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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
* @file internal.h
*
* Internal commands, used in storage. These are commands that don't need to
* be serialized as they never leave a node, implemented within storage itself
* to be able to include storage types not defined in the API.
*
* Historically these messages also existed so we could alter internal messages
* without recompiling clients, but currently no clients use storage API for
* communication anymore so this is no longer an issue.
*/
#pragma once
#include <vespa/storageapi/messageapi/storagecommand.h>
#include <vespa/storageapi/messageapi/storagereply.h>
namespace storage::api {
/**
* @class InternalCommand
* @ingroup message
*
* @brief Base class for commands local to a VDS node.
*
* This is the base class for internal server commands. They can not be
* serialized, so any attempt of sending such a command away from a storage
* node will fail.
*/
class InternalCommand : public StorageCommand {
uint32_t _type;
public:
InternalCommand(uint32_t type);
~InternalCommand() override;
uint32_t getType() const { return _type; }
bool callHandler(MessageHandler& h, const std::shared_ptr<StorageMessage> & m) const override {
return h.onInternal(std::static_pointer_cast<InternalCommand>(m));
}
void print(std::ostream& out, bool verbose, const std::string& indent) const override;
};
/**
* @class InternalReply
* @ingroup message
*
* @brief Response of an internal command.
*/
class InternalReply : public StorageReply {
uint32_t _type;
public:
InternalReply(uint32_t type, const InternalCommand& cmd);
~InternalReply() override;
uint32_t getType() const { return _type; }
bool callHandler(MessageHandler& h, const std::shared_ptr<StorageMessage> & m) const override {
return h.onInternalReply(std::static_pointer_cast<InternalReply>(m));
}
void print(std::ostream& out, bool verbose, const std::string& indent) const override;
};
}
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