vaadin7: calling navigator from a view renders a stackoverflow error - vaadin

Question

Given a Main UI which encapsulates a vaadin Navigator, i need to call it from a search view so as to display search results in another view:
1) Main Ui
Navigator nav = new Navigator(this, content)
nav.addView("/search", new SearchView())
...
So everything works fine (with other views), until i implement the search view:
private static final String VIEW_SEARCH= "search"
private static final String VIEW_RESULTS = "searchResults"
in the constructor:
public SearchView() {
UI.getCurrent().getNavigator().addView(VIEW_SEARCH, new SearchView())
UI.getCurrent().getNavigator().addView(VIEW_RESULTS, new SearchResultsView())
which renders a stack overflow error:
*********************************************************
*** java.lang.instrument ASSERTION FAILED ***: "!errorOutstanding" with message transform method call failed at ../../../src/share/instrument/JPLISAgent.c line: 844
*** java.lang.instrument ASSERTION FAILED ***: "!errorOutstanding" with message transform method call failed at ../../../src/share/instrument/JPLISAgent.c line: 844
2013-12-21 19:47:00,772 ERROR [DefaultErrorHandler] -
com.vaadin.server.ServerRpcManager$RpcInvocationException: Unable to invoke method click in com.vaadin.shared.ui.button.ButtonServerRpc
at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:170)
at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:118)
at com.vaadin.server.communication.ServerRpcHandler.handleBurst(ServerRpcHandler.java:207)
at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:111)
at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:91)
at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:37)
at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1382)
at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:238)
at grails.plugin.springsecurity.web.filter.GrailsAnonymousAuthenticationFilter.doFilter(GrailsAnonymousAuthenticationFilter.java:53)
at grails.plugin.springsecurity.web.authentication.RequestHolderAuthenticationFilter.doFilter(RequestHolderAuthenticationFilter.java:49)
at grails.plugin.springsecurity.web.authentication.logout.MutableLogoutFilter.doFilter(MutableLogoutFilter.java:82)
at grails.plugin.springsecurity.web.filter.DebugFilter.invokeWithWrappedRequest(DebugFilter.java:102)
at grails.plugin.springsecurity.web.filter.DebugFilter.doFilter(DebugFilter.java:69)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
Caused by: java.lang.reflect.InvocationTargetException
at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:168)
... 15 more
Caused by: com.vaadin.event.ListenerMethod$MethodException: Invocation of method buttonClick in com.webvibes.conquest.ui.KMUI$2 failed.
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:528)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:198)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:161)
at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:969)
at com.vaadin.ui.Button.fireClick(Button.java:368)
at com.vaadin.ui.Button$1.click(Button.java:57)
... 16 more
Caused by: java.lang.StackOverflowError
at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at com.webvibes.conquest.ui.SearchView.<init>(SearchView.groovy:43)
at com.webvibes.conquest.ui.SearchView.<init>(SearchView.groovy:43)
The goal here is pretty basic, the search view handles a Button which opens up a new view for the results with parameters:
KMUI.getCurrent().getNavigator().navigateTo(VIEW_RESULTS)
Thanks for any help.
* UPDATE:
Well, it seems that putting
UI.getCurrent().getNavigator().addView(VIEW_SEARCH, new SearchView())
UI.getCurrent().getNavigator().addView(VIEW_RESULTS, new SearchResultsView())
directly into the main UI does the job,
but, in that case i miss the results constructor to send the results... what is the best way to send results (HashMap) to the reults view:
No signature of method: com.vaadin.navigator.Navigator.navigateTo() is applicable for argument types: (java.lang.String, java.util.HashMap) values: [/searchResults, [total:0, hits:org.compass.core.impl.DefaultCompassDetachedHits#340f9d23, ...]]
Possible solutions: navigateTo(java.lang.String)
KMUI.getCurrent().getNavigator().navigateTo(VIEW_RESULTS, res)

Answer 1

You can use the session to pass parameter to another view.
Check this link for an example:
Setting and reading session attributes