org.jboss.remotingjmx.protocol.v2.WelcomeMessageReceiver Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* JBoss, Home of Professional Open Source.
* Copyright 2023 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.remotingjmx.protocol.v2;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.Arrays;
import org.jboss.logging.Logger;
import org.jboss.remoting3.Channel;
import org.jboss.remoting3.MessageInputStream;
import org.xnio.IoFuture;
import org.xnio.IoUtils;
/**
* The WelcomeMessageReceiver Receiver used by the client.
*
* This is a special receiver as unlike the other messages blocking on the result is desired to ensure the connection is
* established before any client interactions occur.
*
* Unlike version one of the protocol this version does not receive any data from the server, just the welcome message to
* confirm the server is ready to handle requests.
*
* @author Darran Lofthouse
*/
class WelcomeMessageReceiver implements Channel.Receiver {
private static final Logger log = Logger.getLogger(WelcomeMessageReceiver.class);
private final VersionedIoFuture future;
private WelcomeMessageReceiver(VersionedIoFuture future) {
this.future = future;
}
public static IoFuture awaitWelcomeMessage(final Channel channel) {
VersionedIoFuture future = new VersionedIoFuture();
channel.receiveMessage(new WelcomeMessageReceiver(future));
return future;
}
public void handleMessage(Channel channel, MessageInputStream messageInputStream) {
DataInputStream dis = new DataInputStream(messageInputStream);
try {
log.tracef("Bytes Available %d", dis.available());
byte[] firstThree = new byte[3];
dis.read(firstThree);
log.tracef("First Three %s", new String(firstThree));
if (Arrays.equals(firstThree, "JMX".getBytes()) == false) {
throw new IOException("Invalid leading bytes in header.");
}
future.setResult(null);
} catch (IOException e) {
future.setException(e);
} finally {
IoUtils.safeClose(dis);
}
}
public void handleError(Channel channel, IOException e) {
future.setException(e);
}
public void handleEnd(Channel channel) {
future.setException(new IOException("Channel ended"));
}
}