C++ PoolPtr类代码示例

void
Group::onSessionInitiateFailure(const ProcessPtr &process, Session *session) {
	vector<Callback> actions;

	TRACE_POINT();
	// Standard resource management boilerplate stuff...
	PoolPtr pool = getPool();
	boost::unique_lock<boost::mutex> lock(pool->syncher);
	assert(process->isAlive());
	assert(isAlive() || getLifeStatus() == SHUTTING_DOWN);

	UPDATE_TRACE_POINT();
	P_DEBUG("Could not initiate a session with process " <<
		process->inspect() << ", detaching from pool if possible");
	if (!pool->detachProcessUnlocked(process, actions)) {
		P_DEBUG("Process was already detached");
	}
	pool->fullVerifyInvariants();
	lock.unlock();
	runAllActions(actions);
}

void
SuperGroup::realDoInitialize(const Options &options, unsigned int generation) {
	vector<ComponentInfo> componentInfos;
	vector<ComponentInfo>::const_iterator it;
	ExceptionPtr exception;

	PoolPtr pool = getPool();
	
	P_TRACE(2, "Initializing SuperGroup " << inspect() << " in the background...");
	try {
		componentInfos = loadComponentInfos(options);
	} catch (const tracable_exception &e) {
		exception = copyException(e);
	}
	if (componentInfos.empty() && exception == NULL) {
		string message = "The directory " +
			options.appRoot +
			" does not seem to contain a web application.";
		boost::shared_ptr<SpawnException> spawnException =
			boost::make_shared<SpawnException>(
				message, message, false);
		exception = spawnException;
		processAndLogNewSpawnException(*spawnException, options,
			pool->getResourceLocator(), *pool->randomGenerator);
	}
	
	Pool::DebugSupportPtr debug = pool->debugSupport;
	vector<Callback> actions;
	{
		if (debug != NULL && debug->superGroup) {
			debug->debugger->send("About to finish SuperGroup initialization");
			debug->messages->recv("Proceed with initializing SuperGroup");
		}

		boost::unique_lock<boost::mutex> lock(getPoolSyncher(pool));
		this_thread::disable_interruption di;
		this_thread::disable_syscall_interruption dsi;
		NOT_EXPECTING_EXCEPTIONS();
		if (OXT_UNLIKELY(getPool() == NULL || generation != this->generation)) {
			return;
		}
		P_TRACE(2, "Initialization of SuperGroup " << inspect() << " almost done; grabbed lock");
		assert(state == INITIALIZING);
		verifyInvariants();
		
		if (componentInfos.empty()) {
			/* Somehow initialization failed. Maybe something has deleted
			 * the supergroup files while we're working.
			 */
			assert(exception != NULL);
			setState(DESTROYED);
			
			actions.reserve(getWaitlist.size());
			while (!getWaitlist.empty()) {
				const GetWaiter &waiter = getWaitlist.front();
				actions.push_back(boost::bind(waiter.callback,
					SessionPtr(), exception));
				getWaitlist.pop_front();
			}
		} else {
			for (it = componentInfos.begin(); it != componentInfos.end(); it++) {
				const ComponentInfo &info = *it;
				GroupPtr group = boost::make_shared<Group>(shared_from_this(),
					options, info);
				groups.push_back(group);
				if (info.isDefault) {
					defaultGroup = group.get();
				}
			}

			setState(READY);
			assignGetWaitlistToGroups(actions);
		}
		
		verifyInvariants();
		P_TRACE(2, "Done initializing SuperGroup " << inspect());
	}

	this_thread::disable_interruption di;
	this_thread::disable_syscall_interruption dsi;
	runAllActions(actions);
	runInitializationHooks();
}

	~Server() {
		TRACE_POINT();
		this_thread::disable_syscall_interruption dsi;
		this_thread::disable_interruption di;
		
		P_DEBUG("Shutting down helper agent...");
		prestarterThread->interrupt_and_join();
		if (messageServerThread != NULL) {
			messageServerThread->interrupt_and_join();
		}
		
		messageServer.reset();
		P_DEBUG("Destroying application pool...");
		pool->destroy();
		uninstallDiagnosticsDumper();
		pool.reset();
		poolLoop.stop();
		requestLoop.stop();
		requestHandler.reset();

		if (!options.requestSocketLink.empty()) {
			syscalls::unlink(options.requestSocketLink.c_str());
		}
		
