[rules-dev] Ruleflow ActionNodes
Kris,
ActionNodeInstanceImpl is a stateless representation of a node in a
process, and the ActionNode it references is also stateless. So why do
you accesss it indirectly?
protected ActionNode getActionNode() {
return (ActionNode) getNode();
}
protected Node getNode() {
return this.processInstance.getRuleFlowProcess().getNode(
this.nodeId );
}
--------------------
private Map nodes;
final Long idLong = new Long( id );
Look at PrimitiveLongMap and how its used, means no ObjectWrappers and
uses up a lot less memory than HashMap - as well as being marginally
faster. It is meant for situations where you no the keys are issued
incrementally, we use a key recycling class PrimitiveLongStack to ensure
we don't end up with gaps.
--------------------
I have MVELAction working now in the build framework. I don't really
like actionNode.getAction() which returns an Object, the execution
implemtentation is encapsulated so just actoinNode.execute( wm ) should
be fine, which then delegates to the MVELAction.
public void testSimpleAction() throws Exception {
final Package pkg = new Package( "pkg1" );
ActionDescr actionDescr = new ActionDescr();
actionDescr.setText( "list.add( 'hello world' )" );
PackageBuilder pkgBuilder = new PackageBuilder( pkg );
final PackageBuilderConfiguration conf =
pkgBuilder.getPackageBuilderConfiguration();
MVELDialect mvelDialect = ( MVELDialect )
pkgBuilder.getDialectRegistry().getDialect( "mvel" );
PackageBuildContext context = new PackageBuildContext();
context.init( conf, pkg, null, pkgBuilder.getDialectRegistry(), mvelDialect,
null);
pkgBuilder.addPackageFromDrl( new StringReader("package pkg1;\nglobal
java.util.List list;\n") );
ActionNodeImpl actionNode = new ActionNodeImpl();
final MVELActionBuilder builder = new MVELActionBuilder();
builder.build( context,
actionNode,
actionDescr );
final RuleBase ruleBase = RuleBaseFactory.newRuleBase();
ruleBase.addPackage( pkgBuilder.getPackage() );
final WorkingMemory wm = ruleBase.newStatefulSession();
List list = new ArrayList();
wm.setGlobal( "list", list );
((Action)actionNode.getAction()).execute( wm );
assertEquals("hello world", list.get(0) );
}
Mark