hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/NoopQuotaLimiter.java

   1 /**
   2  * Licensed to the Apache Software Foundation (ASF) under one
   3  * or more contributor license agreements.  See the NOTICE file
   4  * distributed with this work for additional information
   5  * regarding copyright ownership.  The ASF licenses this file
   6  * to you under the Apache License, Version 2.0 (the
   7  * "License"); you may not use this file except in compliance
   8  * with the License.  You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18
  19 package org.apache.hadoop.hbase.quotas;
  20
  21 import org.apache.yetus.audience.InterfaceAudience;
  22 import org.apache.yetus.audience.InterfaceStability;
  23
  24 /**
  25  * Noop quota limiter returned when no limiter is associated to the user/table
  26  */
  27 @InterfaceAudience.Private
  28 @InterfaceStability.Evolving
  29 class NoopQuotaLimiter implements QuotaLimiter {
  30   private static QuotaLimiter instance = new NoopQuotaLimiter();
  31
  32   private NoopQuotaLimiter() {
  33     // no-op
  34   }
  35
  36   @Override
  37   public void checkQuota(long writeReqs, long estimateWriteSize, long readReqs,
  38       long estimateReadSize, long estimateWriteCapacityUnit, long estimateReadCapacityUnit)
  39       throws RpcThrottlingException {
  40     // no-op
  41   }
  42
  43   @Override
  44   public void grabQuota(long writeReqs, long writeSize, long readReqs, long readSize,
  45       long writeCapacityUnit, long readCapacityUnit) {
  46     // no-op
  47   }
  48
  49   @Override
  50   public void consumeWrite(final long size, long capacityUnit) {
  51     // no-op
  52   }
  53
  54   @Override
  55   public void consumeRead(final long size, long capacityUnit) {
  56     // no-op
  57   }
  58
  59   @Override
  60   public boolean isBypass() {
  61     return true;
  62   }
  63
  64   @Override
  65   public long getWriteAvailable() {
  66     throw new UnsupportedOperationException();
  67   }
  68
  69   @Override
  70   public long getReadAvailable() {
  71     throw new UnsupportedOperationException();
  72   }
  73
  74   @Override
  75   public String toString() {
  76     return "NoopQuotaLimiter";
  77   }
  78
  79   public static QuotaLimiter get() {
  80     return instance;
  81   }
  82 }