org.jboss.ejb.client.Affinity 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 2011, 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.ejb.client;

import java.io.Serializable;

/**
 * The affinity specification for an EJB proxy.
 *
 * @author David M. Lloyd
 */
public abstract class Affinity implements Serializable {

    private static final long serialVersionUID = -2985180758368879373L;

    /**
     * The specification for no particular affinity.
     */
    public static final Affinity NONE = new NoAffinity();

    /**
     * Key which will be used in the invocation context data for passing around the weak affinity
     * associated with a EJB
     */
    public static final String WEAK_AFFINITY_CONTEXT_KEY = "jboss.ejb.weak.affinity";

    Affinity() {
    }

    public boolean equals(Object other) {
        return other instanceof Affinity && equals((Affinity) other);
    }

    public abstract boolean equals(Affinity other);

    public abstract int hashCode();

    abstract EJBReceiverContext requireReceiverContext(EJBClientContext clientContext);

    static class NoAffinity extends Affinity {

        private static final long serialVersionUID = -2052559528672779420L;

        EJBReceiverContext requireReceiverContext(final EJBClientContext clientContext) {
            return null;
        }

        public int hashCode() {
            return 17;
        }

        public boolean equals(final Object obj) {
            return obj == this;
        }

        public boolean equals(final Affinity obj) {
            return obj == this;
        }

        protected Object readResolve() {
            return NONE;
        }

        public String toString() {
            return "None";
        }
    }
}