TcpTransport& ConnectionPool::borrowObject(const InetSocketAddress& key) {
if (closed) {
throw new HotRodClientException("Pool is closed");
}
if (!idle.count(key) || !busy.count(key)) {
throw new HotRodClientException("Pool is closed");
}
TransportQueuePtr idleQ = idle[key];
TransportQueuePtr busyQ = busy[key];
// See if an object is readily available
TcpTransport* obj;
bool ok = idleQ->poll(obj);
for (;;) {
if (ok) {
// Check if the object is still valid, if not destroy it
if (configuration.isTestOnBorrow() && !factory->validateObject(key, *obj)) {
factory->destroyObject(key, *obj);
ok = false;
}
// We have a valid object
if (ok) {
busyQ->push(obj);
break;
}
}
// See if we can create a new one
if (busyQ->size() < configuration.getMaxActive()) {
obj = &factory->makeObject(key);
} else {
// Wait for an object to become idle
obj = idleQ->pop();
}
ok = true;
}
factory->activateObject(key, *obj);
return *obj;
}
TcpTransport& ConnectionPool::borrowObject(const InetSocketAddress& key) {
sys::ScopedLock<sys::Mutex> l(lock);
if (closed) {
throw HotRodClientException("Pool is closed");
}
if (!idle.count(key) || !busy.count(key)) {
throw HotRodClientException("Pool has no idle or no busy transports.");
}
TransportQueuePtr idleQ = idle[key];
TransportQueuePtr busyQ = busy[key];
// See if an object is readily available
TcpTransport* obj = NULL;
bool ok = idleQ->poll(obj);
if (ok) {
totalIdle--;
}
for (;;) {
if (ok) {
// Check if the object is still valid, if not destroy it
if (configuration.isTestOnBorrow() && !factory->validateObject(key, *obj)) {
factory->destroyObject(key, *obj);
ok = false;
}
// We have a valid object
if (ok) {
busyQ->push(obj);
totalActive++;
break;
}
}
// See if we can create a new one
if (idleQ->size() == 0 && //the idle queue is empty
(configuration.getMaxActive() < 0 || busyQ->size() < (size_t) configuration.getMaxActive()) && //max active not reached!
!hasReachedMaxTotal()) {
obj = &factory->makeObject(key);
} else if (hasReachedMaxTotal()) {
//max total reached. try to destroy a existing idle connection. if not possible, wait until some other connection is available.
if (tryRemoveIdle()) { //removal successful.
obj = &factory->makeObject(key);
} else {
allocationQueue.push(key);
{
sys::ScopedUnlock<sys::Mutex> u(lock);
obj = idleQ->pop();
}
totalIdle--;
}
} else {
// Wait for an object to become idle
{
sys::ScopedUnlock<sys::Mutex> u(lock);
obj = idleQ->pop();
}
totalIdle--;
}
ok = true;
}
factory->activateObject(key, *obj);
return *obj;
}