opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/identifiers/TransactionIdentifier.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.controller.cluster.datastore.identifiers;
  10
  11 import com.google.common.base.Preconditions;
  12 import org.opendaylight.controller.cluster.access.concepts.MemberName;
  13
  14 public class TransactionIdentifier {
  15     protected static final String TX_SEPARATOR = "-txn-";
  16
  17     private final MemberName memberName;
  18     private final long counter;
  19     private final long timestamp;
  20     private String stringRepresentation;
  21
  22     public TransactionIdentifier(MemberName memberName, long counter) {
  23         this.memberName = Preconditions.checkNotNull(memberName, "memberName should not be null");
  24         this.counter = counter;
  25         this.timestamp = System.currentTimeMillis();
  26     }
  27
  28     public String getChainId() {
  29         return "";
  30     }
  31
  32     protected MemberName getMemberName() {
  33         return memberName;
  34     }
  35
  36     protected long getCounter() {
  37         return counter;
  38     }
  39
  40     protected long getTimestamp() {
  41         return timestamp;
  42     }
  43
  44     public static TransactionIdentifier create(MemberName memberName, long counter) {
  45         return new TransactionIdentifier(memberName, counter);
  46     }
  47
  48     @Override
  49     public boolean equals(Object o) {
  50         if (this == o) {
  51             return true;
  52         }
  53         if (o == null || getClass() != o.getClass()) {
  54             return false;
  55         }
  56
  57         TransactionIdentifier that = (TransactionIdentifier) o;
  58
  59         if (counter != that.counter) {
  60             return false;
  61         }
  62
  63         if (timestamp != that.timestamp) {
  64             return false;
  65         }
  66
  67         if (!memberName.equals(that.memberName)) {
  68             return false;
  69         }
  70
  71         return true;
  72     }
  73
  74     @Override
  75     public int hashCode() {
  76         int result = memberName.hashCode();
  77         result = 31 * result + (int) (counter ^ (counter >>> 32));
  78         result = 31 * result + (int)(timestamp ^ (timestamp >>> 32));
  79         return result;
  80     }
  81
  82
  83     @Override
  84     public String toString() {
  85         if(stringRepresentation == null) {
  86             stringRepresentation = new StringBuilder(memberName.getName().length() + TX_SEPARATOR.length() + 21).
  87                 append(memberName.getName()).append(TX_SEPARATOR).append(counter).append('-').append(timestamp).toString();
  88         }
  89
  90         return stringRepresentation;
  91     }
  92
  93 }