Tomcat6定制领域

Question

我正在尝试编写我自己的领域来验证我的用户。我编写了一个扩展org.apache.catalina.realm.RealmBase的类，将其编译为.jar文件并将其放入/lib库中。然后我将这个添加到server.xml中：

<Realm className="wstest.tomcat.security.MyRealm"
             resourceName="myrealm"/>

Tomcat似乎没有“看到”我的新罐子。当我启动Tomcat时，我得到：

ERROR main org.apache.commons.digester.Digester - Begin event threw exception
java.lang.ClassNotFoundException: wstest.tomcat.security.MyRealm
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at org.apache.tomcat.util.digester.ObjectCreateRule.begin(ObjectCreateRule.java:205)
    at org.apache.tomcat.util.digester.Rule.begin(Rule.java:153)
    at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1356)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:501)
    at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:179)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1343)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2755)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
    at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1642)
    at org.apache.catalina.startup.Catalina.load(Catalina.java:526)
    at org.apache.catalina.startup.Catalina.load(Catalina.java:560)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:261)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)

Answer 1

您使用过哪个/lib文件夹？你WebProject里的那个还是tomcat里的那个？我自己也是个新手，但据我所知，你应该把你的罐子放在后一个罐子里。

Answer 2

server.xml在the应用程序之前加载。因此，tomcat需要在加载您的应用程序JAR文件之前找到您的领域实现类。将JAR放在tomcat/lib中，这样就可以解决这个问题。

您还需要注意一个问题:不要在Realm构造函数中记录任何内容。containerLog字段没有在这里设置，所以你会得到一个讨厌的NPE。loadInternal()设置containerLog。