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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
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 */
// Portions Copyright [2019] Payara Foundation and/or affiliates

package com.sun.enterprise.resource;

import com.sun.enterprise.resource.pool.ConnectionPool;
import com.sun.logging.LogDomains;
import java.util.logging.Level;
import java.util.logging.Logger;

public class ResourceState {
    private boolean enlisted;
    private boolean busy;
    private long timestamp;
    private TwiceBusyException busyException;
    
    //This is the same logger as in ConnectionPool, used to check the log level
    private Logger LOGGER = LogDomains.getLogger(ConnectionPool.class,LogDomains.RSR_LOGGER);

    public boolean isEnlisted() {
        return enlisted;
    }

    public boolean isUnenlisted() {
        return !enlisted;
    }

    public boolean isFree() {
        return !busy;
    }

    public void setEnlisted(boolean enlisted) {
        this.enlisted = enlisted;
    }

    public boolean isBusy() {
        return busy;
    }

    public void setBusy(boolean busy) {
        this.busy = busy;
        if (!busy && LOGGER.isLoggable(Level.FINE)) {
            busyException = new TwiceBusyException();
        }
    }
    
    /**
     * Gets an exception with a stack trace of when the resource was previously
     * set to not busy.
     * @return a TwiceBusyException used to create a MultiException when setBusy
     * is set to false twice
     * @see com.sun.enterprise.resource.pool.ConnectionPool#resourceClosed(com.sun.enterprise.resource.ResourceHandle) 
     */
    public TwiceBusyException getBusyStackException(){
        return busyException;
    }

    public long getTimestamp() {
        return timestamp;
    }

    public void touchTimestamp() {
        timestamp = System.currentTimeMillis();
    }

    public ResourceState() {
        touchTimestamp();
    }

    @Override
    public String toString() {
        return "Enlisted :" + enlisted + " Busy :" + busy;
    }
    
    public class TwiceBusyException extends Exception {}
    
}