opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/identifiers/ShardIdentifier.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 java.util.regex.Matcher;
  13 import java.util.regex.Pattern;
  14
  15 public class ShardIdentifier {
  16     // This pattern needs to remain in sync with toString(), which produces
  17     // strings with corresponding to "%s-shard-%s-%s"
  18     private static final Pattern PATTERN = Pattern.compile("(\\S+)-shard-(\\S+)-(\\S+)");
  19
  20     private final String shardName;
  21     private final String memberName;
  22     private final String type;
  23
  24     public ShardIdentifier(String shardName, String memberName, String type) {
  25
  26         Preconditions.checkNotNull(shardName, "shardName should not be null");
  27         Preconditions.checkNotNull(memberName, "memberName should not be null");
  28         Preconditions.checkNotNull(type, "type should not be null");
  29
  30         this.shardName = shardName;
  31         this.memberName = memberName;
  32         this.type = type;
  33     }
  34
  35     @Override
  36     public boolean equals(Object o) {
  37         if (this == o) {
  38             return true;
  39         }
  40         if (o == null || getClass() != o.getClass()) {
  41             return false;
  42         }
  43
  44         ShardIdentifier that = (ShardIdentifier) o;
  45
  46         if (!memberName.equals(that.memberName)) {
  47             return false;
  48         }
  49         if (!shardName.equals(that.shardName)) {
  50             return false;
  51         }
  52         if (!type.equals(that.type)) {
  53             return false;
  54         }
  55
  56         return true;
  57     }
  58
  59     @Override
  60     public int hashCode() {
  61         int result = shardName.hashCode();
  62         result = 31 * result + memberName.hashCode();
  63         result = 31 * result + type.hashCode();
  64         return result;
  65     }
  66
  67     @Override public String toString() {
  68         //ensure the output of toString matches the pattern above
  69         return new StringBuilder(memberName)
  70                     .append("-shard-")
  71                     .append(shardName)
  72                     .append("-")
  73                     .append(type)
  74                     .toString();
  75     }
  76
  77     public static Builder builder(){
  78         return new Builder();
  79     }
  80
  81     public String getShardName() {
  82         return shardName;
  83     }
  84
  85     public String getMemberName() {
  86         return memberName;
  87     }
  88
  89     public String getType() {
  90         return type;
  91     }
  92
  93     public static class Builder {
  94         private String shardName;
  95         private String memberName;
  96         private String type;
  97
  98         public ShardIdentifier build(){
  99             return new ShardIdentifier(shardName, memberName, type);
 100         }
 101
 102         public Builder shardName(String shardName){
 103             this.shardName = shardName;
 104             return this;
 105         }
 106
 107         public Builder memberName(String memberName){
 108             this.memberName = memberName;
 109             return this;
 110         }
 111
 112         public Builder type(String type){
 113             this.type = type;
 114             return this;
 115         }
 116
 117         public Builder fromShardIdString(String shardId){
 118             Matcher matcher = PATTERN.matcher(shardId);
 119
 120             if (matcher.matches()) {
 121                 memberName = matcher.group(1);
 122                 shardName = matcher.group(2);
 123                 type = matcher.group(3);
 124             }
 125             return this;
 126         }
 127     }
 128 }