org.jboss.naming.remote.protocol.v1.RemoteNamingServerV1 Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging 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 2011, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jboss.naming.remote.protocol.v1;

import java.io.DataInputStream;
import java.io.IOException;

import javax.management.RuntimeMBeanException;

import org.jboss.logging.Logger;
import org.jboss.naming.remote.protocol.ProtocolCommand;
import org.jboss.naming.remote.server.RemoteNamingServer;
import org.jboss.naming.remote.server.RemoteNamingServerLogger;
import org.jboss.naming.remote.server.RemoteNamingService;
import org.jboss.remoting3.Channel;
import org.jboss.remoting3.MessageInputStream;
import org.xnio.IoUtils;

import static org.jboss.naming.remote.protocol.v1.WriteUtil.writeExceptionResponse;

/**
 * @author John Bailey
 */
public class RemoteNamingServerV1 implements RemoteNamingServer {
    private static final Logger log = Logger.getLogger(RemoteNamingServerV1.class);

    private final Channel channel;
    private final RemoteNamingService remoteNamingService;
    private final RemoteNamingServerLogger logger;

    public RemoteNamingServerV1(final Channel channel, final RemoteNamingService remoteNamingServer) {
        this.channel = channel;
        this.remoteNamingService = remoteNamingServer;
        this.logger = remoteNamingServer.getLogger();
    }

    public void start() {
        channel.receiveMessage(new MessageReciever());
    }

    private class MessageReciever implements Channel.Receiver {
        public void handleMessage(final Channel channel, MessageInputStream message) {
            final DataInputStream dis = new DataInputStream(message);
            try {
                final byte messageId = dis.readByte();
                final int correlationId = dis.readInt();
                log.tracef("Message Received id(%h), correlationId(%d)", messageId, correlationId);

                final ProtocolCommand command = Protocol.forId(messageId);
                if (command != null) {
                    remoteNamingService.getExecutor().execute(new Runnable() {
                        public void run() {
                            try {
                                command.handleServerMessage(channel, dis, correlationId, remoteNamingService);
                            } catch (Throwable t) {
                                if (correlationId != 0x00) {
                                    Exception response;
                                    if (t instanceof IOException) {
                                        response = (Exception) t;
                                    } else if (t instanceof RuntimeMBeanException) {
                                        response = (Exception) t;
                                    } else {
                                        response = new IOException("Internal server error.");
                                        logger.unnexpectedError(t);
                                    }

                                    sendIOException(response);
                                } else {
                                    logger.nullCorrelationId(t);
                                }
                            } finally {
                                IoUtils.safeClose(dis);
                            }
                        }

                        private void sendIOException(final Exception e) {
                            try {
                                writeExceptionResponse(channel, e, messageId, correlationId);
                                log.tracef("[%d] %h - Success Response Sent", correlationId, messageId);
                            } catch (IOException ioe) {
                                logger.failedToSendExceptionResponse(ioe);
                            }
                        }

                    });

                } else {
                    throw new IOException("Unrecognised Message ID");
                }
            } catch (Throwable e) {
                logger.unnexpectedError(e);
                IoUtils.safeClose(dis);
            } finally {
                channel.receiveMessage(this);
            }
        }

        public void handleError(final Channel channel, final IOException error) {
            logger.closingChannel(channel, error);
            try {
                channel.close();
            } catch (IOException ignore) {
            }
        }

        public void handleEnd(final Channel channel) {
            logger.closingChannelOnChannelEnd(channel);
            try {
                channel.close();
            } catch (IOException ignore) {
            }
        }
    }
}