App Management

Listing Apps

To list all apps available to the current user, use the applications() method:

glue.appManager().applications();

The applications() method returns a Map<String, ApplicationInstance> result containing the available app instances keyed by app name.

Starting Apps

To start an app, use the start() method:

glue.appManager().start("clientlist")
        .whenComplete((instance, error) -> {
            if (error != null) {
                // App failed to start.
            }
        });

You can also pass a context object (an app-specific object that will be available in the new app) or override any of the pre-configured window settings:

glue.appManager().start("clientcontact", Collections.singletonMap("selectedUser", 2));

Listing Running Instances

To list all running instances of an app, use the instances() method:

glue.appManager().instances();

The instances() method returns a Collection<ApplicationInstance> result containing all running app instances.

Stopping Instances

To stop a running instance, use the close() or closeAsync() method:

instance.closeAsync();

Multi Window Apps

Available since Glue42 Enterprise 3.12

Glue42 Java offers support for apps consisting of multiple windows. Each child window of an app can be registered in the context of a child Glue42 app that you can save and restore in a Layout, start directly from the Glue42 Toolbar, etc.

The following example demonstrates how to register an ApplicationInstanceHandler using the registerInstanceHandler() method. It will be invoked when a child window of the specified app is started. The handler in the example registers the child window as a Glue42 Window (for more details, see Window Management) using a WindowRegistration builder. When the child window has been registered, it starts to listen for context updates using its onContextUpdated() method. Finally, when a Layout save is requested, the child window will save its current context using the addSaveListener() method in order to be able to retrieve it later when the Layout is restored:

glue.appManager().registerInstanceHandler("my-child-window", applicationInstance -> {

    glue.windows().register(
            WindowRegistration.builder(glue.windows().getWindowHandle(childFrame))
                    .withInstanceId(applicationInstance.getId())
                    .build()
    ).thenAccept(window ->
            window.onContextUpdated(e ->
                selector.setSelectedIndex(selectedIndex);
            {
                int selectedIndex = (Integer) e.getContext().getOrDefault("SelectedIndex", -1);
            }));
    glue.layouts().addSaveListener(applicationInstance.getId(), request ->
            Collections.singletonMap("SelectedIndex", selector.getSelectedIndex()));
});