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