java - 为什么我在增强 ebean scala 实体时收到 java.lang.VerifyError

Question

我是 ebean 和 scala/akka 的新手，我正在尝试将最小的案例类保留为 ebean 实体。我的依赖关系如下:

scalaVersion := "2.11.5"

libraryDependencies ++= Seq(
  "com.typesafe.akka" %% "akka-actor" % "2.3.9",
  "com.typesafe.akka" %% "akka-remote" % "2.3.9",
  "com.typesafe.akka" %% "akka-cluster" % "2.3.9",
  "com.typesafe.akka" %% "akka-testkit" % "2.3.9" % "test",
  "org.scalatest" %% "scalatest" % "2.2.4" % "test",
  "com.typesafe.slick" %% "slick" % "3.0.0",
  "com.typesafe.slick" %% "slick-codegen" % "3.0.0",
  "org.sorm-framework" % "sorm" % "0.3.18",
  "org.avaje.ebeanorm" % "avaje-ebeanorm" % "4.7.1",
  "org.avaje.ebeanorm" % "avaje-ebeanorm-agent" % "4.5.3",
  "org.avaje" % "avaje-agentloader" % "1.1.3",
  "org.apache.commons" % "commons-pool2" % "2.0")

和我的实体:

package zw.co.esol.eswitch.model

import javax.persistence.Entity
import javax.persistence.Id
import com.avaje.ebean.Model

@Entity
case class Test(@Id id: Long, firstname: String) extends Model

和我的主要:

object ApplicationMain extends App {

  val system = ActorSystem("eswitch", ConfigFactory.load())

  //system.logConfiguration()

    // Load the agent into the running JVM process
    if (!AgentLoader.loadAgentFromClasspath("avaje-ebeanorm-agent","debug=1;packages=zw.co.esol.eswitch.model.*")) {
      println("avaje-ebeanorm-agent not found in classpath - not dynamically loaded");
    }

    EbeanDbServer.init
    //more code follows.......

和我的 ebean 初始化代码:

object EbeanDbServer {

  def init = {

    // programmatically build a EbeanServer instance  
    // specify the configuration...  

    println("@@ Starting EbeanServer...")

    var config = new ServerConfig();  
    config.setName("pgtest");  

    // Define DataSource parameters  
    var postgresDb = new DataSourceConfig();  
    postgresDb.setDriver("com.mysql.jdbc.Driver");  
    postgresDb.setUsername("user");  
    postgresDb.setPassword("password");  
    postgresDb.setUrl("jdbc:mysql://127.0.0.1:3306/eswitch");  
    postgresDb.setHeartbeatSql("select count(*) from message");  

    config.setDataSourceConfig(postgresDb);  

    // specify a JNDI DataSource   
    // config.setDataSourceJndiName("someJndiDataSourceName");  

    // set DDL options...  
    config.setDdlGenerate(false);  
    config.setDdlRun(false);  

    config.setDefaultServer(false);  
    config.setRegister(false);  

    var test = Test(1, "stan")
    // automatically determine the DatabasePlatform  
    // using the jdbc driver   
    // config.setDatabasePlatform(new PostgresPlatform());  

    // specify the entity classes (and listeners etc)  
    // ... if these are not specified Ebean will search  
    // ... the classpath looking for entity classes.  

      config.addClass(classOf[Test]);  

    // specify jars to search for entity beans  
 //   config.addJar("someJarThatContainsEntityBeans.jar");  

    // create the EbeanServer instance  
    val server: EbeanServer = EbeanServerFactory.create(config);

    println("@@ EbeanServer started... : " + server.getName)

  }
}

但是我在运行应用程序时得到输出:

ebean-enhance> cls: zw/co/esol/eswitch/model/Test  msg: ... skipping add equals() ... already has equals() hashcode() methods
ebean-enhance> cls: zw/co/esol/eswitch/model/Test  msg: enhanced 
[error] (run-main-0) java.lang.VerifyError: Bad type on operand stack
[error] Exception Details:
[error]   Location:
[error]     zw/co/esol/eswitch/model/Test.<init>(JLjava/lang/String;)V @2: invokevirtual
[error]   Reason:
[error]     Type uninitializedThis (current frame, stack[0]) is not assignable to 'zw/co/esol/eswitch/model/Test'
[error]   Current Frame:
[error]     bci: @2
[error]     flags: { flagThisUninit }
[error]     locals: { uninitializedThis, long, long_2nd, 'java/lang/String' }
[error]     stack: { uninitializedThis, long, long_2nd }
[error]   Bytecode:
[error]     0000000: 2a1f b600 932a 2db6 0096 2ab7 0099 2abb
[error]     0000010: 009b 592a b700 9eb5 00a0 2ab8 00a6 b1  
java.lang.VerifyError: Bad type on operand stack
Exception Details:
  Location:
    zw/co/esol/eswitch/model/Test.<init>(JLjava/lang/String;)V @2: invokevirtual
  Reason:
    Type uninitializedThis (current frame, stack[0]) is not assignable to 'zw/co/esol/eswitch/model/Test'
  Current Frame:
    bci: @2
    flags: { flagThisUninit }
    locals: { uninitializedThis, long, long_2nd, 'java/lang/String' }
    stack: { uninitializedThis, long, long_2nd }
  Bytecode:
    0000000: 2a1f b600 932a 2db6 0096 2ab7 0099 2abb
    0000010: 009b 592a b700 9eb5 00a0 2ab8 00a6 b1  

        at zw.co.esol.eswitch.database.EbeanDbServer$.init(EbeanDbServer.scala:45)
        at zw.co.esol.eswitch.global.ApplicationMain$.delayedEndpoint$zw$co$esol$eswitch$global$ApplicationMain$1(ApplicationMain.scala:28)
        at zw.co.esol.eswitch.global.ApplicationMain$delayedInit$body.apply(ApplicationMain.scala:17)
        at scala.Function0$class.apply$mcV$sp(Function0.scala:40)
        at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
        at scala.App$$anonfun$main$1.apply(App.scala:76)
        at scala.App$$anonfun$main$1.apply(App.scala:76)
        at scala.collection.immutable.List.foreach(List.scala:381)
        at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:35)
        at scala.App$class.main(App.scala:76)
        at zw.co.esol.eswitch.global.ApplicationMain$.main(ApplicationMain.scala:17)
        at zw.co.esol.eswitch.global.ApplicationMain.main(ApplicationMain.scala)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)

我在 Linux x86_64 上使用 java 版本“1.7.0_55”。

我可能做错了什么？我试图寻找解决方案，但到目前为止我看到的所有线程都没有帮助。

Answer 1

对于一些在没有 playframework 的情况下使用 ebean 可能会遇到此错误的人

在您的模型中，如果您在任何函数中返回 POJO 类，并且在运行单元测试用例或其他场景时发生此错误，则在 POJO 类或任何不相关的模型类中添加 setter 和 getter 方法，并使用这些函数来处理它。不要直接访问成员变量并操作它们。产生此错误。当我生成所有 getter/setter 时，它为我解决了问题