		P_TRACE(2, "All threads have been shut down.");
	}

static void
sigint_cb(struct ev_loop *loop, ev_signal *w, int revents) {
	P_WARN("Exiting loop");
	delete handler;
	handler = NULL;
	pool->destroy();
	pool.reset();
	ev_signal_stop(loop, &sigquitwatcher);
	ev_signal_stop(loop, &sigintwatcher);
	ev_break(loop, EVBREAK_ONE);
}

	void onSigquit(ev::sig &signal, int revents) {
		requestHandler->inspect(cerr);
		cerr.flush();
		cerr << "\n" << pool->inspect();
		cerr.flush();
		cerr << "\n" << oxt::thread::all_backtraces();
		cerr.flush();
	}

	void processToXml(CommonClientContext &commonContext, SpecificContext *specificContext, const vector<string> &args) {
		TRACE_POINT();
		commonContext.requireRights(Account::INSPECT_BASIC_INFO);
		bool includeSensitiveInfo =
			commonContext.account->hasRights(Account::INSPECT_SENSITIVE_INFO) &&
			args[1] == "true";
		writeScalarMessage(commonContext.fd, pool->toXml(includeSensitiveInfo));
	}

	~Server() {
		TRACE_POINT();
		this_thread::disable_syscall_interruption dsi;
		this_thread::disable_interruption di;
		
		P_DEBUG("Shutting down helper agent...");
		prestarterThread->interrupt_and_join();
		if (messageServerThread != NULL) {
			messageServerThread->interrupt_and_join();
		}
		
		messageServer.reset();
		P_DEBUG("Destroying application pool...");
		pool->destroy();
		uninstallDiagnosticsDumper();
		pool.reset();
		poolLoop.stop();
		requestLoop.stop();
		requestHandler.reset();

		if (!options.requestSocketLink.empty()) {
			char path[PATH_MAX + 1];
			ssize_t ret;
			bool shouldUnlink;

			ret = readlink(options.requestSocketLink.c_str(), path, PATH_MAX);
			if (ret != -1) {
				path[ret] = '\0';
				// Only unlink if a new Flying Passenger instance hasn't overwritten the
				// symlink.
				// https://code.google.com/p/phusion-passenger/issues/detail?id=939
				shouldUnlink = getRequestSocketFilename() == path;
			} else {
				shouldUnlink = true;
			}

			if (shouldUnlink) {
				syscalls::unlink(options.requestSocketLink.c_str());
			}
		}
		
		P_TRACE(2, "All threads have been shut down.");
	}

	void processDetachProcess(CommonClientContext &commonContext, SpecificContext *specificContext,
		const vector<string> &args)
	{
		TRACE_POINT();
		commonContext.requireRights(Account::DETACH);
		if (pool->detachProcess((pid_t) atoi(args[1]))) {
			writeArrayMessage(commonContext.fd, "true", NULL);
		} else {
			writeArrayMessage(commonContext.fd, "false", NULL);
		}
	}

	~Server() {
		TRACE_POINT();
		this_thread::disable_syscall_interruption dsi;
		this_thread::disable_interruption di;
		
		P_DEBUG("Shutting down helper agent...");
		prestarterThread->interrupt_and_join();
		if (messageServerThread != NULL) {
			messageServerThread->interrupt_and_join();
		}
		
		messageServer.reset();
		pool->destroy();
		pool.reset();
		requestHandler.reset();
		poolLoop.stop();
		requestLoop.stop();
		
		P_TRACE(2, "All threads have been shut down.");
	}

	bool processInspect(CommonClientContext &commonContext, SpecificContext *specificContext, const vector<string> &args) {
		TRACE_POINT();
		commonContext.requireRights(Account::INSPECT_BASIC_INFO);
		if ((args.size() - 1) % 2 != 0) {
			return false;
		}

		VariantMap map;
		vector<string>::const_iterator it = args.begin(), end = args.end();
		it++;
		while (it != end) {
			const string &key = *it;
			it++;
			const string &value = *it;
			map.set(key, value);
			it++;
		}
		writeScalarMessage(commonContext.fd, pool->inspect(Pool::InspectOptions(map)));
		return true;
	}

	Server(FileDescriptor feedbackFd, const AgentOptions &_options)
		: options(_options),
		  requestLoop(true),
		  serverInstanceDir(_options.serverInstanceDir, false),
		  resourceLocator(options.passengerRoot)
	{
		TRACE_POINT();
		this->feedbackFd = feedbackFd;
		
		UPDATE_TRACE_POINT();
		generation = serverInstanceDir.getGeneration(options.generationNumber);
		startListening();
		accountsDatabase = boost::make_shared<AccountsDatabase>();
		accountsDatabase->add("_passenger-status", options.adminToolStatusPassword, false,
			Account::INSPECT_BASIC_INFO | Account::INSPECT_SENSITIVE_INFO |
			Account::INSPECT_BACKTRACES | Account::INSPECT_REQUESTS);
		accountsDatabase->add("_web_server", options.exitPassword, false, Account::EXIT);
		messageServer = boost::make_shared<MessageServer>(
			parseUnixSocketAddress(options.adminSocketAddress), accountsDatabase);
		
		createFile(generation->getPath() + "/helper_agent.pid",
			toString(getpid()), S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
		
		if (geteuid() == 0 && !options.userSwitching) {
			lowerPrivilege(options.defaultUser, options.defaultGroup);
		}

