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
  13 import java.util.regex.Matcher;
  14 import java.util.regex.Pattern;
  15
  16 public class ShardIdentifier {
  17     private final String shardName;
  18     private final String memberName;
  19     private final String type;
  20
  21     //format and pattern should be in sync
  22     private final String format = "%s-shard-%s-%s";
  23     private static final Pattern pattern = Pattern.compile("(\\S+)-shard-(\\S+)-(\\S+)");
  24
  25     public ShardIdentifier(String shardName, String memberName, String type) {
  26
  27         Preconditions.checkNotNull(shardName, "shardName should not be null");
  28         Preconditions.checkNotNull(memberName, "memberName should not be null");
  29         Preconditions.checkNotNull(type, "type should not be null");
  30
  31         this.shardName = shardName;
  32         this.memberName = memberName;
  33         this.type = type;
  34     }
  35
  36     @Override
  37     public boolean equals(Object o) {
  38         if (this == o) {
  39             return true;
  40         }
  41         if (o == null || getClass() != o.getClass()) {
  42             return false;
  43         }
  44
  45         ShardIdentifier that = (ShardIdentifier) o;
  46
  47         if (!memberName.equals(that.memberName)) {
  48             return false;
  49         }
  50         if (!shardName.equals(that.shardName)) {
  51             return false;
  52         }
  53         if (!type.equals(that.type)) {
  54             return false;
  55         }
  56
  57         return true;
  58     }
  59
  60     @Override
  61     public int hashCode() {
  62         int result = shardName.hashCode();
  63         result = 31 * result + memberName.hashCode();
  64         result = 31 * result + type.hashCode();
  65         return result;
  66     }
  67
  68     @Override public String toString() {
  69         //ensure the output of toString matches the pattern above
  70         return new StringBuilder(memberName)
  71                     .append("-shard-")
  72                     .append(shardName)
  73                     .append("-")
  74                     .append(type)
  75                     .toString();
  76     }
  77
  78     public static Builder builder(){
  79         return new Builder();
  80     }
  81
  82     public String getShardName() {
  83         return shardName;
  84     }
  85
  86     public String getMemberName() {
  87         return memberName;
  88     }
  89
  90     public String getType() {
  91         return type;
  92     }
  93
  94     public static class Builder {
  95         private String shardName;
  96         private String memberName;
  97         private String type;
  98
  99         public ShardIdentifier build(){
 100             return new ShardIdentifier(shardName, memberName, type);
 101         }
 102
 103         public Builder shardName(String shardName){
 104             this.shardName = shardName;
 105             return this;
 106         }
 107
 108         public Builder memberName(String memberName){
 109             this.memberName = memberName;
 110             return this;
 111         }
 112
 113         public Builder type(String type){
 114             this.type = type;
 115             return this;
 116         }
 117
 118         public Builder fromShardIdString(String shardId){
 119             Matcher matcher = pattern.matcher(shardId);
 120
 121             if (matcher.matches()) {
 122                 memberName = matcher.group(1);
 123                 shardName = matcher.group(2);
 124                 type = matcher.group(3);
 125             }
 126             return this;
 127         }
 128     }
 129 }