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 */
018
019package org.apache.hadoop.hbase.quotas;
020
021import org.apache.yetus.audience.InterfaceAudience;
022import org.apache.yetus.audience.InterfaceStability;
023
024/**
025 * Noop quota limiter returned when no limiter is associated to the user/table
026 */
027@InterfaceAudience.Private
028@InterfaceStability.Evolving
029class NoopQuotaLimiter implements QuotaLimiter {
030  private static QuotaLimiter instance = new NoopQuotaLimiter();
031
032  private NoopQuotaLimiter() {
033    // no-op
034  }
035
036  @Override
037  public void checkQuota(long writeReqs, long estimateWriteSize, long readReqs,
038      long estimateReadSize) throws RpcThrottlingException {
039    // no-op
040  }
041
042  @Override
043  public void grabQuota(long writeReqs, long writeSize, long readReqs, long readSize) {
044    // no-op
045  }
046
047  @Override
048  public void consumeWrite(final long size) {
049    // no-op
050  }
051
052  @Override
053  public void consumeRead(final long size) {
054    // no-op
055  }
056
057  @Override
058  public boolean isBypass() {
059    return true;
060  }
061
062  @Override
063  public long getWriteAvailable() {
064    throw new UnsupportedOperationException();
065  }
066
067  @Override
068  public long getReadAvailable() {
069    throw new UnsupportedOperationException();
070  }
071
072  @Override
073  public String toString() {
074    return "NoopQuotaLimiter";
075  }
076
077  public static QuotaLimiter get() {
078    return instance;
079  }
080}