Issue
I have a Servlet which is handled by Spring and also uses Google App Engine as a cloud platform.
I want to redirect this Servlet to another page:
@Controller
public class CustomerController {
@RequestMapping(value = "/", method = RequestMethod.GET)
public String listAllFeedsOnIndexPage(ModelMap map) throws JSONException {
return "invite";
}
@RequestMapping(method = RequestMethod.GET)
public ModelAndView add(HttpServletRequest request, ModelMap model) {
String firstName = request.getParameter("firstName");
String lastName = request.getParameter("lastName");
String email = request.getParameter("email");
System.out.println(email);
System.out.println(firstName);
System.out.println(lastName);
Customer c = new Customer();
c.setFirstName(firstName);
c.setLastName(lastName);
c.setEmail(email);
c.setDate(new Date());
PersistenceManager pm = PMF.get().getPersistenceManager();
try {
pm.makePersistent(c);
} finally {
pm.close();
}
return new ModelAndView("redirect:thankYou");
}
My App Engine output: Initializing App Engine server Mär 30, 2013
1:28:26 PM com.google.apphosting.utils.config.EarHelper logNotAnEar
INFO: Directory 'C:\Users\user\workspace\LandingPage\war' is not an
EAR directory. File
C:\Users\user\workspace\LandingPage\war\appengine-application.xmlappengine-application.xml
not detected. Mär 30, 2013 1:28:26 PM
com.google.apphosting.utils.config.EarHelper logNotAnEar INFO:
Directory 'C:\Users\user\workspace\LandingPage\war' is not an EAR
directory. File
C:\Users\user\workspace\LandingPage\war\appengine-application.xmlappengine-application.xml
not detected. Mär 30, 2013 1:28:26 PM
com.google.apphosting.utils.config.EarHelper logNotAnEar INFO:
Directory 'C:\Users\user\workspace\LandingPage\war' is not an EAR
directory. File
C:\Users\user\workspace\LandingPage\war\appengine-application.xmlappengine-application.xml
not detected. Mär 30, 2013 1:28:26 PM
com.google.apphosting.utils.config.EarHelper logNotAnEar INFO:
Directory 'C:\Users\user\workspace\LandingPage\war' is not an EAR
directory. File
C:\Users\user\workspace\LandingPage\war\appengine-application.xmlappengine-application.xml
not detected. Mär 30, 2013 1:28:26 PM
com.google.apphosting.utils.config.AppEngineWebXmlReader
readAppEngineWebXml INFO: Successfully processed
C:\Users\user\workspace\LandingPage\war\WEB-INF/appengine-web.xml Mär
30, 2013 1:28:26 PM
com.google.apphosting.utils.config.AbstractConfigXmlReader
readConfigXml INFO: Successfully processed
C:\Users\user\workspace\LandingPage\war\WEB-INF/web.xml Mär 30, 2013
1:28:26 PM
com.google.appengine.tools.development.SystemPropertiesManager
setSystemProperties INFO: Overwriting system property key
'java.util.logging.config.file', value
'C:\Users\user\Desktop\\eclipse-java-juno-SR1-win32-x86_64\eclipse\plugins\com.google.appengine.eclipse.sdkbundle_1.7.5\appengine-java-sdk-1.7.5\config\sdk\logging.properties'
with value 'WEB-INF/logging.properties' from
'C:\Users\user\workspace\LandingPage\war\WEB-INF\appengine-web.xml'
Mär 30, 2013 1:28:26 PM com.google.apphosting.utils.jetty.JettyLogger
info INFO: Logging to JettyLogger(null) via
com.google.apphosting.utils.jetty.JettyLogger Mär 30, 2013 12:28:27 PM
com.google.apphosting.utils.jetty.JettyLogger info INFO: jetty-6.1.x
Mär 30, 2013 12:28:28 PM
com.google.appengine.tools.development.ApiProxyLocalImpl log INFO:
javax.servlet.ServletContext log: Initializing Spring root
WebApplicationContext Mär 30, 2013 12:28:28 PM
org.springframework.web.context.ContextLoader
initWebApplicationContext INFO: Root WebApplicationContext:
initialization started Mär 30, 2013 12:28:29 PM
org.springframework.web.context.support.XmlWebApplicationContext
prepareRefresh INFO: Refreshing Root WebApplicationContext: startup
date [Sat Mar 30 12:28:29 UTC 2013]; root of context hierarchy Mär 30,
2013 12:28:29 PM
org.springframework.beans.factory.xml.XmlBeanDefinitionReader
loadBeanDefinitions INFO: Loading XML bean definitions from
