org.fuzzydb.util.context.SimpleSessionContext Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of org.fuzzydb.util Show documentation

Contains classes not specific to fuzzydb implementation which could be used in any implementation of fuzzy matching, or as general utility classes such as those in the geo package.

The newest version!

/******************************************************************************
 * Copyright (c) 2005-2008 Whirlwind Match Limited. All rights reserved.
 *
 * This is open source software; you can use, redistribute and/or modify
 * it under the terms of the Open Software Licence v 3.0 as published by the 
 * Open Source Initiative.
 *
 * You should have received a copy of the Open Software Licence along with this
 * application. if not, contact the Open Source Initiative (www.opensource.org)
 *****************************************************************************/
package org.fuzzydb.util.context;

import java.util.Map;
import java.util.TreeMap;

/**
 * Bean that contains all session data that we want to be able to share between
 * different requests for a given session.
 * 
 * Interface is designed to be like javax.servlet.Session where possible.
 * 
 * @author Neale Upstone
 */
public class SimpleSessionContext implements SessionContext {

	static private Object lock = new Object();
    static private int idCount = 0;
    private String sessionId;

    /**
     * Map of objects for this context.
     */
    private Map objects;

    /**
     * Construct one
     */
    public SimpleSessionContext() {
        synchronized (lock) {
            idCount++;
            sessionId = String.valueOf(idCount);
        }
        objects = new TreeMap();
    }


    /**
     * Get named object
     * @param name
     * @return object, or null
     */
    public Object get(String name) {
        return objects.get( name );
    }



    /**
     * Set object for a given name
     * @param name
     * @param objInstance
     */
    public void set(String name, Object objInstance) {
        objects.put( name, objInstance );
    }



    public String getSessionId() {
        return sessionId;
    }


    public void setSessionId(String id) {
        sessionId = id;
    }


    public void invalidate() {
        // TODO Think I'm going to need a callback here to be able to go and invalidate
        // a JSP session
        for (Object o: objects.values()) {
            if (o instanceof IShutdown) {
                IShutdown service = (IShutdown) o;
                service.shutdown();
            }
        }

        objects.clear();
    }
}