0
我有一個sbt autoplugin,當用戶運行一個任務時,我想用一個-javaagent分叉一個新的JVM。該任務應使用jamm來測量內存。sbt autoplugin:爲任務添加javaagent
object SbtMemory extends AutoPlugin {
object autoImport {
val agentTest = inputKey[Unit]("Run task with javaagent")
}
def makeAgentOptions(classpath: Classpath) : String = {
val jammJar = classpath.map(_.data).filter(_.toString.contains("jamm")).head
s"-javaagent:$jammJar"
}
override lazy val projectSettings =
Seq(
agentTest := agentTask.value,
fork in agentTest := true,
javaOptions in agentTest += (dependencyClasspath in Test).map(makeAgentOptions).value
)
lazy val agentTask = Def.task {
val o = new Array[Byte](1024*1024)
val mm = new MemoryMeter()
println("Size of new Array[Byte](1024*1024): " + mm.measureDeep(o))
}
}
當我在命令行中運行sbt perf
,我得到以下異常:
java.lang.IllegalStateException: Instrumentation is not set; Jamm must be set as -javaagent
我也嘗試打印javaOptions和-javaagent
選項沒有設置。
如何在插件中添加-javaagent
javaOption以使用jamm運行任務?
謝謝!