(三) RabbitMQ實戰教程(面向Java開發人員)之Spring整合RabbitMQ
Spring整合RabbitMQ
Spring AMQP是對AMQP協議的抽象和封裝,從官方網站上得知它是由兩個專案組成的(spring-amqp和spring-rabbit)。在使用Spring整合RabbitMQ時我們主要關注三個核心介面(MessageListenerContainer、RabbitAdmin以及RabbitTemplate)
RabbitAdmin: 用於宣告交換機 佇列 繫結等
RabbitTemplate: 用於RabbitMQ訊息的傳送和接收
MessageListenerContainer: 監聽容器 為訊息入隊提供非同步處理
使用Spring整合RabbitMQ需要匯入如下依賴
<dependency>
<groupId>org.springframework.amqp</groupId>
<artifactId>spring-rabbit</artifactId>
<version>2.0.2.RELEASE</version>
</dependency>
Spring AMQP手動宣告
1.建立生產者配置類 將RabbitAdmin、RabbitTemplate納入Spring管理
@Configuration
public class SpringAMQPProducerConfig {
@Bean
public ConnectionFactory connectionFactory() {
com.rabbitmq.client.ConnectionFactory connectionFactory = new com.rabbitmq.client.ConnectionFactory();
// 配置連線資訊
connectionFactory.setHost("192.168.56.128");
connectionFactory.setPort(5672 );
connectionFactory.setVirtualHost("/");
connectionFactory.setUsername("roberto");
connectionFactory.setPassword("roberto");
// 網路異常自動連線恢復
connectionFactory.setAutomaticRecoveryEnabled(true);
// 每10秒嘗試重試連線一次
connectionFactory.setNetworkRecoveryInterval(10000);
// 設定ConnectionFactory屬性資訊
Map<String, Object> connectionFactoryPropertiesMap = new HashMap();
connectionFactoryPropertiesMap.put("principal", "RobertoHuang");
connectionFactoryPropertiesMap.put("description", "RGP訂單系統V2.0");
connectionFactoryPropertiesMap.put("emailAddress", "[email protected]");
connectionFactory.setClientProperties(connectionFactoryPropertiesMap);
CachingConnectionFactory cachingConnectionFactory = new CachingConnectionFactory(connectionFactory);
return cachingConnectionFactory;
}
@Bean
public RabbitAdmin rabbitAdmin(ConnectionFactory connectionFactory) {
return new RabbitAdmin(connectionFactory);
}
@Bean
public RabbitTemplate rabbitTemplate(ConnectionFactory connectionFactory) {
return new RabbitTemplate(connectionFactory);
}
}
2.建立生產者啟動類
@ComponentScan(basePackages = "roberto.growth.process.rabbitmq.spring.amqp.manual.declare.producer")
public class ProducerApplication {
public static void main(String[] args) {
AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ProducerApplication.class);
RabbitAdmin rabbitAdmin = context.getBean(RabbitAdmin.class);
RabbitTemplate rabbitTemplate = context.getBean(RabbitTemplate.class);
// 宣告交換機
rabbitAdmin.declareExchange(new DirectExchange("roberto.order", true, false, new HashMap<>()));
// 宣告訊息 (訊息體, 訊息屬性)
MessageProperties messageProperties = new MessageProperties();
messageProperties.setDeliveryMode(MessageDeliveryMode.PERSISTENT);
messageProperties.setContentType("UTF-8");
Message message = new Message("訂單資訊".getBytes(), messageProperties);
// 釋出訊息 (交換機名, Routing key, 訊息);
// 釋出訊息還可以使用rabbitTemplate.convertAndSend(); 其支援訊息後置處理
rabbitTemplate.send("roberto.order", "add", message);
}
}
3.建立消費者配置類 將RabbitAdmin納入Spring管理,並在MessageListenerContainer類中定義了訊息消費的邏輯
@Configuration
public class SpringAMQPConsumerConfig {
@Bean
public ConnectionFactory connectionFactory() {
com.rabbitmq.client.ConnectionFactory connectionFactory = new com.rabbitmq.client.ConnectionFactory();
// 配置連線資訊
connectionFactory.setHost("192.168.56.128");
connectionFactory.setPort(5672);
connectionFactory.setVirtualHost("/");
connectionFactory.setUsername("roberto");
connectionFactory.setPassword("roberto");
