如何将log4javascript与ScalaJS/PhantomJS结合使用
我试着用ScalaJS和PhantomJS运行log4javascript,结果发现一个错误,使用Rhino就可以了 我以下面的ScalaJS为例: 我从另一个ScalaJS示例中获取的log4javascript: 更具体地说,这3个文件: 我修改了TutorialApp以包含一些日志记录:如何将log4javascript与ScalaJS/PhantomJS结合使用,javascript,scala,logging,phantomjs,scala.js,Javascript,Scala,Logging,Phantomjs,Scala.js,我试着用ScalaJS和PhantomJS运行log4javascript,结果发现一个错误,使用Rhino就可以了 我以下面的ScalaJS为例: 我从另一个ScalaJS示例中获取的log4javascript: 更具体地说,这3个文件: 我修改了TutorialApp以包含一些日志记录: package tutorial.webapp import scala.scalajs.js.JSApp import org.scalajs.jquery.jQuery import tutori
package tutorial.webapp
import scala.scalajs.js.JSApp
import org.scalajs.jquery.jQuery
import tutorial.logger.LoggerFactory
object TutorialApp extends JSApp {
println("Before getLogger...")
val log = LoggerFactory.getLogger(getClass().getName)
log.info("After getLogger...")
def main(): Unit = {
jQuery(setupUI _)
}
def setupUI(): Unit = {
jQuery("""<button type="button">Click me!</button>""")
.click(addClickedMessage _)
.appendTo(jQuery("body"))
jQuery("body").append("<p>Hello World</p>")
}
def addClickedMessage(): Unit = {
jQuery("body").append("<p>You clicked the button!</p>")
log.info("Button clicked...")
}
}
记录器文件位于src/main/scala/tutorial/Logger中,只有更改包名才能编译它们。
修改后的package.scala:
package tutorial
package object logger {
private val defaultLogger = LoggerFactory.getLogger("Log")
def log = defaultLogger
}
修改的LoggerFactory.scala
package tutorial.logger
import scala.annotation.elidable
import scala.annotation.elidable._
trait Logger {
/*
* Use @elidable annotation to completely exclude functions from the compiler generated byte-code based on
* the specified level. In a production build most logging functions will simply disappear with no runtime
* performance penalty.
*
* Specify level as a compiler parameter
* > scalac -Xelide-below INFO
*/
@elidable(FINEST) def trace(msg: String, e: Exception): Unit
@elidable(FINEST) def trace(msg: String): Unit
@elidable(FINE) def debug(msg: String, e: Exception): Unit
@elidable(FINE) def debug(msg: String): Unit
@elidable(INFO) def info(msg: String, e: Exception): Unit
@elidable(INFO) def info(msg: String): Unit
@elidable(WARNING) def warn(msg: String, e: Exception): Unit
@elidable(WARNING) def warn(msg: String): Unit
@elidable(SEVERE) def error(msg: String, e: Exception): Unit
@elidable(SEVERE) def error(msg: String): Unit
@elidable(SEVERE) def fatal(msg: String, e: Exception): Unit
@elidable(SEVERE) def fatal(msg: String): Unit
def enableServerLogging(url: String): Unit
def disableServerLogging(): Unit
}
object LoggerFactory {
private[logger] def createLogger(name: String) = {}
lazy val consoleAppender = new BrowserConsoleAppender
lazy val popupAppender = new PopUpAppender
/**
* Create a logger that outputs to browser console
*/
def getLogger(name: String): Logger = {
val nativeLogger = Log4JavaScript.log4javascript.getLogger(name)
nativeLogger.addAppender(consoleAppender)
new L4JSLogger(nativeLogger)
}
/**
* Create a logger that outputs to a separate popup window
*/
def getPopUpLogger(name: String): Logger = {
val nativeLogger = Log4JavaScript.log4javascript.getLogger(name)
nativeLogger.addAppender(popupAppender)
new L4JSLogger(nativeLogger)
}
}
修改的Log4javascript.scala
package tutorial.logger
import scala.scalajs.js
import scala.scalajs.js.annotation.JSName
/**
* Facade for functions in log4javascript that we need
*/
@js.native
private[logger] trait Log4JavaScript extends js.Object {
def getLogger(name:js.UndefOr[String]):JSLogger = js.native
def setEnabled(enabled:Boolean):Unit = js.native
def isEnabled:Boolean = js.native
}
@js.native
@JSName("log4javascript.Level")
private[logger] trait Level extends js.Object {
