fibonaccijndiexample.java

rule engine drools-2.0-beta-18

package org.drools.examples.fibonacci;

/*
 * $Id: FibonacciJNDIExample.java,v 1.3 2004/09/17 00:37:51 mproctor Exp $
 * 
 * Copyright 2001-2003 (C) The Werken Company. All Rights Reserved.
 * 
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided that the
 * following conditions are met:
 * 
 * 1. Redistributions of source code must retain copyright statements and
 * notices. Redistributions must also contain a copy of this document.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
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 * from this Software without prior written permission of The Werken Company.
 * For written permission, please contact [e-mail].
 * 
 * 4. Products derived from this Software may not be called "drools" nor may
 * "drools" appear in their names without prior written permission of The Werken
 * Company. "drools" is a trademark of The Werken Company.
 * 
 * 5. Due credit should be given to The Werken Company. (http://werken.com/)
 * 
 * THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE WERKEN COMPANY OR ITS CONTRIBUTORS BE
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import javax.naming.Context;
import javax.naming.InitialContext;

import org.drools.RuleBase;
import org.drools.WorkingMemory;
import org.drools.io.RuleBaseBuilder;

public class FibonacciJNDIExample
{
    private static void initJNDI(String namingFactory, String drl) throws Exception
    {
        System.setProperty( "java.naming.factory.initial", namingFactory );

        System.setProperty( "org.osjava.jndi.shared", "true" );

        RuleBase ruleBase = RuleBaseBuilder
                                           .buildFromUrl( FibonacciJNDIExample.class
                                                                                    .getResource( drl ) );

        Context context = new InitialContext( );
        context.bind( "fibonacci", ruleBase );
    }

    public static void main(String[] args) throws Exception
    {
        if ( args.length != 2 )
        {
            System.out.println( "Usage: "
                                + FibonacciJNDIExample.class.getName( )
                                + " [jndi initial context] [drl file]" );
            return;
        }
        System.out.println( "Using drl: " + args[1] );

        initJNDI( args[0], args[1] );

        Context context = new InitialContext( );

        RuleBase ruleBase = ( RuleBase ) context.lookup( "fibonacci" );

        WorkingMemory workingMemory = ruleBase.newWorkingMemory( );

        org.drools.examples.fibonacci.Fibonacci fibonacci = new Fibonacci( 50 );

        long start = System.currentTimeMillis( );

        workingMemory.assertObject( fibonacci );

        workingMemory.fireAllRules( );

        long stop = System.currentTimeMillis( );

        System.out.println( "fibanacci(" + fibonacci.getSequence( ) + ") == "
                            + fibonacci.getValue( ) + " took "
                            + ( stop - start ) + "ms" );
    }

}