// 網路異常自動連線恢復
connectionFactory.setAutomaticRecoveryEnabled(true);
// 每10秒嘗試重試連線一次
connectionFactory.setNetworkRecoveryInterval(10000);
// 設定ConnectionFactory屬性資訊
Map<String, Object> connectionFactoryPropertiesMap = new HashMap();
connectionFactoryPropertiesMap.put("principal", "RobertoHuang");
connectionFactoryPropertiesMap.put("description", "RGP訂單系統V2.0");
connectionFactoryPropertiesMap.put("emailAddress", "[email protected]");
connectionFactory.setClientProperties(connectionFactoryPropertiesMap);
CachingConnectionFactory cachingConnectionFactory = new CachingConnectionFactory(connectionFactory);
return cachingConnectionFactory;
}
@Bean
public RabbitAdmin rabbitAdmin(ConnectionFactory connectionFactory) {
return new RabbitAdmin(connectionFactory);
}
@Bean
public MessageListenerContainer messageListenerContainer(ConnectionFactory connectionFactory) {
SimpleMessageListenerContainer messageListenerContainer = new SimpleMessageListenerContainer();
messageListenerContainer.setConnectionFactory(connectionFactory);
messageListenerContainer.setQueueNames("roberto.order.add");
// 設定消費者執行緒數
messageListenerContainer.setConcurrentConsumers(5);
// 設定最大消費者執行緒數
messageListenerContainer.setMaxConcurrentConsumers(10);
// 設定消費者屬性資訊
Map<String, Object> argumentMap = new HashMap();
messageListenerContainer.setConsumerArguments(argumentMap);
// 設定消費者標籤
messageListenerContainer.setConsumerTagStrategy(new ConsumerTagStrategy() {
@Override
public String createConsumerTag(String s) {
return "RGP訂單系統ADD處理邏輯消費者";
}
});
// 使用setAutoStartup方法可以手動設定訊息消費時機
messageListenerContainer.setAutoStartup(false);
// 使用setAfterReceivePostProcessors方法可以增加訊息後置處理器
// messageListenerContainer.setAfterReceivePostProcessors();
messageListenerContainer.setMessageListener(new MessageListener() {
@Override
public void onMessage(Message message) {
try {
System.out.println(new String(message.getBody(), "UTF-8"));
System.out.println(message.getMessageProperties());
} catch (Exception e) {
e.printStackTrace();
}
}
});
return messageListenerContainer;
}
}
4.建立消費者啟動類
@ComponentScan(basePackages = "roberto.growth.process.rabbitmq.spring.amqp.manual.declare.consumer")
public class ConsumerApplication {
public static void main(String[] args) {
AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ConsumerApplication.class);
RabbitAdmin rabbitAdmin = context.getBean(RabbitAdmin.class);
MessageListenerContainer messageListenerContainer = context.getBean(MessageListenerContainer.class);
// 宣告佇列 (佇列名", 是否持久化, 是否排他, 是否自動刪除, 佇列屬性);
rabbitAdmin.declareQueue(new Queue("roberto.order.add", true, false, false, new HashMap<>()));
// 宣告Direct Exchange (交換機名, 是否持久化, 是否自動刪除, 交換機屬性);
rabbitAdmin.declareExchange(new DirectExchange("roberto.order", true, false, new HashMap<>()));
// 將佇列Binding到交換機上 Routing key為add
rabbitAdmin.declareBinding(BindingBuilder.bind(new Queue("roberto.order.add")).to(new DirectExchange("roberto.order")).with("add"));
// 開始監聽佇列
messageListenerContainer.start();
}
}
5.依次啟動訊息消費者和生產者 控制檯輸出如下
訂單資訊
MessageProperties [headers={}, contentType=UTF-8, contentLength=0, receivedDeliveryMode=PERSISTENT, priority=0, redelivered=false, receivedExchange=roberto.order, receivedRoutingKey=add, deliveryTag=1, consumerTag=RGP訂單系統ADD處理邏輯消費者, consumerQueue=roberto.order.add]