val ALL:Level = js.native
val TRACE:Level = js.native
val DEBUG:Level = js.native
val INFO:Level = js.native
val WARN:Level = js.native
val ERROR:Level = js.native
val FATAL:Level = js.native
}
@js.native
@JSName("log4javascript.Logger")
private[logger] trait JSLogger extends js.Object {
def addAppender(appender:Appender):Unit = js.native
def removeAppender(appender:Appender):Unit = js.native
def removeAllAppenders(appender:Appender):Unit = js.native
def setLevel(level:Level):Unit = js.native
def getLevel:Level = js.native
def trace(msg:String, error:js.UndefOr[js.Error]):Unit = js.native
def debug(msg:String, error:js.UndefOr[js.Error]):Unit = js.native
def info(msg:String, error:js.UndefOr[js.Error]):Unit = js.native
def warn(msg:String, error:js.UndefOr[js.Error]):Unit = js.native
def error(msg:String, error:js.UndefOr[js.Error]):Unit = js.native
def fatal(msg:String, error:js.UndefOr[js.Error]):Unit = js.native
def trace(msg:String):Unit = js.native
def debug(msg:String):Unit = js.native
def info(msg:String):Unit = js.native
def warn(msg:String):Unit = js.native
def error(msg:String):Unit = js.native
def fatal(msg:String):Unit = js.native
}
@js.native
@JSName("log4javascript.Layout")
private[logger] trait Layout extends js.Object
@js.native
@JSName("log4javascript.JsonLayout")
private[logger] class JsonLayout extends Layout
@js.native
@JSName("log4javascript.Appender")
private[logger] trait Appender extends js.Object {
def setLayout(layout:Layout):Unit = js.native
def setThreshold(level:Level):Unit = js.native
}
@js.native
@JSName("log4javascript.BrowserConsoleAppender")
private[logger] class BrowserConsoleAppender extends Appender
@js.native
@JSName("log4javascript.PopUpAppender")
private[logger] class PopUpAppender extends Appender
@js.native
@JSName("log4javascript.AjaxAppender")
private[logger] class AjaxAppender(url:String) extends Appender {
def addHeader(header:String, value:String):Unit = js.native
}
@js.native
private[logger] object Log4JavaScript extends js.GlobalScope {
val log4javascript:Log4JavaScript = js.native
}
class L4JSLogger(jsLogger:JSLogger) extends Logger {
private var ajaxAppender:AjaxAppender = null
private def undefOrError(e:Exception):js.UndefOr[js.Error] = {
if(e == null)
js.undefined
else
e.asInstanceOf[js.Error]
}
override def trace(msg: String, e: Exception): Unit = jsLogger.trace(msg, undefOrError(e))
override def trace(msg: String): Unit = jsLogger.trace(msg)
override def debug(msg: String, e: Exception): Unit = jsLogger.debug(msg, undefOrError(e))
override def debug(msg: String): Unit = jsLogger.debug(msg)
override def info(msg: String, e: Exception): Unit = jsLogger.info(msg, undefOrError(e))
override def info(msg: String): Unit = jsLogger.info(msg)
override def warn(msg: String, e: Exception): Unit = jsLogger.warn(msg, undefOrError(e))
override def warn(msg: String): Unit = jsLogger.warn(msg)
override def error(msg: String, e: Exception): Unit = jsLogger.error(msg, undefOrError(e))
override def error(msg: String): Unit = jsLogger.error(msg)
override def fatal(msg: String, e: Exception): Unit = jsLogger.fatal(msg, undefOrError(e))
override def fatal(msg: String): Unit = jsLogger.fatal(msg)
override def enableServerLogging(url: String): Unit = {
if(ajaxAppender == null) {
ajaxAppender = new AjaxAppender(url)
ajaxAppender.addHeader("Content-Type", "application/json")
ajaxAppender.setLayout(new JsonLayout)
jsLogger.addAppender(ajaxAppender)
}
}
override def disableServerLogging():Unit = {
if(ajaxAppender != null) {
jsLogger.removeAppender(ajaxAppender)
ajaxAppender = null
}
}
}
当我尝试运行sbt时,会收到以下错误消息:
> run
[info] Running tutorial.webapp.TutorialApp
Before getLogger...
