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, long estimateWriteCapacityUnit, long estimateReadCapacityUnit)
039      throws RpcThrottlingException {
040    // no-op
041  }
042
043  @Override
044  public void grabQuota(long writeReqs, long writeSize, long readReqs, long readSize,
045      long writeCapacityUnit, long readCapacityUnit) {
046    // no-op
047  }
048
049  @Override
050  public void consumeWrite(final long size, long capacityUnit) {
051    // no-op
052  }
053
054  @Override
055  public void consumeRead(final long size, long capacityUnit) {
056    // no-op
057  }
058
059  @Override
060  public boolean isBypass() {
061    return true;
062  }
063
064  @Override
065  public long getWriteAvailable() {
066    throw new UnsupportedOperationException();
067  }
068
069  @Override
070  public long getReadAvailable() {
071    throw new UnsupportedOperationException();
072  }
073
074  @Override
075  public String toString() {
076    return "NoopQuotaLimiter";
077  }
078
079  public static QuotaLimiter get() {
080    return instance;
081  }
082}