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ActiveMQ example source code file (XATransactionId.java)

This example ActiveMQ source code file (XATransactionId.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

comparable, data_structure_type, data_structure_type, string, string, transactionid, util, xatransactionid, xatransactionid, xid, xid

The ActiveMQ XATransactionId.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.command;

import java.util.Arrays;
import javax.transaction.xa.Xid;
import org.apache.activemq.util.HexSupport;

/**
 * @openwire:marshaller code="112"
 * 
 */
public class XATransactionId extends TransactionId implements Xid, Comparable {

    public static final byte DATA_STRUCTURE_TYPE = CommandTypes.ACTIVEMQ_XA_TRANSACTION_ID;

    private int formatId;
    private byte[] branchQualifier;
    private byte[] globalTransactionId;

    private transient int hash;
    private transient String transactionKey;

    public XATransactionId() {
    }

    public XATransactionId(Xid xid) {
        this.formatId = xid.getFormatId();
        this.globalTransactionId = xid.getGlobalTransactionId();
        this.branchQualifier = xid.getBranchQualifier();
    }

    public byte getDataStructureType() {
        return DATA_STRUCTURE_TYPE;
    }

    public synchronized String getTransactionKey() {
        if (transactionKey == null) {
            transactionKey = "XID:" + formatId + ":" + HexSupport.toHexFromBytes(globalTransactionId) + ":"
                             + HexSupport.toHexFromBytes(branchQualifier);
        }
        return transactionKey;
    }

    public String toString() {
        return getTransactionKey();
    }

    public boolean isXATransaction() {
        return true;
    }

    public boolean isLocalTransaction() {
        return false;
    }

    /**
     * @openwire:property version=1
     */
    public int getFormatId() {
        return formatId;
    }

    /**
     * @openwire:property version=1
     */
    public byte[] getGlobalTransactionId() {
        return globalTransactionId;
    }

    /**
     * @openwire:property version=1
     */
    public byte[] getBranchQualifier() {
        return branchQualifier;
    }

    public void setBranchQualifier(byte[] branchQualifier) {
        this.branchQualifier = branchQualifier;
        this.hash = 0;
    }

    public void setFormatId(int formatId) {
        this.formatId = formatId;
        this.hash = 0;
    }

    public void setGlobalTransactionId(byte[] globalTransactionId) {
        this.globalTransactionId = globalTransactionId;
        this.hash = 0;
    }

    public int hashCode() {
        if (hash == 0) {
            hash = formatId;
            hash = hash(globalTransactionId, hash);
            hash = hash(branchQualifier, hash);
            if (hash == 0) {
                hash = 0xaceace;
            }
        }
        return hash;
    }

    private static int hash(byte[] bytes, int hash) {
        int size = bytes.length;
        for (int i = 0; i < size; i++) {
            hash ^= bytes[i] << ((i % 4) * 8);
        }
        return hash;
    }

    public boolean equals(Object o) {
        if (o == null || o.getClass() != XATransactionId.class) {
            return false;
        }
        XATransactionId xid = (XATransactionId)o;
        return xid.formatId == formatId && Arrays.equals(xid.globalTransactionId, globalTransactionId)
               && Arrays.equals(xid.branchQualifier, branchQualifier);
    }

    public int compareTo(Object o) {
        if (o == null || o.getClass() != XATransactionId.class) {
            return -1;
        }
        XATransactionId xid = (XATransactionId)o;
        return getTransactionKey().compareTo(xid.getTransactionKey());
    }

}

Other ActiveMQ examples (source code examples)

Here is a short list of links related to this ActiveMQ XATransactionId.java source code file:

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