上訴程式碼使用Spring整合RabbitMQ,最終實現效果和上一篇部落格介紹RabbitMQ Java Client一致
Spring AMQP自動宣告
在上訴的Demo中我們是手動使用RabbitAdmin對交換機、佇列和繫結進行宣告的,Spring AMQP還提供了自動宣告方式交換機、佇列和繫結。我們可以直接把要自動宣告的元件納入Spring容器中管理即可,自動聲明發生在RabbitMQ第一次連線建立的時候,自動宣告支援單個和批量自動宣告。使用自動宣告需要符合如下條件:
1.需要有連線產生
2.RabbitAdmin必須交由Spring管理,且autoStartup必須為true(預設)
3.如果ConnectionFactory使用的是CachingConnectionFactory,則cacheMode必須要為CacheMode.CHANNEL
4.所有要宣告的元件的shouldDeclare必須為true
5.要宣告的Queue名稱不能以amq.開頭
上訴規則定義在RabbitAdmin的afterPropertiesSet方法中,有興趣的同學可以自行閱讀RabbitAdmin原始碼
1.建立生產者配置類 將RabbitAdmin、RabbitTemplate納入Spring管理
@Configuration
public class SpringAMQPProducerConfig {
@Bean
public ConnectionFactory connectionFactory() {
com.rabbitmq.client.ConnectionFactory connectionFactory = new com.rabbitmq.client.ConnectionFactory();
// 配置連線資訊
connectionFactory.setHost("192.168.56.128");
connectionFactory.setPort(5672);
connectionFactory.setVirtualHost("/");
connectionFactory.setUsername("roberto");
connectionFactory.setPassword("roberto");
// 網路異常自動連線恢復
connectionFactory.setAutomaticRecoveryEnabled(true);
// 每10秒嘗試重試連線一次
connectionFactory.setNetworkRecoveryInterval(10000);
// 設定ConnectionFactory屬性資訊
Map<String, Object> connectionFactoryPropertiesMap = new HashMap();
connectionFactoryPropertiesMap.put("principal", "RobertoHuang");
connectionFactoryPropertiesMap.put("description", "RGP訂單系統V2.0");
connectionFactoryPropertiesMap.put("emailAddress", "[email protected]");
connectionFactory.setClientProperties(connectionFactoryPropertiesMap);
CachingConnectionFactory cachingConnectionFactory = new CachingConnectionFactory(connectionFactory);
return cachingConnectionFactory;
}
@Bean
public RabbitAdmin rabbitAdmin(ConnectionFactory connectionFactory) {
return new RabbitAdmin(connectionFactory);
}
@Bean
public RabbitTemplate rabbitTemplate(ConnectionFactory connectionFactory) {
return new RabbitTemplate(connectionFactory);
}
}
2.建立生產者啟動類
@ComponentScan(basePackages = "roberto.growth.process.rabbitmq.spring.amqp.auto.declare.producer")
public class ProducerApplication {
public static void main(String[] args) {
AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(roberto.growth.process.rabbitmq.spring.amqp.manual.declare.producer.ProducerApplication.class);
RabbitAdmin rabbitAdmin = context.getBean(RabbitAdmin.class);
RabbitTemplate rabbitTemplate = context.getBean(RabbitTemplate.class);
// 宣告交換機
rabbitAdmin.declareExchange(new DirectExchange("roberto.order", true, false, new HashMap<>()));
// 宣告訊息 (訊息體, 訊息屬性)
MessageProperties messageProperties = new MessageProperties();
messageProperties.setDeliveryMode(MessageDeliveryMode.PERSISTENT);
messageProperties.setContentType("UTF-8");
Message message = new Message("訂單資訊".getBytes(), messageProperties);
// 釋出訊息 (交換機名, Routing key, 訊息);
// 釋出訊息還可以使用rabbitTemplate.convertAndSend(); 其支援訊息後置處理
rabbitTemplate.send("roberto.order", "add", message);
}
}
3.建立消費者配置類 將RabbitAdmin納入Spring管理,並在MessageListenerContainer類中定義了訊息消費的邏輯,並且在該配置類中宣告交換機,佇列,繫結
@Configuration
public class SpringAMQPConsumerConfig {
@Bean
public ConnectionFactory connectionFactory() {
com.rabbitmq.client.ConnectionFactory connectionFactory = new com.rabbitmq.client.ConnectionFactory();
// 配置連線資訊
connectionFactory.setHost("192.168.56.128");
connectionFactory.setPort(5672);
connectionFactory.setVirtualHost("/");
