![]() ![]() ![]() While webapp2 (see docs) still exists and can be used outside of App Engine as a WSGI-compliant web framework, it does not do its own routing of user requests to the appropriate code in the application. Years later it was replaced by successor webapp2 when the 2.7 runtime deprecated 2.5 in 2013. The webapp framework was bundled when App Engine first launched on Python 2.5 in 2008. Survey How will you use this codelab? Only read through it Read it and complete the exercises Basic knowledge of developing and deploying App Engine apps.Working knowledge of basic Linux commands.Migrate a simple app from webapp2 to Flask.Use third-party libraries (built-in or otherwise).NOTE: All backend apps with webapp2 code should perform this migration, including apps that do not have a user-facing web UI. In your app, you can use any web framework that handles routing, but for this tutorial, we use Flask as it's broadly used by the community. This initial tutorial shows the first migration steps for modernizing the web framework in App Engine apps: moving from webapp2 to Flask. Moving to the newer generation runtime enables you to integrate with Google Cloud products more easily, use a wider range of supported services, and support current language releases. The most significant step is to move away from original runtime bundled services because the next generation runtimes are more flexible, giving users a greater variety of service options. BeanDefinitionStoreException: Failed to read candidate component class: file nested exception is Īt .ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:281)Īt .ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:242)Īt .ComponentScanBeanDefinitionParser.parse(ComponentScanBeanDefinitionParser.java:84)Īt .(NamespaceHandlerSupport.java:73)Īt .(BeanDefinitionParserDelegate.java:1435)Īt .(BeanDefinitionParserDelegate.java:1425)Īt .(DefaultBeanDefinitionDocumentReader.java:184)Īt .(DefaultBeanDefinitionDocumentReader.java:140)Īt .(DefaultBeanDefinitionDocumentReader.java:111)Īt .(XmlBeanDefinitionReader.java:493)Īt .(XmlBeanDefinitionReader.java:390)Īt .(XmlBeanDefinitionReader.java:334)Īt .(XmlBeanDefinitionReader.java:302)Īt .(AbstractBeanDefinitionReader.java:174)Īt .(AbstractBeanDefinitionReader.java:209)Īt .(AbstractBeanDefinitionReader.java:180)Īt .(XmlWebApplicationContext.java:125)Īt .(XmlWebApplicationContext.java:94)Īt .AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:131)Īt .AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:537)Īt .AbstractApplicationContext.refresh(AbstractApplicationContext.java:451)Īt .nfigureAndRefreshWebApplicationContext(ContextLoader.java:383)Īt .ContextLoader.initWebApplicationContext(ContextLoader.java:283)Īt .ntextInitialized(ContextLoaderListener.java:112)Īt .ContextHandler.startContext(ContextHandler.java:548)Īt .Context.startContext(Context.java:136)Īt .WebAppContext.startContext(WebAppContext.java:1250)Īt .ContextHandler.doStart(ContextHandler.java:517)Īt .WebAppContext.doStart(WebAppContext.java:467)Īt .start(AbstractLifeCycle.java:50)Īt .(AppVersionHandlerMap.java:199)Īt .(AppVersionHandlerMap.java:174)Īt .(JettyServletEngineAdapter.java:134)Īt .JavaRuntime$n(JavaRuntime.java:484)Īt $nInContext(TraceContext.java:438)Īt $TraceContextRunnable$1.run(TraceContext.java:445)Īt .runInContext(CurrentContext.java:220)Īt $nInInheritedContextNoUnref(TraceContext.java:309)Īt $nInInheritedContext(TraceContext.java:301)Īt $n(TraceContext.java:442)Īt .ThreadGroupPool$n(ThreadGroupPool.java:251)Ĭaused by: Īt .(Unknown Source)Īt .classreading.SimpleMetadataReader.(SimpleMetadataReader.java:52)Īt .(SimpleMetadataReaderFactory.java:80)Īt .(CachingMetadataReaderFactory.java:101)Īt .ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.This series of codelabs (self-paced, hands-on tutorials) aims to help Google App Engine (Standard) developers modernize their apps by guiding them through a series of migrations. ContextLoader initWebApplicationContext: Context initialization failed The server encountered an error and could not complete your request. ![]() ContextLoaderListenerĭid you get any solution for issue? I am getting same. Update web.xml, integrate Spring framework. Public String String name, ModelMap model) Ĭreate a Spring XML bean configuration file, define the beans and view resolver.įile : war/WEB-INF/mvc-dispatcher-servlet.xml In addition, DI a message into the “ message” property.įile : src/com/mkyong/MovieController.java 3.1 Delete auto generated SpringMVCGoogleAppEngineServlet.java, you don’t need this.ģ.2 Create a bean, act as controller in REST structure. ![]()
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