Separate Static Instances Used in Web Application

[sjunejo]

Hi,

I have a class in my web applications which is responsible to lookup resources i.e Cx Factories and store objects in MAP for performace. Now if I deploy two instance of this application on jBoss 5+ both end up using the same MAP. How can I make both application to use it own separet heap so both should use their own MAPS generated. If I do not generate MAP, both works fine. Is there anything I can change in jboss-classloading.xml?

You help and comments will be appreciated.

Thanks,

--

SJunejo

[sjunejo]

Some more information regarding the above problem. In my web application, I have class called AgentConnector.java which has following code;

ServiceLocator asl = null;

asl = ServiceLocator.getInstance();

XConnectionFactory cxf = asl.lookupXConnectionFactory();

My ServiceLocator class is responsible for lookups and code is as follows;

     public final static String XCONNECTION_FACTORY_JNDI_NAME = "java:comp/env/jca/xConnectionFactory";

     private static ServiceLocator _instance = null;

     private InitialContext _context = null;

    private Map<String, XConnectionFactory> _cacheXConnectionFactory = null;

    public ServiceLocator() {

        try {

            _context = new InitialContext();

        } catch (NamingException e) {

            throw new RuntimeException("Configuration error - cannot create initial context");

        }

        _cacheXConnectionFactory = Collections.synchronizedMap(new HashMap<String, XConnectionFactory>());

    }

    public static synchronized ServiceLocator getInstance() {

        if (_instance == null) {

            _instance = new ServiceLocator();

        }

        return _instance;

    }

    public XConnectionFactory lookupXConnectionFactory() {

        XConnectionFactory cxFactory = null;

        try {

            if (_cacheXConnectionFactory.containsKey(XCONNECTION_FACTORY_JNDI_NAME)) {

                cxFactory = _cacheXConnectionFactory.get(XCONNECTION_FACTORY_JNDI_NAME);

            } else {

                Object factoryObj = _context.lookup(XCONNECTION_FACTORY_JNDI_NAME);

                cxFactory = (XConnectionFactory) factoryObj;

                _cacheXConnectionFactory.put(XCONNECTION_FACTORY_JNDI_NAME, cxFactory);

            }

        } catch (NamingException e) {

            // LOGGER.fatal("Configuration error " + e.getMessage(), e);

            throw new RuntimeException("Configuration error [" + XCONNECTION_FACTORY_JNDI_NAME + "] " + e.getMessage());

        }

        return cxFactory;

    }

Now, If I deploy two instances of this application in single jboss 5.1+ instance, both will end up using single instnace of 'ServiceLocator' object because it is 'static'. Now is there anyway I can restrict the access of this 'ServiceLocator' i.e. Second instance should create its own ServiceLocator instance and use it rather than the one created by first instance. I want to acheive this without changing my code but with the help of configurations, class-loading etc etc?

Thanks,

--

SJunejo

[sjunejo]

Please refer to the link for the possible solution and information.

http://community.jboss.org/message/617331#617331