我正在尝试将java附录从云端点迁移到云端点框架。IE V1至V2。
迁移良好,新实例都可以访问端点。和发现显示所有方法https://myapp.appspot.com/_ah/api/discovery/v1/apis
但是,当我使用https://apis-explorer.appspot.com/apis-explorer为我的附录域,而我仍然可以看到API方法,当我对它们进行钻探时,我无法再提供参数并执行参数并执行他们。
查看附录日志,我正在看到以下ClassCastException
Uncaught exception from servlet
javax.servlet.UnavailableException: java.lang.ClassCastException: com.google.api.server.spi.config.AnnotationBoolean cannot be cast to com.google.api.server.spi.config.AnnotationBoolean
at org.mortbay.jetty.servlet.ServletHolder.makeUnavailable(ServletHolder.java:415)
at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:458)
at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.googlecode.objectify.cache.AsyncCacheFilter.doFilter(AsyncCacheFilter.java:58)
at com.googlecode.objectify.ObjectifyFilter.doFilter(ObjectifyFilter.java:48)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:125)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:37)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.JdbcMySqlConnectionCleanupFilter.doFilter(JdbcMySqlConnectionCleanupFilter.java:60)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:48)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:257)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:145)
at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.dispatchServletRequest(JavaRuntime.java:559)
at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.dispatchRequest(JavaRuntime.java:519)
at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:489)
at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:453)
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:460)
at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:293)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:319)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:311)
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:457)
at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:238)
at java.lang.Thread.run(Thread.java:745)
似乎与API Explorer中的方法钻探的尝试相匹配。这些错误不会在云端点的V1中发生。
分类广播意味着AnnotationBoolen已将其加载到2个不同的类负载器中。我本人并不是与Classloaders一起玩,所以我认为这是端点V2的新事物。我该更改以避免进行班级?
API Explorer是否不完全支持云端点框架?
我需要采取一些额外的步骤来通过API Explorer启用云端点框架执行方法?
根据云端点框架迁移指南,这些maven目标不再支持。
<goal>endpoints_get_discovery_doc</goal>
<goal>endpoints_get_client_lib</goal>
请参阅https://cloud.google.com/appengine/docs/standard/java/java/endpoints/migrating
it 也看起来您需要
- 将云端点添加到您的应用中。请参阅https://cloud.google.com/endpoints/docs/frameworks/java/adding-api-management
生成API配置文件并在部署应用程序之前部署它。请参阅https://cloud.google.com/endpoints/docs/frameworks/java/test-deploy
使用...
生成客户端lib
请参阅https://cloud.google.com/endpoints/docs/frameworks/java/quickstart-frameworks-java
步骤1意味着在Web.xml中添加类似以下内容:
<!--
EndPoints management API. See https://cloud.google.com/endpoints/docs/frameworks/java/adding-api-management
-->
<filter>
<filter-name>endpoints-api-configuration</filter-name>
<filter-class>com.google.api.control.ServiceManagementConfigFilter</filter-class>
</filter>
<!--
EndPoints management API. See https://cloud.google.com/endpoints/docs/frameworks/java/adding-api-management
-->
<filter>
<filter-name>endpoints-api-controller</filter-name>
<filter-class>com.google.api.control.extensions.appengine.GoogleAppEngineControlFilter</filter-class>
<init-param>
<param-name>endpoints.projectId</param-name>
<param-value>your-appengine-projectid</param-value>
</init-param>
<init-param>
<param-name>endpoints.serviceName</param-name>
<param-value>your-appengine-project-url.appspot.com</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>endpoints-api-configuration</filter-name>
<servlet-name>EndpointsServlet</servlet-name>
</filter-mapping>
<filter-mapping>
<filter-name>endpoints-api-controller</filter-name>
<servlet-name>EndpointsServlet</servlet-name>
</filter-mapping>
您所经历的ClassCastException
是由于加载旧的SystemServiceServlet
而不是新的EndpointsServlet
。配置您的web.xml
替换
<servlet>
<servlet-name>SystemServiceServlet</servlet-name>
<servlet-class>com.google.api.server.spi.SystemServiceServlet</servlet-class>
...
</servlet>
<servlet-mapping>
<servlet-name>SystemServiceServlet</servlet-name>
<url-pattern>/_ah/spi/*</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>EndpointsServlet</servlet-name>
<servlet-class>com.google.api.server.spi.EndpointsServlet</servlet-class>
...
</servlet>
<servlet-mapping>
<servlet-name>EndpointsServlet</servlet-name>
<url-pattern>/_ah/api/*</url-pattern>
</servlet-mapping>