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<?php |
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/* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* The software is based on the Axon Framework project which is |
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* licensed under the Apache 2.0 license. For more information on the Axon Framework |
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* see <http://www.axonframework.org/>. |
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* |
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* This software consists of voluntary contributions made by many individuals |
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* and is licensed under the MIT license. For more information, see |
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* <http://www.governor-framework.org/>. |
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*/ |
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namespace Governor\Framework\Saga\Annotation; |
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use Doctrine\Common\Annotations\AnnotationReader; |
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use Governor\Framework\Domain\EventMessageInterface; |
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use Governor\Framework\Common\ReflectionUtils; |
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use Governor\Framework\Annotations\SagaEventHandler; |
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/** |
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* The SagaMethodMessageHandlerInspector is using annotations to find the correct message handlers of a Saga. |
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* |
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* @author "David Kalosi" <[email protected]> |
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* @license <a href="http://www.opensource.org/licenses/mit-license.php">MIT License</a> |
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*/ |
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class SagaMethodMessageHandlerInspector |
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{ |
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private $targetSaga; |
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private $reader; |
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public function __construct($targetSaga) |
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{ |
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$this->targetSaga = $targetSaga; |
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$this->reader = new AnnotationReader(); |
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} |
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// !!! TODO use the inspector for this |
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public function getMessageHandlers(EventMessageInterface $event) |
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{ |
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$found = array(); |
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$reflectionClass = ReflectionUtils::getClass($this->targetSaga); |
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foreach (ReflectionUtils::getMethods($reflectionClass) as $method) { |
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$annot = $this->reader->getMethodAnnotation( |
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$method, |
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SagaEventHandler::class |
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); |
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if (null === $annot) { |
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continue; |
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} |
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if (0 === count($method->getParameters())) { |
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throw new \RuntimeException( |
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sprintf( |
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"Invalid method signature detected of %s::%s. ". |
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"Methods annotated with @SagaEventHandler must have exatly one parameter with the type of the message they handle. ", |
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$reflectionClass->name, |
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$method->name |
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) |
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); |
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} |
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$parameter = current($method->getParameters()); |
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if (null !== $parameter->getClass() && |
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$parameter->getClass()->name === $event->getPayloadType() |
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) { |
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$found[] = SagaMethodMessageHandler::getInstance( |
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$event, |
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$method, |
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$annot |
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); |
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} |
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} |
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return $found; |
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} |
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public function findHandlerMethod( |
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AbstractAnnotatedSaga $target, |
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EventMessageInterface $event |
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) { |
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foreach ($this->getMessageHandlers($event) as $handler) { |
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$associationValue = $handler->getAssociationValue($event); |
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if ($target->getAssociationValues()->contains($associationValue)) { |
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return $handler; |
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} |
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} |
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return SagaMethodMessageHandler::noHandlers(); |
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/* for (SagaMethodMessageHandler handler : getMessageHandlers(event)) { |
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final AssociationValue associationValue = handler.getAssociationValue(event); |
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if (target.getAssociationValues().contains(associationValue)) { |
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return handler; |
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} else if (logger.isDebugEnabled()) { |
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logger.debug( |
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"Skipping handler [{}], it requires an association value [{}:{}] that this Saga is not associated with", |
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handler.getName(), |
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associationValue.getKey(), |
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associationValue.getValue()); |
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} |
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} |
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if (logger.isDebugEnabled()) { |
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logger.debug("No suitable handler was found for event of type", event.getPayloadType().getName()); |
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} |
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return SagaMethodMessageHandler.noHandler(); */ |
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} |
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public function getSagaType() |
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{ |
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return $this->sagaType; |
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} |
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} |
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This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue.
If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress.
In this case you can add the
@ignore
PhpDoc annotation to the duplicate definition and it will be ignored.