BatchEnvironmentProcessor.java example

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 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
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package org.wildfly.extension.batch.deployment;

import javax.enterprise.inject.spi.BeanManager;
import javax.transaction.TransactionManager;

import org.jberet.spi.ContextClassLoaderJobOperatorContextSelector;
import org.jberet.spi.JobOperatorContext;
import org.jboss.as.controller.capability.CapabilityServiceSupport;
import org.jboss.as.ee.component.EEModuleDescription;
import org.jboss.as.ee.weld.WeldDeploymentMarker;
import org.jboss.as.server.Services;
import org.jboss.as.server.deployment.Attachments;
import org.jboss.as.server.deployment.DeploymentPhaseContext;
import org.jboss.as.server.deployment.DeploymentUnit;
import org.jboss.as.server.deployment.DeploymentUnitProcessingException;
import org.jboss.as.server.deployment.DeploymentUnitProcessor;
import org.jboss.as.server.suspend.SuspendController;
import org.jboss.as.txn.service.TxnServices;
import org.jboss.modules.Module;
import org.jboss.msc.service.ServiceBuilder;
import org.jboss.msc.service.ServiceTarget;
import org.jboss.msc.value.ImmediateValue;
import org.wildfly.extension.batch.BatchServiceNames;
import org.wildfly.extension.batch._private.BatchLogger;
import org.wildfly.extension.batch._private.Capabilities;
import org.wildfly.extension.batch.jberet.BatchConfiguration;
import org.wildfly.extension.batch.jberet.deployment.BatchAttachments;
import org.wildfly.extension.batch.jberet.deployment.BatchEnvironmentService;
import org.wildfly.extension.batch.jberet.deployment.JobOperatorService;
import org.wildfly.extension.batch.jberet.deployment.SecurityAwareBatchEnvironment;
import org.wildfly.extension.batch.jberet.deployment.WildFlyJobXmlResolver;
import org.wildfly.extension.batch.job.repository.JobRepositoryFactory;
import org.wildfly.extension.requestcontroller.RequestController;

/**
 * Deployment unit processor for javax.batch integration.
 */
public class BatchEnvironmentProcessor implements DeploymentUnitProcessor {

    private final boolean rcPresent;
    private final ContextClassLoaderJobOperatorContextSelector selector;

    public BatchEnvironmentProcessor(final boolean rcPresent, final ContextClassLoaderJobOperatorContextSelector selector) {
        this.rcPresent = rcPresent;
        this.selector = selector;
    }

    @Override
    public void deploy(final DeploymentPhaseContext phaseContext) throws DeploymentUnitProcessingException {
        final DeploymentUnit deploymentUnit = phaseContext.getDeploymentUnit();
        if (deploymentUnit.hasAttachment(Attachments.MODULE)) {
            BatchLogger.LOGGER.tracef("Processing deployment '%s' for the batch environment.", deploymentUnit.getName());
            // Get the class loader
            final Module module = deploymentUnit.getAttachment(Attachments.MODULE);
            final ClassLoader moduleClassLoader = module.getClassLoader();

            final ServiceTarget serviceTarget = phaseContext.getServiceTarget();

            final EEModuleDescription moduleDescription = deploymentUnit.getAttachment(org.jboss.as.ee.component.Attachments.EE_MODULE_DESCRIPTION);

            final CapabilityServiceSupport support = deploymentUnit.getAttachment(Attachments.CAPABILITY_SERVICE_SUPPORT);

            // Create the batch environment
            final WildFlyJobXmlResolver jobXmlResolver = WildFlyJobXmlResolver.forDeployment(deploymentUnit);
            final BatchEnvironmentService service = new BatchEnvironmentService(moduleClassLoader, jobXmlResolver, deploymentUnit.getName());
            // Set the value for the job-repository, this can't be a capability as the JDBC job repository cannot be constructed
            // until deployment time because the default JNDI data-source name is only known during DUP processing
            service.getJobRepositoryInjector().setValue(new ImmediateValue<>(JobRepositoryFactory.getInstance().getJobRepository(moduleDescription)));

            final ServiceBuilder<SecurityAwareBatchEnvironment> serviceBuilder = serviceTarget.addService(BatchServiceNames.batchEnvironmentServiceName(deploymentUnit), service);
            // Register the required services
            serviceBuilder.addDependency(support.getCapabilityServiceName(Capabilities.BATCH_CONFIGURATION_CAPABILITY.getName()), BatchConfiguration.class, service.getBatchConfigurationInjector());
            serviceBuilder.addDependency(TxnServices.JBOSS_TXN_TRANSACTION_MANAGER, TransactionManager.class, service.getTransactionManagerInjector());

            // Register the bean manager if this is a CDI deployment
            if (WeldDeploymentMarker.isPartOfWeldDeployment(deploymentUnit)) {
                BatchLogger.LOGGER.tracef("Adding BeanManager service dependency for deployment %s", deploymentUnit.getName());
                serviceBuilder.addDependency(BatchServiceNames.beanManagerServiceName(deploymentUnit), BeanManager.class, service.getBeanManagerInjector());
            }

            if (rcPresent) {
                serviceBuilder.addDependency(RequestController.SERVICE_NAME, RequestController.class, service.getRequestControllerInjector());
            }

            // Install the batch environment service
            serviceBuilder.install();
            // Create the job operator service used interact with a deployments batch job
            final JobOperatorService jobOperatorService = new JobOperatorService(Boolean.FALSE, deploymentUnit.getName(), jobXmlResolver);

            // Install the JobOperatorService
            Services.addServerExecutorDependency(serviceTarget.addService(org.wildfly.extension.batch.jberet.BatchServiceNames.jobOperatorServiceName(deploymentUnit), jobOperatorService)
                            .addDependency(support.getCapabilityServiceName(Capabilities.BATCH_CONFIGURATION_CAPABILITY.getName()), BatchConfiguration.class, jobOperatorService.getBatchConfigurationInjector())
                            .addDependency(SuspendController.SERVICE_NAME, SuspendController.class, jobOperatorService.getSuspendControllerInjector())
                            .addDependency(org.wildfly.extension.batch.jberet.BatchServiceNames.batchEnvironmentServiceName(deploymentUnit), SecurityAwareBatchEnvironment.class, jobOperatorService.getBatchEnvironmentInjector()),
                    jobOperatorService.getExecutorServiceInjector())
                    .install();

            // Add the JobOperatorService to the deployment unit
            deploymentUnit.putAttachment(BatchAttachments.JOB_OPERATOR, jobOperatorService);

            // Add the JobOperator to the context selector
            selector.registerContext(moduleClassLoader, JobOperatorContext.create(jobOperatorService));
        }
    }

    @Override
    public void undeploy(DeploymentUnit context) {
        if (context.hasAttachment(Attachments.MODULE)) {
            selector.unregisterContext(context.getAttachment(Attachments.MODULE).getClassLoader());
        }
    }
}