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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 "rpcsendadapter.h"
#include <vespa/messagebus/idiscardhandler.h>
#include <vespa/messagebus/ireplyhandler.h>
#include <vespa/messagebus/common.h>
#include <vespa/fnet/frt/invokable.h>
#include <vespa/fnet/frt/invoker.h>
class FRT_ReflectionBuilder;
namespace vespalib::slime { struct Cursor; }
namespace vespalib { struct Memory; }
namespace vespalib { class Trace; }
namespace mbus {
class Error;
class Route;
class Message;
class RPCServiceAddress;
class IProtocol;
class PayLoadFiller
{
public:
virtual ~PayLoadFiller() { }
virtual void fill(FRT_Values & v) const = 0;
virtual void fill(const vespalib::Memory & name, vespalib::slime::Cursor & v) const = 0;
};
class RPCSend : public FRT_Invokable,
public RPCSendAdapter,
public FRT_IRequestWait,
public IDiscardHandler,
public IReplyHandler
{
public:
class Params {
public:
virtual ~Params() {}
virtual vespalib::Version getVersion() const = 0;
virtual vespalib::stringref getProtocol() const = 0;
virtual uint32_t getTraceLevel() const = 0;
virtual bool useRetry() const = 0;
virtual uint32_t getRetries() const = 0;
virtual duration getRemainingTime() const = 0;
virtual vespalib::stringref getRoute() const = 0;
virtual vespalib::stringref getSession() const = 0;
virtual BlobRef getPayload() const = 0;
};
protected:
RPCNetwork *_net;
string _clientIdent;
string _serverIdent;
virtual void build(FRT_ReflectionBuilder & builder, CapabilitySet required_capabilities) = 0;
virtual std::unique_ptr<Reply> createReply(const FRT_Values & response, const string & serviceName,
Error & error, vespalib::Trace & trace) const = 0;
virtual void encodeRequest(FRT_RPCRequest &req, const vespalib::Version &version, const Route & route,
const RPCServiceAddress & address, const Message & msg, uint32_t traceLevel,
const PayLoadFiller &filler, duration timeRemaining) const = 0;
virtual const char * getReturnSpec() const = 0;
virtual void createResponse(FRT_Values & ret, const string & version, Reply & reply, Blob payload) const = 0;
virtual std::unique_ptr<Params> toParams(const FRT_Values ¶m) const = 0;
void send(RoutingNode &recipient, const vespalib::Version &version,
const PayLoadFiller & filler, duration timeRemaining);
std::unique_ptr<Reply> decode(vespalib::stringref protocol, const vespalib::Version & version,
BlobRef payload, Error & error) const;
/**
* Send an error reply for a given request.
*
* @param request The FRT request to reply to.
* @param version The version to serialize for.
* @param traceLevel The trace level to set in the reply.
* @param err The error to reply with.
*/
void replyError(FRT_RPCRequest *req, const vespalib::Version &version, uint32_t traceLevel, const Error &err);
public:
RPCSend();
~RPCSend();
void invoke(FRT_RPCRequest *req);
private:
void doRequest(FRT_RPCRequest *req);
void doRequestDone(FRT_RPCRequest *req);
void doHandleReply(std::unique_ptr<Reply> reply);
void attach(RPCNetwork &net, CapabilitySet required_capabilities) final override;
void handleDiscard(Context ctx) final override;
void sendByHandover(RoutingNode &recipient, const vespalib::Version &version,
Blob payload, duration timeRemaining) final override;
void send(RoutingNode &recipient, const vespalib::Version &version,
BlobRef payload, duration timeRemaining) final override;
void RequestDone(FRT_RPCRequest *req) final override;
void handleReply(std::unique_ptr<Reply> reply) final override;
};
} // namespace mbus
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