Drools FromNodeLeftTuple无法转换为ReactiveFromNodeLeftTuple

Question

我想知道是否有人可以给我建议。 尝试从Java代码修改反应模型对象的属性时，下面出现异常。

java.lang.ClassCastException: org.drools.core.reteoo.FromNodeLeftTuple cannot be cast to org.drools.core.reteoo.ReactiveFromNodeLeftTuple
at org.drools.core.phreak.ReactiveObjectUtil.notifyModification(ReactiveObjectUtil.java:47)
at org.drools.core.phreak.ReactiveObjectUtil.notifyModification(ReactiveObjectUtil.java:42)
at org.drools.core.phreak.AbstractReactiveObject.notifyModification(AbstractReactiveObject.java:41)
at org.drools.compiler.oopath.model.Person.setAge(Person.java:50)
at org.drools.compiler.oopath.OOPathReactiveTests.testSetter2Rules(OOPathReactiveTests.java:127)

我创建了以下测试来重现该问题，可以将代码插入drools-compiler module in 7.1.0-SNAPSHOT org.drools.compiler.oopath.OOPathReactiveTests中。

当只有1条规则时，它不会发生（请参阅testSetter1Rule() ），而在有更多规则时，它将发生（ testSetter2Rules() ）。

public class OOPathReactiveTests {

@Test
public void testSetter1Rule() {
    String header =
        "import org.drools.compiler.oopath.model.*;\n" +
            "global java.util.List list\n\n";

    String drl1 =
        "rule R1 when\n" +
            "  Man( $m: /wife[age == 25] )\n" +
            "then\n" +
            "  list.add($m.getName());\n" +
            "end\n\n";

    final KieSession ksession = new KieHelper()
        .addContent( header + drl1, ResourceType.DRL )
        .build()
        .newKieSession();

    final List<String> list = new ArrayList<>();
    ksession.setGlobal( "list", list );

    final Man bob = new Man("John", 25);
    bob.setWife( new Woman("Jane", 25) );

    ksession.insert( bob );
    ksession.fireAllRules();

    bob.getWife().setAge(26);
    ksession.fireAllRules();

    Assertions.assertThat(list).containsExactlyInAnyOrder("Jane");
}

@Test
public void testSetter2Rules() {
    String header =
        "import org.drools.compiler.oopath.model.*;\n" +
            "global java.util.List list\n\n";

    String drl1 =
        "rule R1 when\n" +
            "  Man( $m: /wife[age == 25] )\n" +
            "then\n" +
            "  list.add($m.getName());\n" +
            "end\n\n";

    String drl2 =
        "rule R2 when\n" +
            "  Man( $m: /wife[age == 26] )\n" +
            "then\n" +
            "  list.add($m.getName());\n" +
            "end\n\n";

    final KieSession ksession = new KieHelper()
        .addContent( header + drl1 + drl2, ResourceType.DRL )
        .build()
        .newKieSession();

    final List<String> list = new ArrayList<>();
    ksession.setGlobal( "list", list );

    final Man bob = new Man("John", 25);
    bob.setWife( new Woman("Jane", 25) );

    ksession.insert( bob );
    ksession.fireAllRules();

    bob.getWife().setAge(26);
    ksession.fireAllRules();

    Assertions.assertThat(list).containsExactlyInAnyOrder("Jane", "Jane");
}

发生异常时，Jane的leftTuples是：

leftTuples = {HashSet@3461}  size = 2
 0 = {FromNodeLeftTuple@3463} "[fact 0:1:1288815068:1288815068:1:DEFAULT:NON_TRAIT:org.drools.compiler.oopath.model.Man:John]"
 1 = {ReactiveFromNodeLeftTuple@3469} "[fact 0:1:1288815068:1288815068:1:DEFAULT:NON_TRAIT:org.drools.compiler.oopath.model.Man:John]"

我想知道这是一个错误还是我使用错误的方式。 非常感谢你。

彼得

Answer 1

将问题发布到https://groups.google.com/forum/?utm_medium=email&utm_source=footer#!forum/drools-usage后

它已由流口水的开发人员在https://issues.jboss.org/browse/DROOLS-1589中快速修复。