org.jboss.as.clustering.controller.AbstractModulesServiceConfigurator Maven / Gradle / Ivy

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The code in this module is not explicitly related to clustering, but rather contains resuable code used by clustering modules and any modules that integrate with clustering.

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/*
 * Copyright The WildFly Authors
 * SPDX-License-Identifier: Apache-2.0
 */

package org.jboss.as.clustering.controller;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Supplier;

import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.server.Services;
import org.jboss.dmr.ModelNode;
import org.jboss.modules.Module;
import org.jboss.modules.ModuleLoadException;
import org.jboss.modules.ModuleLoader;
import org.jboss.msc.Service;
import org.jboss.msc.service.ServiceBuilder;
import org.jboss.msc.service.ServiceName;
import org.jboss.msc.service.ServiceTarget;
import org.wildfly.clustering.service.FunctionalService;
import org.wildfly.clustering.service.ServiceConfigurator;
import org.wildfly.clustering.service.ServiceSupplierDependency;
import org.wildfly.clustering.service.SimpleServiceNameProvider;
import org.wildfly.clustering.service.SupplierDependency;

/**
 * @author Paul Ferraro
 */
public abstract class AbstractModulesServiceConfigurator extends SimpleServiceNameProvider implements ResourceServiceConfigurator, Supplier>, Function, T> {

    private final Attribute attribute;
    private final SupplierDependency loader = new ServiceSupplierDependency<>(Services.JBOSS_SERVICE_MODULE_LOADER);
    private final Function> toList;

    private volatile List identifiers = Collections.emptyList();

    AbstractModulesServiceConfigurator(ServiceName name, Attribute attribute, Function> toList) {
        super(name);
        this.attribute = attribute;
        this.toList = toList;
    }

    @Override
    public ServiceConfigurator configure(OperationContext context, ModelNode model) throws OperationFailedException {
        this.identifiers = this.toList.apply(this.attribute.resolveModelAttribute(context, model));
        return this;
    }

    @Override
    public ServiceBuilder build(ServiceTarget target) {
        ServiceBuilder builder = target.addService(this.getServiceName());
        Consumer modules = this.loader.register(builder).provides(this.getServiceName());
        Service service = new FunctionalService<>(modules, this, this);
        return builder.setInstance(service);
    }

    @Override
    public List get() {
        List identifiers = this.identifiers;
        List modules = !identifiers.isEmpty() ? new ArrayList<>(identifiers.size()) : Collections.emptyList();
        for (ModelNode identifier : identifiers) {
            try {
                modules.add(this.loader.get().loadModule(identifier.asString()));
            } catch (ModuleLoadException e) {
                throw new IllegalArgumentException(e);
            }
        }
        return modules;
    }
}