| /** |
| * 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.ipc.metrics; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| |
| |
| /** |
| * |
| * This is the JMX management interface for the RPC layer. |
| * Many of the statistics are sampled and averaged on an interval |
| * which can be specified in the metrics config file. |
| * <p> |
| * For the statistics that are sampled and averaged, one must specify |
| * a metrics context that does periodic update calls. Most do. |
| * The default Null metrics context however does NOT. So if you aren't |
| * using any other metrics context then you can turn on the viewing and averaging |
| * of sampled metrics by specifying the following two lines |
| * in the hadoop-meterics.properties file: |
| * <pre> |
| * rpc.class=org.apache.hadoop.metrics.spi.NullContextWithUpdateThread |
| * rpc.period=10 |
| * </pre> |
| *<p> |
| * Note that the metrics are collected regardless of the context used. |
| * The context with the update thread is used to average the data periodically |
| * |
| */ |
| @InterfaceAudience.Private |
| public interface RpcMgtMBean { |
| |
| /** |
| * Number of RPC Operations in the last interval |
| * @return number of operations |
| */ |
| int getRpcOpsNumber(); |
| |
| /** |
| * Average time for RPC Operations in last interval |
| * @return time in msec |
| */ |
| long getRpcOpsAvgProcessingTime(); |
| |
| /** |
| * The Minimum RPC Operation Processing Time since reset was called |
| * @return time in msec |
| */ |
| long getRpcOpsAvgProcessingTimeMin(); |
| |
| |
| /** |
| * The Maximum RPC Operation Processing Time since reset was called |
| * @return time in msec |
| */ |
| long getRpcOpsAvgProcessingTimeMax(); |
| |
| |
| /** |
| * The Average RPC Operation Queued Time in the last interval |
| * @return time in msec |
| */ |
| long getRpcOpsAvgQueueTime(); |
| |
| |
| /** |
| * The Minimum RPC Operation Queued Time since reset was called |
| * @return time in msec |
| */ |
| long getRpcOpsAvgQueueTimeMin(); |
| |
| /** |
| * The Maximum RPC Operation Queued Time since reset was called |
| * @return time in msec |
| */ |
| long getRpcOpsAvgQueueTimeMax(); |
| |
| /** |
| * Reset all min max times |
| */ |
| void resetAllMinMax(); |
| |
| /** |
| * The number of open RPC conections |
| * @return the number of open rpc connections |
| */ |
| public int getNumOpenConnections(); |
| |
| /** |
| * The number of rpc calls in the queue. |
| * @return The number of rpc calls in the queue. |
| */ |
| public int getCallQueueLen(); |
| } |