schedulertest.java

drools 一个开放源码的规则引擎

package org.drools.reteoo;

/*
 * $Id$
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import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.drools.DroolsTestCase;
import org.drools.RuleBase;
import org.drools.WorkingMemory;
import org.drools.rule.FixedDuration;
import org.drools.rule.Rule;
import org.drools.spi.Activation;
import org.drools.spi.AsyncExceptionHandler;
import org.drools.spi.ConsequenceException;
import org.drools.spi.Duration;
import org.drools.spi.MockObjectType;
import org.drools.spi.PropagationContext;
import org.drools.spi.Tuple;

/**
 * @author mproctor
 */

public class SchedulerTest extends DroolsTestCase
{
    public void testScheduledActivation() throws Exception
    {
        RuleBase ruleBase = new RuleBaseImpl( new Rete() );

        WorkingMemoryImpl workingMemory = (WorkingMemoryImpl) ruleBase.newWorkingMemory();
        final Scheduler scheduler = Scheduler.getInstance();

        final Rule rule = new Rule( "test-rule" );
        final List data = new ArrayList();

        // add consequence
        rule.setConsequence( new org.drools.spi.Consequence()
        {
            public void invoke(Activation activation)
            {
                data.add( "tested" );
            }
        } );

        /* 1/10th of a second */
        Duration duration = new Duration()
        {
            public long getDuration(Tuple tuple)
            {
                return 100;
            }

        };
        rule.setDuration( duration );

        PropagationContext context = new PropagationContextImpl( PropagationContext.ASSERTION,
                                                                 null,
                                                                 null );

        ReteTuple tuple = new ReteTuple( 0,
                                         new FactHandleImpl( 1 ),
                                         workingMemory );

        assertEquals( 0,
                      data.size() );

        Agenda agenda = workingMemory.getAgenda();
        agenda.addToAgenda( tuple,
                            context,
                            rule );

        // sleep for 2 seconds
        Thread.sleep( 300 );

        // now check for update
        assertEquals( 1,
                      data.size() );
    }

    public void testDoLoopScheduledActivation() throws Exception
    {
        RuleBase ruleBase = new RuleBaseImpl( new Rete() );

        final WorkingMemoryImpl workingMemory = (WorkingMemoryImpl) ruleBase.newWorkingMemory();
        final Agenda agenda = workingMemory.getAgenda();
        final Scheduler scheduler = Scheduler.getInstance();

        final Rule rule = new Rule( "test-rule" );
        final List data = new ArrayList();

        /* 1/10th of a second */
        Duration duration = new Duration()
        {
            public long getDuration(Tuple tuple)
            {
                return 100;
            }

        };

        rule.setDuration( duration );

        // add consequence
        rule.setConsequence( new org.drools.spi.Consequence()
        {
            public void invoke(Activation activation)
            {
                /* on first invoke add another one to the agenda */
                if ( data.size() < 3 )
                {
                    PropagationContext context2 = new PropagationContextImpl( 0,
                                                                              rule,
                                                                              activation );
                    ReteTuple tuple2 = new ReteTuple( 0,
                                                      new FactHandleImpl( 2 ),
                                                      workingMemory );

                    agenda.addToAgenda( tuple2,
                                        context2,
                                        rule );
                }
                data.add( "tested" );
            }
        } );

        PropagationContext context1 = new PropagationContextImpl( PropagationContext.ASSERTION,
                                                                  null,
                                                                  null );

        ReteTuple tuple1 = new ReteTuple( 0,
                                          new FactHandleImpl( 1 ),
                                          workingMemory );

        agenda.addToAgenda( tuple1,
                            context1,
                            rule );
        final AgendaItem item = (AgendaItem) agenda.getScheduledItems().values().toArray()[0];

        assertEquals( 0,
                      data.size() );

        // Schedule is for 1 second
        scheduler.scheduleAgendaItem( item,
                                      workingMemory );

