org.hornetq.utils.XidCodecSupport 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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/*
 * Copyright 2005-2014 Red Hat, Inc.
 * Red Hat 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.hornetq.utils;

import javax.transaction.xa.Xid;

import org.hornetq.api.core.HornetQBuffer;
import org.hornetq.core.transaction.impl.XidImpl;

/**
 * @author Jeff Mesnil
 *
 *
 */
public class XidCodecSupport
{

   // Constants -----------------------------------------------------

   // Attributes ----------------------------------------------------

   // Static --------------------------------------------------------

   public static void encodeXid(final Xid xid, final HornetQBuffer out)
   {
      out.writeInt(xid.getFormatId());
      out.writeInt(xid.getBranchQualifier().length);
      out.writeBytes(xid.getBranchQualifier());
      out.writeInt(xid.getGlobalTransactionId().length);
      out.writeBytes(xid.getGlobalTransactionId());
   }

   public static Xid decodeXid(final HornetQBuffer in)
   {
      int formatID = in.readInt();
      byte[] bq = new byte[in.readInt()];
      in.readBytes(bq);
      byte[] gtxid = new byte[in.readInt()];
      in.readBytes(gtxid);
      Xid xid = new XidImpl(bq, formatID, gtxid);
      return xid;
   }

   public static int getXidEncodeLength(final Xid xid)
   {
      return DataConstants.SIZE_INT * 3 + xid.getBranchQualifier().length + xid.getGlobalTransactionId().length;
   }

   // Constructors --------------------------------------------------

   // Public --------------------------------------------------------

   // Package protected ---------------------------------------------

   // Protected -----------------------------------------------------

   // Private -------------------------------------------------------

   // Inner classes -------------------------------------------------
}