| /* |
| * 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.geode.internal.cache; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| import org.apache.geode.cache.TransactionId; |
| import org.apache.geode.distributed.internal.membership.InternalDistributedMember; |
| import org.apache.geode.internal.DSFIDFactory; |
| import org.apache.geode.internal.ExternalizableDSFID; |
| import org.apache.geode.internal.InternalDataSerializer; |
| import org.apache.geode.internal.serialization.DeserializationContext; |
| import org.apache.geode.internal.serialization.KnownVersion; |
| import org.apache.geode.internal.serialization.SerializationContext; |
| |
| /** |
| * The implementation of the {@link TransactionId} interface stored in the transaction state and |
| * used, among other things, to uniquely identify a transaction in a confederation of transaction |
| * participants (currently VM in a Distributed System). |
| * |
| * @since GemFire 4.0 |
| * @see TXManagerImpl#begin |
| * @see org.apache.geode.cache.CacheTransactionManager#getTransactionId |
| */ |
| public class TXId extends ExternalizableDSFID implements TransactionId { |
| |
| /** The domain of a transaction, currently the VM's unique identifier */ |
| private InternalDistributedMember memberId; |
| /** Per unique identifier within the transactions memberId */ |
| private int uniqId; |
| |
| /** |
| * Default constructor meant for the Externalizable |
| */ |
| public TXId() {} |
| |
| /** |
| * Constructor for the Transation Manager, the birth place of TXId objects. The object is |
| * Serializable mainly because of the identifier type provided by JGroups. |
| */ |
| public TXId(InternalDistributedMember memberId, int uniqId) { |
| this.memberId = memberId; |
| this.uniqId = uniqId; |
| } |
| |
| @Override |
| public InternalDistributedMember getMemberId() { |
| return this.memberId; |
| } |
| |
| @Override |
| public String toString() { |
| return ("TXId: " + this.memberId + ':' + this.uniqId); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| |
| if (!(o instanceof TXId)) { |
| return false; |
| } |
| |
| TXId otx = (TXId) o; |
| return (otx.uniqId == this.uniqId && ((otx.memberId == null && this.memberId == null) |
| || (otx.memberId != null && this.memberId != null && otx.memberId.equals(this.memberId)))); |
| |
| } |
| |
| @Override |
| public int hashCode() { |
| int retval = this.uniqId; |
| if (this.memberId != null) |
| retval = retval * 37 + this.memberId.hashCode(); |
| return retval; |
| } |
| |
| @Override |
| public int getDSFID() { |
| return TRANSACTION_ID; |
| } |
| |
| @Override |
| public void toData(DataOutput out, |
| SerializationContext context) throws IOException { |
| out.writeInt(this.uniqId); |
| InternalDataSerializer.invokeToData(this.memberId, out); |
| } |
| |
| @Override |
| public void fromData(DataInput in, |
| DeserializationContext context) throws IOException, ClassNotFoundException { |
| this.uniqId = in.readInt(); |
| this.memberId = DSFIDFactory.readInternalDistributedMember(in); |
| } |
| |
| public static TXId createFromData(DataInput in) throws IOException, ClassNotFoundException { |
| TXId result = new TXId(); |
| InternalDataSerializer.invokeFromData(result, in); |
| return result; |
| } |
| |
| public int getUniqId() { |
| return this.uniqId; |
| } |
| |
| @Override |
| public KnownVersion[] getSerializationVersions() { |
| return null; |
| } |
| |
| } |