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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "asynchandler.h"
#include "persistenceutil.h"
#include "testandsethelper.h"
#include <vespa/persistence/spi/persistenceprovider.h>
#include <vespa/document/update/documentupdate.h>
#include <vespa/vespalib/util/isequencedtaskexecutor.h>
#include <vespa/vespalib/util/destructor_callbacks.h>
namespace storage {
namespace {
class ResultTask : public vespalib::Executor::Task {
public:
ResultTask() : _result(), _resultHandler(nullptr) {}
void setResult(spi::Result::UP result) {
_result = std::move(result);
}
void addResultHandler(const spi::ResultHandler *resultHandler) {
// Only handles a single handler now,
// Can be extended if necessary later on
assert(_resultHandler == nullptr);
_resultHandler = resultHandler;
}
void handle(const spi::Result &result) {
if (_resultHandler != nullptr) {
_resultHandler->handle(result);
}
}
protected:
spi::Result::UP _result;
private:
const spi::ResultHandler *_resultHandler;
};
template<class FunctionType>
class LambdaResultTask : public ResultTask {
public:
explicit LambdaResultTask(FunctionType &&func)
: _func(std::move(func))
{}
~LambdaResultTask() override = default;
void run() override {
handle(*_result);
_func(std::move(_result));
}
private:
FunctionType _func;
};
template<class FunctionType>
std::unique_ptr<ResultTask>
makeResultTask(FunctionType &&function) {
return std::make_unique<LambdaResultTask<std::decay_t<FunctionType>>>
(std::forward<FunctionType>(function));
}
class ResultTaskOperationDone : public spi::OperationComplete {
public:
ResultTaskOperationDone(vespalib::ISequencedTaskExecutor & executor, document::BucketId bucketId,
std::unique_ptr<ResultTask> task)
: _executor(executor),
_task(std::move(task)),
_executorId(executor.getExecutorId(bucketId.getId()))
{
}
void onComplete(spi::Result::UP result) override {
_task->setResult(std::move(result));
_executor.executeTask(_executorId, std::move(_task));
}
void addResultHandler(const spi::ResultHandler * resultHandler) override {
_task->addResultHandler(resultHandler);
}
private:
vespalib::ISequencedTaskExecutor & _executor;
std::unique_ptr<ResultTask> _task;
vespalib::ISequencedTaskExecutor::ExecutorId _executorId;
};
}
AsyncHandler::AsyncHandler(const PersistenceUtil & env, spi::PersistenceProvider & spi,
vespalib::ISequencedTaskExecutor & executor,
const document::BucketIdFactory & bucketIdFactory)
: _env(env),
_spi(spi),
_sequencedExecutor(executor),
_bucketIdFactory(bucketIdFactory)
{}
MessageTracker::UP
AsyncHandler::handleRunTask(RunTaskCommand& cmd, MessageTracker::UP tracker) const {
auto task = makeResultTask([tracker = std::move(tracker)](spi::Result::UP response) {
tracker->checkForError(*response);
tracker->sendReply();
});
spi::Bucket bucket(cmd.getBucket());
auto onDone = std::make_unique<ResultTaskOperationDone>(_sequencedExecutor, cmd.getBucketId(), std::move(task));
cmd.run(bucket, std::make_shared<vespalib::KeepAlive<decltype(onDone)>>(std::move(onDone)));
return tracker;
}
MessageTracker::UP
AsyncHandler::handlePut(api::PutCommand& cmd, MessageTracker::UP trackerUP) const
{
MessageTracker & tracker = *trackerUP;
auto& metrics = _env._metrics.put;
tracker.setMetric(metrics);
metrics.request_size.addValue(cmd.getApproxByteSize());
if (tasConditionExists(cmd) && !tasConditionMatches(cmd, tracker, tracker.context())) {
// Will also count condition parse failures etc as TaS failures, but
// those results _will_ increase the error metrics as well.