ServletContext resource [/WEB-INF/mvc-dispatcher-servlet.xml] Mär 30,
2013 12:28:29 PM
org.springframework.context.annotation.ClassPathBeanDefinitionScanner
registerDefaultFilters INFO: JSR-330 'javax.inject.Named' annotation
found and supported for component scanning Mär 30, 2013 12:28:30 PM
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor
<init> INFO: JSR-330 'javax.inject.Inject' annotation found and
supported for autowiring Mär 30, 2013 12:28:30 PM
org.springframework.beans.factory.support.DefaultListableBeanFactory
preInstantiateSingletons INFO: Pre-instantiating singletons in
org.springframework.beans.factory.support.DefaultListableBeanFactory@9b4ed7a:
defining beans
[customerController,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,mvcContentNegotiationManager,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0,org.springframework.format.support.FormattingConversionServiceFactoryBean#0,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter#0,org.springframework.web.servlet.handler.MappedInterceptor#0,org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver#0,org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver#0,org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver#0,org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping,org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter,org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter,org.springframework.web.servlet.view.InternalResourceViewResolver#0,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor];
root of factory hierarchy Mär 30, 2013 12:28:31 PM
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping
registerHandlerMethod INFO: Mapped
"{[],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}"
onto public org.springframework.web.servlet.ModelAndView
com.landing.controller.CustomerController.add(javax.servlet.http.HttpServletRequest,org.springframework.ui.ModelMap)
Mär 30, 2013 12:28:31 PM
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping
registerHandlerMethod INFO: Mapped
"{[/],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}"
onto public java.lang.String
com.landing.controller.CustomerController.listAllFeedsOnIndexPage(org.springframework.ui.ModelMap)
throws com.google.appengine.labs.repackaged.org.json.JSONException Mär
30, 2013 12:28:31 PM org.springframework.web.context.ContextLoader
initWebApplicationContext INFO: Root WebApplicationContext:
initialization completed in 3010 ms Mär 30, 2013 12:28:32 PM
com.google.appengine.tools.development.ApiProxyLocalImpl log INFO:
javax.servlet.ServletContext log: Initializing Spring FrameworkServlet
'mvc-dispatcher' Mär 30, 2013 12:28:32 PM
org.springframework.web.servlet.DispatcherServlet initServletBean
INFO: FrameworkServlet 'mvc-dispatcher': initialization started Mär
30, 2013 12:28:32 PM
org.springframework.web.context.support.XmlWebApplicationContext
prepareRefresh INFO: Refreshing WebApplicationContext for namespace
'mvc-dispatcher-servlet': startup date [Sat Mar 30 12:28:32 UTC 2013];
parent: Root WebApplicationContext Mär 30, 2013 12:28:32 PM
org.springframework.beans.factory.xml.XmlBeanDefinitionReader
loadBeanDefinitions INFO: Loading XML bean definitions from
ServletContext resource [/WEB-INF/mvc-dispatcher-servlet.xml] Mär 30,
2013 12:28:32 PM
org.springframework.context.annotation.ClassPathBeanDefinitionScanner
registerDefaultFilters INFO: JSR-330 'javax.inject.Named' annotation
found and supported for component scanning Mär 30, 2013 12:28:32 PM
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor
<init> INFO: JSR-330 'javax.inject.Inject' annotation found and
supported for autowiring Mär 30, 2013 12:28:32 PM
org.springframework.beans.factory.support.DefaultListableBeanFactory
preInstantiateSingletons INFO: Pre-instantiating singletons in
org.springframework.beans.factory.support.DefaultListableBeanFactory@1d3f82cd:
defining beans
