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/*
* Phusion Passenger - https://www.phusionpassenger.com/
* Copyright (c) 2011-2018 Phusion Holding B.V.
*
* "Passenger", "Phusion Passenger" and "Union Station" are registered
* trademarks of Phusion Holding B.V.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <Core/ApplicationPool/Pool.h>
/*************************************************************************
*
* Initialization and shutdown-related code for ApplicationPool2::Pool
*
*************************************************************************/
namespace Passenger {
namespace ApplicationPool2 {
using namespace std;
using namespace boost;
Pool::Pool(Context *_context)
: context(_context),
abortLongRunningConnectionsCallback(NULL)
{
try {
systemMetricsCollector.collect(systemMetrics);
} catch (const RuntimeException &e) {
P_WARN("Unable to collect system metrics: " << e.what());
}
lifeStatus = ALIVE;
max = 6;
maxIdleTime = 60 * 1000000;
selfchecking = true;
palloc = psg_create_pool(PSG_DEFAULT_POOL_SIZE);
// The following code only serve to instantiate certain inline methods
// so that they can be invoked from gdb.
(void) GroupPtr().get();
(void) ProcessPtr().get();
(void) SessionPtr().get();
}
Pool::~Pool() {
if (lifeStatus != SHUT_DOWN) {
P_BUG("You must call Pool::destroy() before actually destroying the Pool object!");
}
psg_destroy_pool(palloc);
}
/** Must be called right after construction. */
void
Pool::initialize() {
LockGuard l(syncher);
initializeAnalyticsCollection();
initializeGarbageCollection();
}
void
Pool::initDebugging() {
LockGuard l(syncher);
debugSupport = boost::make_shared<DebugSupport>();
}
/**
* Should be called right after the agent has received
* the message to exit gracefully. This will tell processes to
* abort any long-running connections, e.g. WebSocket connections,
* because the Core::Controller has to wait until all connections are
* finished before proceeding with shutdown.
*/
void
Pool::prepareForShutdown() {
TRACE_POINT();
ScopedLock lock(syncher);
assert(lifeStatus == ALIVE);
lifeStatus = PREPARED_FOR_SHUTDOWN;
if (abortLongRunningConnectionsCallback) {
vector<ProcessPtr> processes = getProcesses(false);
foreach (ProcessPtr process, processes) {
// Ensure that the process is not immediately respawned.
process->getGroup()->options.minProcesses = 0;
abortLongRunningConnectionsCallback(process);
}
}
}
/** Must be called right before destruction. */
void
Pool::destroy() {
TRACE_POINT();
ScopedLock lock(syncher);
assert(lifeStatus == ALIVE || lifeStatus == PREPARED_FOR_SHUTDOWN);
lifeStatus = SHUTTING_DOWN;
while (!groups.empty()) {
GroupPtr *group;
groups.lookupRandom(NULL, &group);
string name = group->get()->getName().toString();
lock.unlock();
detachGroupByName(name);
lock.lock();
}
UPDATE_TRACE_POINT();
lock.unlock();
P_DEBUG("Shutting down ApplicationPool background threads...");
interruptableThreads.interrupt_and_join_all();
nonInterruptableThreads.join_all();
lock.lock();
lifeStatus = SHUT_DOWN;
UPDATE_TRACE_POINT();
verifyInvariants();
verifyExpensiveInvariants();
}
} // namespace ApplicationPool2
} // namespace Passenger
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