connectionFactory.setUsername("roberto");
connectionFactory.setPassword("roberto");
// 網路異常自動連線恢復
connectionFactory.setAutomaticRecoveryEnabled(true);
// 每10秒嘗試重試連線一次
connectionFactory.setNetworkRecoveryInterval(10000);
// 設定ConnectionFactory屬性資訊
Map<String, Object> connectionFactoryPropertiesMap = new HashMap();
connectionFactoryPropertiesMap.put("principal", "RobertoHuang");
connectionFactoryPropertiesMap.put("description", "RGP訂單系統V2.0");
connectionFactoryPropertiesMap.put("emailAddress", "[email protected]");
connectionFactory.setClientProperties(connectionFactoryPropertiesMap);
CachingConnectionFactory cachingConnectionFactory = new CachingConnectionFactory(connectionFactory);
return cachingConnectionFactory;
}
@Bean
public RabbitAdmin rabbitAdmin(ConnectionFactory connectionFactory) {
return new RabbitAdmin(connectionFactory);
}
@Bean
// 自動宣告交換機
// 如果要一次性宣告多個 使用public List<Exchange> listExchange()即可
public Exchange exchange() {
return new DirectExchange("roberto.order", true, false, new HashMap<>());
}
@Bean
// 自動宣告佇列
// 如果要一次性宣告多個 使用public List<Queue> listQueue()即可
public Queue queue() {
return new Queue("roberto.order.add", true, false, false, new HashMap<>());
}
@Bean
// 自動宣告繫結
// 如果要一次性宣告多個 使用public List<Binding> listBinding()即可
public Binding binding() {
return new Binding("roberto.order.add", Binding.DestinationType.QUEUE, "roberto.order", "add", new HashMap<>());
}
@Bean
public MessageListenerContainer messageListenerContainer(ConnectionFactory connectionFactory) {
SimpleMessageListenerContainer messageListenerContainer = new SimpleMessageListenerContainer();
messageListenerContainer.setConnectionFactory(connectionFactory);
messageListenerContainer.setQueueNames("roberto.order.add");
// 設定消費者執行緒數
messageListenerContainer.setConcurrentConsumers(5);
// 設定最大消費者執行緒數
messageListenerContainer.setMaxConcurrentConsumers(10);
// 設定消費者屬性資訊
Map<String, Object> argumentMap = new HashMap();
messageListenerContainer.setConsumerArguments(argumentMap);
// 設定消費者標籤
messageListenerContainer.setConsumerTagStrategy(new ConsumerTagStrategy() {
@Override
public String createConsumerTag(String s) {
return "RGP訂單系統ADD處理邏輯消費者";
}
});
// 使用setAutoStartup方法可以手動設定訊息消費時機
messageListenerContainer.setAutoStartup(true);
// 使用setAfterReceivePostProcessors方法可以增加訊息後置處理器
// messageListenerContainer.setAfterReceivePostProcessors();
messageListenerContainer.setMessageListener(new MessageListener() {
@Override
public void onMessage(Message message) {
try {
System.out.println(new String(message.getBody(), "UTF-8"));
System.out.println(message.getMessageProperties());
} catch (Exception e) {
e.printStackTrace();
}
}
});
return messageListenerContainer;
}
}
4.建立消費者啟動類
@ComponentScan(basePackages = "roberto.growth.process.rabbitmq.spring.amqp.auto.declare.consumer")
public class ConsumerApplication {
public static void main(String[] args) {
new AnnotationConfigApplicationContext(ConsumerApplication.class);
}
}
5.依次啟動訊息消費者和生產者 控制檯輸出如下
訂單資訊
MessageProperties [headers={}, contentType=UTF-8, contentLength=0, receivedDeliveryMode=PERSISTENT, priority=0, redelivered=false, receivedExchange=roberto.order, receivedRoutingKey=add, deliveryTag=1, consumerTag=RGP訂單系統ADD處理邏輯消費者, consumerQueue=roberto.order.add]
該程式碼與上訴程式碼實現的效果一致,只是將交換機,佇列,繫結進行了自動宣告
MessageListenerAdapte
