mirror of
https://github.com/FairRootGroup/FairMQ.git
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70 lines
2.7 KiB
C++
70 lines
2.7 KiB
C++
/********************************************************************************
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* Copyright (C) 2014 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH *
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* *
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* This software is distributed under the terms of the *
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* GNU Lesser General Public Licence (LGPL) version 3, *
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* copied verbatim in the file "LICENSE" *
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********************************************************************************/
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#include <fairmq/Device.h>
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#include <fairmq/runDevice.h>
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#include <string>
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namespace bpo = boost::program_options;
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struct Sampler : fair::mq::Device
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{
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void InitTask() override
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{
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// Get the fText and fMaxIterations values from the command line options (via fConfig)
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fText = fConfig->GetProperty<std::string>("text");
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fMaxIterations = fConfig->GetProperty<uint64_t>("max-iterations");
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}
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bool ConditionalRun() override
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{
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// create a copy of the data with new(), that will be deleted after the transfer is complete
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std::string* text = new std::string(fText);
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// create message object with a pointer to the data buffer, its size,
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// custom deletion function (called when transfer is done),
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// and pointer to the object managing the data buffer
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FairMQMessagePtr msg(NewMessage(
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const_cast<char*>(text->c_str()),
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text->length(),
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[](void* /*data*/, void* object) { delete static_cast<std::string*>(object); },
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text));
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LOG(info) << "Sending \"" << fText << "\"";
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// in case of error or transfer interruption, return false to go to the Ready state
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// successfull transfer will return number of bytes transfered (can be 0 if sending an empty message).
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if (Send(msg, "data") < 0) {
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return false;
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} else if (fMaxIterations > 0 && ++fNumIterations >= fMaxIterations) {
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LOG(info) << "Configured maximum number of iterations reached. Leaving RUNNING state.";
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return false;
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}
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return true;
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}
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private:
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std::string fText;
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uint64_t fMaxIterations = 0;
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uint64_t fNumIterations = 0;
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};
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void addCustomOptions(bpo::options_description& options)
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{
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options.add_options()
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("text", bpo::value<std::string>()->default_value("Hello"), "Text to send out")
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("max-iterations", bpo::value<uint64_t>()->default_value(0), "Maximum number of iterations of Run/ConditionalRun/OnData (0 - infinite)");
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}
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std::unique_ptr<fair::mq::Device> getDevice(fair::mq::ProgOptions& /*config*/)
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{
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return std::make_unique<Sampler>();
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}
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