        // sleep for 2 seconds
        Thread.sleep( 500 );

        // now check for update
        assertEquals( 5,
                      data.size() );

    }

    public void testNoLoopScheduledActivation() throws Exception
    {
        RuleBase ruleBase = new RuleBaseImpl( new Rete() );

        final WorkingMemoryImpl workingMemory = (WorkingMemoryImpl) ruleBase.newWorkingMemory();
        final Agenda agenda = workingMemory.getAgenda();
        final Scheduler scheduler = Scheduler.getInstance();

        final Rule rule = new Rule( "test-rule" );
        final List data = new ArrayList();

        /* 1/10th of a second */
        Duration duration = new Duration()
        {
            public long getDuration(Tuple tuple)
            {
                return 100;
            }

        };

        rule.setDuration( duration );
        rule.setNoLoop( true );

        // add consequence
        rule.setConsequence( new org.drools.spi.Consequence()
        {
            public void invoke(Activation activation)
            {
                /* on first invoke add another one to the agenda */
                if ( data.size() < 5 )
                {
                    PropagationContext context2 = new PropagationContextImpl( 0,
                                                                              rule,
                                                                              activation );
                    ReteTuple tuple2 = new ReteTuple( 0,
                                                      new FactHandleImpl( 2 ),
                                                      workingMemory );

                    agenda.addToAgenda( tuple2,
                                        context2,
                                        rule );
                }
                data.add( "tested" );
            }
        } );

        PropagationContext context1 = new PropagationContextImpl( PropagationContext.ASSERTION,
                                                                  null,
                                                                  null );

        ReteTuple tuple1 = new ReteTuple( 0,
                                          new FactHandleImpl( 1 ),
                                          workingMemory );

        agenda.addToAgenda( tuple1,
                            context1,
                            rule );
        final AgendaItem item = (AgendaItem) agenda.getScheduledItems().values().toArray()[0];

        assertEquals( 0,
                      data.size() );

        // Schedule is for 1 second
        scheduler.scheduleAgendaItem( item,
                                      workingMemory );

        // sleep for 2 seconds
        Thread.sleep( 500 );

        // now check for update
        assertEquals( 2,
                      data.size() );

    }

    public void testExceptionHandler() throws Exception
    {
        RuleBase ruleBase = new RuleBaseImpl( new Rete() );

        WorkingMemoryImpl workingMemory = (WorkingMemoryImpl) ruleBase.newWorkingMemory();
        Agenda agenda = workingMemory.getAgenda();
        final Scheduler scheduler = Scheduler.getInstance();

        final Rule rule = new Rule( "test-rule" );

        // add consequence
        rule.setConsequence( new org.drools.spi.Consequence()
        {
            public void invoke(Activation activation) throws ConsequenceException
            {
                throw new ConsequenceException( "not enough cheese",
                                                rule );
            }
        } );

        /* 1/10th of a second */
        Duration duration = new Duration()
        {
            public long getDuration(Tuple tuple)
            {
                return 100;
            }

        };
        rule.setDuration( duration );

        final List data = new ArrayList();

        PropagationContext context = new PropagationContextImpl( PropagationContext.ASSERTION,
                                                                 null,
                                                                 null );

        ReteTuple tuple = new ReteTuple( 0,
                                         new FactHandleImpl( 1 ),
                                         workingMemory );

        assertEquals( 0,
                      data.size() );

        AsyncExceptionHandler handler = new AsyncExceptionHandler()
        {
            public void handleException(WorkingMemory workingMemory,
                                        ConsequenceException exception)
            {
                data.add( "tested" );
            }
        };
        workingMemory.setAsyncExceptionHandler( handler );

        assertLength( 0,
                      data );

        agenda.addToAgenda( tuple,
                            context,
                            rule );

        // sleep for 2 seconds
        Thread.sleep( 300 );

        // now check for update
        assertLength( 1,
                      data );
    }
}