001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.quotas.policies;
019
020import org.apache.hadoop.hbase.client.Append;
021import org.apache.hadoop.hbase.client.Delete;
022import org.apache.hadoop.hbase.client.Increment;
023import org.apache.hadoop.hbase.client.Mutation;
024import org.apache.hadoop.hbase.client.Put;
025import org.apache.hadoop.hbase.quotas.SpaceLimitingException;
026import org.apache.hadoop.hbase.quotas.SpaceViolationPolicy;
027import org.apache.hadoop.hbase.quotas.SpaceViolationPolicyEnforcement;
028import org.apache.yetus.audience.InterfaceAudience;
029
030/**
031 * A {@link SpaceViolationPolicyEnforcement} implementation which disables all writes flowing into
032 * HBase. The enforcement counterpart to {@link SpaceViolationPolicy#NO_WRITES}.
033 */
034@InterfaceAudience.Private
035public class NoWritesViolationPolicyEnforcement extends DefaultViolationPolicyEnforcement {
036
037  @Override
038  public void enable() {
039  }
040
041  @Override
042  public void disable() {
043  }
044
045  @Override
046  public void check(Mutation m) throws SpaceLimitingException {
047    if (m instanceof Append || m instanceof Delete || m instanceof Increment || m instanceof Put) {
048      throw new SpaceLimitingException(getPolicyName(),
049        m.getClass().getSimpleName() + "s are disallowed due to a space quota.");
050    }
051  }
052
053  @Override
054  public String getPolicyName() {
055    return SpaceViolationPolicy.NO_WRITES.name();
056  }
057}