Examples with AgendaItem org.drools.core.common.AgendaItem used on opensource projects

Example 21 with AgendaItem

use of org.drools.core.common.AgendaItem in project drools by kiegroup.

the class ActivationIteratorTest method testLianPlusEvalnWithSharing.

@Test
public void testLianPlusEvalnWithSharing() {
    // Rule 0 single LiaNode
    // Rule 1 and 2 are shared
    // Rule 3 shares the LIANode with 1 and 2
    // Rule 4 Shares the eval with 3
    String str = "package org.kie.test \n" + "\n" + "rule rule0 @Propagation(EAGER) when\n" + "    $s : String( this != 'xx' )\n" + "then\n" + "end\n" + "rule rule1 @Propagation(EAGER) when\n" + "    $s : String( this != 'xx' )\n" + "    eval( Integer.parseInt( $s ) <= 2 ) \n" + "then\n" + "end\n" + "rule rule2 @Propagation(EAGER) when\n" + "    $s : String( this != 'xx' )\n" + "    eval( Integer.parseInt( $s ) <= 2 ) \n" + "then\n" + "end\n" + "rule rule3 @Propagation(EAGER) when\n" + "    $s : String( this != 'xx' )\n" + "    eval( Integer.parseInt( $s ) > 2 ) \n" + "then\n" + "end\n" + "rule rule4 @Propagation(EAGER) when\n" + "    $s : String( this != 'xx' )\n" + "    eval( Integer.parseInt( $s ) > 2 ) \n" + "    eval( Integer.parseInt( $s ) > 3 ) \n" + "then\n" + "end\n" + "rule rule5 @Propagation(EAGER) when\n" + "    $s : String( this != 'xx' )\n" + "    eval( Integer.parseInt( $s ) > 2 ) \n" + "    eval( Integer.parseInt( $s ) > 3 ) \n" + "then\n" + "end\n" + "rule rule6 @Propagation(EAGER) when\n" + "     java.util.Map()\n" + "then\n" + "end\n" + "\n";
    KieSession ksession = new KieHelper().addContent(str, ResourceType.DRL).build().newKieSession();
    for (int i = 0; i < 5; i++) {
        ksession.insert(new String("" + i));
    }
    evaluateEagerList(ksession);
    Iterator it = ActivationIterator.iterator(ksession);
    List list = new ArrayList();
    for (AgendaItem act = (AgendaItem) it.next(); act != null; act = (AgendaItem) it.next()) {
        list.add(act.getRule().getName() + ":" + act.getDeclarationValue("$s") + ":" + act.isQueued());
    }
    assertContains(new String[] { "rule0:0:true", "rule0:1:true", "rule0:2:true", "rule0:3:true", "rule0:4:true", "rule1:0:true", "rule1:1:true", "rule1:2:true", "rule2:0:true", "rule2:1:true", "rule2:2:true", "rule3:3:true", "rule3:4:true", "rule4:4:true", "rule5:4:true" }, list);
    ksession.fireAllRules();
    it = ActivationIterator.iterator(ksession);
    list = new ArrayList();
    for (AgendaItem act = (AgendaItem) it.next(); act != null; act = (AgendaItem) it.next()) {
        list.add(act.getRule().getName() + ":" + act.getDeclarationValue("$s") + ":" + act.isQueued());
    }
    assertContains(new String[] { "rule0:0:false", "rule0:1:false", "rule0:2:false", "rule0:3:false", "rule0:4:false", "rule1:0:false", "rule1:1:false", "rule1:2:false", "rule2:0:false", "rule2:1:false", "rule2:2:false", "rule3:3:false", "rule3:4:false", "rule4:4:false", "rule5:4:false" }, list);
}

Example 22 with AgendaItem

use of org.drools.core.common.AgendaItem in project drools by kiegroup.

the class MVELConsequence method evaluate.

