org.jboss.remoting3.ModuleLoader Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2017 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jboss.remoting3;

import java.io.IOException;

import org.jboss.modules.Module;
import org.jboss.modules.ModuleLoadException;

/**
 * Utility class to load a class loader from a Module.
 *
 * JBoss Modules is an optional dependency to JBoss Remoting. This class should only be loaded and used
 * when JBoss Modules is actually required.
 *
 * @author Jeff Mesnil (c) 2017 Red Hat inc.
 */
class ModuleLoader {

    /**
     * Return the class loader associated to the JBoss Module identified by the {@code moduleName}
     *
     * @param moduleName the name of the module (can not be {@code null}
     * @return the class loader associated to the JBoss Module
     * @throws IOException if the module can not be loaded or if JBoss Modules is not present
     */
    static ClassLoader getClassLoaderFromModule(String moduleName) throws IOException{
        try {
            return Module.getCallerModuleLoader().loadModule(moduleName).getClassLoader();
        } catch (ModuleLoadException e) {
            throw new IOException("Failed to create endpoint", e);
        } catch (LinkageError e) {
            throw new IOException("Failed to create endpoint: JBoss Modules is not present", e);
        }
    }
}