		UPDATE_TRACE_POINT();
		randomGenerator = boost::make_shared<RandomGenerator>();
		// Check whether /dev/urandom is actually random.
		// https://code.google.com/p/phusion-passenger/issues/detail?id=516
		if (randomGenerator->generateByteString(16) == randomGenerator->generateByteString(16)) {
			throw RuntimeException("Your random number device, /dev/urandom, appears to be broken. "
				"It doesn't seem to be returning random data. Please fix this.");
		}
		
		UPDATE_TRACE_POINT();
		loggerFactory = boost::make_shared<UnionStation::LoggerFactory>(options.loggingAgentAddress,
			"logging", options.loggingAgentPassword);
		spawnerFactory = boost::make_shared<SpawnerFactory>(poolLoop.safe,
			resourceLocator, generation, boost::make_shared<SpawnerConfig>(randomGenerator));
		pool = boost::make_shared<Pool>(poolLoop.safe.get(), spawnerFactory, loggerFactory,
			randomGenerator);
		pool->initialize();
		pool->setMax(options.maxPoolSize);
		//pool->setMaxPerApp(maxInstancesPerApp);
		pool->setMaxIdleTime(options.poolIdleTime * 1000000);
		
		requestHandler = boost::make_shared<RequestHandler>(requestLoop.safe,
			requestSocket, pool, options);

		messageServer->addHandler(boost::make_shared<RemoteController>(requestHandler, pool));
		messageServer->addHandler(ptr(new ExitHandler(exitEvent)));

		sigquitWatcher.set(requestLoop.loop);
		sigquitWatcher.set(SIGQUIT);
		sigquitWatcher.set<Server, &Server::onSigquit>(this);
		sigquitWatcher.start();
		
		UPDATE_TRACE_POINT();
		writeArrayMessage(feedbackFd,
			"initialized",
			getRequestSocketFilename().c_str(),
			messageServer->getSocketFilename().c_str(),
			NULL);
		
		boost::function<void ()> func = boost::bind(prestartWebApps,
			resourceLocator,
			options.defaultRubyCommand,
			options.prestartUrls
		);
		prestarterThread = ptr(new oxt::thread(
			boost::bind(runAndPrintExceptions, func, true)
		));
	}

	Server(FileDescriptor feedbackFd, const AgentOptions &_options)
		: options(_options),
		  requestLoop(true),
		  serverInstanceDir(options.webServerPid, options.tempDir, false),
		  resourceLocator(options.passengerRoot)
	{
		TRACE_POINT();
		this->feedbackFd = feedbackFd;
		
		UPDATE_TRACE_POINT();
		generation = serverInstanceDir.getGeneration(options.generationNumber);
		startListening();
		accountsDatabase = AccountsDatabase::createDefault(generation,
			options.userSwitching, options.defaultUser, options.defaultGroup);
		accountsDatabase->add("_web_server", options.messageSocketPassword, false, Account::EXIT);
		messageServer = ptr(new MessageServer(generation->getPath() + "/socket", accountsDatabase));
		
		createFile(generation->getPath() + "/helper_agent.pid",
			toString(getpid()), S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
		
		if (geteuid() == 0 && !options.userSwitching) {
			lowerPrivilege(options.defaultUser, options.defaultGroup);
		}
		
		UPDATE_TRACE_POINT();
		loggerFactory = make_shared<UnionStation::LoggerFactory>(options.loggingAgentAddress,
			"logging", options.loggingAgentPassword);
		randomGenerator = make_shared<RandomGenerator>();
		spawnerFactory = make_shared<SpawnerFactory>(poolLoop.safe,
			resourceLocator, generation, randomGenerator);
		pool = make_shared<Pool>(poolLoop.safe.get(), spawnerFactory, loggerFactory,
			randomGenerator);
		pool->setMax(options.maxPoolSize);
		//pool->setMaxPerApp(maxInstancesPerApp);
		pool->setMaxIdleTime(options.poolIdleTime * 1000000);
		
		messageServer->addHandler(make_shared<RemoteController>(pool));
		messageServer->addHandler(make_shared<BacktracesServer>());
		messageServer->addHandler(ptr(new ExitHandler(exitEvent)));

		requestHandler = make_shared<RequestHandler>(requestLoop.safe,
			requestSocket, pool, options);

		sigquitWatcher.set(requestLoop.loop);
		sigquitWatcher.set(SIGQUIT);
		sigquitWatcher.set<Server, &Server::onSigquit>(this);
		sigquitWatcher.start();
		
		UPDATE_TRACE_POINT();
		writeArrayMessage(feedbackFd,
			"initialized",
			getRequestSocketFilename().c_str(),
			messageServer->getSocketFilename().c_str(),
			NULL);
		
		function<void ()> func = boost::bind(prestartWebApps,
			resourceLocator,
			options.prestartUrls
		);
		prestarterThread = ptr(new oxt::thread(
			boost::bind(runAndPrintExceptions, func, true)
		));
	}