org.jboss.remotingjmx.protocol.v2.ParameterProxy 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).

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/*
 * 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 static org.jboss.remotingjmx.protocol.v2.Constants.BEGIN;
import static org.jboss.remotingjmx.protocol.v2.Constants.SET_KEY_PAIR;
import static org.jboss.remotingjmx.protocol.v2.Constants.STRING;

import java.io.DataInput;
import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.Executor;

import org.jboss.logging.Logger;
import org.jboss.remoting3.Channel;
import org.jboss.remotingjmx.MBeanServerManager;
import org.jboss.remotingjmx.ServerMessageInterceptor;
import org.jboss.remotingjmx.WrappedMBeanServerConnection;

/**
 * The server side proxy responsible for handling the initial setKeyPair requests before begin is called and an MBeanServer
 * selected.
 *
 * @author Darran Lofthouse
 */
public class ParameterProxy extends ServerCommon {

    private static final Logger log = Logger.getLogger(ParameterProxy.class);

    private final Channel channel;
    private final Map registry;
    private final Map keyPairs = new HashMap();
    private final MBeanServerManager mbeanServerManager;
    private final Executor executor;
    private final ServerMessageInterceptor serverMessageInterceptor;

    ParameterProxy(Channel channel, MBeanServerManager mbeanServerManager, Executor executor,
            ServerMessageInterceptor serverMessageInterceptor) {
        super(channel, executor, serverMessageInterceptor);
        this.channel = channel;
        this.executor = executor;
        this.mbeanServerManager = mbeanServerManager;
        registry = createHandlerRegistry();
        this.serverMessageInterceptor = serverMessageInterceptor;
    }

    private Map createHandlerRegistry() {
        Map registry = new HashMap();
        registry.put(SET_KEY_PAIR, new SetKeyPairHandler());
        registry.put(BEGIN, new BeginHandler());

        return Collections.unmodifiableMap(registry);
    }

    void start() throws IOException {
        // Create a connection ID
        log.debugf("Created connection - ID to be established after parameter negotiation.");
        // Send the welcome message.
        sendWelcomeMessage();

        channel.receiveMessage(new MessageReciever());
    }

    @Override
    Map getHandlerRegistry() {
        return registry;
    }

    @Override
    void end() {
    }

    private class SetKeyPairHandler implements Common.MessageHandler {

        @Override
        public void handle(DataInput input, final int correlationId) throws IOException {
            log.trace("SetKeyPair");

            byte paramType = input.readByte();
            if (paramType != STRING) {
                throw new IOException("Unexpected paramType");
            }

            String name = input.readUTF();

            paramType = input.readByte();
            if (paramType != STRING) {
                throw new IOException("Unexpected paramType");
            }

            String value = input.readUTF();

            keyPairs.put(name, value);

            writeResponse(SET_KEY_PAIR, correlationId);
        }
    }

    private class BeginHandler extends MessageHandler {

        @Override
        public void handle(DataInput input, int correlationId) throws IOException {
            log.trace("Begin");

            WrappedMBeanServerConnection mbeanServer = mbeanServerManager.getMBeanServer(keyPairs);

            if (mbeanServer != null) {
                ServerProxy server = new ServerProxy(channel, mbeanServer, executor, serverMessageInterceptor);
                server.start();

                String connectionId = server.getConnectionId();
                writeResponse(connectionId, BEGIN, correlationId);
            } else {
                // No MBeanServer was located ;-(
                throw new IOException("No MBeanServer identified from the specified parameters.");
            }
        }

        @Override
        boolean endReceiveLoop() {
            // This handler is responsible for setting the next Receiver.
            return true;
        }

    }

}