以上兩個Demo在消費訊息處理邏輯時往MessageListenerContainer中傳遞了MessageListener,但是我們有時候已經寫好了消費邏輯對應的類,我們不希望它去擴充套件MessageListener/ChannelAwareMessageListener,因為這麼做的話意味著我們需要改變現有程式碼。Spring AMQP提供了訊息處理器介面卡的功能,它可以把一個純POJO類適配成一個可以處理訊息的處理器,預設處理訊息的方法為handleMessage,可以通過setDefaultListenerMethod方法進行修改
1.建立生產者配置類
@Configuration
public class SpringAMQPProducerConfig {
@Bean
public ConnectionFactory connectionFactory() {
com.rabbitmq.client.ConnectionFactory connectionFactory = new com.rabbitmq.client.ConnectionFactory();
connectionFactory.setHost("192.168.56.128");
connectionFactory.setPort(5672);
connectionFactory.setVirtualHost("/");
connectionFactory.setUsername("roberto");
connectionFactory.setPassword("roberto");
connectionFactory.setAutomaticRecoveryEnabled(true);
connectionFactory.setNetworkRecoveryInterval(10000);
Map<String, Object> connectionFactoryPropertiesMap = new HashMap();
connectionFactoryPropertiesMap.put("principal", "RobertoHuang");
connectionFactoryPropertiesMap.put("description", "RGP訂單系統V2.0");
connectionFactoryPropertiesMap.put("emailAddress", "[email protected]");
connectionFactory.setClientProperties(connectionFactoryPropertiesMap);
CachingConnectionFactory cachingConnectionFactory = new CachingConnectionFactory(connectionFactory);
return cachingConnectionFactory;
}
@Bean
public RabbitAdmin rabbitAdmin(ConnectionFactory connectionFactory) {
return new RabbitAdmin(connectionFactory);
}
@Bean
public RabbitTemplate rabbitTemplate(ConnectionFactory connectionFactory) {
return new RabbitTemplate(connectionFactory);
}
}
2.建立生產者啟動類
@ComponentScan(basePackages = "roberto.growth.process.rabbitmq.spring.amqp.message.listener.adapte.producer")
public class ProducerApplication {
public static void main(String[] args) {
AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ProducerApplication.class);
RabbitAdmin rabbitAdmin = context.getBean(RabbitAdmin.class);
RabbitTemplate rabbitTemplate = context.getBean(RabbitTemplate.class);
rabbitAdmin.declareExchange(new DirectExchange("roberto.order", true, false, new HashMap<>()));
MessageProperties messageProperties = new MessageProperties();
messageProperties.setDeliveryMode(MessageDeliveryMode.PERSISTENT);
messageProperties.setContentType("UTF-8");
Message message = new Message("訂單資訊".getBytes(), messageProperties);
rabbitTemplate.send("roberto.order", "add", message);
}
}
3.建立消費者訊息處理器類,它可是是純POJO類
public class MessageHandle {
public void add(byte[] message){
try {
System.out.println(new String(message,"UTF-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
}
4.建立消費者配置類 配置自定義訊息處理器(將roberto.order.add佇列使用自定義訊息處理類的add方法進行處理)
@Configuration
public class SpringAMQPConsumerConfig {
@Bean
public ConnectionFactory connectionFactory() {
com.rabbitmq.client.ConnectionFactory connectionFactory = new com.rabbitmq.client.ConnectionFactory();
connectionFactory.setHost("192.168.56.128");
connectionFactory.setPort(5672);
connectionFactory.setVirtualHost("/");
connectionFactory.setUsername("roberto");
connectionFactory.setPassword("roberto");
connectionFactory.setAutomaticRecoveryEnabled(true);
connectionFactory.setNetworkRecoveryInterval(10000);
Map<String, Object> connectionFactoryPropertiesMap = new HashMap();
connectionFactoryPropertiesMap.put("principal", "RobertoHuang");
connectionFactoryPropertiesMap.put("description", "RGP訂單系統V2.0");
