Java tutorial
/* * Copyright 2009-2010 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.monitor; import static org.junit.Assert.assertEquals; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before; import org.junit.Test; import org.springframework.beans.factory.config.AutowireCapableBeanFactory; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.integration.Message; import org.springframework.integration.MessageChannel; import org.springframework.integration.MessageHandlingException; import org.springframework.integration.message.GenericMessage; public class MessageChannelsMonitorIntegrationTests { private static Log logger = LogFactory.getLog(MessageChannelsMonitorIntegrationTests.class); private MessageChannel channel; private Service service; private IntegrationMBeanExporter messageChannelsMonitor; public void setMessageHandlersMonitor(IntegrationMBeanExporter messageChannelsMonitor) { this.messageChannelsMonitor = messageChannelsMonitor; } public void setService(Service service) { this.service = service; } @Test public void testSendWithAnonymousHandler() throws Exception { doTest("anonymous-channel.xml", "anonymous"); } @Test public void testSendWithProxiedChannel() throws Exception { doTest("proxy-channel.xml", "anonymous"); } @Test public void testRates() throws Exception { ClassPathXmlApplicationContext context = createContext("anonymous-channel.xml", "anonymous"); try { int before = service.getCounter(); for (int i = 0; i < 50; i++) { channel.send(new GenericMessage<String>("bar")); Thread.sleep(20L); } assertEquals(before + 50, service.getCounter()); // The handler monitor is registered under the endpoint id (since it is explicit) int sends = messageChannelsMonitor.getChannelSendRate("" + channel).getCount(); assertEquals("No send statistics for input channel", 50, sends, 0.01); } finally { context.close(); } } @Test public void testErrors() throws Exception { ClassPathXmlApplicationContext context = createContext("anonymous-channel.xml", "anonymous"); try { int before = service.getCounter(); for (int i = 0; i < 5; i++) { channel.send(new GenericMessage<String>("bar")); Thread.sleep(20L); } try { channel.send(new GenericMessage<String>("fail")); } catch (MessageHandlingException e) { // ignore } for (int i = 0; i < 5; i++) { channel.send(new GenericMessage<String>("bar")); Thread.sleep(20L); } assertEquals(before + 10, service.getCounter()); // The handler monitor is registered under the endpoint id (since it is explicit) int sends = messageChannelsMonitor.getChannelSendRate("" + channel).getCount(); assertEquals("No send statistics for input channel", 11, sends, 0.01); int errors = messageChannelsMonitor.getChannelErrorRate("" + channel).getCount(); assertEquals("No error statistics for input channel", 1, errors, 0.01); } finally { context.close(); } } @Test public void testQueues() throws Exception { ClassPathXmlApplicationContext context = createContext("queue-channel.xml", "queue"); try { int before = service.getCounter(); for (int i = 0; i < 5; i++) { channel.send(new GenericMessage<String>("bar")); Thread.sleep(20L); } try { channel.send(new GenericMessage<String>("fail")); } catch (MessageHandlingException e) { // ignore } for (int i = 0; i < 5; i++) { channel.send(new GenericMessage<String>("bar")); Thread.sleep(20L); } assertEquals(before + 10, service.getCounter()); // The handler monitor is registered under the endpoint id (since it is explicit) int sends = messageChannelsMonitor.getChannelSendRate("" + channel).getCount(); assertEquals("No send statistics for input channel", 11, sends); int receives = messageChannelsMonitor.getChannelReceiveCount("" + channel); assertEquals("No send statistics for input channel", 11, receives); int errors = messageChannelsMonitor.getChannelErrorRate("" + channel).getCount(); assertEquals("Expect no errors for input channel (handler fails)", 0, errors); } finally { context.close(); } } private void doTest(String config, String channelName) throws Exception { ClassPathXmlApplicationContext context = createContext(config, channelName); try { int before = service.getCounter(); channel.send(new GenericMessage<String>("bar")); assertEquals(before + 1, service.getCounter()); // The handler monitor is registered under the endpoint id (since it is explicit) int sends = messageChannelsMonitor.getChannelSendRate("" + channel).getCount(); assertEquals("No statistics for input channel", 1, sends, 0.01); } finally { context.close(); } } private ClassPathXmlApplicationContext createContext(String config, String channelName) { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(config, getClass()); context.getAutowireCapableBeanFactory().autowireBeanProperties(this, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, false); channel = context.getBean(channelName, MessageChannel.class); return context; } public static class Service { private int counter; public void execute(String input) { if ("fail".equals(input)) { throw new RuntimeException("Planned"); } counter++; } public int getCounter() { return counter; } } @Aspect public static class ChannelInterceptor { @Before("execution(* *..MessageChannel+.send(*)) && args(input)") public void around(Message<?> input) { logger.debug("Handling: " + input); } } }