mirror of https://github.com/facebook/rocksdb.git
96 lines
3.0 KiB
C++
96 lines
3.0 KiB
C++
/*
|
|
* Licensed to the Apache Software Foundation (ASF) under one
|
|
* or more contributor license agreements. See the NOTICE file
|
|
* distributed with this work for additional information
|
|
* regarding copyright ownership. The ASF licenses this file
|
|
* to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance
|
|
* with the License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing,
|
|
* software distributed under the License is distributed on an
|
|
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
* KIND, either express or implied. See the License for the
|
|
* specific language governing permissions and limitations
|
|
* under the License.
|
|
*/
|
|
#ifndef THRIFT_ASYNC_TASYNCEVENTCHANNEL_H_
|
|
#define THRIFT_ASYNC_TASYNCEVENTCHANNEL_H_ 1
|
|
|
|
#include "thrift/lib/cpp/async/TAsyncChannel.h"
|
|
#include "thrift/lib/cpp/async/TDelayedDestruction.h"
|
|
|
|
namespace apache { namespace thrift { namespace async {
|
|
|
|
class TEventBase;
|
|
|
|
/**
|
|
* TAsyncEventChannel defines an API for TAsyncChannel objects that are driven
|
|
* by TEventBase.
|
|
*/
|
|
class TAsyncEventChannel : public TAsyncChannel,
|
|
public TDelayedDestruction {
|
|
public:
|
|
|
|
/**
|
|
* Determine if this channel is idle (i.e., has no outstanding reads or
|
|
* writes).
|
|
*/
|
|
virtual bool isIdle() const = 0;
|
|
|
|
/**
|
|
* Attach the channel to a TEventBase.
|
|
*
|
|
* This may only be called if the channel is not currently attached to a
|
|
* TEventBase (by an earlier call to detachEventBase()).
|
|
*
|
|
* This method must be invoked in the TEventBase's thread.
|
|
*/
|
|
virtual void attachEventBase(TEventBase* eventBase) = 0;
|
|
|
|
/**
|
|
* Detach the channel from its TEventBase.
|
|
*
|
|
* This may only be called when the channel is idle and has no reads or
|
|
* writes pending. Once detached, the channel may not be used again until it
|
|
* is re-attached to a TEventBase by calling attachEventBase().
|
|
*
|
|
* This method must be called from the current TEventBase's thread.
|
|
*/
|
|
virtual void detachEventBase() = 0;
|
|
|
|
/**
|
|
* Get the receive timeout.
|
|
*
|
|
* @return Returns the current receive timeout, in milliseconds. A return
|
|
* value of 0 indicates that no timeout is set.
|
|
*/
|
|
virtual uint32_t getRecvTimeout() const = 0;
|
|
|
|
/**
|
|
* Set the timeout for receiving messages.
|
|
*
|
|
* When set to a non-zero value, the entire message must be received within
|
|
* the specified number of milliseconds, or the receive will fail and the
|
|
* channel will be closed.
|
|
*/
|
|
virtual void setRecvTimeout(uint32_t milliseconds) = 0;
|
|
|
|
protected:
|
|
/**
|
|
* Protected destructor.
|
|
*
|
|
* Users of TAsyncEventChannel must never delete it directly. Instead, invoke
|
|
* destroy() instead. (See the documentation in TDelayedDestruction.h for
|
|
* more details.)
|
|
*/
|
|
|
|
virtual ~TAsyncEventChannel() { }
|
|
};
|
|
|
|
}}} // apache::thrift::async
|
|
|
|
#endif // THRIFT_ASYNC_TASYNCEVENTCHANNEL_H_
|