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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/storage/common/cluster_context.h>
#include <vespa/storage/common/messagesender.h>
#include <vespa/vespalib/stllike/string.h>
#include <vespa/vespalib/stllike/hash_map.h>
namespace storage::api {
class BucketCommand;
class BucketReply;
}
namespace storage::distributor {
class MessageTracker {
public:
class ToSend {
public:
ToSend(std::shared_ptr<api::BucketCommand> msg, uint16_t target) noexcept
: _msg(std::move(msg)), _target(target)
{}
std::shared_ptr<api::BucketCommand> _msg;
uint16_t _target;
};
explicit MessageTracker(const ClusterContext& cluster_context);
MessageTracker(MessageTracker&&) noexcept = default;
MessageTracker& operator=(MessageTracker&&) noexcept = delete;
MessageTracker(const MessageTracker &) = delete;
MessageTracker& operator=(const MessageTracker&) = delete;
~MessageTracker();
void queueCommand(std::shared_ptr<api::BucketCommand> msg, uint16_t target) {
_commandQueue.emplace_back(std::move(msg), target);
}
void reserve_more_commands(size_t sz) {
_commandQueue.reserve(_commandQueue.size() + sz);
}
void flushQueue(MessageSender& sender);
/**
If the reply is for a message that is being tracked here, returns the node the message was sent to. If not, returns (uint16_t)-1
*/
uint16_t handleReply(api::BucketReply& reply);
/**
Returns true if all messages sent have been received.
*/
bool finished() const noexcept {
return _sentMessages.empty();
}
protected:
std::vector<ToSend> _commandQueue;
// Keeps track of which node a message was sent to.
vespalib::hash_map<uint64_t, uint16_t> _sentMessages;
const ClusterContext& _cluster_ctx;
};
}
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