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#include "FWCore/Framework/interface/stream/EDProducer.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/MakerMacros.h"
#include "DataFormats/TestObjects/interface/ToyProducts.h"
#include "FWCore/Utilities/interface/Exception.h"
#include <thread>
#include <chrono>
namespace edmtest {
class TransformAsyncIntStreamProducer : public edm::stream::EDProducer<edm::Transformer> {
public:
struct WorkCache {
std::shared_ptr<std::thread> thread_;
IntProduct value_;
};
TransformAsyncIntStreamProducer(edm::ParameterSet const& iPSet)
: getToken_(consumes(iPSet.getParameter<edm::InputTag>("get"))),
offset_(iPSet.getParameter<unsigned int>("offset")),
transformOffset_(iPSet.getParameter<unsigned int>("transformOffset")) {
putToken_ = produces<IntProduct>();
bool check = iPSet.getUntrackedParameter<bool>("checkTransformNotCalled");
registerTransformAsync(
putToken_,
[offset = transformOffset_, check](edm::StreamID, auto const& iFrom, auto iTask) {
if (check) {
throw cms::Exception("TransformShouldNotBeCalled");
}
WorkCache ret;
using namespace std::chrono_literals;
ret.thread_ = std::make_shared<std::thread>([iTask] { std::this_thread::sleep_for(100ms); });
ret.value_ = IntProduct(iFrom.value + offset);
return ret;
},
[](edm::StreamID, auto const& iFrom) {
iFrom.thread_->join();
return iFrom.value_;
},
"transform");
}
void produce(edm::Event& iEvent, edm::EventSetup const&) override {
iEvent.emplace(putToken_, iEvent.get(getToken_).value + offset_);
}
static void fillDescriptions(edm::ConfigurationDescriptions& desc) {
edm::ParameterSetDescription pset;
pset.add<edm::InputTag>("get");
pset.add<unsigned int>("offset", 0);
pset.add<unsigned int>("transformOffset", 1);
pset.addUntracked<bool>("checkTransformNotCalled", false);
desc.addDefault(pset);
}
private:
const edm::EDGetTokenT<IntProduct> getToken_;
edm::EDPutTokenT<IntProduct> putToken_;
const unsigned int offset_;
const unsigned int transformOffset_;
};
} // namespace edmtest
using edmtest::TransformAsyncIntStreamProducer;
DEFINE_FWK_MODULE(TransformAsyncIntStreamProducer);
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