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rocksdb/thrift/lib/cpp/test/loadgen/Monitor.h

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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.
*/
#ifndef THRIFT_TEST_LOADGEN_MONITOR_H_
#define THRIFT_TEST_LOADGEN_MONITOR_H_ 1
#include <boost/shared_ptr.hpp>
#include <vector>
#include <stdint.h>
namespace apache { namespace thrift { namespace loadgen {
class ScoreBoard;
class Monitor {
public:
Monitor() {}
virtual ~Monitor() {}
/**
* Create a new ScoreBoard object.
*
* This method will be called once for each worker thread. All calls to
* newScoreBoard() will be made before run() is invoked.
*
* For each Worker, newScoreBoard() will be called in the thread that will
* run that worker. However, the caller holds a lock and ensures that it
* will only be called in one thread at a time, so newScoreBoard() doesn't
* need to perform any locking internally.
*
* @param id The id of the Worker that will use this ScoreBoard.
*/
virtual boost::shared_ptr<ScoreBoard> newScoreBoard(int id) = 0;
/**
* Initialize monitoring information.
*
* This method is called once when the workers start, just before the initial
* monitoring interval. It can be used to get initial counter values from
* all of the Workers, so that statistics reported in the first call to
* redisplay() are accurate.
*/
virtual void initializeInfo() {}
/**
* Redisplay the monitor information.
*
* @param intervalUsec The number of microseconds since the last call to
* redisplay() or initializeInfo().
*/
virtual void redisplay(uint64_t intervalUsec) = 0;
};
}}} // apache::thrift::loadgen
#endif // THRIFT_TEST_LOADGEN_MONITOR_H_