/**
    * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
    * agreements. See the NOTICE file distributed with this work for additional information regarding
    * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance with the License. You may obtain a
    * copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable
    * law or agreed to in writing, software distributed under the License is distributed on an "AS IS"
    * BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License
    * for the specific language governing permissions and limitations under the License.
   */
  
  package org.apache.hadoop.hbase.quotas;
  
  import org.apache.hadoop.hbase.classification.InterfaceAudience;
  import org.apache.hadoop.hbase.classification.InterfaceStability;
  
  /**
   * Noop quota limiter returned when no limiter is associated to the user/table
   */
  @InterfaceAudience.Private
  @InterfaceStability.Evolving
  final class NoopQuotaLimiter implements QuotaLimiter {
    private static QuotaLimiter instance = new NoopQuotaLimiter();
  
    private NoopQuotaLimiter() {
      // no-op
    }
  
    @Override
    public void checkQuota(long writeReqs, long estimateWriteSize, long readReqs,
        long estimateReadSize, long estimateWriteCapacityUnit, long estimateReadCapacityUnit)
        throws RpcThrottlingException {
      // no-op
    }
  
    @Override
    public void grabQuota(long writeReqs, long writeSize, long readReqs, long readSize,
        long writeCapacityUnit, long readCapacityUnit) {
      // no-op
    }
  
    @Override
    public void consumeWrite(final long size, long capacityUnit) {
      // no-op
    }
  
    @Override
    public void consumeRead(final long size, long capacityUnit) {
      // no-op
    }
  
    @Override
    public boolean isBypass() {
      return true;
    }
  
    @Override
    public long getWriteAvailable() {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public long getReadAvailable() {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public String toString() {
      return "NoopQuotaLimiter";
    }
  
    public static QuotaLimiter get() {
      return instance;
    }
  }