[customerController,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,mvcContentNegotiationManager,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0,org.springframework.format.support.FormattingConversionServiceFactoryBean#0,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter#0,org.springframework.web.servlet.handler.MappedInterceptor#0,org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver#0,org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver#0,org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver#0,org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping,org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter,org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter,org.springframework.web.servlet.view.InternalResourceViewResolver#0,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor];
parent:
org.springframework.beans.factory.support.DefaultListableBeanFactory@9b4ed7a
Mär 30, 2013 12:28:32 PM
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping
registerHandlerMethod INFO: Mapped
"{[],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}"
onto public org.springframework.web.servlet.ModelAndView
com.landing.controller.CustomerController.add(javax.servlet.http.HttpServletRequest,org.springframework.ui.ModelMap)
Mär 30, 2013 12:28:32 PM
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping
registerHandlerMethod INFO: Mapped
"{[/],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}"
onto public java.lang.String
com.landing.controller.CustomerController.listAllFeedsOnIndexPage(org.springframework.ui.ModelMap)
throws com.google.appengine.labs.repackaged.org.json.JSONException Mär
30, 2013 12:28:32 PM org.springframework.web.servlet.DispatcherServlet
initServletBean INFO: FrameworkServlet 'mvc-dispatcher':
initialization completed in 520 ms Mär 30, 2013 12:28:32 PM
com.google.apphosting.utils.jetty.JettyLogger info INFO: Started
[email protected]:8888 Mär 30, 2013 12:28:32 PM
com.google.appengine.tools.development.AbstractServer startup INFO:
Server default is running at http://`localhost`:8888/ Mär 30, 2013
12:28:32 PM com.google.appengine.tools.development.AbstractServer
startup INFO: The admin console is running at
http://`localhost`:8888/_ah/admin Mär 30, 2013 1:28:32 PM
com.google.appengine.tools.development.DevAppServerImpl start INFO:
Dev App Server is now running null null null null null null Mär 30,
2013 1:28:39 PM
com.google.appengine.api.datastore.dev.LocalDatastoreService init
INFO: Local Datastore initialized: Type: High Replication Storage:
C:\Users\user\workspace\LandingPage\war\WEB-INF\appengine-generated\local_db.bin
Mär 30, 2013 1:28:39 PM
com.google.appengine.api.datastore.dev.LocalDatastoreService load
INFO: The backing store,
C:\Users\user\workspace\LandingPage\war\WEB-INF\appengine-generated\local_db.bin,
does not exist. It will be created. null null null null null null null
However, when I press enter in my form. I get one entry of the data and A LOT OF null entries. It seems to me that the redirect, does not redirect to the other page, it recursively redirects back.
Any idea how to fix that behaviour?
Solution
You can try something like this. I am returning a success page on successful form post.
@RequestMapping(value="sendData" ,method = RequestMethod.POST)
public String add(HttpServletRequest request, ModelMap model) {
String firstName = request.getParameter("firstName");
String lastName = request.getParameter("lastName");
String email = request.getParameter("email");
System.out.println(email);
System.out.println(firstName);
System.out.println(lastName);
Customer c = new Customer();
c.setFirstName(firstName);
c.setLastName(lastName);
c.setEmail(email);
c.setDate(new Date());
PersistenceManager pm = PMF.get().getPersistenceManager();
try {
pm.makePersistent(c);
} finally {
pm.close();
}
return "successpage";
}
Answered By - Ankur Jain
Answer Checked By - Senaida (JavaFixing Volunteer)
