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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "transport_latch.h"
#include <vespa/vespalib/util/stringfmt.h>
using vespalib::make_string;
using storage::spi::Result;
using storage::spi::RemoveResult;
namespace proton {
std::unique_ptr<std::mutex> createOptionalLock(bool needLocking) {
return needLocking
? std::make_unique<std::mutex>()
: std::unique_ptr<std::mutex>();
}
TransportMerger::TransportMerger(bool needLocking)
: _result(),
_lock(createOptionalLock(needLocking))
{
}
TransportMerger::~TransportMerger() = default;
void
TransportMerger::mergeResult(ResultUP result, bool documentWasFound) {
if (_lock) {
std::lock_guard<std::mutex> guard(*_lock);
mergeWithLock(std::move(result), documentWasFound);
} else {
mergeWithLock(std::move(result), documentWasFound);
}
}
Result::UP
TransportMerger::merge(ResultUP accum, ResultUP incoming, bool documentWasFound) {
return documentWasFound ? std::move(incoming) : std::move(accum);
}
void
TransportMerger::mergeWithLock(ResultUP result, bool documentWasFound) {
if (!_result) {
_result = std::move(result);
} else if (result->hasError()) {
_result = std::make_unique<Result>(mergeErrorResults(*_result, *result));
} else {
_result = merge(std::move(_result), std::move(result), documentWasFound);
}
completeIfDone();
}
Result
TransportMerger::mergeErrorResults(const Result &lhs, const Result &rhs)
{
Result::ErrorType error = (lhs.getErrorCode() > rhs.getErrorCode() ? lhs : rhs).getErrorCode();
return Result(error, make_string("%s, %s", lhs.getErrorMessage().c_str(), rhs.getErrorMessage().c_str()));
}
TransportLatch::TransportLatch(uint32_t cnt)
: TransportMerger(cnt > 1),
_latch(cnt)
{
if (cnt == 0u) {
_result = std::make_unique<Result>();
}
}
TransportLatch::~TransportLatch() = default;
void
TransportLatch::send(ResultUP result, bool documentWasFound)
{
mergeResult(std::move(result), documentWasFound);
_latch.countDown();
}
AsyncTransportContext::AsyncTransportContext(uint32_t cnt, OperationComplete::UP onComplete)
: TransportMerger(cnt > 1),
_countDown(cnt),
_onComplete(std::move(onComplete))
{
if (cnt == 0u) {
_onComplete->onComplete(std::make_unique<Result>());
}
}
void
AsyncTransportContext::completeIfDone() {
_countDown--;
if (_countDown == 0) {
_onComplete->onComplete(std::move(_result));
}
}
AsyncTransportContext::~AsyncTransportContext() = default;
void
AsyncTransportContext::send(ResultUP result, bool documentWasFound)
{
mergeResult(std::move(result), documentWasFound);
}
Result::UP
AsyncRemoveTransportContext::merge(ResultUP accum, ResultUP incoming, bool) {
// TODO This can be static cast if necessary.
dynamic_cast<RemoveResult *>(accum.get())->inc_num_removed(dynamic_cast<RemoveResult *>(incoming.get())->num_removed());
return accum;
}
} // proton
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