connectionFactoryPropertiesMap.put("emailAddress", "[email protected]");
connectionFactory.setClientProperties(connectionFactoryPropertiesMap);
CachingConnectionFactory cachingConnectionFactory = new CachingConnectionFactory(connectionFactory);
return cachingConnectionFactory;
}
@Bean
public RabbitAdmin rabbitAdmin(ConnectionFactory connectionFactory) {
return new RabbitAdmin(connectionFactory);
}
@Bean
public Exchange exchange() {
return new DirectExchange("roberto.order", true, false, new HashMap<>());
}
@Bean
public Queue queue() {
return new Queue("roberto.order.add", true, false, false, new HashMap<>());
}
@Bean
public Binding binding() {
return new Binding("roberto.order.add", Binding.DestinationType.QUEUE, "roberto.order", "add", new HashMap<>());
}
@Bean
public MessageListenerContainer messageListenerContainer(ConnectionFactory connectionFactory) {
SimpleMessageListenerContainer messageListenerContainer = new SimpleMessageListenerContainer();
messageListenerContainer.setConnectionFactory(connectionFactory);
messageListenerContainer.setQueueNames("roberto.order.add");
messageListenerContainer.setConcurrentConsumers(5);
messageListenerContainer.setMaxConcurrentConsumers(10);
Map<String, Object> argumentMap = new HashMap();
messageListenerContainer.setConsumerArguments(argumentMap);
messageListenerContainer.setConsumerTagStrategy(new ConsumerTagStrategy() {
@Override
public String createConsumerTag(String s) {
return "RGP訂單系統ADD處理邏輯消費者";
}
});
messageListenerContainer.setAutoStartup(true);
// 新建訊息處理器介面卡
MessageListenerAdapter messageListenerAdapter = new MessageListenerAdapter(new MessageHandle());
// 設定預設處理訊息方法
messageListenerAdapter.setDefaultListenerMethod("handleMessage");
Map<String, String> queueOrTagToMethodName = new HashMap<>();
// 將roberto.order.add佇列的訊息 使用add方法進行處理
queueOrTagToMethodName.put("roberto.order.add","add");
messageListenerAdapter.setQueueOrTagToMethodName(queueOrTagToMethodName);
messageListenerContainer.setMessageListener(messageListenerAdapter);
return messageListenerContainer;
}
}
5.建立消費者啟動類
@ComponentScan(basePackages = "roberto.growth.process.rabbitmq.spring.amqp.message.listener.adapte.consumer")
public class ConsumerApplication {
public static void main(String[] args) {
new AnnotationConfigApplicationContext(ConsumerApplication.class);
}
}
6.依次啟動訊息消費者和生產者 控制檯輸出如下
訂單資訊
如上Demo說明我們可以將一個純POJO類定義為訊息處理器,並且不用去擴充套件MessageListener/ChannelAwareMessageListener介面,關於自定義處理器方法的引數預設情況下為byte[]型別,這是由Spring AMQP預設訊息轉換器(SimpleMessageConverter)決定的,接下來我們將介紹Spring AMQP的訊息轉換器功能
Spring AMQP訊息轉換器
在上訴例子中我們定義的add(byte[] message)方法的引數是一個位元組陣列,但是有時候我們往RabbitMQ中傳送的是一個JSON物件,我們希望在處理訊息的時候它已經自動幫我們轉為JAVA物件;又或者我們往RabbitMQ中傳送的是一張圖片或其他格式的檔案,我們希望在處理訊息的時候它已經自動幫我們轉成檔案格式,我們可以手動設定MessageConverter來實現如上需求,如果未設定MessageConverter則使用Spring AMQP預設提供的SimpleMessageConverter
以下例子使用MessageConverter實現了當生產者往RabbitMQ傳送不同型別的資料的時候,使用MessageHandle不同的方法進行處理,需要注意的是當生產者在傳送JSON資料的時候,需要制定這個JSON是哪個物件,用於Spring AMQP轉換,規則如下
當傳送普通物件的JSON資料時,需要在訊息的header中增加一個__TypeId__的屬性告知消費者是哪個物件
當傳送List集合物件的JSON資料時,需要在訊息的header中將__TypeId__指定為java.util.List,並且需要額外指定屬性__ContentTypeId__使用者告知消費者List集合中的物件型別
當傳送Map集合物件的JSON資料時,需要在訊息的header中將__TypeId__指定為java.util.Map,並且需要額外指定屬性__KeyTypeId__用於告知客戶端Map中key的型別,__ContentTypeId__用於告知客戶端Map中Value的型別
1.建立訂單實體類
