当snakeyaml反序列化对象传递给gatling feeder时,小数字会导致java.lang.ClassCastException

我正在运行一个gatling模拟,它使用来自 yml 提供其方案的文件。当我的数字输入足够大,无法将其解析为 java.lang.Integer ,但小数值显然被解析为整数,并导致 ClassCastException 是的。

import java.io.FileInputStream
import io.gatling.core.Predef.{Feeder, Simulation}
import org.yaml.snakeyaml.Yaml
import org.yaml.snakeyaml.constructor.Constructor
import io.gatling.core.Predef.{scenario, _}
import scala.collection.JavaConversions

class TestClass extends Simulation {

    val yaml = new Yaml(new Constructor(classOf[Holder]))
    val holder = yaml.load(new FileInputStream("src/test/resources/data.yml")).asInstanceOf[Holder]
    scenario("sim").feed(getUserEmulationFeeder(holder))

    def getUserEmulationFeeder(holder:Holder) : Feeder[Long] = {
        val iterable = JavaConversions.iterableAsScalaIterable(holder.numbers)
        iterable.map(l => Map("userToEmulate" -> l)).iterator
    }

}

data.yml 有以下数据:

numbers:
  - 30687965369
  - 31415388869
  - 2

正在反序列化为:

import scala.beans.BeanProperty

class Holder {
    @BeanProperty var numbers = new java.util.ArrayList[Long]()
}

移除 2 修复 类别例外 是的。

完整的stacktrace是:

java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at io.gatling.mojo.MainWithArgsInFile.runMain(MainWithArgsInFile.java:50)
    at io.gatling.mojo.MainWithArgsInFile.main(MainWithArgsInFile.java:33)
Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Long
    at scala.runtime.BoxesRunTime.unboxToLong(BoxesRunTime.java:105)
    at com.mercurygate.TestClass$$anonfun$getUserEmulationFeeder$1.apply(TestClass.scala:25)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
    at scala.collection.Iterator$class.foreach(Iterator.scala:893)
    at scala.collection.AbstractIterator.foreach(Iterator.scala:1336)
    at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
    at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
    at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
    at scala.collection.AbstractTraversable.map(Traversable.scala:104)
    at com.mercurygate.TestClass.getUserEmulationFeeder(TestClass.scala:25)
    at com.mercurygate.TestClass.<init>(TestClass.scala:21)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at java.lang.Class.newInstance(Class.java:442)
    at io.gatling.app.Gatling$.io$gatling$app$Gatling$$$anonfun$1(Gatling.scala:41)
    at io.gatling.app.Gatling$lambda$1.apply(Gatling.scala:41)
    at io.gatling.app.Gatling$lambda$1.apply(Gatling.scala:41)
    at io.gatling.app.Gatling.run(Gatling.scala:92)
    at io.gatling.app.Gatling.runIfNecessary(Gatling.scala:75)
    at io.gatling.app.Gatling.start(Gatling.scala:65)
    at io.gatling.app.Gatling$.start(Gatling.scala:57)
    at io.gatling.app.Gatling$.fromArgs(Gatling.scala:49)
    at io.gatling.app.Gatling$.main(Gatling.scala:43)
    at io.gatling.app.Gatling.main(Gatling.scala)
    ... 6 more

对不起,这个例子太复杂了。只有当我将snakeyaml、gatling和小输入结合起来时,我才会得到错误。