| /* |
| * 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.cache.wan; |
| |
| import java.util.Arrays; |
| |
| import org.apache.geode.distributed.internal.membership.InternalDistributedMember; |
| import org.apache.geode.internal.ByteArrayDataInput; |
| |
| /** |
| * This class wraps 1) DistributedMembershipID 2) ThreadID 3) SequenceID attributes which are used |
| * to uniquely identify any Region Operation like create, update, destroy etc. This helps in |
| * sequencing the events belonging to a unique producer. As an example, the EventSequenceID can be |
| * used to track the events received by <code>AsyncEventListener</code>. If the event has already |
| * been seen, <code>AsyncEventListener</code> can choose to ignore it. |
| */ |
| public class EventSequenceID { |
| /** |
| * Uniquely identifies the distributed member VM in which the Event is produced |
| */ |
| private String membershipID; |
| |
| /** |
| * Unqiuely identifies the thread producing the event |
| */ |
| private long threadID; |
| |
| /** |
| * Uniquely identifies individual event produced by a given thread |
| */ |
| private long sequenceID; |
| |
| public EventSequenceID(byte[] membershipID, long threadID, long sequenceID) { |
| // convert the byte array of membershipID to a readable string |
| Object mbr; |
| try { |
| mbr = InternalDistributedMember |
| .readEssentialData(new ByteArrayDataInput(membershipID)); |
| } catch (Exception e) { |
| mbr = Arrays.toString(membershipID); // punt and use the bytes |
| } |
| this.membershipID = mbr.toString(); |
| this.threadID = threadID; |
| this.sequenceID = sequenceID; |
| } |
| |
| public String getMembershipID() { |
| return this.membershipID; |
| } |
| |
| public long getThreadID() { |
| return this.threadID; |
| } |
| |
| public long getSequenceID() { |
| return this.sequenceID; |
| } |
| |
| public boolean equals(Object obj) { |
| if (!(obj instanceof EventSequenceID)) |
| return false; |
| |
| EventSequenceID obj2 = (EventSequenceID) obj; |
| return (this.membershipID.equals(obj2.getMembershipID()) && this.threadID == obj2.getThreadID() |
| && this.sequenceID == obj2.getSequenceID()); |
| } |
| |
| public int hashCode() { |
| StringBuilder builder = new StringBuilder(); |
| builder.append(this.membershipID); |
| builder.append(this.threadID); |
| builder.append(this.sequenceID); |
| return builder.toString().hashCode(); |
| } |
| |
| public String toString() { |
| StringBuilder builder = new StringBuilder(); |
| builder.append("membershipID: " + membershipID); |
| builder.append("; threadID: " + threadID); |
| builder.append("; sequenceID: " + sequenceID); |
| return builder.toString(); |
| } |
| |
| } |