public class Order {
/**
* 訂單編號
**/
private String orderId;
/**
* 訂單金額
**/
private BigDecimal orderAmount;
public Order() {
}
public Order(String orderId, BigDecimal orderAmount) {
this.orderId = orderId;
this.orderAmount = orderAmount;
}
public String getOrderId() {
return orderId;
}
public void setOrderId(String orderId) {
this.orderId = orderId;
}
public BigDecimal getOrderAmount() {
return orderAmount;
}
public void setOrderAmount(BigDecimal orderAmount) {
this.orderAmount = orderAmount;
}
}
2.自定義檔案訊息轉換器
public class FileMessageConverter implements MessageConverter {
@Override
public Message toMessage(Object object, MessageProperties messageProperties) throws MessageConversionException {
return null;
}
@Override
public Object fromMessage(Message message) throws MessageConversionException {
String extName = (String) message.getMessageProperties().getHeaders().get("_extName");
byte[] bytes = message.getBody();
String fileName = UUID.randomUUID().toString();
String filePath = System.getProperty("java.io.tmpdir") + fileName + "." + extName;
File tempFile = new File(filePath);
try {
FileCopyUtils.copy(bytes, tempFile);
} catch (IOException e) {
throw new MessageConversionException("FileMessageConverter訊息轉換失敗", e);
}
return tempFile;
}
}
3.自定義字串訊息轉換器
public class StringMessageConverter implements MessageConverter{
@Override
public Message toMessage(Object object, MessageProperties messageProperties) throws MessageConversionException {
return null;
}
@Override
public Object fromMessage(Message message) throws MessageConversionException {
try {
return new String(message.getBody(), "UTF-8");
} catch (UnsupportedEncodingException e) {
throw new MessageConversionException("StringMessageConverter轉換失敗", e);
}
}
}
4.自定義訊息處理器類
public class MessageHandle {
public void add(byte[] body) {
System.out.println("----------byte[]方法進行處理----------");
System.out.println("body");
}
public void add(String message) {
System.out.println("----------String方法進行處理----------");
System.out.println(message);
}
public void add(File file) {
System.out.println("----------File方法進行處理----------");
System.out.println(file.length());
System.out.println(file.getName());
System.out.println(file.getAbsolutePath());
}
public void add(Order order) {
System.out.println("----------Order方法進行處理----------");
System.out.println(order.getOrderId() + "---" + order.getOrderAmount());
}
public void add(List<Order> orderList) {
System.out.println("----------List<Order>方法進行處理----------");
System.out.println(orderList.size());
for (Order order : orderList) {
System.out.println(order.getOrderId() + "---" + order.getOrderAmount());
}
}
public void add(Map<String, Order> orderMap) {
System.out.println("----------Map<String, Order>方法進行處理----------");
for (Map.Entry<String, Order> entry : orderMap.entrySet()) {
System.out.println(entry.getKey());
System.out.println(entry.getValue().getOrderId() + "---" + entry.getValue().getOrderAmount());
}
}
}
5.建立生產者配置類
@Configuration
public class SpringAMQPProducerConfig {
@Bean
public ConnectionFactory connectionFactory() {
com.rabbitmq.client.ConnectionFactory connectionFactory = new com.rabbitmq.client.ConnectionFactory();
connectionFactory.setHost("192.168.56.128");
connectionFactory.setPort(5672);
connectionFactory.setVirtualHost("/");
connectionFactory.setUsername("roberto");