TypeError: undefined is not an object (evaluating '$g["log4javascript"]["getLogger"]')
/tmp/phantomjs-launcher8416853343047081941.js:9 in onError
/tmp/phantomjs-launcher8416853343047081941.js:11 in onError
file:///home/jk/workspace/scalajs-tutorial-0.6.x/target/scala-2.11/scala-js-tutorial-fastopt.js:1085 (in function "getLogger__T__Ltutorial_logger_Logger")
/tmp/phantomjs-launcher8416853343047081941.js:13
file:///home/jk/workspace/scalajs-tutorial-0.6.x/target/scala-2.11/scala-js-tutorial-fastopt.js:1969 (in function "init___")
/tmp/phantomjs-launcher8416853343047081941.js:13
file:///home/jk/workspace/scalajs-tutorial-0.6.x/target/scala-2.11/scala-js-tutorial-fastopt.js:2005 (in function "$m_Ltutorial_webapp_TutorialApp$")
/tmp/phantomjs-launcher8416853343047081941.js:13
file:///tmp/phantomjs-launcher-webpage6476048362931659173.html:9541
/tmp/phantomjs-launcher8416853343047081941.js:13
org.scalajs.jsenv.ExternalJSEnv$NonZeroExitException: PhantomJS exited with code 2
at org.scalajs.jsenv.ExternalJSEnv$AbstractExtRunner.waitForVM(ExternalJSEnv.scala:96)
at org.scalajs.jsenv.ExternalJSEnv$ExtRunner.run(ExternalJSEnv.scala:143)
at org.scalajs.sbtplugin.ScalaJSPluginInternal$.org$scalajs$sbtplugin$ScalaJSPluginInternal$$jsRun(ScalaJSPluginInternal.scala:479)
at org.scalajs.sbtplugin.ScalaJSPluginInternal$$anonfun$45$$anonfun$apply$27$$anonfun$apply$28.apply(ScalaJSPluginInternal.scala:539)
at org.scalajs.sbtplugin.ScalaJSPluginInternal$$anonfun$45$$anonfun$apply$27$$anonfun$apply$28.apply(ScalaJSPluginInternal.scala:533)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
[trace] Stack trace suppressed: run last compile:run for the full output.
[error] (compile:run) org.scalajs.jsenv.ExternalJSEnv$NonZeroExitException: PhantomJS exited with code 2
[error] Total time: 51 s, completed Jan 13, 2016 9:08:34 PM
此外,sbt测试将失败,并显示相同的错误消息:TypeError:undefined不是对象(评估“$g[“log4javascript”][“getLogger”]”)
如果我在build.sbt中注释掉以下行
enablePlugins(ScalaJSPlugin)
name := "Scala.js Tutorial"
scalaVersion := "2.11.7"
libraryDependencies += "org.scala-js" %%% "scalajs-dom" % "0.8.1"
libraryDependencies += "be.doeraene" %%% "scalajs-jquery" % "0.8.0"
jsDependencies += RuntimeDOM
skip in packageJSDependencies := false
// uTest settings
libraryDependencies += "com.lihaoyi" %%% "utest" % "0.3.0" % "test"
testFrameworks += new TestFramework("utest.runner.Framework")
persistLauncher in Compile := true
persistLauncher in Test := false
// Modifications to original tutorial are here:
scalaJSStage in Global := FastOptStage // If NOT commented out: Uses Phantom, if IS commented out: Uses Rhino
libraryDependencies += "org.webjars" % "log4javascript" % "1.4.13"
jsDependencies += "org.webjars" % "log4javascript" % "1.4.13" / "1.4.13/log4javascript.js"
//scalaJSStage in Global := FastOptStage // If NOT commented out: Uses Phantom, if IS commented out: Uses Rhino
然后我从sbt运行中得到以下结果:
> run
[info] Running tutorial.webapp.TutorialApp
Before getLogger...
