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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to you under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    * http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.hadoop.hbase.quotas.policies;
18  
19  import java.io.IOException;
20  import java.util.List;
21  
22  import org.apache.hadoop.fs.FileSystem;
23  import org.apache.hadoop.hbase.client.Mutation;
24  import org.apache.hadoop.hbase.quotas.SpaceLimitingException;
25  import org.apache.hadoop.hbase.quotas.SpaceViolationPolicyEnforcement;
26  
27  /**
28   * A {@link SpaceViolationPolicyEnforcement} which can be treated as a singleton. When a quota is
29   * not defined on a table or we lack quota information, we want to avoid creating a policy, keeping
30   * this path fast.
31   */
32  public class MissingSnapshotViolationPolicyEnforcement extends AbstractViolationPolicyEnforcement {
33    private static final MissingSnapshotViolationPolicyEnforcement SINGLETON =
34        new MissingSnapshotViolationPolicyEnforcement();
35  
36    private MissingSnapshotViolationPolicyEnforcement() {}
37  
38    public static SpaceViolationPolicyEnforcement getInstance() {
39      return SINGLETON;
40    }
41  
42    @Override
43    public boolean shouldCheckBulkLoads() {
44      return false;
45    }
46  
47    @Override
48    public void checkBulkLoad(FileSystem fs, List<String> paths) {}
49  
50    @Override
51    public void enable() throws IOException {}
52  
53    @Override
54    public void disable() throws IOException {}
55  
56    @Override
57    public void check(Mutation m) throws SpaceLimitingException {}
58  
59    @Override
60    public String getPolicyName() {
61      return "NoQuota";
62    }
63  }