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rocksdb/thrift/lib/cpp/util/ServerCreatorBase.h

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/*
* 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_UTIL_SERVERCREATORBASE_H_
#define THRIFT_UTIL_SERVERCREATORBASE_H_ 1
#include "thrift/lib/cpp/util/ServerCreator.h"
namespace apache { namespace thrift {
namespace protocol {
class TProtocolFactory;
class TDuplexProtocolFactory;
}
namespace server {
class TServerEventHandler;
}
namespace util {
/**
* ServerCreatorBase is a helper class for subclass that wish to implement the
* ServerCreator interface.
*
* ServerCreatorBase provides functionality that pretty much all ServerCreators
* need. It provides default protocol settings, and also
* setServerEventHandler().
*/
class ServerCreatorBase : public ServerCreator {
public:
/**
* Use strict read by default.
*
* We should always use strict read and strict write for all new code.
* Only legacy services should allow requests without a thrift ID.
*/
static const bool DEFAULT_STRICT_READ = true;
/**
* Use strict write by default.
*/
static const bool DEFAULT_STRICT_WRITE = true;
/**
* Default string limit. Set a reasonably small value so that servers won't
* fall over when sent garbage data.
*/
static const int32_t DEFAULT_STRING_LIMIT = 256*1024*1024;
/**
* Default container limit. Set a reasonably small value so that servers
* won't fall over when sent garbage data.
*/
static const int32_t DEFAULT_CONTAINER_LIMIT = 256*1024*1024;
/**
* Set the TServerEventHandler to use with the new server.
*
* This event handler will be set on servers created by this ServerCreator.
*/
void setServerEventHandler(
const boost::shared_ptr<server::TServerEventHandler>& eventHandler) {
serverEventHandler_ = eventHandler;
}
/**
* Set whether or not TBinaryProtocol should include an identifier field.
*
* This field helps verify that incoming data is a valid thrift request,
* rather than random garbage data.
*
* This setting is ignored if you explicitly specify a TProtocolFactory to
* use. It is only honored if you let the ServerCreator create a new
* TBinaryProtocol for you.
*
* If unspecified, it defaults to true for both strictRead and strictWrite.
*
* @param strictRead Reject incoming requests that don't include a thrift
* identifier.
* @param strictWrite Send a thrift identifier in outgoing responses.
*/
void setStrictProtocol(bool strictRead, bool strictWrite);
/**
* Set the maximum string size allowed by TBinaryProtocol.
*
* This setting helps prevent TBinaryProtocol from trying to allocate an
* extremely large buffer if a request contains a bogus string length field.
*
* This setting is ignored if you explicitly specify a TProtocolFactory to
* use. It is only honored if you let the ServerCreator create a new
* TBinaryProtocol for you.
*
* If unspecified, it defaults to 256MB.
*/
void setStringSizeLimit(int32_t stringLimit);
/**
* Set the maximum container size allowed by TBinaryProtocol.
*
* This setting helps prevent TBinaryProtocol from trying to allocate an
* extremely large buffer if a request contains a bogus container length
* field. (e.g., for list, map, and set fields.)
*
* This setting is ignored if you explicitly specify a TProtocolFactory to
* use. It is only honored if you let the ServerCreator create a new
* TBinaryProtocol for you.
*
* If unspecified, it defaults to 256MB.
*/
void setContainerSizeLimit(int32_t containerLimit);
/**
* Set the protocol factory to use.
*
* This causes the ServerCreator to use the specified protocol factory.
* This overrides the TBinaryProtocol-related settings that would normally be
* used by the ServerCreator.
*/
void setProtocolFactory(const boost::shared_ptr<protocol::TProtocolFactory>&);
/**
* Set the protocol factory to use.
*
* This causes the ServerCreator to use the specified protocol factory
* to construct custom input and output protocols. This overrides the
* TBinaryProtocol-related settings that would normally be used by the
* ServerCreator.
*/
void setDuplexProtocolFactory(
const boost::shared_ptr<protocol::TDuplexProtocolFactory>&);
/**
* Create a new server.
*/
virtual boost::shared_ptr<server::TServer> createServer() = 0;
protected:
ServerCreatorBase();
/**
* Configure the TServer as desired.
*
* Subclasses should call this method in createServer().
*/
virtual void configureServer(const boost::shared_ptr<server::TServer>& srv);
/**
* Get the TProtocolFactory to use for the server.
*
* Subclasses should call this method in createServer().
*/
virtual boost::shared_ptr<protocol::TProtocolFactory> getProtocolFactory();
virtual boost::shared_ptr<protocol::TDuplexProtocolFactory>
getDuplexProtocolFactory();
bool strictRead_;
bool strictWrite_;
int32_t stringLimit_;
int32_t containerLimit_;
boost::shared_ptr<server::TServerEventHandler> serverEventHandler_;
boost::shared_ptr<protocol::TProtocolFactory> protocolFactory_;
boost::shared_ptr<protocol::TDuplexProtocolFactory> duplexProtocolFactory_;
};
}}} // apache::thrift::util
#endif // THRIFT_UTIL_SERVERCREATORBASE_H_