aws sqs_AWS SQS和Spring JMS集成

aws sqs

Amazon WEB服务为我们提供了SQS消息传递服务。 sqs的java sdk与JMS兼容。

因此，可以将SQS与spring提供的JMS集成框架集成在一起，而不是将SQS用作简单的spring bean。

我将使用spring-boot和gradle。

gradle文件：

group 'com.gkatzioura.sqstesting'
version '1.0-SNAPSHOT'buildscript {repositories {mavenCentral()}dependencies {classpath("org.springframework.boot:spring-boot-gradle-plugin:1.2.7.RELEASE")}
}apply plugin: 'java'
apply plugin: 'idea'
apply plugin: 'spring-boot'sourceCompatibility = 1.8repositories {mavenCentral()
}dependencies {compile "org.springframework.boot:spring-boot-starter-thymeleaf"compile "com.amazonaws:aws-java-sdk:1.10.55"compile "org.springframework:spring-jms"compile "com.amazonaws:amazon-sqs-java-messaging-lib:1.0.0"compile 'org.slf4j:slf4j-api:1.6.6'compile 'ch.qos.logback:logback-classic:1.0.13'testCompile "junit:junit:4.11"
}

应用类别

package com.gkatzioura.sqstesting;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;/*** Created by gkatziourasemmanouil on 8/26/15.*/
@SpringBootApplication
public class Application {public static void main(String[] args) {SpringApplication.run(Application.class, args);}}

并应用yml文件

队列：
端点： http：// localhost：9324
名称：样本队列

我指定了一个本地主机端点，因为我使用了ElasticMq 。

SQSConfig类是一个配置类，以使SQS客户端作为spring bean可用。

package com.gkatzioura.sqstesting.config;import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.sqs.AmazonSQSClient;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;/*** Created by gkatziourasemmanouil on 25/02/16.*/
@Configuration
public class SQSConfig {@Value("${queue.endpoint}")private String endpoint;@Value("${queue.name}")private String queueName;@Beanpublic AmazonSQSClient createSQSClient() {AmazonSQSClient amazonSQSClient = new AmazonSQSClient(new BasicAWSCredentials("",""));amazonSQSClient.setEndpoint(endpoint);amazonSQSClient.createQueue(queueName);return amazonSQSClient;}}

SQSListener是实现JMS MessageListener接口的侦听器类。

package com.gkatzioura.sqstesting.listeners;import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.TextMessage;/*** Created by gkatziourasemmanouil on 25/02/16.*/
@Component
public class SQSListener implements MessageListener {private static final Logger LOGGER = LoggerFactory.getLogger(SQSListener.class);public void onMessage(Message message) {TextMessage textMessage = (TextMessage) message;try {LOGGER.info("Received message "+ textMessage.getText());} catch (JMSException e) {LOGGER.error("Error processing message ",e);}}
}

JMSSQSConfig类包含JmsTemplate和DefaultMessageListenerContainer的配置。通过JMSSQSConfig类，我们注册了JMS MessageListeners。

package com.gkatzioura.sqstesting.config;import com.amazon.sqs.javamessaging.SQSConnectionFactory;
import com.amazonaws.auth.*;
import com.gkatzioura.sqstesting.listeners.SQSListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.listener.DefaultMessageListenerContainer;/*** Created by gkatziourasemmanouil on 25/02/16.*/
@Configuration
public class JMSSQSConfig {@Value("${queue.endpoint}")private String endpoint;@Value("${queue.name}")private String queueName;@Autowiredprivate SQSListener sqsListener;@Beanpublic DefaultMessageListenerContainer jmsListenerContainer() {SQSConnectionFactory sqsConnectionFactory = SQSConnectionFactory.builder().withAWSCredentialsProvider(new DefaultAWSCredentialsProviderChain()).withEndpoint(endpoint).withAWSCredentialsProvider(awsCredentialsProvider).withNumberOfMessagesToPrefetch(10).build();DefaultMessageListenerContainer dmlc = new DefaultMessageListenerContainer();dmlc.setConnectionFactory(sqsConnectionFactory);dmlc.setDestinationName(queueName);dmlc.setMessageListener(sqsListener);return dmlc;}@Beanpublic JmsTemplate createJMSTemplate() {SQSConnectionFactory sqsConnectionFactory = SQSConnectionFactory.builder().withAWSCredentialsProvider(awsCredentialsProvider).withEndpoint(endpoint).withNumberOfMessagesToPrefetch(10).build();JmsTemplate jmsTemplate = new JmsTemplate(sqsConnectionFactory);jmsTemplate.setDefaultDestinationName(queueName);jmsTemplate.setDeliveryPersistent(false);return jmsTemplate;}private final AWSCredentialsProvider awsCredentialsProvider = new AWSCredentialsProvider() {@Overridepublic AWSCredentials getCredentials() {return new BasicAWSCredentials("", "");}@Overridepublic void refresh() {}};}

MessageService是使用JMSTemplate以便将消息发送到队列的服务

package com.gkatzioura.sqstesting;import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.core.MessageCreator;
import org.springframework.stereotype.Service;import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;/*** Created by gkatziourasemmanouil on 28/02/16.*/
@Service
public class MessageService {@Autowiredprivate JmsTemplate jmsTemplate;@Value("${queue.name}")private String queueName;private static final Logger LOGGER = LoggerFactory.getLogger(MessageService.class);public void sendMessage(final String message) {jmsTemplate.send(queueName, new MessageCreator() {@Overridepublic Message createMessage(Session session) throws JMSException {return session.createTextMessage(message);}});}}

最后但并非最不重要的一点是添加了控制器。控制器将发布请求正文作为消息发送到队列。

package com.gkatzioura.sqstesting;import com.amazonaws.util.IOUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;/*** Created by gkatziourasemmanouil on 24/02/16.*/
@Controller
@RequestMapping("/main")
public class MainController {@Autowiredprivate MessageService messageService;@RequestMapping(value = "/write",method = RequestMethod.POST)public void write(HttpServletRequest servletRequest,HttpServletResponse servletResponse) throws IOException {InputStream inputStream = servletRequest.getInputStream();String message = IOUtils.toString(inputStream);messageService.sendMessage(message);}}