metrics.test_and_set_failed.inc();
return trackerUP;
}
spi::Bucket bucket = _env.getBucket(cmd.getDocumentId(), cmd.getBucket());
auto task = makeResultTask([tracker = std::move(trackerUP)](spi::Result::UP response) {
tracker->checkForError(*response);
tracker->sendReply();
});
_spi.putAsync(bucket, spi::Timestamp(cmd.getTimestamp()), std::move(cmd.getDocument()), tracker.context(),
std::make_unique<ResultTaskOperationDone>(_sequencedExecutor, cmd.getBucketId(), std::move(task)));
return trackerUP;
}
MessageTracker::UP
AsyncHandler::handleUpdate(api::UpdateCommand& cmd, MessageTracker::UP trackerUP) const
{
MessageTracker & tracker = *trackerUP;
auto& metrics = _env._metrics.update;
tracker.setMetric(metrics);
metrics.request_size.addValue(cmd.getApproxByteSize());
if (tasConditionExists(cmd) && !tasConditionMatches(cmd, tracker, tracker.context(), cmd.getUpdate()->getCreateIfNonExistent())) {
metrics.test_and_set_failed.inc();
return trackerUP;
}
spi::Bucket bucket = _env.getBucket(cmd.getDocumentId(), cmd.getBucket());
// Note that the &cmd capture is OK since its lifetime is guaranteed by the tracker
auto task = makeResultTask([&cmd, tracker = std::move(trackerUP)](spi::Result::UP responseUP) {
auto & response = dynamic_cast<const spi::UpdateResult &>(*responseUP);
if (tracker->checkForError(response)) {
auto reply = std::make_shared<api::UpdateReply>(cmd);
reply->setOldTimestamp(response.getExistingTimestamp());
tracker->setReply(std::move(reply));
}
tracker->sendReply();
});
_spi.updateAsync(bucket, spi::Timestamp(cmd.getTimestamp()), std::move(cmd.getUpdate()), tracker.context(),
std::make_unique<ResultTaskOperationDone>(_sequencedExecutor, cmd.getBucketId(), std::move(task)));
return trackerUP;
}
MessageTracker::UP
AsyncHandler::handleRemove(api::RemoveCommand& cmd, MessageTracker::UP trackerUP) const
{
MessageTracker & tracker = *trackerUP;
auto& metrics = _env._metrics.remove;
tracker.setMetric(metrics);
metrics.request_size.addValue(cmd.getApproxByteSize());
if (tasConditionExists(cmd) && !tasConditionMatches(cmd, tracker, tracker.context())) {
metrics.test_and_set_failed.inc();
return trackerUP;
}
spi::Bucket bucket = _env.getBucket(cmd.getDocumentId(), cmd.getBucket());
// Note that the &cmd capture is OK since its lifetime is guaranteed by the tracker
auto task = makeResultTask([&metrics, &cmd, tracker = std::move(trackerUP)](spi::Result::UP responseUP) {
auto & response = dynamic_cast<const spi::RemoveResult &>(*responseUP);
if (tracker->checkForError(response)) {
tracker->setReply(std::make_shared<api::RemoveReply>(cmd, response.wasFound() ? cmd.getTimestamp() : 0));
}
if (!response.wasFound()) {
metrics.notFound.inc();
}
tracker->sendReply();
});
_spi.removeIfFoundAsync(bucket, spi::Timestamp(cmd.getTimestamp()), cmd.getDocumentId(), tracker.context(),
std::make_unique<ResultTaskOperationDone>(_sequencedExecutor, cmd.getBucketId(), std::move(task)));
return trackerUP;
}
bool
AsyncHandler::is_async_message(api::MessageType::Id type_id) noexcept
{
switch (type_id) {
case api::MessageType::PUT_ID:
case api::MessageType::UPDATE_ID:
case api::MessageType::REMOVE_ID:
return true;
default:
return false;
}
}
bool
AsyncHandler::tasConditionExists(const api::TestAndSetCommand & cmd) {
return cmd.getCondition().isPresent();
}
bool
AsyncHandler::tasConditionMatches(const api::TestAndSetCommand & cmd, MessageTracker & tracker,
spi::Context & context, bool missingDocumentImpliesMatch) const {
try {
TestAndSetHelper helper(_env, _spi, _bucketIdFactory, cmd, missingDocumentImpliesMatch);
auto code = helper.retrieveAndMatch(context);
if (code.failed()) {
tracker.fail(code.getResult(), code.getMessage());
return false;
}
} catch (const TestAndSetException & e) {
auto code = e.getCode();
tracker.fail(code.getResult(), code.getMessage());
return false;
}
return true;
}
}
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