自定义声纳规则-ClassNotFoundException：com.sonar.sslr.api.AstandTokenVisitor

Question

部署自定义规则（如https://github.com/sonarsource/sonar-java/blob/master/java-checks/src/main/java/org/sonar/java/checks/useLessimportcheck.java）后，启动Sonarqube4.2时，在sonar启动期间引发以下异常：

Caused by: java.lang.ClassNotFoundException: com.sonar.sslr.api.AstAndTokenVisitor
    at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50) ~[plexus-classworlds-2.2.3.jar:na]
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244) ~[plexus-classworlds-2.2.3.jar:na]
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230) ~[plexus-classworlds-2.2.3.jar:na]
    ... 44 common frames omitted

上面提到的类应该在sslr-core-1.19.2.jar中找到，我在sonarqube-4.2/web/deploy/plugins/squidjava/meta-inf/lib/sslr-core-1.19.2.jar中找到

我是不是缺省了一步来启动默认声纳库？当前安装的插件有(Sonarqube-4.2/extensions/plugins):

• sonarqube-4.2/extensions/plugins/sonar-checkstyle-plugin-2.1.jar
• sonarqube4.2/extensions/plugins/sonar-web-plugin-2.1.jar
• Sonarqube-4.2/扩展/插件/Sonar-Jacoco-plugin-2.2.1.jar
• sonarqube-4.2/extensions/plugins/sonar-java-plugin-2.2.1.jar
• Sonarqube-4.2/extensions/plugins/sonar-surefire-plugin-2.2.1.jar
• sonarqube-4.2/扩展/插件/sonar-pmd-plugin-2.2.jar
• sonarqube-4.2/extensions/plugins/sonar-findbugs-plugin-2.2.1.jar
• sonarqube-4.2/extensions/plugins/sonar-squid-java-plugin-2.2.1.jar

我应该怎么做来防止上面提到的异常（除了取消部署提到的自定义插件）？

Answer 1

最后我找到了这个问题的解决方法/解释：

sonarqube-4.2/web/deploy/plugins/directory在sonar启动期间从sonarqube-4.2/extensions/plugins目录动态更新。每个插件都应该在他的META-INF JAR中有一个lib目录，这样的lib目录应该包含所有必需的库。

在我的例子中：

META-INF/lib/asm-5.0.1.jar
META-INF/lib/java-checks-2.2.1.jar
META-INF/lib/java-squid-2.2.1.jar
META-INF/lib/jaxen-1.1.4.jar
META-INF/lib/sslr-core-1.19.2.jar
META-INF/lib/sslr-squid-bridge-2.3.jar
META-INF/lib/sslr-xpath-1.19.2.jar

 Plugin-Dependencies: META-INF/lib/java-checks-2.2.1.jar META-INF/lib/j
 axen-1.1.4.jar META-INF/lib/sslr-squid-bridge-2.3.jar META-INF/lib/ss
 lr-xpath-1.19.2.jar META-INF/lib/asm-5.0.1.jar META-INF/lib/sslr-core
 -1.19.2.jar META-INF/lib/java-squid-2.2.1.jar