After getLogger...
[success] Total time: 4 s, completed Jan 13, 2016 9:16:39 PM
该脚本也可以在浏览器上运行,当文件scalajs-tutorial-fastopt.html加载时,按钮出现,单击时控制台上出现新的“您单击了按钮”文本和“按钮单击…”。sbt测试也成功
幻影版本是2.0.1-development
如何让代码与Phantom.js一起工作
编辑:
我将Phantom降级为2.0.0版,但错误消息保持不变。我也遇到了这个问题,遵循相同的教程。事实证明,问题的根本原因是在log4javascript代码中,有嵌入html的字符串(其中包含更多javascript)。我不知道这背后的原因是什么。。。无论如何,PhantomJS测试运行程序只需将所有js代码和依赖项一起吐出到一个html文件中(在一个脚本标记内);当javascript解释器看到一个未被替换的
标记时,就会出错。(顺便说一句,我是通过在我的临时文件中找到phantomjs launcher-*.html页面并在Chrome中打开它才发现这一点的)
无论如何,在查看了log4javascript的源代码并注意到它托管在sourceforge上,并且已经有9年没有更新了(源代码控制是CVS…),我们决定使用不同的日志框架实现,因为能够在PhantomJS中运行测试对我们来说很重要
非常令人沮丧,因为您有点期望日志框架是“正常工作”的东西之一。我也遇到了这个问题,遵循相同的教程。事实证明,问题的根本原因是在log4javascript代码中,有嵌入html的字符串(其中包含更多javascript)。我不知道这背后的原因是什么。。。无论如何,PhantomJS测试运行程序只需将所有js代码和依赖项一起吐出到一个html文件中(在一个脚本标记内);当javascript解释器看到一个未被替换的
标记时,就会出错。(顺便说一句,我是通过在我的临时文件中找到phantomjs launcher-*.html页面并在Chrome中打开它才发现这一点的)
无论如何,在查看了log4javascript的源代码并注意到它托管在sourceforge上,并且已经有9年没有更新了(源代码控制是CVS…),我们决定使用不同的日志框架实现,因为能够在PhantomJS中运行测试对我们来说很重要
非常令人沮丧,因为您有点希望日志框架是“正常工作”的东西之一。您选择了哪个日志框架,并成功地使其与PhantomJS一起工作了吗?最后我选择了它,因为它似乎与log4javascript的概念非常相似。在将其打包到webjar(您可能不感兴趣)和为其编写ScalaJS facade方面做了一些工作,结果证明这是相对简单的,但我最终还是成功了。对于一个快速修复,如果你现在不太在意日志记录,你可以从你的项目中删除log4javascript。你是怎么包装的?我还简要地查看了stritti的log4js,但注意到网站文档和实际代码不匹配,而且zip中没有“打包”的js文件。我还找到了节点的另一个log4js:。它也是基于斯特里蒂的工作,但现在分开了。这是很高兴听到幻影。您选择了哪个日志框架,并成功地使其与PhantomJS一起工作了吗?最后我选择了它,因为它似乎与log4javascript的概念非常相似。在将其打包到webjar(您可能不感兴趣)和为其编写ScalaJS facade方面做了一些工作,结果证明这是相对简单的,但我最终还是成功了。对于一个快速修复,如果你现在不太在意日志记录,你可以从你的项目中删除log4javascript。你是怎么包装的?我还简要地查看了stritti的log4js,但注意到网站文档和实际代码不匹配,而且zip中没有“打包”的js文件。我还找到了节点的另一个log4js:。它也是基于斯特里蒂的工作,但现在分离。