@Override
public void evaluate(KnowledgeHelper knowledgeHelper, WorkingMemory workingMemory) throws Exception {
    // same as lambda consequence...
    Tuple tuple = knowledgeHelper.getTuple();
    Declaration[] declarations = ((RuleTerminalNode) knowledgeHelper.getMatch().getTuple().getTupleSink()).getRequiredDeclarations();
    Variable[] vars = consequence.getVariables();
    // ...but the facts are association of Variable and its value, preserving order.
    Map<Variable, Object> facts = new LinkedHashMap<>();
    int declrCounter = 0;
    for (Variable var : vars) {
        if (var.isFact()) {
            Declaration declaration = declarations[declrCounter++];
            InternalFactHandle fh = tuple.get(declaration);
            facts.put(var, declaration.getValue((InternalWorkingMemory) workingMemory, fh.getObject()));
        } else {
            facts.put(var, workingMemory.getGlobal(var.getName()));
        }
    }
    ScriptBlock scriptBlock = null;
    try {
        scriptBlock = (ScriptBlock) consequence.getBlock();
    } catch (ClassCastException e) {
        throw new RuntimeException("I tried to access a ScriptBlock but it was not. So something is thinking is a MVEL consequence but did not set the MVEL script textual representation", e);
    }
    String originalRHS = scriptBlock.getScript();
    String name = context.getRule().getPackageName() + "." + context.getRule().getName();
    String expression = MVELConsequenceBuilder.processMacros(originalRHS);
    String[] globalIdentifiers = new String[] {};
    String[] default_inputIdentifiers = new String[] { "this", "drools", "kcontext", "rule" };
    String[] inputIdentifiers = Stream.concat(Arrays.asList(default_inputIdentifiers).stream(), facts.entrySet().stream().map(kv -> kv.getKey().getName())).collect(Collectors.toList()).toArray(new String[] {});
    String[] default_inputTypes = new String[] { "org.drools.core.spi.KnowledgeHelper", "org.drools.core.spi.KnowledgeHelper", "org.drools.core.spi.KnowledgeHelper", "org.kie.api.definition.rule.Rule" };
    String[] inputTypes = Stream.concat(Arrays.asList(default_inputTypes).stream(), facts.entrySet().stream().map(kv -> kv.getKey().getType().getName())).collect(Collectors.toList()).toArray(new String[] {});
    // ^^ please notice about inputTypes, it is to use the Class.getName(), because is later used by the Classloader internally in MVEL to load the class,
    // do NOT replace with getCanonicalName() otherwise inner classes will not be loaded correctly.
    int languageLevel = 4;
    boolean strictMode = true;
    boolean readLocalsFromTuple = false;
    EvaluatorWrapper[] operators = new EvaluatorWrapper[] {};
    Declaration[] previousDeclarations = new Declaration[] {};
    Declaration[] localDeclarations = new Declaration[] {};
    String[] otherIdentifiers = new String[] {};
    MVELCompilationUnit cu = new MVELCompilationUnit(name, expression, globalIdentifiers, operators, previousDeclarations, localDeclarations, otherIdentifiers, inputIdentifiers, inputTypes, languageLevel, strictMode, readLocalsFromTuple);
    // TODO unfortunately the MVELDialectRuntimeData would be the one of compile time
    // the one from runtime is not helpful, in fact the dialect registry for runtime is empty:
    // MVELDialectRuntimeData runtimeData = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData("mvel");
    MVELDialectRuntimeData runtimeData = new MVELDialectRuntimeData();
    // this classloader will be used by the CompilationUnit to load the imports.
    runtimeData.onAdd(null, Thread.currentThread().getContextClassLoader());
    runtimeData.addPackageImport(context.getPkg().getName());
    runtimeData.addPackageImport("java.lang");
    // therefore we assume for the ScriptBlock all available KBPackages are the default available and imported for the scope of the Script itself.
    for (KiePackage kp : context.getKnowledgePackages()) {
        if (!kp.getName().equals(context.getPkg().getName())) {
            runtimeData.addPackageImport(kp.getName());
        }
    }
    // sometimes here it was passed as a 2nd argument a String?? similar to `rule R in file file.drl`
    Serializable cuResult = cu.getCompiledExpression(runtimeData);
    ExecutableStatement compiledExpression = (ExecutableStatement) cuResult;
    // TODO the part above up to the ExecutableStatement compiledExpression should be cached.
    Map<String, Object> mvelContext = new HashMap<>();
    mvelContext.put("this", knowledgeHelper);
    mvelContext.put("drools", knowledgeHelper);
    mvelContext.put("kcontext", knowledgeHelper);
    mvelContext.put("rule", knowledgeHelper.getRule());
    for (Entry<Variable, Object> kv : facts.entrySet()) {
        mvelContext.put(kv.getKey().getName(), kv.getValue());
    }
    CachingMapVariableResolverFactory cachingFactory = new CachingMapVariableResolverFactory(mvelContext);
    VariableResolverFactory factory = cu.getFactory(knowledgeHelper, ((AgendaItem) knowledgeHelper.getMatch()).getTerminalNode().getRequiredDeclarations(), knowledgeHelper.getRule(), knowledgeHelper.getTuple(), null, (InternalWorkingMemory) workingMemory, workingMemory.getGlobalResolver());
    cachingFactory.setNextFactory(factory);
    MVEL.executeExpression(compiledExpression, knowledgeHelper, cachingFactory);
}

