使GAE Shiro和Resteasy一起工作
作者：互联网
我正在努力使GAE-Shiro和Resteasy在一起.所以我尝试做一个快速端口.但是我收到此错误：
[ERROR] java.lang.RuntimeException: java.lang.InstantiationException: com.cilogi.shiro.guice.ServeModule
[ERROR] at org.jboss.resteasy.plugins.guice.GuiceResteasyBootstrapServletContextListener.getModules(GuiceResteasyBootstrapServletContextListener.java:83)
[ERROR] at org.jboss.resteasy.plugins.guice.GuiceResteasyBootstrapServletContextListener.contextInitialized(GuiceResteasyBootstrapServletContextListener.java:27)
[ERROR] at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548)
[ERROR] at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
[ERROR] at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
[ERROR] at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
[ERROR] at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
[ERROR] at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[ERROR] at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
[ERROR] at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[ERROR] at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
[ERROR] at org.mortbay.jetty.Server.doStart(Server.java:224)
[ERROR] at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[ERROR] at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:228)
[ERROR] at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:255)
[ERROR] at com.google.appengine.tools.development.AbstractServer.startup(AbstractServer.java:79)
[ERROR] at com.google.appengine.tools.development.DevAppServerImpl$Servers.startup(DevAppServerImpl.java:451)
[ERROR] at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:198)
[ERROR] at com.google.appengine.tools.development.gwt.AppEngineLauncher.start(AppEngineLauncher.java:97)
[ERROR] at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)
[ERROR] at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068)
[ERROR] at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)
[ERROR] at com.google.gwt.dev.DevMode.main(DevMode.java:311)
[ERROR] Caused by: java.lang.InstantiationException: com.cilogi.shiro.guice.ServeModule
[ERROR] at java.lang.Class.newInstance0(Class.java:359)
[ERROR] at java.lang.Class.newInstance(Class.java:327)
[ERROR] at org.jboss.resteasy.plugins.guice.GuiceResteasyBootstrapServletContextListener.getModules(GuiceResteasyBootstrapServletContextListener.java:70)
[ERROR] ... 22 more
这是我当前的web.xml配置
<context-param>
<param-name>resteasy.guice.modules</param-name>
<!-- <param-value>org.jboss.errai.ui.demo.server.MyServletModule</param-value> -->
<param-value>com.cilogi.shiro.guice.ServeModule</param-value>
</context-param>
<listener>
<listener-class>
org.jboss.resteasy.plugins.guice.GuiceResteasyBootstrapServletContextListener
</listener-class>
</listener>
<context-param>
<param-name>resteasy.servlet.mapping.prefix</param-name>
<param-value>/</param-value>
</context-param>
<servlet>
<servlet-name>Resteasy</servlet-name>
<servlet-class>
org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher
</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Resteasy</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
<context-param>
<param-name>user-base-url</param-name>
<param-value>/user/admin</param-value>
</context-param>
<context-param>
<param-name>static-base-url</param-name>
<param-value></param-value>
</context-param>
<listener>
<listener-class>org.apache.shiro.web.env.EnvironmentLoaderListener</listener-class>
</listener>
<listener>
<listener-class>com.cilogi.shiro.guice.ServeContextListener</listener-class>
</listener>
<mime-mapping>
<extension>manifest</extension>
<mime-type>text/cache-manifest</mime-type>
</mime-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
解决方法:
我意识到这个问题已经存在了将近一年,但最近我与Shiro(注意：不是GAE-Shiro)和RESTEasy遇到了类似的问题,并认为我会发布我在这里使用的解决方案,以便对经历此问题的其他人有所帮助特殊的问题.
问题在于RESTEasy的GuiceResteasyBootstrapServletContextListener试图创建一个模块,该模块需要将参数传递给它(在我的情况下,它是一个ShiroWebModule,需要一个ServletContext参数……在您的情况下,它看起来像com.cilogi.shiro. guice.ServeModule需要传递一个字符串).但是,当RESTEasy尝试创建模块时,它通过调用no-args构造函数来完成,然后由于没有一个而失败.
我决定采用的解决方案是扩展GuiceResteasyBootstrapServletContextListener并重写getModules(ServletContext ctx)方法,以便如果存在采用ServletContext的构造函数,则使用它,否则,使用默认的无参数构造函数.
因此,例如：
public class MyBootstrapServletContextListener extends GuiceResteasyBootstrapServletContextListener {
@Override
protected List getModules(final ServletContext context) {
final List result = new ArrayList();
final String modulesString = context.getInitParameter("resteasy.guice.modules");
if (modulesString != null) {
final String[] moduleStrings = modulesString.trim().split(",");
for (final String moduleString : moduleStrings) {
try {
log.info("Found module: {}", moduleString);
final Class cls = Thread.currentThread().getContextClassLoader().loadClass(moduleString.trim());
final Module module = createModule(cls, context);
result.add(module);
} catch (ClassNotFoundException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
} catch (InstantiationException e) {
throw new RuntimeException(e);
} catch (IllegalArgumentException e) {
throw new RuntimeException(e);
} catch (InvocationTargetException e) {
throw new RuntimeException(e);
}
}
}
return result;
}
private Module createModule(Class cls, ServletContext context) throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
Constructor constructor = null;
try {
constructor = cls.getConstructor(ServletContext.class);
} catch (NoSuchMethodException e) {
log.info("Class {} has no constructor that takes just a ServletContext parameter; defaulting to no-args constructor.", cls);
}
return constructor == null ? (Module) cls.newInstance() : (Module) constructor.newInstance(context);
}
}
完成此操作后,我将web.xml更改为使用MyBootstrapServletContextListener而不是RESTEasy的GuiceResteasyBootstrapServletContextListener,并且RESTEasy不再有问题.您应该能够执行类似的操作,以允许RESTEasy将所需的String传递给com.cilogi.shiro.guice.ServeModule.
再一次,我意识到您可能不再需要解决方案,但是在研究与Shiro的类似问题时碰巧遇到了这个问题,并希望对尝试将RESTEasy和Shiro结合到其Web应用程序中的任何其他人有所帮助.
标签：shiro,google-app-engine,jax-rs,resteasy,java 来源： https://codeday.me/bug/20191031/1972431.html