97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
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/*
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* Copyright (c) 2009-2010 by Bjoern Kolbeck, Zuse Institute Berlin
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*
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* Licensed under the BSD License, see LICENSE file for details.
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*
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*/
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#ifndef CPP_INCLUDE_RPC_SYNC_CALLBACK_H_
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#define CPP_INCLUDE_RPC_SYNC_CALLBACK_H_
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#include <boost/thread.hpp>
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#include <stdint.h>
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#include "pbrpc/RPC.pb.h"
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#include "rpc/client_request_callback_interface.h"
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namespace xtreemfs {
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namespace rpc {
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class ClientRequest;
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class SyncCallbackBase : public ClientRequestCallbackInterface {
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public:
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SyncCallbackBase();
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virtual ~SyncCallbackBase();
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/**
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* Returns if the rpc has finished (response was received or error).
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* This operation does not block.
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* @return true, if the RPC has finished
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*/
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bool HasFinished();
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/**
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* Returns true if the request has failed. Blocks until
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* response is available.
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* @return true if an error occurred
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*/
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bool HasFailed();
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/**
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* Returns a pointer to the error or NULL if the request was successful.
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* Blocks until response is available.
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* @return pointer to ErrorResponse, caller is responsible for deleting
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* the object or calling deleteBuffers
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*/
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xtreemfs::pbrpc::RPCHeader::ErrorResponse* error();
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/**
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* Returns a pointer to the response message. Blocks until response is
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* available.
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* @return pointer to response message, caller is responsible for
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* deleting the object or calling deleteBuffers
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*/
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::google::protobuf::Message* response();
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/**
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* Returns the length of the response data or 0.
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* Blocks until response is available.
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* @return ength of the response data or 0
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*/
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uint32_t data_length();
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/**
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* Returns a pointer to the response data. Blocks until response
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* is available.
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* @return pointer to response data, caller is responsible for
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* deleting[] the data or calling deleteBuffers
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*/
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char* data();
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/**
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* Deletes the response objects (message, response, data)
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* This is not done automatically when the SyncCallback is deleted!
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*/
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void DeleteBuffers();
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/** internal callback, ignore */
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virtual void RequestCompleted(ClientRequest* rq);
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private:
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boost::mutex cond_lock_;
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boost::condition_variable response_avail_;
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ClientRequest* request_;
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void WaitForResponse();
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};
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// TODO(hupfeld): update pbrpcgen to emit dynamic types.
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template <class ReturnMessageType>
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class SyncCallback : public SyncCallbackBase {};
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} // namespace rpc
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} // namespace xtreemfs
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#endif // CPP_INCLUDE_RPC_SYNC_CALLBACK_H_
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