connectionFactory.setPassword("roberto");
connectionFactory.setAutomaticRecoveryEnabled(true);
connectionFactory.setNetworkRecoveryInterval(10000);
Map<String, Object> connectionFactoryPropertiesMap = new HashMap();
connectionFactoryPropertiesMap.put("principal", "RobertoHuang");
connectionFactoryPropertiesMap.put("description", "RGP訂單系統V2.0");
connectionFactoryPropertiesMap.put("emailAddress", "[email protected]");
connectionFactory.setClientProperties(connectionFactoryPropertiesMap);
CachingConnectionFactory cachingConnectionFactory = new CachingConnectionFactory(connectionFactory);
return cachingConnectionFactory;
}
@Bean
public RabbitAdmin rabbitAdmin(ConnectionFactory connectionFactory) {
return new RabbitAdmin(connectionFactory);
}
@Bean
public RabbitTemplate rabbitTemplate(ConnectionFactory connectionFactory) {
return new RabbitTemplate(connectionFactory);
}
}
6.建立生產者啟動類 傳送多條不同訊息型別訊息
@ComponentScan(basePackages = "roberto.growth.process.rabbitmq.spring.amqp.message.converter.producer")
public class ProducerApplication {
public static void main(String[] args) throws Exception {
AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ProducerApplication.class);
RabbitAdmin rabbitAdmin = context.getBean(RabbitAdmin.class);
RabbitTemplate rabbitTemplate = context.getBean(RabbitTemplate.class);
rabbitAdmin.declareExchange(new DirectExchange("roberto.order", true, false, new HashMap<>()));
// 傳送字串
sendString(rabbitTemplate);
// 傳送當個物件JSON
sendSingle(rabbitTemplate);
// 傳送List集合JSON
sendList(rabbitTemplate);
// 傳送Map集合JSON
sendMap(rabbitTemplate);
// 傳送圖片
sendImage(rabbitTemplate);
}
public static void sendString(RabbitTemplate rabbitTemplate) {
// 宣告訊息 (訊息體, 訊息屬性)
MessageProperties messageProperties = new MessageProperties();
messageProperties.setDeliveryMode(MessageDeliveryMode.PERSISTENT);
messageProperties.setContentType("text/plain");
Message message = new Message("訂單訊息".getBytes(), messageProperties);
rabbitTemplate.send("roberto.order", "add", message);
}
public static void sendSingle(RabbitTemplate rabbitTemplate) throws Exception {
Order order = new Order("OD0000001", new BigDecimal(888888.888888));
ObjectMapper objectMapper = new ObjectMapper();
// 宣告訊息 (訊息體, 訊息屬性)
MessageProperties messageProperties = new MessageProperties();
messageProperties.getHeaders().put("__TypeId__", "order");
messageProperties.setDeliveryMode(MessageDeliveryMode.PERSISTENT);
messageProperties.setContentType("application/json");
Message message = new Message(objectMapper.writeValueAsString(order).getBytes(), messageProperties);
rabbitTemplate.send("roberto.order", "add", message);
}
public static void sendList(RabbitTemplate rabbitTemplate) throws Exception {
Order order = new Order("OD0000001", new BigDecimal(888888.888888));
Order order2 = new Order("OD0000002", new BigDecimal(888888.888888));
List<Order> orderList = Arrays.asList(order, order2);
ObjectMapper objectMapper = new ObjectMapper();
// 宣告訊息 (訊息體, 訊息屬性)
MessageProperties messageProperties = new MessageProperties();
messageProperties.getHeaders().put("__TypeId__", "java.util.List");
messageProperties.getHeaders().put("__ContentTypeId__", "order");
messageProperties.setDeliveryMode(MessageDeliveryMode.PERSISTENT);
messageProperties.setContentType("application/json"