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    A New Chapter for MagicMirror: The Community Takes the Lead
    Read the statement by Michael Teeuw here.

    Does node_helper know if all module instances are already started?

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    • A Offline
      Adam 2 @sdetweil
      last edited by

      @sdetweil So node_helper would never know if all possible module instances are loaded. If it can be assumed that module instances are started in the order defined in config file I could set some config parameter for the first instance with number of modules that will be setup. This can be send to node_helper and then node_helper can wait until it counts proper number of started modules because each of them will notify. After that it can assume that the display is in “stable” state and it is possible to send some new data to display and know that it will be displayed for sure because proper module is already started. The drawback is that I have to count all module instances and introduce some specific config parameter for first of them.

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      • S Offline
        sdetweil @Adam 2
        last edited by

        @Adam-2 I still think that design is bad.

        I can open another browser to mm tomorrow, and you will have another config.js count of modules firing requests.

        why do you think that you need to know about the state of the viewers?

        Sam

        How to add modules

        learning how to use browser developers window for css changes

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        • M Offline
          MMRIZE
          last edited by MMRIZE

          • node_helper cannot know other module’s status directly. It lies on another layer of the architecture.
          • It sounds somewhat weird node_helper has to interact with other modules. Generally A module has to interact with other modules. node_helper is a helper for a specific module to handle things out of MM/browser front level.
          • Module notification DOM_OBJECTS_CREATED is regarded as a signal of ‘all modules are displayed’. You can deliver socketNotification to your node_helper to start your job when this notification is caught.
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          • A Offline
            Adam 2 @MMRIZE
            last edited by

            @MMRIZE My node_helper does not interact with other modules. It interacts only with many instances of my module, because there is only one node_helper even if module has multiple instances. It looks that DOM_OBJECTS_CREATED notification is a good way to know that each module instance is already started. However, as it is received by the module, in fact each instance will pass that info to node_helper while only one is enough. However, this is not a huge issue. After this is passed to node_helper I can be sure that module instances are ready to display data through API provided by the node_helper. Moreover, I can be sure that all individual configs for each module are already loaded.

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            • M Offline
              MMRIZE @Adam 2
              last edited by MMRIZE

              @Adam-2
              You can assign and deliver some instanceID to distinguish which instance of your module transfers this notification.
              Or you can use Promise.race()(to confirm first socketNotification coming from any instance) or Promise.allSettled()(to confirm entire socketNotifications delivered from all instances even though fail or not) in node_helper to check socketNotifications receiving. (Anyway, you need to check how many instances there exist before promise racing)

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              • S Offline
                sdetweil @MMRIZE
                last edited by

                @MMRIZE and config. is accessible in node_helper, so one could count the module instances

                Sam

                How to add modules

                learning how to use browser developers window for css changes

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                • A Offline
                  Adam 2 @sdetweil
                  last edited by

                  @sdetweil Is config file accessible from the node_helper? I thought that only core module files can access it and have to send it back to node_helper if needed.

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                  • S Offline
                    sdetweil @Adam 2
                    last edited by

                    @Adam-2 see the global config var in the node_helper

                    its EVERYTHING in config.js

                    Sam

                    How to add modules

                    learning how to use browser developers window for css changes

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                    • A Offline
                      Adam 2 @sdetweil
                      last edited by

                      @sdetweil I’m searching the documentation and cannot find this global config var. How exactly can I access it?

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                      • S Offline
                        sdetweil @Adam 2
                        last edited by sdetweil

                        @Adam-2 config.

                        it’s not in the doc

                        config.modules is the array of module entries

                        Sam

                        How to add modules

                        learning how to use browser developers window for css changes

                        A 1 Reply Last reply Reply Quote 0
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