hmmm, if there was no 'temp=""' in the constructor then it makes me think you either stoped Tomcat or did a deploy between tests. I just ran a quick test with one of the service methods I'm working on. I also use scope="Application" and I couldn't get more than one instance of my service implementation created.
>From the Axis users guide, I found ""Application" scope will create a singleton shared object to service all requests". This backs up what I just saw in my test. Do you think you might have performed a deploy between your previous test steps? -james Quoting "J.W.F. Thirion" <[EMAIL PROTECTED]>: > Thanks for your advice. I did try moving the temp="" part to the top (static > initializer) and the same thing happens. > > PS: What do you mean by "following the Singleton pattern". I am more from a > C/C++ background so the terminology is a bit strange to me. > > Thanks for the help! > Derik > > -----Original Message----- > From: James Wilson [mailto:[EMAIL PROTECTED] > Sent: 04 August 2005 15:15 > To: [email protected] > Subject: Re: Application scope objects that retain data > > > This is interesting. I can't speak to the Axis internals. But what this > shows > me is that Axis is creating more than one service implementation class. > Thus > there is more than one instance of your Test class instanciated even though > they will live to service many requests. This is what I would expect for > Axis > to support multiple user-request-threads coming in from the Servlet > container. > > If you move the 'temp=""' line out of the constructor and into a static > initializer (static String temp="";) you will get the effect you are > looking > for. But to scale the example, you might want to implement a class > following > the Singleton pattern to maintain the application state. > > hope it helps, > james > > Quoting "J.W.F. Thirion" <[EMAIL PROTECTED]>: > > > Hi everyone, > > > > I appologise if this has been asked already, but I would like to know the > > following: Is it possible to have a Java class, e.g. Test in my Test.java, > > to keep the value of its static variables between calls to the service. > E.g. > > I have a static variable temp, to which I just add string data and on each > > call to getValue the value returned should be the value I passed to the > > function concatenated to previous String values. So on the first call, if > I > > pass "Hello", I would get back "Initial, Hello" and on the second call, if > I > > pass "there", I would get back "Initial, Hello there", and so on. The > object > > must thus never go out of scope. I assumed that I needed to set the scope > to > > application, but that didn't work (I just got back the string "Initial, > XXX" > > where XXX is what I passed to getValue - thus the constructor was called > on > > each call). Here is my deploy.wsdd file: > > > > <deployment xmlns="http://xml.apache.org/axis/wsdd/"; > > xmlns:java="http://xml.apache.org/axis/wsdd/providers/java";> > > <service name="Test" provider="java:RPC"> > > <parameter name="scope" value="application" /> > > <parameter name="className" value="Test" /> > > <parameter name="allowedMethods" value="*" /> > > </service> > > </deployment> > > > > and here is my class: > > > > public class Test { > > static boolean bInitialised; > > static String temp; > > > > public Test() { > > bInitialised = false; > > temp = ""; > > } > > > > public static synchronized boolean isInitialised() { > > return bInitialised; > > } > > > > public static synchronized void initialise() { > > temp = "Initial, "; > > bInitialised = true; > > } > > > > public String getValue(String input) { > > if (!Test.isInitialised()) { > > Test.initialise(); > > } > > > > temp = temp + input; > > return temp; > > } > > } > > > > and I have deployed the service with the following: > > > > java org.apache.axis.client.AdminClient deploy.wsdd > > > > Any help would be greatly appreciated. > > > > Kind regards, > > J.W.F. Thirion (Dérik) > > E-mail: [EMAIL PROTECTED] > > > > > > > > >
