org.jboss.as.clustering.context.ContextClassLoaderReference Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of wildfly-clustering-common Show documentation

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.

There is a newer version: 34.0.0.Final

Show newest version

/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2019, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * 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
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.jboss.as.clustering.context;

import java.util.AbstractMap;
import java.util.Map;

import org.wildfly.security.ParametricPrivilegedAction;
import org.wildfly.security.manager.WildFlySecurityManager;

/**
 * Thread-aware reference for a context {@link ClassLoader}.
 * @author Paul Ferraro
 */
public enum ContextClassLoaderReference implements ThreadContextReference {
    INSTANCE;

    private static final ParametricPrivilegedAction GET_CONTEXT_CLASS_LOADER_ACTION = new ParametricPrivilegedAction() {
        @Override
        public ClassLoader run(Thread thread) {
            return thread.getContextClassLoader();
        }
    };

    private static final ParametricPrivilegedAction> SET_CONTEXT_CLASS_LOADER_ACTION = new ParametricPrivilegedAction>() {
        @Override
        public Void run(Map.Entry entry) {
            entry.getKey().setContextClassLoader(entry.getValue());
            return null;
        }
    };

    @Override
    public ClassLoader apply(Thread thread) {
        return WildFlySecurityManager.doUnchecked(thread, GET_CONTEXT_CLASS_LOADER_ACTION);
    }

    @Override
    public void accept(Thread thread, ClassLoader loader) {
        WildFlySecurityManager.doUnchecked(new AbstractMap.SimpleImmutableEntry<>(thread, loader), SET_CONTEXT_CLASS_LOADER_ACTION);
    }
}