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<?php |
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/* |
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* Copyright (c) 2012-2014 Janos Szurovecz |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy of |
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* this software and associated documentation files (the "Software"), to deal in |
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* the Software without restriction, including without limitation the rights to |
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies |
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* of the Software, and to permit persons to whom the Software is furnished to do |
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* so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in all |
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* copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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namespace predaddy\messagehandling\interceptors; |
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use precore\lang\Object; |
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use predaddy\messagehandling\DispatchInterceptor; |
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use predaddy\messagehandling\InterceptorChain; |
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use predaddy\messagehandling\NonBlockable; |
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/** |
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* It can block and buffer messages in blocking mode. Its state can be configured with start and stop methods. |
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* The collected messages can be flushed or cleared according to the needs. |
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* |
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* <p> The control can be done by a manager object, which is also an interceptor. |
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* It should be used if two buses should work together. |
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* For instance in a CQRS environment all events can be buffered until the command is processed. |
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* |
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* <p> If the message implements {@link NonBlockable} interface, it will never be buffered. |
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* |
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* @author Janos Szurovecz <[email protected]> |
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*/ |
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final class BlockerInterceptor extends Object implements DispatchInterceptor |
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{ |
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private $blocking = false; |
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/** |
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* @var InterceptorChain[] |
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*/ |
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private $chains = []; |
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/** |
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* @var BlockerInterceptorManager |
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*/ |
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private $manager; |
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public function __construct() |
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{ |
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$this->manager = new BlockerInterceptorManager($this); |
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} |
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public function invoke($message, InterceptorChain $chain) |
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{ |
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if ($this->blocking && !($message instanceof NonBlockable)) { |
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$this->chains[] = $chain; |
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} else { |
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$chain->proceed(); |
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} |
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} |
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public function startBlocking() |
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{ |
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$this->blocking = true; |
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self::getLogger()->debug('Message blocking has been started'); |
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} |
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public function stopBlocking() |
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{ |
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$this->blocking = false; |
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self::getLogger()->debug('Message blocking has been stopped'); |
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} |
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public function flush() |
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{ |
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$chains = $this->chains; |
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$this->chains = []; |
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foreach ($chains as $chain) { |
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$chain->proceed(); |
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} |
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self::getLogger()->debug('Blocked chains have been flushed, {} item(s) was sent', [count($chains)]); |
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} |
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public function clear() |
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{ |
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$this->chains = []; |
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self::getLogger()->debug('Blocked chains have been cleared'); |
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} |
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/** |
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* @return BlockerInterceptorManager |
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*/ |
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public function manager() |
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{ |
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return $this->manager; |
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} |
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} |
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szjani /
predaddy
