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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_TRANSPORT_TSOCKETPOOL_H_
#define _THRIFT_TRANSPORT_TSOCKETPOOL_H_ 1
#include <vector>
#include "TSocket.h"
namespace apache { namespace thrift { namespace transport {
/**
* Class to hold server information for TSocketPool
*
*/
class TSocketPoolServer {
public:
/**
* Default constructor for server info
*/
TSocketPoolServer();
/**
* Constructor for TSocketPool server
*/
TSocketPoolServer(const std::string &host, int port);
// Host name
std::string host_;
// Port to connect on
int port_;
// Socket for the server
int socket_;
// Last time connecting to this server failed
int lastFailTime_;
// Number of consecutive times connecting to this server failed
int consecutiveFailures_;
};
/**
* TCP Socket implementation of the TTransport interface.
*
*/
class TSocketPool : public TSocket {
public:
/**
* Socket pool constructor
*/
TSocketPool();
/**
* Socket pool constructor
*
* @param hosts list of host names
* @param ports list of port names
*/
TSocketPool(const std::vector<std::string> &hosts,
const std::vector<int> &ports);
/**
* Socket pool constructor
*
* @param servers list of pairs of host name and port
*/
TSocketPool(const std::vector<std::pair<std::string, int> >& servers);
/**
* Socket pool constructor
*
* @param servers list of TSocketPoolServers
*/
TSocketPool(const std::vector< boost::shared_ptr<TSocketPoolServer> >& servers);
/**
* Socket pool constructor
*
* @param host single host
* @param port single port
*/
TSocketPool(const std::string& host, int port);
/**
* Destroyes the socket object, closing it if necessary.
*/
virtual ~TSocketPool();
/**
* Add a server to the pool
*/
void addServer(const std::string& host, int port);
/**
* Set list of servers in this pool
*/
void setServers(const std::vector< boost::shared_ptr<TSocketPoolServer> >& servers);
/**
* Get list of servers in this pool
*/
void getServers(std::vector< boost::shared_ptr<TSocketPoolServer> >& servers);
/**
* Sets how many times to keep retrying a host in the connect function.
*/
void setNumRetries(int numRetries);
/**
* Sets how long to wait until retrying a host if it was marked down
*/
void setRetryInterval(int retryInterval);
/**
* Sets how many times to keep retrying a host before marking it as down.
*/
void setMaxConsecutiveFailures(int maxConsecutiveFailures);
/**
* Turns randomization in connect order on or off.
*/
void setRandomize(bool randomize);
/**
* Whether to always try the last server.
*/
void setAlwaysTryLast(bool alwaysTryLast);
/**
* Creates and opens the UNIX socket.
*/
void open();
/*
* Closes the UNIX socket
*/
void close();
protected:
void setCurrentServer(const boost::shared_ptr<TSocketPoolServer> &server);
/** List of servers to connect to */
std::vector< boost::shared_ptr<TSocketPoolServer> > servers_;
/** Current server */
boost::shared_ptr<TSocketPoolServer> currentServer_;
/** How many times to retry each host in connect */
int numRetries_;
/** Retry interval in seconds, how long to not try a host if it has been
* marked as down.
*/
int retryInterval_;
/** Max consecutive failures before marking a host down. */
int maxConsecutiveFailures_;
/** Try hosts in order? or Randomized? */
bool randomize_;
/** Always try last host, even if marked down? */
bool alwaysTryLast_;
};
}}} // apache::thrift::transport
#endif // #ifndef _THRIFT_TRANSPORT_TSOCKETPOOL_H_
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