JRuby/Nokogiri 在 Mule ESB 3 中找不到 Java XML 库
我在让 JRuby gem Nokogiri 工作时遇到了麻烦。它适用于吉尔布。我在 Mac OS X Lion 上运行 Java 6。 JRuby 是 1.6.3。
你知道如何解决这个问题吗？堆栈跟踪：
INFO 2011-07-22 19:12:53,520 [Mule.app.deployer.monitor.1.thread.1] org.mule.module.launcher.DeploymentService:
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ Started app 'muleesb3-1.0-SNAPSHOT' +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
java.lang.NoSuchMethodError: javax.xml.parsers.DocumentBuilderFactory.newInstance(Ljava/lang/String;Ljava/lang/ClassLoader;)Ljavax/xml/parsers/DocumentBuilderFactory;
at nokogiri.XmlDocument.createNewDocument(XmlDocument.java:220)
at nokogiri.XmlDocument.<init>(XmlDocument.java:96)
at nokogiri.HtmlDocument.<init>(HtmlDocument.java:57)
at nokogiri.NokogiriService$2.allocate(NokogiriService.java:239)
at nokogiri.internals.HtmlDomParserContext.wrapDocument(HtmlDomParserContext.java:121)
at nokogiri.internals.XmlDomParserContext.parse(XmlDomParserContext.java:209)
at nokogiri.HtmlDocument.do_parse(HtmlDocument.java:89)
at nokogiri.HtmlDocument.read_memory(HtmlDocument.java:117)
at nokogiri.HtmlDocument$s$0$0$read_memory.call(HtmlDocument$s$0$0$read_memory.gen:65535)
at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:282)
at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:71)
at org.jruby.ast.FCallManyArgsNode.interpret(FCallManyArgsNode.java:60)
at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104)
at org.jruby.ast.BlockNode.interpret(BlockNode.java:71)
at org.jruby.evaluator.ASTInterpreter.INTERPRET_METHOD(ASTInterpreter.java:75)
at org.jruby.internal.runtime.methods.InterpretedMethod.call(InterpretedMethod.java:120)
at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:272)
at org.jruby.runtime.callsite.CachingCallSite.callBlock(CachingCallSite.java:80)
I've having troubles getting the JRuby gem Nokogiri to work. It works in jirb. I'm running Java 6 on Mac OS X Lion. JRuby is 1.6.3.
Do you know how to solve this? Stacktrace:
INFO 2011-07-22 19:12:53,520 [Mule.app.deployer.monitor.1.thread.1] org.mule.module.launcher.DeploymentService:
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ Started app 'muleesb3-1.0-SNAPSHOT' +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
java.lang.NoSuchMethodError: javax.xml.parsers.DocumentBuilderFactory.newInstance(Ljava/lang/String;Ljava/lang/ClassLoader;)Ljavax/xml/parsers/DocumentBuilderFactory;
at nokogiri.XmlDocument.createNewDocument(XmlDocument.java:220)
at nokogiri.XmlDocument.<init>(XmlDocument.java:96)
at nokogiri.HtmlDocument.<init>(HtmlDocument.java:57)
at nokogiri.NokogiriService$2.allocate(NokogiriService.java:239)
at nokogiri.internals.HtmlDomParserContext.wrapDocument(HtmlDomParserContext.java:121)
at nokogiri.internals.XmlDomParserContext.parse(XmlDomParserContext.java:209)
at nokogiri.HtmlDocument.do_parse(HtmlDocument.java:89)
at nokogiri.HtmlDocument.read_memory(HtmlDocument.java:117)
at nokogiri.HtmlDocument$s$0$0$read_memory.call(HtmlDocument$s$0$0$read_memory.gen:65535)
at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:282)
at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:71)
at org.jruby.ast.FCallManyArgsNode.interpret(FCallManyArgsNode.java:60)
at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104)
at org.jruby.ast.BlockNode.interpret(BlockNode.java:71)
at org.jruby.evaluator.ASTInterpreter.INTERPRET_METHOD(ASTInterpreter.java:75)
at org.jruby.internal.runtime.methods.InterpretedMethod.call(InterpretedMethod.java:120)
at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:272)
at org.jruby.runtime.callsite.CachingCallSite.callBlock(CachingCallSite.java:80)
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DocumentBuilderFactory.newInstance(String, ClassLoader)是 Java 6 中的一个新方法。听起来你还有另一个 jar包含此类的旧版本的类路径。您可以在 jarfinder.com。如果您能够在 Eclipse 中查看项目，则可以使用“打开类型”对话框检查哪些 jar 包含 DocumentBuilderFactory 类。DocumentBuilderFactory.newInstance(String, ClassLoader)is a new method in Java 6. It sounds like you have another jar in your classpath that contains an older version of this class. You can see a potential list of jars that might contain the class at jarfinder.com. If you're able to view your project in Eclipse, you could check what jars contain the DocumentBuilderFactory class by using the 'Open Type' dialog.