AppserverIo\Appserver\Core\Api\DeploymentService::loadContainerInstance PHP Method

    public function loadContainerInstance(ContainerNodeInterface $containerNode, SystemConfigurationInterface $systemConfiguration, $webappPath)
    {
        // load the service to validate the files
        /** @var \AppserverIo\Appserver\Core\Api\ConfigurationService $configurationService */
        $configurationService = $this->newService('AppserverIo\\Appserver\\Core\\Api\\ConfigurationService');
        // iterate through all server configurations (servers.xml), validate and merge them
        foreach ($this->globDir(AppEnvironmentHelper::getEnvironmentAwareGlobPattern($webappPath, 'META-INF/containers')) as $containersConfigurationFile) {
            try {
                // validate the application specific container configurations
                $configurationService->validateFile($containersConfigurationFile, null);
                // create a new containers node instance
                $containersNodeInstance = new ContainersNode();
                $containersNodeInstance->initFromFile($containersConfigurationFile);
                // load the system properties
                $properties = $this->getSystemProperties($containerNode);
                // prepare the sytsem properties
                $this->prepareSystemProperties($properties, $webappPath);
                /** @var \AppserverIo\Appserver\Core\Api\Node\ContainerNodeInterface $containerNodeInstance */
                foreach ($containersNodeInstance->getContainers() as $containerNodeInstance) {
                    // replace the properties for the found container node instance
                    $containerNodeInstance->replaceProperties($properties);
                    // query whether we've to merge or append the server node instance
                    if ($container = $systemConfiguration->getContainer($containerNodeInstance->getName())) {
                        $container->merge($containerNodeInstance);
                    } else {
                        $systemConfiguration->attachContainer($containerNodeInstance);
                    }
                }
            } catch (ConfigurationException $ce) {
                // load the logger and log the XML validation errors
                $systemLogger = $this->getInitialContext()->getSystemLogger();
                $systemLogger->error($ce->__toString());
                // additionally log a message that server configuration will be missing
                $systemLogger->critical(sprintf('Will skip app specific server configuration because of invalid file %s', $containersConfigurationFile));
            }
        }
    }