ActiveMQ example source code file (AMQTxOperation.java)

This example ActiveMQ source code file (AMQTxOperation.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - ActiveMQ tags/keywords

activemqdestination, add_operation_type, amqtxoperation, bytesequence, bytesequence, io, ioexception, ioexception, journaltopicack, location, location, messageack, object, object, remove_operation_type

The ActiveMQ AMQTxOperation.java source code

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.activemq.store.amq;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import org.apache.activemq.broker.ConnectionContext;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.JournalTopicAck;
import org.apache.activemq.command.Message;
import org.apache.activemq.command.MessageAck;
import org.apache.activemq.kaha.impl.async.Location;
import org.apache.activemq.util.ByteSequence;
import org.apache.activemq.wireformat.WireFormat;

/**
 */
public class AMQTxOperation {

    public static final byte ADD_OPERATION_TYPE = 0;
    public static final byte REMOVE_OPERATION_TYPE = 1;
    public static final byte ACK_OPERATION_TYPE = 3;
    private byte operationType;
    private ActiveMQDestination destination;
    private Object data;
    private Location location;

    public AMQTxOperation() {
    }

    public AMQTxOperation(byte operationType, ActiveMQDestination destination, Object data, Location location) {
        this.operationType = operationType;
        this.destination = destination;
        this.data = data;
        this.location = location;

    }

    /**
     * @return the data
     */
    public Object getData() {
        return this.data;
    }

    /**
     * @param data the data to set
     */
    public void setData(Object data) {
        this.data = data;
    }

    /**
     * @return the location
     */
    public Location getLocation() {
        return this.location;
    }

    /**
     * @param location the location to set
     */
    public void setLocation(Location location) {
        this.location = location;
    }

    /**
     * @return the operationType
     */
    public byte getOperationType() {
        return this.operationType;
    }

    /**
     * @param operationType the operationType to set
     */
    public void setOperationType(byte operationType) {
        this.operationType = operationType;
    }

    public boolean replay(AMQPersistenceAdapter adapter, ConnectionContext context) throws IOException {
        boolean result = false;
        AMQMessageStore store = (AMQMessageStore)adapter.createMessageStore(destination);
        if (operationType == ADD_OPERATION_TYPE) {
            result = store.replayAddMessage(context, (Message)data, location);
        } else if (operationType == REMOVE_OPERATION_TYPE) {
            result = store.replayRemoveMessage(context, (MessageAck)data);
        } else {
            JournalTopicAck ack = (JournalTopicAck)data;
            result = ((AMQTopicMessageStore)store).replayAcknowledge(context, ack.getClientId(), ack
                .getSubscritionName(), ack.getMessageId());
        }
        return result;
    }

    public void writeExternal(WireFormat wireFormat, DataOutput dos) throws IOException {
        location.writeExternal(dos);
        ByteSequence packet = wireFormat.marshal(getData());
        dos.writeInt(packet.length);
        dos.write(packet.data, packet.offset, packet.length);
        packet = wireFormat.marshal(destination);
        dos.writeInt(packet.length);
        dos.write(packet.data, packet.offset, packet.length);
    }

    public void readExternal(WireFormat wireFormat, DataInput dis) throws IOException {
        this.location = new Location();
        this.location.readExternal(dis);
        int size = dis.readInt();
        byte[] data = new byte[size];
        dis.readFully(data);
        setData(wireFormat.unmarshal(new ByteSequence(data)));
        size = dis.readInt();
        data = new byte[size];
        dis.readFully(data);
        this.destination = (ActiveMQDestination)wireFormat.unmarshal(new ByteSequence(data));
    }
}