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/*
* Copyright (c) 2017-2018 Uber Technologies, Inc.
*
* Licensed 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.
*/
#include "jaegertracing/ThriftSender.h"
#include "jaegertracing/Span.h"
#include "jaegertracing/Tag.h"
#include "jaegertracing/Tracer.h"
#include <algorithm>
#include <cstdint>
#include <iostream>
#include <iterator>
#include <thrift/transport/TBufferTransports.h>
#ifdef _MSC_VER
#pragma warning(disable : 4267) // Conversion from unsigned to signed. It
// should not be a problem here.
#endif
namespace jaegertracing {
namespace net {
class IPAddress;
} // namespace net
namespace {
constexpr auto kEmitBatchOverhead = 30;
} // anonymous namespace
ThriftSender::ThriftSender(std::unique_ptr<utils::Transport>&& transporter)
: _transporter(std::move(transporter))
, _maxSpanBytes(0)
, _byteBufferSize(0)
, _processByteSize(0)
, _protocolFactory(_transporter->protocolFactory())
, _thriftBuffer(new apache::thrift::transport::TMemoryBuffer())
{
}
int ThriftSender::append(const Span& span)
{
if (_process.serviceName.empty()) {
const auto& tracer = static_cast<const Tracer&>(span.tracer());
_process.serviceName = tracer.serviceName();
const auto& tracerTags = tracer.tags();
std::vector<thrift::Tag> thriftTags;
thriftTags.reserve(tracerTags.size());
std::transform(std::begin(tracerTags),
std::end(tracerTags),
std::back_inserter(thriftTags),
[](const Tag& tag) {
thrift::Tag thriftTag;
tag.thrift(thriftTag);
return thriftTag;
});
_process.__set_tags(thriftTags);
_processByteSize = calcSizeOfSerializedThrift(_process);
_maxSpanBytes =
_transporter->maxPacketSize() - _processByteSize - kEmitBatchOverhead;
}
thrift::Span jaegerSpan;
span.thrift(jaegerSpan);
const auto spanSize = calcSizeOfSerializedThrift(jaegerSpan);
if (spanSize > _maxSpanBytes) {
std::ostringstream oss;
throw Sender::Exception("Span is too large", 1);
}
_byteBufferSize += spanSize;
if (_byteBufferSize <= _maxSpanBytes) {
_spanBuffer.push_back(jaegerSpan);
if (_byteBufferSize < _maxSpanBytes) {
return 0;
}
return flush();
}
// Flush currently full buffer, then append this span to buffer.
const auto flushed = flush();
_spanBuffer.push_back(jaegerSpan);
_byteBufferSize = spanSize + _processByteSize;
return flushed;
}
int ThriftSender::flush()
{
if (_spanBuffer.empty()) {
return 0;
}
thrift::Batch batch;
batch.__set_process(_process);
batch.__set_spans(_spanBuffer);
try {
_transporter->emitBatch(batch);
} catch (const std::system_error& ex) {
std::ostringstream oss;
oss << "Could not send span " << ex.what()
<< ", code=" << ex.code().value();
throw Sender::Exception(oss.str(), _spanBuffer.size());
} catch (const std::exception& ex) {
std::ostringstream oss;
oss << "Could not send span " << ex.what();
throw Sender::Exception(oss.str(), _spanBuffer.size());
} catch (...) {
throw Sender::Exception("Could not send span, unknown error",
_spanBuffer.size());
}
resetBuffers();
return batch.spans.size();
}
} // namespace jaegertracing
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