opendaylight/md-sal/cds-access-api/src/main/java/org/opendaylight/controller/cluster/access/concepts/FrontendIdentifier.java

   1 /*
   2  * Copyright (c) 2016 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 package org.opendaylight.controller.cluster.access.concepts;
   9
  10 import com.google.common.annotations.Beta;
  11 import com.google.common.base.MoreObjects;
  12 import com.google.common.base.Preconditions;
  13 import java.io.Externalizable;
  14 import java.io.IOException;
  15 import java.io.ObjectInput;
  16 import java.io.ObjectOutput;
  17 import java.util.Objects;
  18 import org.opendaylight.yangtools.concepts.Identifier;
  19
  20 /**
  21  * A cluster-wide unique identifier of a frontend type located at a cluster member.
  22  *
  23  * @author Robert Varga
  24  */
  25 @Beta
  26 public final class FrontendIdentifier<T extends FrontendType> implements Identifier {
  27     private static final class Proxy<T extends FrontendType> implements Externalizable {
  28         private static final long serialVersionUID = 1L;
  29         private MemberName memberName;
  30         private T clientType;
  31
  32         public Proxy() {
  33             // Needed for Externalizable
  34         }
  35
  36         Proxy(final MemberName memberName, final T clientType) {
  37             this.memberName = Preconditions.checkNotNull(memberName);
  38             this.clientType = Preconditions.checkNotNull(clientType);
  39         }
  40
  41         @Override
  42         public void writeExternal(ObjectOutput out) throws IOException {
  43             out.writeObject(memberName);
  44             out.writeObject(clientType);
  45         }
  46
  47         @SuppressWarnings("unchecked")
  48         @Override
  49         public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
  50             memberName = (MemberName) in.readObject();
  51             clientType = (T) in.readObject();
  52         }
  53
  54         private Object readResolve() {
  55             return new FrontendIdentifier<>(memberName, clientType);
  56         }
  57     }
  58
  59     private static final long serialVersionUID = 1L;
  60     private final MemberName memberName;
  61     private final T clientType;
  62
  63     FrontendIdentifier(final MemberName memberName, final T clientType) {
  64         this.clientType = Preconditions.checkNotNull(clientType);
  65         this.memberName = Preconditions.checkNotNull(memberName);
  66     }
  67
  68     public static <T extends FrontendType> FrontendIdentifier<T> create(MemberName memberName, final T clientType) {
  69         return new FrontendIdentifier<>(memberName, clientType);
  70     }
  71
  72     public T getClientType() {
  73         return clientType;
  74     }
  75
  76     public MemberName getMemberName() {
  77         return memberName;
  78     }
  79
  80     @Override
  81     public int hashCode() {
  82         return Objects.hash(memberName, clientType);
  83     }
  84
  85     @Override
  86     public boolean equals(final Object o) {
  87         if (this == o) {
  88             return true;
  89         }
  90         if (!(o instanceof FrontendIdentifier)) {
  91             return false;
  92         }
  93
  94         final FrontendIdentifier<?> other = (FrontendIdentifier<?>) o;
  95         return memberName.equals(other.memberName) && clientType.equals(other.clientType);
  96     }
  97
  98     @Override
  99     public String toString() {
 100         return MoreObjects.toStringHelper(FrontendIdentifier.class).add("member", memberName)
 101                 .add("clientType", clientType).toString();
 102     }
 103
 104     private Object writeReplace() {
 105         return new Proxy<>(memberName, clientType);
 106     }
 107 }