Example 23 with AgendaItem

use of org.drools.core.common.AgendaItem in project drools by kiegroup.

the class WorkingMemoryLogger method extractDeclarations.

/**
 * Creates a string representation of the declarations of an activation.
 * This is a list of name-value-pairs for each of the declarations in the
 * tuple of the activation.  The name is the identifier (=name) of the
 * declaration, and the value is a toString of the value of the
 * parameter, followed by the id of the fact between parentheses.
 *
 * @param match The match from which the declarations should be extracted
 * @return A String represetation of the declarations of the activation.
 */
private String extractDeclarations(Match match) {
    final StringBuilder result = new StringBuilder();
    List<String> declarations = match.getDeclarationIds();
    Map<String, Declaration> declsMap = ((AgendaItem) match).getTerminalNode().getSubRule().getOuterDeclarations();
    for (int i = 0; i < declarations.size(); i++) {
        String declaration = declarations.get(i);
        Declaration decl = declsMap.get(declaration);
        InternalFactHandle handle = ((Tuple) match).get(decl);
        if (!handle.isValid()) {
            continue;
        }
        Object value = decl.getValue(null, handle.getObject());
        result.append(declaration);
        result.append("=");
        if (value == null) {
            // this should never occur
            result.append("null");
        } else {
            result.append(value);
        }
        if (i < declarations.size() - 1) {
            result.append("; ");
        }
    }
    return result.toString();
}

Example 24 with AgendaItem

use of org.drools.core.common.AgendaItem in project drools by kiegroup.

the class DefaultKnowledgeHelper method unblockAllMatches.

public void unblockAllMatches(Match act) {
    AgendaItem targetMatch = (AgendaItem) act;
    boolean wasBlocked = (targetMatch.getBlockers() != null && !targetMatch.getBlockers().isEmpty());
    for (LinkedListEntry entry = (LinkedListEntry) targetMatch.getBlockers().getFirst(); entry != null; ) {
        LinkedListEntry tmp = (LinkedListEntry) entry.getNext();
        LogicalDependency dep = (LogicalDependency) entry.getObject();
        ((AgendaItem) dep.getJustifier()).removeBlocked(dep);
        entry = tmp;
    }
    if (wasBlocked) {
        RuleAgendaItem ruleAgendaItem = targetMatch.getRuleAgendaItem();
        InternalAgenda agenda = workingMemory.getAgenda();
        agenda.stageLeftTuple(ruleAgendaItem, targetMatch);
    }
}

Example 25 with AgendaItem

use of org.drools.core.common.AgendaItem in project drools by kiegroup.

the class DefaultKnowledgeHelper method cancelMatch.

public void cancelMatch(Match act) {
    AgendaItem match = (AgendaItem) act;
    ((RuleTerminalNode) match.getTerminalNode()).cancelMatch(match, workingMemory);
}