001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to you under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.hadoop.hbase.quotas.policies;
018
019import java.io.IOException;
020import java.util.List;
021import org.apache.hadoop.fs.FileSystem;
022import org.apache.hadoop.hbase.client.Mutation;
023import org.apache.hadoop.hbase.quotas.SpaceLimitingException;
024import org.apache.hadoop.hbase.quotas.SpaceViolationPolicyEnforcement;
025import org.apache.yetus.audience.InterfaceAudience;
026
027/**
028 * A {@link SpaceViolationPolicyEnforcement} which can be treated as a singleton. When a quota is
029 * not defined on a table or we lack quota information, we want to avoid creating a policy, keeping
030 * this path fast.
031 */
032@InterfaceAudience.Private
033public final class MissingSnapshotViolationPolicyEnforcement
034  extends AbstractViolationPolicyEnforcement {
035  private static final MissingSnapshotViolationPolicyEnforcement SINGLETON =
036      new MissingSnapshotViolationPolicyEnforcement();
037
038  private MissingSnapshotViolationPolicyEnforcement() {}
039
040  public static SpaceViolationPolicyEnforcement getInstance() {
041    return SINGLETON;
042  }
043
044  @Override
045  public boolean shouldCheckBulkLoads() {
046    return false;
047  }
048
049  @Override
050  public void checkBulkLoad(FileSystem fs, List<String> paths) {}
051
052  @Override
053  public void enable() throws IOException {}
054
055  @Override
056  public void disable() throws IOException {}
057
058  @Override
059  public void check(Mutation m) throws SpaceLimitingException {}
060
061  @Override
062  public String getPolicyName() {
063    return "NoQuota";
064  }
065}