlns:task="http://www.springframework.org/schema/task">
+
+	<int:gateway id="mathService" 
+	             service-interface="org.springframework.integration.samples.async.gateway.MathServiceGateway"
+	             default-request-channel="requestChannel"/>
+	             
+	<int:channel id="requestChannel">
+		<int:queue/>
+	</int:channel>
+	
+	<int:filter input-channel="requestChannel" output-channel="calculatingChannel" expression="payload &gt; 100">
+		<int:poller fixed-rate="100" max-messages-per-poll="10" task-executor="executor"/>
+	</int:filter>
+	
+	<int:channel id="calculatingChannel" >
+		<int:dispatcher task-executor="executor"/>
+	</int:channel>
+	
+	<int:service-activator input-channel="calculatingChannel">
+		<bean class="org.springframework.integration.samples.async.gateway.MathService"/>
+	</int:service-activator>
+	
+	<task:executor id="executor" pool-size="10"/>
+</beans>

intermediate/async-gateway/src/test/java/org/springframework/integration/samples/async/gateway/AsyncGatewayTest.java

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+/*
+ * Copyright 2002-2010 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.integration.samples.async.gateway;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Random;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+import org.apache.log4j.Logger;
+import org.junit.Test;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.support.FileSystemXmlApplicationContext;
+/**
+ * @author Oleg Zhurakousky
+ *
+ */
+public class AsyncGatewayTest {
+	private static Logger logger = Logger.getLogger(AsyncGatewayTest.class);
+	private static ExecutorService executor = Executors.newFixedThreadPool(100);
+	private static int timeout = 20;
+	
+	@Test
+	public void testAsyncGateway() throws Exception{
+		ApplicationContext ac = new FileSystemXmlApplicationContext("src/main/resources/META-INF/spring/integration/*.xml");
+		MathServiceGateway mathService = ac.getBean("mathService", MathServiceGateway.class);
+		Map<Integer, Future<Integer>> results = new HashMap<Integer, Future<Integer>>();
+		Random random = new Random();
+		for (int i = 0; i < 100; i++) {
+			int number = random.nextInt(200);
+			Future<Integer> result = mathService.multiplyByTwo(number);
+			results.put(number, result);
+		}
+		for (final Map.Entry<Integer, Future<Integer>> resultEntry : results.entrySet()) {
+			executor.execute(new Runnable() {
+				public void run() {			
+					int[] result = processFuture(resultEntry);
+					
+					if (result[1] == -1){
+						logger.info("Multiplying " + result[0] + " should be easy. You should be able to multiply any number < 100 by 2 in your head");
+					} else if (result[1] == -2){
+						logger.info("Multiplication of " + result[0] + " by 2 is can not be accomplished in " + timeout + " seconds");
+					} else {
+						logger.info("Result of multiplication of " + result[0] + " by 2 is " + result[1]);
+					}
+				}
+			});		
+		}
+		executor.shutdown();
+		executor.awaitTermination(60, TimeUnit.SECONDS);
+		logger.info("Finished");
+	}
+	
+	public static int[] processFuture(Map.Entry<Integer, Future<Integer>> resultEntry){
+		int originalNumber = resultEntry.getKey();
+		Future<Integer> result = resultEntry.getValue();
+		try {
+			int finalResult =  result.get(timeout, TimeUnit.SECONDS);
+			return new int[]{originalNumber, finalResult};
+		} catch (ExecutionException e) {
+			return new int[]{originalNumber, -1};
+		} catch (TimeoutException tex){
+			return new int[]{originalNumber, -2};
+		} catch (Exception ex){
+			System.out.println();
+			// ignore
+		}
+		return null;
+	}
+}

intermediate/async-gateway/src/test/resources/log4j.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
+<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
+
+	<!-- Appenders -->
+	<appender name="console" class="org.apache.log4j.ConsoleAppender">
+		<param name="Target" value="System.out" />
+		<layout class="org.apache.log4j.PatternLayout">
+			<param name="ConversionPattern" value="%-5p: %c - %m%n" />
+		</layout>
+	</appender>
+	<logger name="org.springframework.integration">
+		<level value="warn" />
+	</logger>
+	
+	<logger name="org.springframework.integration.samples.async.gateway">
+		<level value="debug" />
+	</logger>
+
+	<!-- Root Logger -->
+	<root>
+		<priority value="warn" />
+		<appender-ref ref="console" />
+	</root>
+
+</log4j:configuration>