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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "operation_sequencer.h"
#include <vespa/document/bucket/bucketid.h>
#include <vespa/document/bucket/bucketidfactory.h>
#include <vespa/vdslib/state/clusterstate.h>
#include <vespa/storage/distributor/distributorcomponent.h>
#include <vespa/storageapi/messageapi/messagehandler.h>
#include <atomic>
#include <chrono>
#include <mutex>
namespace storage {
class DistributorMetricSet;
class PersistenceOperationMetricSet;
namespace distributor {
class Distributor;
class MaintenanceOperationGenerator;
class DirectDispatchSender;
class ExternalOperationHandler : public DistributorComponent,
public api::MessageHandler
{
public:
using Clock = std::chrono::system_clock;
using TimePoint = std::chrono::time_point<Clock>;
DEF_MSG_COMMAND_H(Get);
DEF_MSG_COMMAND_H(Put);
DEF_MSG_COMMAND_H(Update);
DEF_MSG_COMMAND_H(Remove);
DEF_MSG_COMMAND_H(RemoveLocation);
DEF_MSG_COMMAND_H(StatBucket);
DEF_MSG_COMMAND_H(CreateVisitor);
DEF_MSG_COMMAND_H(GetBucketList);
ExternalOperationHandler(Distributor& owner,
DistributorBucketSpaceRepo& bucketSpaceRepo,
DistributorBucketSpaceRepo& readOnlyBucketSpaceRepo,
const MaintenanceOperationGenerator&,
DistributorComponentRegister& compReg);
~ExternalOperationHandler() override;
bool handleMessage(const std::shared_ptr<api::StorageMessage>& msg,
Operation::SP& operation);
void rejectFeedBeforeTimeReached(TimePoint timePoint) noexcept {
_rejectFeedBeforeTimeReached = timePoint;
}
// Returns true iff message was handled and should not be processed further by the caller.
bool try_handle_message_outside_main_thread(const std::shared_ptr<api::StorageMessage>& msg);
void close_pending();
void set_concurrent_gets_enabled(bool enabled) noexcept {
_concurrent_gets_enabled.store(enabled, std::memory_order_relaxed);
}
bool concurrent_gets_enabled() const noexcept {
return _concurrent_gets_enabled.load(std::memory_order_relaxed);
}
private:
std::unique_ptr<DirectDispatchSender> _direct_dispatch_sender;
const MaintenanceOperationGenerator& _operationGenerator;
OperationSequencer _mutationSequencer;
Operation::SP _op;
TimePoint _rejectFeedBeforeTimeReached;
mutable std::mutex _non_main_thread_ops_mutex;
OperationOwner _non_main_thread_ops_owner;
std::atomic<bool> _concurrent_gets_enabled;
template <typename Func>
void bounce_or_invoke_read_only_op(api::StorageCommand& cmd,
const document::Bucket& bucket,
PersistenceOperationMetricSet& metrics,
Func f);
void bounce_with_wrong_distribution(api::StorageCommand& cmd, const lib::ClusterState& cluster_state);
// Bounce with the current _default_ space cluster state.
void bounce_with_wrong_distribution(api::StorageCommand& cmd);
void bounce_with_busy_during_state_transition(api::StorageCommand& cmd,
const lib::ClusterState& current_state,
const lib::ClusterState& pending_state);
void bounce_with_result(api::StorageCommand& cmd, const api::ReturnCode& result);
std::shared_ptr<Operation> try_generate_get_operation(const std::shared_ptr<api::GetCommand>&);
bool checkSafeTimeReached(api::StorageCommand& cmd);
api::ReturnCode makeSafeTimeRejectionResult(TimePoint unsafeTime);
bool checkTimestampMutationPreconditions(
api::StorageCommand& cmd,
const document::BucketId &bucketId,
PersistenceOperationMetricSet& persistenceMetrics);
std::shared_ptr<api::StorageMessage> makeConcurrentMutationRejectionReply(
api::StorageCommand& cmd,
const document::DocumentId& docId,
PersistenceOperationMetricSet& persistenceMetrics) const;
bool allowMutation(const SequencingHandle& handle) const;
DistributorMetricSet& getMetrics() { return getDistributor().getMetrics(); }
};
}
}
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