[英]How to get number of messages processed by queue created with activeMQ in java?
[英]ActiveMQ: How to get all messages in a queue for Receiver (Java)
這是服務器的代碼:
import java.net.UnknownHostException;
import java.io.IOException;
import org.apache.activemq.transport.stomp.StompConnection;
public class Server{
public static void main(String[] args) {
try {
StompConnection con = new StompConnection();
con.open("localhost", 61618);
con.connect("admin", "admin123");
con.begin("a1");
con.send("/queue/test1", "This is test message 1");
con.send("/queue/test1", "This is test message 2");
con.send("/queue/test1", "This is test message 3");
con.commit("a1");
con.disconnect();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}
這是客戶的代碼:
import java.io.IOException;
import java.net.UnknownHostException;
import java.util.Scanner;
import org.apache.activemq.transport.stomp.StompConnection;
import org.apache.activemq.transport.stomp.StompFrame;
import org.apache.activemq.transport.stomp.Stomp.Headers.Subscribe;
public class Client {
public static void main(String[] args) {
try {
//login.
Scanner in = new Scanner(System.in);
System.out.print("Password: ");
String pass = in.next();
if (!"123".equals(pass)){
System.out.println("Sorry, wrong password.");
}
else
{
StompConnection con= new StompConnection();
con.open("localhost", 61618);
con.connect("admin", "admin123");
con.subscribe("/queue/test1", Subscribe.AckModeValues.CLIENT);
con.begin("a2");
StompFrame mes = con.receive();
System.out.println(mes.getBody());
con.ack(message, "a2");
con.commit("a2");
con.disconnect();
}
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}
我在服務器上有3條消息。 但是,我每次只能在Client中收到1條消息。 如何在運行中獲取隊列中的所有消息? 有人可以幫助我嗎?
不能完全確定您在這里嘗試過什么,但要閱讀所有這三個內容只是一個簡單的循環,例如:
con.begin("a2");
while (true) {
StompFrame message = null;
try {
message = connection.receive(5000);
} catch (Exception e) {
break;
}
System.out.println(mes.getBody());
con.ack(message, "a2");
}
connection.commit("a2");
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