Java Qpid Proton - ActiveMQ 代理无法分配请求的地址 : bind

Question

我真的需要这个问题的答案，这就是我编辑它的原因。

我使用此代码在连接内构建了一个 Apache ActiveMQ 代理

Broker.java

公共(public)类经纪人{

private BrokerService broker;

public Broker(String connector) {
    this.broker = new BrokerService();
    this.broker.setUseJmx(true);
    try {
        this.broker.addConnector(connector);

    } catch (URISyntaxException e) {
        e.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

public void addConnector(String connector){
    try {
        this.broker.addConnector(connector);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

public void start() {
    try {
        this.broker.start();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

public BrokerService getBroker() {
    return broker;
}

public void setBroker(BrokerService broker) {
    this.broker = broker;
}

}

这是我的问题

我使用 Qpid Proton 库(可在此处获取:Qpid Proton)。我有一个类来读取数据，这几乎是他们在 qpid webiste 上为您提供的示例

package messaging;

import java.io.IOException;

import org.apache.qpid.proton.Proton;
import org.apache.qpid.proton.amqp.messaging.AmqpValue;
import org.apache.qpid.proton.engine.BaseHandler;
import org.apache.qpid.proton.engine.Delivery;
import org.apache.qpid.proton.engine.Event;
import org.apache.qpid.proton.engine.Receiver;
import org.apache.qpid.proton.message.Message;
import org.apache.qpid.proton.reactor.FlowController;
import org.apache.qpid.proton.reactor.Handshaker;

public class AMQPSubscriber extends BaseHandler {

    private String broker;
    private String topic;
    private String port;

    public AMQPSubscriber(String broker, String port, String topic) {
        this.broker = broker;
        this.port = port;
        this.topic = topic;
        this.add(new Handshaker());
        this.add(new FlowController());

    }

    @Override
    public void onReactorInit(Event event) {
        try {
            event.getReactor().acceptor(broker, Integer.parseInt(port), new AMQPSubscriber(broker, port, topic));
        } catch (NumberFormatException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onDelivery(Event event) {
        System.out.println("---------Message Received--------");
        Receiver recv = (Receiver) event.getLink();
        Delivery delivery = recv.current();
        if (delivery.isReadable() && !delivery.isPartial()) {
            int size = delivery.pending();
            byte[] buffer = new byte[size];
            int read = recv.recv(buffer, 0, buffer.length);
            recv.advance();

            Message msg = Proton.message();
            msg.decode(buffer, 0, read);
            System.out.println("Subject : " + msg.getProperties().getSubject());
            System.out.println("Text : " + ((AmqpValue) msg.getBody()).getValue());
        }
    }

}

这个类在 main 中被调用:

public static void main (String[]args) throws IOException, TimeoutException, InterruptedException{

    Broker broker = new Broker("amqp://" + host + ":" + AMQPport);
    broker.start();

 AMQPSubscriber receiv = new AMQPSubscriber(host, "5672", topic);
        Reactor r;
        try {
            r = Proton.reactor(receiv);
            r.run();
        } catch (IOException e) {
            e.printStackTrace();
        }


}

但是当我执行这段代码时，我得到了

 INFO | Loaded the Bouncy Castle security provider.
 INFO | Using Persistence Adapter: KahaDBPersistenceAdapter[C:\Users\alexi\Documents\workspace-sts-3.7.3.RELEASE\IOT\activemq-data\localhost\KahaDB]
 INFO | JMX consoles can connect to service:jmx:rmi:///jndi/rmi://localhost:1099/jmxrmi
 INFO | KahaDB is version 6
 INFO | Recovering from the journal @1:61115
 INFO | Recovery replayed 11 operations from the journal in 0.014 seconds.
 INFO | PListStore:[C:\Users\alexi\Documents\workspace-sts-3.7.3.RELEASE\IOT\activemq-data\localhost\tmp_storage] started
 INFO | Apache ActiveMQ 5.13.3 (localhost, ID:DESKTOP-UK0JIC4-52783-1467025817901-0:1) is starting
 INFO | Listening for connections at: amqp://127.0.0.1:5672
 INFO | Connector amqp://127.0.0.1:5672 started
 INFO | Apache ActiveMQ 5.13.3 (localhost, ID:DESKTOP-UK0JIC4-52783-1467025817901-0:1) started
 INFO | For help or more information please see: http://activemq.apache.org
 WARN | Store limit is 102400 mb (current store usage is 0 mb). The data directory: C:\Users\alexi\Documents\workspace-sts-3.7.3.RELEASE\IOT\activemq-data\localhost\KahaDB only has 7792 mb of usable space. - resetting to maximum available disk space: 7792 mb
 WARN | Temporary Store limit is 51200 mb (current store usage is 0 mb). The data directory: C:\Users\alexi\Documents\workspace-sts-3.7.3.RELEASE\IOT\activemq-data\localhost only has 7792 mb of usable space. - resetting to maximum available disk space: 7792 mb
java.net.BindException: Address already in use: bind
    at sun.nio.ch.Net.bind0(Native Method)
    at sun.nio.ch.Net.bind(Unknown Source)
    at sun.nio.ch.Net.bind(Unknown Source)
    at sun.nio.ch.ServerSocketChannelImpl.bind(Unknown Source)
    at java.nio.channels.ServerSocketChannel.bind(Unknown Source)
    at org.apache.qpid.proton.reactor.impl.AcceptorImpl.<init>(AcceptorImpl.java:102)
    at org.apache.qpid.proton.reactor.impl.ReactorImpl.acceptor(ReactorImpl.java:477)
    at messaging.AMQPSubscriber.onReactorInit(AMQPSubscriber.java:33)
    at org.apache.qpid.proton.engine.BaseHandler.handle(BaseHandler.java:209)
    at org.apache.qpid.proton.engine.impl.EventImpl.dispatch(EventImpl.java:108)
    at org.apache.qpid.proton.engine.impl.EventImpl.delegate(EventImpl.java:129)
    at org.apache.qpid.proton.engine.impl.EventImpl.dispatch(EventImpl.java:114)
    at org.apache.qpid.proton.reactor.impl.ReactorImpl.dispatch(ReactorImpl.java:307)
    at org.apache.qpid.proton.reactor.impl.ReactorImpl.process(ReactorImpl.java:275)
    at org.apache.qpid.proton.reactor.impl.ReactorImpl.run(ReactorImpl.java:343)
    at messaging.Main.main(Main.java:98)

当我使用 MQTT 和 Paho 时，该代理工作正常，我希望它也适用于 AMQP。我知道绑定(bind)意味着端口已被使用，但我不知道如何在没有发送数据的端口上监听。

谢谢你帮助我。

亚历克西

Answer 1

当有另一个应用程序创建了监听您请求的目标端口的服务器套接字时，您会收到该错误。您需要检查您是否没有在该端口上运行另一个代理实例，或者是否有某些防火墙阻止访问。