如果我没有明确调用它们，如何从 ReceiverAdapter class 重写方法（例如在 jgroups 中调用 viewAccepted() 方法）？

Question

我写了下面的class来创建一个JGroup集群：

public class TestClient extends ReceiverAdapter {
JChannel channel;

private void start() throws Exception {
    channel=new JChannel().setReceiver(this);
    channel.connect("ChatCluster");
    eventLoop();
    channel.close();
}

private void eventLoop() {
    while(true) {
    }
}

public void viewAccepted(View new_view) {
    System.out.println("** view: " + new_view);
    System.out.println("Get Coord"+new_view.getCoord());
    System.out.println(new_view.getMembers());
}

public void receive(Message msg) {
    System.out.println(msg.getSrc() + ": " + msg.getObject());

}

public void getState(OutputStream output) throws Exception {

}

public void setState(InputStream input) throws Exception {

}
}

ReceiverAdapter 是一个 Jgroups 定义的 class:

public class ReceiverAdapter implements Receiver {
public ReceiverAdapter() {
}

public void receive(Message msg) {
}

public void receive(MessageBatch batch) {
    Iterator var2 = batch.iterator();

    while(var2.hasNext()) {
        Message msg = (Message)var2.next();

        try {
            this.receive(msg);
        } catch (Throwable var5) {
            ;
        }
    }

}

public void getState(OutputStream output) throws Exception {
}

public void setState(InputStream input) throws Exception {
}

public void viewAccepted(View view) {
}

public void suspect(Address mbr) {
}

public void block() {
}

public void unblock() {
}
}

我的问题是如何在更改视图或 sending/receiving 消息时调用 ReceiverAdapter class 中的这些方法，因为我不需要显式调用这些方法。 JGroups 是否实现了某种事件侦听器？

Answer 1

如果我没有正确理解你的问题，我想你已经解决了你的问题。您需要明确地将 Receiver 实现传递给您希望使用它的 JChannel：

Receiver receiver = new MyReceiverImplementation();
JChannel jChannel = new JChannel().connect("clusterName").receiver(receiver);

JGroups 不会自动寻找要注入的接收器。

如果我没有明确调用它们，如何从 ReceiverAdapter class 重写方法（例如在 jgroups 中调用 viewAccepted() 方法）？

How are overridden methods from ReceiverAdapter class such as viewAccepted() method called in jgroups if I have not called them explicitly?

java

inheritance

jboss

jgroups