在drools规则和mule中使用Java方言

我正在尝试使用

mule4.1.1

和

drools7.29.0

开发一个应用程序。问题是，只有当我将方言声明为“

mvel

”时，规则才会编译。如果尝试使用java方言运行规则，则会出现以下错误：

Rule Compilation error : [Rule name='test-rule']
    rules/Rule_test$u45$rule1817291490.java (1:0) : The type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files
    rules/Rule_test$u45$rule1817291490.java (1:0) : The type java.lang.String cannot be resolved. It is indirectly referenced from required .class files
    rules/Rule_test$u45$rule1817291490.java (2:30) : Only a type can be imported. com.mycompany.model.Type resolves to a package
    rules/Rule_test$u45$rule1817291490.java (2:68) : Only a type can be imported. java.time.LocalDateTime resolves to a package
    rules/Rule_test$u45$rule1817291490.java (2:99) : Only a type can be imported. com.mycompany.model.Sequence resolves to a package
    rules/Rule_test$u45$rule1817291490.java (2:164) : Only a type can be imported. java.time.Instant resolves to a package
    rules/Rule_test$u45$rule1817291490.java (2:189) : Only a type can be imported. java.time.ZoneId resolves to a package
    rules/Rule_test$u45$rule1817291490.java (2:213) : Only a type can be imported. org.drools.core.spi.KnowledgeHelper resolves to a package
    rules/Rule_test$u45$rule1817291490.java (3:263) : Implicit super constructor Object() is undefined for default constructor. Must define an explicit constructor
    rules/Rule_test$u45$rule1817291490.java (6:388) : KnowledgeHelper cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (6:413) : com.mycompany.model.Sequence cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (6:457) : org.kie.api.runtime.rule.FactHandle cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (6:513) : com.mycompany.model.Sequence cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (6:558) : org.kie.api.runtime.rule.FactHandle cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (6:624) : java.lang.Exception cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (6:646) : org.kie.api.runtime.rule.RuleContext cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (7:706) : LocalDateTime cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (8:788) : LocalDateTime cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (9:868) : LocalDateTime cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (10:998) : LocalDateTime cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (11:1126) : LocalDateTime cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (12:1211) : System.out cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (13:1274) : System.out cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (14:1336) : System.out cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (15:1396) : System.out cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (18:1545) : System.out cannot be resolved to a type
    rules/Rule_test$u45$rule1817291490.java (20:1634) : System.out cannot be resolved to a type

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有人知道哪一个可能是问题吗？

在问题中添加代码片段添加测试规则代码请说明如何从Mule应用程序调用Drools。它是否使用Java模块？或者使用自定义模块？在问题中添加代码片段添加测试规则代码请显示如何从Mule应用程序调用Drools。它是否使用Java模块？还是使用自定义模块？