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POVaadin - Exception in context menu on multiple right clicks
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copied!<p>I'm using Vaadin 7.0.5 and ContextMenu 4.2.1 add-on in my project.</p> <p>I am facing a strange issue. i have attached the addon to a treetable. The add-on throws out exception when I do multiple right clicks over the treetable(even after the menu opens). i'm getting the below exception:</p> <pre><code>com.vaadin.server.ServerRpcManager$RpcInvocationException: Unable to invoke method itemClicked in org.vaadin.peter.contextmenu.client.ContextMenuServerRpc at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:170) at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:118) at com.vaadin.server.AbstractCommunicationManager.handleBurst(AbstractCommunicationManager.java:1680) at com.vaadin.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1566) at com.vaadin.server.AbstractCommunicationManager.handleUidlRequest(AbstractCommunicationManager.java:582) at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:315) at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:201) at org.vaadin.artur.icepush.ICEPushServlet.service(ICEPushServlet.java:72) at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:947) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:200) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.GeneratedMethodAccessor109.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:168) ... 24 more Caused by: java.lang.NullPointerException at org.vaadin.peter.contextmenu.ContextMenu$1.itemClicked(ContextMenu.java:46) ... 28 more </code></pre> <p>Can someone please guide me in this? It is popping out red error screen on the browser and annoying?</p> <p><strong>Code Sample</strong></p> <pre><code>final ContextMenu tableContextMenu = new ContextMenu(); tableContextMenu.setAsTableContextMenu(builtTreeTable); tableContextMenu.addContextMenuTableListener(new TableListener() { @Override public void onContextMenuOpenFromRow(ContextMenuOpenedOnTableRowEvent event) { tableContextMenu.removeAllItems(); tableContextMenu.addItem("Item 1", new ThemeResource("img/Item_1.png")).addItemClickListener(new ContextMenuItemClickListener() { @Override public void contextMenuItemClicked(ContextMenuItemClickEvent event) {} }); tableContextMenu.addItem("Item 2", new ThemeResource("img/Item_2.png")).addItemClickListener(new ContextMenuItemClickListener() { @Override public void contextMenuItemClicked(ContextMenuItemClickEvent event) {} }); tableContextMenu.addItem("Item 3", new ThemeResource("img/Item_3.png")).addItemClickListener(new ContextMenuItemClickListener() { @Override public void contextMenuItemClicked(ContextMenuItemClickEvent event) {} }); ContextMenuItem allocate = tableContextMenu.addItem("Item 4", new ThemeResource("img/Item_4.png")); ContextMenuItem averagePrice = allocate.addItem("Item 4.1", new ThemeResource("img/Item_41.png")); averagePrice.addItemClickListener(new ContextMenuItemClickListener() { @Override public void contextMenuItemClicked(ContextMenuItemClickEvent event) {} }); ContextMenuItem manualAllocation = allocate.addItem("Item 4.2", new ThemeResource("img/Item_42.png")); manualAllocation.addItemClickListener(new ContextMenuItemClickListener() { @Override public void contextMenuItemClicked(ContextMenuItemClickEvent event) {} }); tableContextMenu.addItem("Item 5", new ThemeResource("img/Item_5.png")).addItemClickListener(new ContextMenuItemClickListener() { @Override public void contextMenuItemClicked(ContextMenuItemClickEvent event) {} }); } @Override public void onContextMenuOpenFromHeader(ContextMenuOpenedOnTableHeaderEvent event) { tableContextMenu.removeAllItems(); tableContextMenu.addItem("Header", new ThemeResource("img/Header.png")).addItemClickListener(new ContextMenuItemClickListener() { @Override public void contextMenuItemClicked(ContextMenuItemClickEvent event) {} }); } @Override public void onContextMenuOpenFromFooter(ContextMenuOpenedOnTableFooterEvent event) { tableContextMenu.removeAllItems(); } }); </code></pre>

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