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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.
*/
#include <algorithm>
#include <iostream>
#include "TSocketPool.h"
namespace apache { namespace thrift { namespace transport {
using namespace std;
using boost::shared_ptr;
/**
* TSocketPoolServer implementation
*
*/
TSocketPoolServer::TSocketPoolServer()
: host_(""),
port_(0),
socket_(-1),
lastFailTime_(0),
consecutiveFailures_(0) {}
/**
* Constructor for TSocketPool server
*/
TSocketPoolServer::TSocketPoolServer(const string &host, int port)
: host_(host),
port_(port),
socket_(-1),
lastFailTime_(0),
consecutiveFailures_(0) {}
/**
* TSocketPool implementation.
*
*/
TSocketPool::TSocketPool() : TSocket(),
numRetries_(1),
retryInterval_(60),
maxConsecutiveFailures_(1),
randomize_(true),
alwaysTryLast_(true) {
}
TSocketPool::TSocketPool(const vector<string> &hosts,
const vector<int> &ports) : TSocket(),
numRetries_(1),
retryInterval_(60),
maxConsecutiveFailures_(1),
randomize_(true),
alwaysTryLast_(true)
{
if (hosts.size() != ports.size()) {
GlobalOutput("TSocketPool::TSocketPool: hosts.size != ports.size");
throw TTransportException(TTransportException::BAD_ARGS);
}
for (unsigned int i = 0; i < hosts.size(); ++i) {
addServer(hosts[i], ports[i]);
}
}
TSocketPool::TSocketPool(const vector<pair<string, int> >& servers) : TSocket(),
numRetries_(1),
retryInterval_(60),
maxConsecutiveFailures_(1),
randomize_(true),
alwaysTryLast_(true)
{
for (unsigned i = 0; i < servers.size(); ++i) {
addServer(servers[i].first, servers[i].second);
}
}
TSocketPool::TSocketPool(const vector< shared_ptr<TSocketPoolServer> >& servers) : TSocket(),
servers_(servers),
numRetries_(1),
retryInterval_(60),
maxConsecutiveFailures_(1),
randomize_(true),
alwaysTryLast_(true)
{
}
TSocketPool::TSocketPool(const string& host, int port) : TSocket(),
numRetries_(1),
retryInterval_(60),
maxConsecutiveFailures_(1),
randomize_(true),
alwaysTryLast_(true)
{
addServer(host, port);
}
TSocketPool::~TSocketPool() {
vector< shared_ptr<TSocketPoolServer> >::const_iterator iter = servers_.begin();
vector< shared_ptr<TSocketPoolServer> >::const_iterator iterEnd = servers_.end();
for (; iter != iterEnd; ++iter) {
setCurrentServer(*iter);
TSocketPool::close();
}
}
void TSocketPool::addServer(const string& host, int port) {
servers_.push_back(shared_ptr<TSocketPoolServer>(new TSocketPoolServer(host, port)));
}
void TSocketPool::setServers(const vector< shared_ptr<TSocketPoolServer> >& servers) {
servers_ = servers;
}
void TSocketPool::getServers(vector< shared_ptr<TSocketPoolServer> >& servers) {
servers = servers_;
}
void TSocketPool::setNumRetries(int numRetries) {
numRetries_ = numRetries;
}
void TSocketPool::setRetryInterval(int retryInterval) {
retryInterval_ = retryInterval;
}
void TSocketPool::setMaxConsecutiveFailures(int maxConsecutiveFailures) {
maxConsecutiveFailures_ = maxConsecutiveFailures;
}
void TSocketPool::setRandomize(bool randomize) {
randomize_ = randomize;
}
void TSocketPool::setAlwaysTryLast(bool alwaysTryLast) {
alwaysTryLast_ = alwaysTryLast;
}
void TSocketPool::setCurrentServer(const shared_ptr<TSocketPoolServer> &server) {
currentServer_ = server;
host_ = server->host_;
port_ = server->port_;
socket_ = server->socket_;
}
/* TODO: without apc we ignore a lot of functionality from the php version */
void TSocketPool::open() {
if (randomize_) {
random_shuffle(servers_.begin(), servers_.end());
}
unsigned int numServers = servers_.size();
for (unsigned int i = 0; i < numServers; ++i) {
shared_ptr<TSocketPoolServer> &server = servers_[i];
bool retryIntervalPassed = (server->lastFailTime_ == 0);
bool isLastServer = alwaysTryLast_ ? (i == (numServers - 1)) : false;
// Impersonate the server socket
setCurrentServer(server);
if (isOpen()) {
// already open means we're done
return;
}
if (server->lastFailTime_ > 0) {
// The server was marked as down, so check if enough time has elapsed to retry
int elapsedTime = time(NULL) - server->lastFailTime_;
if (elapsedTime > retryInterval_) {
retryIntervalPassed = true;
}
}
if (retryIntervalPassed || isLastServer) {
for (int j = 0; j < numRetries_; ++j) {
try {
TSocket::open();
// Copy over the opened socket so that we can keep it persistent
server->socket_ = socket_;
// reset lastFailTime_ is required
if (server->lastFailTime_) {
server->lastFailTime_ = 0;
}
// success
return;
} catch (TException e) {
string errStr = "TSocketPool::open failed "+getSocketInfo()+": "+e.what();
GlobalOutput(errStr.c_str());
// connection failed
}
}
++server->consecutiveFailures_;
if (server->consecutiveFailures_ > maxConsecutiveFailures_) {
// Mark server as down
server->consecutiveFailures_ = 0;
server->lastFailTime_ = time(NULL);
}
}
}
GlobalOutput("TSocketPool::open: all connections failed");
throw TTransportException(TTransportException::NOT_OPEN);
}
void TSocketPool::close() {
if (isOpen()) {
TSocket::close();
currentServer_->socket_ = -1;
}
}
}}} // apache::thrift::transport
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