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Main functionality for HBase

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/**
 * 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.ipc;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

import org.apache.hadoop.hbase.HConstants;

/**
 * Annotation which decorates RPC methods to denote the relative priority among other RPCs in the
 * same server. Provides a basic notion of quality of service (QOS).
 */
@Retention(RetentionPolicy.RUNTIME)
public @interface QosPriority {
  int priority() default HConstants.NORMAL_QOS;
}