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  1. #1
    Member
    Join Date
    Jan 2010
    Location
    Buenos Aires
    Posts
    1

    User specific data example

    Is there any user-specific data example?
    Something like a logging console and one client sees DEBUG messages and another Error messages?

  2. #2
    Administrator
    Join Date
    Jul 2006
    Location
    Milan
    Posts
    1,089
    I'm afraid there is no direct example.
    The instant messenger demo could be suitable for a used-based data filter,
    but we opted for requesting different item names directly from the clients, to keep it simple.

    You could achieve the behavior you describe through small changes on the MonitorDemo Metadata Adapter in
    DOCS-SDKs\sdk_adapter_java\examples\Monitor_MetadataAda pter.
    Suppose that you want that the "msgs" item yields ERROR messages for some users and INFO messages for other users (DEBUG messages are not available in this example), you should extend getItems to become like:
    Code:
    public String[] getItems(String user, String session, String id) throws ItemsException {
        String[] broken = super.getItems(user, session, id);
        for (int i=0; i < broken.length; i++) {
            if (broken[i].equalsIgnoreCase("msgs")) {
                if (myTest(user)) {
                    broken[i] = "monitor_log_error";
                } else {
                    broken[i] = "monitor_log_info";
                }
            }
            broken[i] = convertMonitorName(broken[i],session);
        }
        return broken;
    }
    Then you can change the front-end in pages\demos\MonitorDemo to request the "msgs" item in place, for instance, of "monitor_log_warning".
    The user name has now to be supplied to Lightstreamer by the front-end at Engine creation. Hence, you can add something like:
    Code:
    lsEngine.connection.setUserName("myName");
    lsEngine.connection.setPassword("myPassword");
    in onEngineCreation.
    The default configuration of the demos does not perform credential checks, so all user names can be used. Of course, you should also extend the Metadata Adapter with a suitable implementation of notifyUser.

    Note that the DOCS-SDKs\sdk_adapter_java\examples\Monitor_MetadataAda pter Adapter is not the predeployed one. You can achieve the same by working on the predeployed but more complicated one in
    DOCS-SDKs\sdk_adapter_java\examples\Mixed_MetadataAdapt er.

    Final note: I haven't tested the code.

 

 

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