java - 使用 Java 程序在 Azure 服务总线队列中接收待处理消息?
问题描述
我正在处理 Azure 服务总线队列中的待处理消息。我已经在 Azure ServiceBus 中创建了一个队列 (SampleQueue),并且我能够使用我的 Java 程序生成的 SAS 令牌通过 POSTMAN 在该队列中成功发送消息。在点击我的服务总线队列 api url(下图)后,我也获得了 201 创建状态。
我想在我的服务总线队列中接收待处理的消息。我浏览了一些关于接收消息的链接(https://docs.microsoft.com/en-us/azure/service-bus-messaging/service-bus-java-how-to-use-queues),但这并没有包含有关我如何接收和查看这些消息的信息。
我从服务总线队列接收消息的 Java 代码如下所示[我是 Java 新手]:-
public class Test2 {
public static void main(String[] args) throws ServiceException {
String namespace = "SampleNamespace";
String sharedKeyName = "RootManageSharedAccessKey";
String sharedSecretKey = "t+U5ERMAnIyxgEUDUouGOKn6ADM/CuLWzEJZtauwVsc=";
String queueName = "QueueName";
// Azure Service Bus Service
com.microsoft.windowsazure.Configuration config = ServiceBusConfiguration.configureWithSASAuthentication(namespace, sharedKeyName, sharedSecretKey, ".servicebus.windows.net");
ServiceBusContract service = ServiceBusService.create(config);
// Receive and Delete Messages
ReceiveMessageOptions opts = ReceiveMessageOptions.DEFAULT;
opts.setReceiveMode(ReceiveMode.RECEIVE_AND_DELETE);
while (true) {
ReceiveQueueMessageResult resultQM = service.receiveQueueMessage(queueName , opts);
BrokeredMessage message = resultQM.getValue();
if (message != null && message.getMessageId() != null) {
System.out.println("Body: " + message.toString());
System.out.println("MessageID: " + message.getMessageId());
} else {
System.out.println("No more messages.");
break;
}
}
}
}
但是当我运行此代码时,出现以下错误:-
Exception in thread "main" java.lang.NoClassDefFoundError: javax/ws/rs/WebApplicationException
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)
at java.lang.Class.getConstructors(Class.java:1651)
at com.microsoft.windowsazure.core.DefaultBuilder.findInjectConstructor(DefaultBuilder.java:67)
at com.microsoft.windowsazure.core.DefaultBuilder.add(DefaultBuilder.java:94)
at com.microsoft.windowsazure.services.servicebus.Exports.register(Exports.java:34)
at com.microsoft.windowsazure.core.DefaultBuilder.create(DefaultBuilder.java:46)
at com.microsoft.windowsazure.Configuration.<init>(Configuration.java:80)
at com.microsoft.windowsazure.Configuration.load(Configuration.java:100)
at com.microsoft.windowsazure.Configuration.getInstance(Configuration.java:90)
at com.microsoft.windowsazure.services.servicebus.ServiceBusConfiguration.configureWithSASAuthentication(ServiceBusConfiguration.java:252)
at com.rocky.servicebus.queue.Test2.main(Test2.java:24)
Caused by: java.lang.ClassNotFoundException: javax.ws.rs.WebApplicationException
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
任何人都可以帮助纠正我做错了什么吗?将不胜感激任何帮助。
谢谢,鲁德拉
解决方案
根据接收消息的教程,您需要创建一个队列客户端,并为其注册一个消息处理程序。
A) 获取连接字符串。
B) 发送和接收消息的代码示例
public static void registerReceiver(QueueClient queueClient, ExecutorService executorService) throws Exception {
queueClient.registerMessageHandler(
new IMessageHandler() {
public CompletableFuture<Void> onMessageAsync(IMessage message) {
if (message.getLabel() != null &&
message.getContentType() != null &&
message.getLabel().contentEquals("TestMessage") &&
message.getContentType().contentEquals("text/plain")) {
System.out.printf(
"\nMessage received: \n -->MessageId = %s\n -->ContentType = %s\n -->Content = %s\n",
message.getMessageId(),
message.getContentType(),
new String(message.getBody())
);
return queueClient.completeAsync(message.getLockToken());
}
return queueClient.abandonAsync(message.getLockToken());
}
public void notifyException(Throwable throwable, ExceptionPhase exceptionPhase) {
System.out.printf(exceptionPhase + "-" + throwable.getMessage());
}
},
new MessageHandlerOptions(1, false, Duration.ofSeconds(10)),
executorService
);
}
public static void sendMessages(QueueClient client) throws ServiceBusException, InterruptedException {
for (int i = 0; i < 100; i++) {
String messageId = Integer.toString(i);
Message message = new Message("This is message " + i);
message.setContentType("text/plain");
message.setLabel("TestMessage");
message.setMessageId(messageId);
message.setTimeToLive(Duration.ofMinutes(10));
client.send(message);
System.out.printf("Message sent: Id = %s \n", message.getMessageId());
}
}
public static void main(String[] args) throws Exception {
String connectionString = "your_connection_string, Endpoint=sb://j*9.servicebus.windows.net/;SharedAccessKeyName=RootManageSharedAccessKey;SharedAccessKey=V*=";
String queueName = "your_queue_name, testQueue";
QueueClient client = new QueueClient(new ConnectionStringBuilder(connectionString, queueName), ReceiveMode.PEEKLOCK);
sendMessages(client);
client.close();
QueueClient receiveClient = new QueueClient(new ConnectionStringBuilder(connectionString, queueName), ReceiveMode.PEEKLOCK);
ExecutorService executorService = Executors.newSingleThreadExecutor();
registerReceiver(receiveClient, executorService);
Thread.sleep(60 * 1000); // Wait for 60 seconds to receive all the messages.
receiveClient.close();
executorService.shutdown();
}
结果:
将发送 100 条消息。
Message sent: Id = 0
Message sent: Id = 1
Message sent: Id = 2
Message sent: Id = 3
*
*
*
Message sent: Id = 99
然后将开始接收消息。
Message received:
-->MessageId = 0
-->ContentType = text/plain
-->Content = This is message 0
Message received:
-->MessageId = 1
-->ContentType = text/plain
-->Content = This is message 1
Message received:
-->MessageId = 2
-->ContentType = text/plain
-->Content = This is message 2
*
*
*
Message received:
-->MessageId = 99
-->ContentType = text/plain
-->Content = This is message 99
推荐阅读
- typescript - Typescript SyntaxError: Unexpected token ':' i am stuck with these error while declaring a variable?
- c - How to make a strings array by using dynamic memory allocation in C?
- python - Docker 容器未连接到远程 HBase
- azure - Azure Kusto :: Convert Time in 12 Hour Format to 24 Hour Format
- xml - Flutter/Dart XML adding and inserting nodes
- php - MySQL PHP Allow User to Select From a Choice of Queries
- node.js - Node.js: Passenger puts stop to application because it takes too much time
- php - Changes in PHP.INI for OpenLiteSpeed not working
- r - R - Easy significant test on 2 dataframes
- reactjs - 在反应中获取时呈现的未定义对象