86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#ifndef THRIFT_TEST_LOADGEN_TERMINALMONITOR_H_
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#define THRIFT_TEST_LOADGEN_TERMINALMONITOR_H_ 1
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#include "thrift/lib/cpp/test/loadgen/Monitor.h"
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namespace apache { namespace thrift { namespace loadgen {
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/**
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* A Monitor object that prints statistics to a terminal.
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*
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* It handles printing header lines, and re-printing the header whenever it
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* scrolls off of the screen.
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*/
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class TerminalMonitor : public Monitor {
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public:
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TerminalMonitor();
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virtual void redisplay(uint64_t intervalUsec);
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/**
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* Initialize monitoring information.
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*
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* This method is called immediately after all of the Workers have started,
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* just before the initial monitoring interval. It can be used to get
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* initial counter values from all of the Workers, so that statistics
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* reported in the first call to printInfo() are accurate.
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*
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* If subclasses override initializeInfo(), they should make sure to call
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* TerminalMonitor::initializeInfo() in their method.
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*/
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virtual void initializeInfo();
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/**
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* Print header lines.
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*
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* This is called when monitoring first starts. If the screen height can
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* be determined, this is also called every time the previous header scrolls
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* off the screen.
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*
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* @return Returns the number of lines printed.
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*/
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virtual uint32_t printHeader() = 0;
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/**
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* Print monitoring information.
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*
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* This is called once every specified interval.
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*
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* @param intervalUsec The number of microseconds since the previous call to
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* printInfo(). The first time printInfo() is called,
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* this is the number of microseconds since
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* initializeInfo() was called.
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*
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* @return Returns the number of lines printed.
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*/
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virtual uint32_t printInfo(uint64_t intervalUsec) = 0;
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protected:
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int32_t getScreenHeight();
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int32_t screenHeight_;
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uint32_t linesPrinted_;
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};
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}}} // apache::thrift::loadgen
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#endif // THRIFT_TEST_LOADGEN_TERMINALMONITOR_H_
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