I believe it is because you are sharing the class definition, not instances, even if they are static instances.
So webapp1 will create a static instance of Sharer, so will webapp2 off of the same class definition, but each will have its own instance. -----Original Message----- From: java_is_everything [mailto:[EMAIL PROTECTED] Sent: Thursday, July 17, 2008 6:39 AM To: users@tomcat.apache.org Subject: Re: Doubt on lifecycle of a class in "shared" folder Shared Class : //////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////// package client; import java.util.ArrayList; public class Sharer { public static ArrayList listForOthers = null; static { System.out.println("STATIC ON WORK !!!!"); } public static ArrayList getListForOthers() { if(listForOthers != null) { System.out.println("Returned is NOT NULL."); } else { System.out.println("Returned is NULL"); } return listForOthers; } public static void setListForOthers(ArrayList list) { listForOthers = new ArrayList(); for(int i = 0; i < list.size(); i++) { ClientSideEvent ce = new ClientSideEvent(); ClientSideEvent ce2 = (ClientSideEvent) list.get(i); ce.setTimestamp(ce2.getTimestamp()); ce.setId(ce2.getId()); ce.setType(ce2.getType()); ce.setDescription(ce2.getDescription()); listForOthers.add(ce); } } } //////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////// webapp2 : //////////////////////////////////////////////////////////////////////////// //////////////////////////////////////// package client; import java.util.ArrayList; import com.google.gwt.core.client.EntryPoint; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.RootPanel; /** * Entry point classes define <code>onModuleLoad()</code>. */ public class AnotherWelcomePage implements EntryPoint { /** * This is the entry point method. */ public void onModuleLoad() { final Button button = new Button("Doosra Search"); RootPanel.get("slot2").add(button); ArrayList list = Sharer.getListForOthers(); if(list != null) { button.setText("Returning OK with " + list.size()); } else { button.setText("Problem !!!!!!"); } } } //////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////// webapp1 : //////////////////////////////////////////////////////////////////////////// //////////////////////////////////////// package client; import java.util.ArrayList; import com.google.gwt.core.client.EntryPoint; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.ClickListener; import com.google.gwt.user.client.ui.RootPanel; import com.google.gwt.user.client.ui.Widget; //import com.google.gwt.user.client.ui.; /** * Entry point classes define <code>onModuleLoad()</code>. */ public class EntryPointClass implements EntryPoint { /** * This is the entry point method. */ public void onModuleLoad() { ArrayList list = new ArrayList(); ClientSideEvent event = new ClientSideEvent(); final Button b = new Button("Initial Display"); b.addClickListener(new ClickListener() { public void onClick(Widget sender) { ArrayList nowlist = Sharer.getListForOthers(); if(nowlist == null) { b.setText("Null returned"); } else { b.setText("Size is " + Integer.toString(nowlist.size())); } } }); RootPanel.get("slot1").add(b); event.setTimestamp(" time is money "); // It's ok, needs a string event.setId(222); event.setType("type"); event.setDescription("description"); list.add(event); Sharer.setListForOthers(list); //button.setText(Integer.toString(list.size())); } } //////////////////////////////////////////////////////////////////////////// ///////////////////////////////////// Now, webapp1 sets the list size to 1. Now when Sharer.getListForOthers() from webapp1, "Size is 1", while when Sharer.getListForOthers() from webapp2, it shows "Problem !!!!!!". Any light ?????????????????/ Ajay Garg Mikolaj Rydzewski-2 wrote: > > java_is_everything wrote: >> public int getA() >> { >> return a; >> } >> > [...] >> value 123. But I don't .. :-( Instead I get a null as returned value. >> > It's impossible to return null from such method. > > Show us complete code (both shared class and webapps). > > -- > Mikolaj Rydzewski <[EMAIL PROTECTED]> > > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@tomcat.apache.org > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > -- View this message in context: http://www.nabble.com/Doubt-on-lifecycle-of-a-class-in-%22shared%22-folder-t p18502300p18505777.html Sent from the Tomcat - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
