140 lines
3.3 KiB
PHP
140 lines
3.3 KiB
PHP
<?php
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/**
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* @author Robin Appelman <icewind@owncloud.com>
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*
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\Command;
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use OCP\Command\IBus;
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use OCP\Command\ICommand;
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use SuperClosure\Serializer;
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/**
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* Asynchronous command bus that uses the background job system as backend
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*/
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class AsyncBus implements IBus {
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/**
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* @var \OCP\BackgroundJob\IJobList
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*/
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private $jobList;
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/**
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* List of traits for command which require sync execution
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*
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* @var string[]
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*/
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private $syncTraits = [];
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/**
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* @param \OCP\BackgroundJob\IJobList $jobList
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*/
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function __construct($jobList) {
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$this->jobList = $jobList;
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}
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/**
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* Schedule a command to be fired
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*
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* @param \OCP\Command\ICommand | callable $command
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*/
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public function push($command) {
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if ($this->canRunAsync($command)) {
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$this->jobList->add($this->getJobClass($command), $this->serializeCommand($command));
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} else {
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$this->runCommand($command);
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}
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}
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/**
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* Require all commands using a trait to be run synchronous
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*
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* @param string $trait
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*/
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public function requireSync($trait) {
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$this->syncTraits[] = trim($trait, '\\');
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}
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/**
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* @param \OCP\Command\ICommand | callable $command
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*/
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private function runCommand($command) {
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if ($command instanceof ICommand) {
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$command->handle();
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} else {
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$command();
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}
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}
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/**
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* @param \OCP\Command\ICommand | callable $command
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* @return string
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*/
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private function getJobClass($command) {
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if ($command instanceof \Closure) {
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return 'OC\Command\ClosureJob';
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} else if (is_callable($command)) {
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return 'OC\Command\CallableJob';
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} else if ($command instanceof ICommand) {
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return 'OC\Command\CommandJob';
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} else {
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throw new \InvalidArgumentException('Invalid command');
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}
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}
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/**
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* @param \OCP\Command\ICommand | callable $command
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* @return string
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*/
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private function serializeCommand($command) {
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if ($command instanceof \Closure) {
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$serializer = new Serializer();
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return $serializer->serialize($command);
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} else if (is_callable($command) or $command instanceof ICommand) {
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return serialize($command);
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} else {
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throw new \InvalidArgumentException('Invalid command');
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}
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}
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/**
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* @param \OCP\Command\ICommand | callable $command
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* @return bool
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*/
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private function canRunAsync($command) {
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$traits = $this->getTraits($command);
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foreach ($traits as $trait) {
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if (array_search($trait, $this->syncTraits) !== false) {
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return false;
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}
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}
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return true;
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}
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/**
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* @param \OCP\Command\ICommand | callable $command
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* @return string[]
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*/
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private function getTraits($command) {
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if ($command instanceof ICommand) {
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return class_uses($command);
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} else {
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return [];
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}
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}
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}
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