1 /**
2  * Licensed to the Apache Software Foundation (ASF) under one
3  * or more contributor license agreements.  See the NOTICE file
4  * distributed with this work for additional information
5  * regarding copyright ownership.  The ASF licenses this file
6  * to you under the Apache License, Version 2.0 (the
7  * "License"); you may not use this file except in compliance
8  * with the License.  You may obtain a copy of the License at
9  *
10  *     http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18 
19 package org.apache.hadoop.yarn.api.records.impl.pb;
20 
21 
22 import org.apache.hadoop.classification.InterfaceAudience.Private;
23 import org.apache.hadoop.classification.InterfaceStability.Unstable;
24 import org.apache.hadoop.yarn.api.records.Resource;
25 import org.apache.hadoop.yarn.proto.YarnProtos.ResourceProto;
26 import org.apache.hadoop.yarn.proto.YarnProtos.ResourceProtoOrBuilder;
27 
28 @Private
29 @Unstable
30 public class ResourcePBImpl extends Resource {
31   ResourceProto proto = ResourceProto.getDefaultInstance();
32   ResourceProto.Builder builder = null;
33   boolean viaProto = false;
34 
ResourcePBImpl()35   public ResourcePBImpl() {
36     builder = ResourceProto.newBuilder();
37   }
38 
ResourcePBImpl(ResourceProto proto)39   public ResourcePBImpl(ResourceProto proto) {
40     this.proto = proto;
41     viaProto = true;
42   }
43 
getProto()44   public ResourceProto getProto() {
45     proto = viaProto ? proto : builder.build();
46     viaProto = true;
47     return proto;
48   }
49 
maybeInitBuilder()50   private void maybeInitBuilder() {
51     if (viaProto || builder == null) {
52       builder = ResourceProto.newBuilder(proto);
53     }
54     viaProto = false;
55   }
56 
57 
58   @Override
getMemory()59   public int getMemory() {
60     ResourceProtoOrBuilder p = viaProto ? proto : builder;
61     return (p.getMemory());
62   }
63 
64   @Override
setMemory(int memory)65   public void setMemory(int memory) {
66     maybeInitBuilder();
67     builder.setMemory((memory));
68   }
69 
70   @Override
getVirtualCores()71   public int getVirtualCores() {
72     ResourceProtoOrBuilder p = viaProto ? proto : builder;
73     return (p.getVirtualCores());
74   }
75 
76   @Override
setVirtualCores(int vCores)77   public void setVirtualCores(int vCores) {
78     maybeInitBuilder();
79     builder.setVirtualCores((vCores));
80   }
81 
82   @Override
compareTo(Resource other)83   public int compareTo(Resource other) {
84     int diff = this.getMemory() - other.getMemory();
85     if (diff == 0) {
86       diff = this.getVirtualCores() - other.getVirtualCores();
87     }
88     return diff;
89   }
90 
91 
92 }
93