mirror of
https://github.com/facebook/rocksdb.git
synced 2024-12-04 20:02:50 +00:00
80c663882a
Summary: First draft. Unit tests pass. Test Plan: unit tests attached Reviewers: heyongqiang Reviewed By: heyongqiang Differential Revision: https://reviews.facebook.net/D3969
114 lines
3.9 KiB
C++
114 lines
3.9 KiB
C++
// Copyright (c) 2006- Facebook
|
|
// Distributed under the Thrift Software License
|
|
//
|
|
// See accompanying file LICENSE or visit the Thrift site at:
|
|
// http://developers.facebook.com/thrift/
|
|
|
|
#ifndef THRIFT_ASYNC_TASYNCCHANNEL_H_
|
|
#define THRIFT_ASYNC_TASYNCCHANNEL_H_ 1
|
|
|
|
#include <tr1/functional>
|
|
#include "thrift/lib/cpp/Thrift.h"
|
|
#include "thrift/lib/cpp/transport/TTransportUtils.h"
|
|
|
|
namespace apache { namespace thrift { namespace async {
|
|
|
|
class TAsyncTransport;
|
|
|
|
/**
|
|
* TAsyncChannel defines an asynchronous API for message-based I/O.
|
|
*/
|
|
class TAsyncChannel {
|
|
public:
|
|
typedef std::tr1::function<void()> VoidCallback;
|
|
|
|
virtual ~TAsyncChannel() {}
|
|
|
|
// is the channel readable (possibly closed by the remote site)?
|
|
virtual bool readable() const = 0;
|
|
// is the channel in a good state?
|
|
virtual bool good() const = 0;
|
|
virtual bool error() const = 0;
|
|
virtual bool timedOut() const = 0;
|
|
|
|
/**
|
|
* Send a message over the channel.
|
|
*
|
|
* @return call "cob" on success, "errorCob" on fail. Caller must be ready
|
|
* for either cob to be called before return. Only one cob will be
|
|
* called and it will be called exactly once per invocation.
|
|
*/
|
|
virtual void sendMessage(
|
|
const VoidCallback& cob,
|
|
const VoidCallback& errorCob,
|
|
apache::thrift::transport::TMemoryBuffer* message) = 0;
|
|
|
|
/**
|
|
* Receive a message from the channel.
|
|
*
|
|
* @return call "cob" on success, "errorCob" on fail. Caller must be ready
|
|
* for either cob to be called before return. Only one cob will be
|
|
* called and it will be called exactly once per invocation.
|
|
*/
|
|
virtual void recvMessage(
|
|
const VoidCallback& cob,
|
|
const VoidCallback& errorCob,
|
|
apache::thrift::transport::TMemoryBuffer* message) = 0;
|
|
|
|
/**
|
|
* Send a message over the channel and receive a response.
|
|
*
|
|
* @return call "cob" on success, "errorCob" on fail. Caller must be ready
|
|
* for either cob to be called before return. Only one cob will be
|
|
* called and it will be called exactly once per invocation.
|
|
*/
|
|
virtual void sendAndRecvMessage(
|
|
const VoidCallback& cob,
|
|
const VoidCallback& errorCob,
|
|
apache::thrift::transport::TMemoryBuffer* sendBuf,
|
|
apache::thrift::transport::TMemoryBuffer* recvBuf) = 0;
|
|
|
|
/**
|
|
* Send a message over the channel, single cob version. (See above.)
|
|
*
|
|
* @return call "cob" on success or fail; channel status must be queried
|
|
* by the cob.
|
|
*/
|
|
void sendMessage(const VoidCallback& cob,
|
|
apache::thrift::transport::TMemoryBuffer* message) {
|
|
return sendMessage(cob, cob, message);
|
|
}
|
|
|
|
/**
|
|
* Receive a message from the channel, single cob version. (See above.)
|
|
*
|
|
* @return call "cob" on success or fail; channel status must be queried
|
|
* by the cob.
|
|
*/
|
|
void recvMessage(const VoidCallback& cob,
|
|
apache::thrift::transport::TMemoryBuffer* message) {
|
|
return recvMessage(cob, cob, message);
|
|
}
|
|
|
|
/**
|
|
* Send a message over the channel and receive response, single cob version.
|
|
* (See above.)
|
|
*
|
|
* @return call "cob" on success or fail; channel status must be queried
|
|
* by the cob.
|
|
*/
|
|
void sendAndRecvMessage(const VoidCallback& cob,
|
|
apache::thrift::transport::TMemoryBuffer* sendBuf,
|
|
apache::thrift::transport::TMemoryBuffer* recvBuf) {
|
|
return sendAndRecvMessage(cob, cob, sendBuf, recvBuf);
|
|
}
|
|
|
|
// TODO(dreiss): Make this nonvirtual when TFramedSocketAsyncChannel gets
|
|
// renamed to TFramedAsyncChannel.
|
|
virtual boost::shared_ptr<TAsyncTransport> getTransport() = 0;
|
|
};
|
|
|
|
}}} // apache::thrift::async
|
|
|
|
#endif // #ifndef THRIFT_ASYNC_TASYNCCHANNEL_H_
|