package org.drools.adventures;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.log4j.lf5.util.StreamUtils;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseConfiguration;
import org.drools.KnowledgeBaseFactory;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.common.InternalRuleBase;
import org.drools.conf.AssertBehaviorOption;
import org.drools.impl.KnowledgeBaseImpl;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
import org.drools.runtime.rule.FactHandle;
import org.mvel2.MVEL;
import org.mvel2.integration.impl.MapVariableResolverFactory;
public class GameEngine {
StatefulKnowledgeSession ksession;
ClassLoader classLoader;
public void createGame() {
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newClassPathResource( "Model.drl",
getClass() ),
ResourceType.DRL );
if ( kbuilder.hasErrors() ) {
System.out.println( kbuilder.getErrors().toString() );
System.exit( 1 );
}
kbuilder.add( ResourceFactory.newClassPathResource( "Queries.drl",
getClass() ),
ResourceType.DRL );
if ( kbuilder.hasErrors() ) {
System.out.println( kbuilder.getErrors().toString() );
System.exit( 1 );
}
kbuilder.add( ResourceFactory.newClassPathResource( "General.drl",
getClass() ),
ResourceType.DRL );
if ( kbuilder.hasErrors() ) {
System.out.println( kbuilder.getErrors().toString() );
System.exit( 1 );
}
kbuilder.add( ResourceFactory.newClassPathResource( "Response.drl",
getClass() ),
ResourceType.DRL );
if ( kbuilder.hasErrors() ) {
System.out.println( kbuilder.getErrors().toString() );
System.exit( 1 );
}
kbuilder.add( ResourceFactory.newClassPathResource( "Events.drl",
getClass() ),
ResourceType.DRL );
if ( kbuilder.hasErrors() ) {
System.out.println( kbuilder.getErrors().toString() );
System.exit( 1 );
}
kbuilder.add( ResourceFactory.newClassPathResource( "UiView.drl",
getClass() ),
ResourceType.DRL );
if ( kbuilder.hasErrors() ) {
System.out.println( kbuilder.getErrors().toString() );
System.exit( 1 );
}
kbuilder.add( ResourceFactory.newClassPathResource( "Commands.drl",
getClass() ),
ResourceType.DRL );
if ( kbuilder.hasErrors() ) {
System.out.println( kbuilder.getErrors().toString() );
System.exit( 1 );
}
KnowledgeBaseConfiguration kbaseConf = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
kbaseConf.setOption( AssertBehaviorOption.EQUALITY );
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase( kbaseConf );
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
Counter c = new Counter();
ksession = kbase.newStatefulKnowledgeSession();
// final WorkingMemoryFileLogger logger = new WorkingMemoryFileLogger( ksession );
// logger.setFileName( "log/ta.log" );
ksession.setGlobal( "counter",
c );
classLoader = (((InternalRuleBase) ((KnowledgeBaseImpl) kbase).ruleBase).getRootClassLoader());
ClassLoader currentClassLoader = Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader( classLoader );
Map vars = new HashMap();
vars.put( "c",
c );
Map<String, Map> map;
try {
map = (Map<String, Map>) MVEL.executeExpression( MVEL.compileExpression( new String( StreamUtils.getBytes( getClass().getResource( "data.mvel" ).openStream() ) ) ),
vars );
} catch ( IOException e ) {
throw new RuntimeException( e );
}
for ( Object o : map.get( "rooms" ).values() ) {
ksession.insert( o );
}
for ( Object o : map.get( "doors" ).values() ) {
ksession.insert( o );
}
for ( Object o : map.get( "characters" ).values() ) {
ksession.insert( o );
}
for ( Object o : map.get( "items" ).values() ) {
ksession.insert( o );
}
for ( Object o : map.get( "locations" ).values() ) {
ksession.insert( o );
}
MapVariableResolverFactory f = new MapVariableResolverFactory( map );
String baseStr = "import org.drools.adventures.*; import org.drools.adventures.commands.*;\n";
FactHandle fh = ksession.insert( MVEL.eval( baseStr + "new EnterEvent( characters['hero'], rooms['first floor hallway'] )",
f ) );
ksession.fireAllRules();
} finally {
Thread.currentThread().setContextClassLoader( currentClassLoader );
}
}
public void receiveMessage(UserSession session,
List cmd) {
ClassLoader currentClassLoader = Thread.currentThread().getContextClassLoader();
String baseStr = "import org.drools.adventures.*; import org.drools.adventures.commands.*;\n";
try {
Thread.currentThread().setContextClassLoader( classLoader );
Map vars = new HashMap();
vars.put( "args",
cmd );
MapVariableResolverFactory f = new MapVariableResolverFactory( vars );
Action c = (Action) cmd.get( 0 );
switch ( c ) {
case MOVE : {
ksession.insert( new Request( session,
MVEL.eval( baseStr + "new MoveCommand(args[1], args[2])",
f ) ) );
ksession.fireAllRules();
break;
}
case PICKUP : {
ksession.insert( new Request( session,
MVEL.eval( baseStr + "new PickupCommand(args[1], args[2])",
f ) ) );
ksession.fireAllRules();
break;
}
case DROP : {
ksession.insert( new Request( session,
MVEL.eval( baseStr + "new DropCommand(args[1], args[2])",
f ) ) );
ksession.fireAllRules();
break;
}
case GIVE : {
ksession.insert( new Request( session,
MVEL.eval( baseStr + "new GiveCommand(args[1], args[2], args[3])",
f ) ) );
ksession.fireAllRules();
break;
}
case LOOK : {
ksession.insert( new Request( session,
MVEL.eval( baseStr + "new LookCommand(args[1])",
f ) ) );
ksession.fireAllRules();
break;
}
case SELECT_CHARACTER : {
ksession.insert( new Request( session,
MVEL.eval( baseStr + "new SetSessionCharacterCommand(args[1], args[2])",
f ) ) );
ksession.fireAllRules();
break;
}
}
} catch ( Exception e ) {
session.getChannels().get( "output" ).send( "Unable to Execute Command: " + cmd );
} finally {
Thread.currentThread().setContextClassLoader( currentClassLoader );
}
}
}