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Version: 8.1

Sandbox

Level: intermediate

A module is a code fragment encapsulated in a separate block that is loaded and executed independently. A module has no information about other Creatio modules besides the names of modules on which it depends. Modules can interact with each other via messages. To organize the module interaction, use a sandbox object.

The sandbox object lets you execute the following actions:

  • Organize the message exchange among the modules.
  • Load and unload modules on request.
Important

To enable module interaction with other Creatio modules, specify the sandbox module as a dependency.

Organize the message exchange among the modules​

To exchange messages among the modules, Creatio must execute the following actions:

  • Register a message.
  • Publish a message.
  • Subscribe to a message.

A module that needs to inform other Creatio modules about changes to its status publishes a message. A module that needs to receive messages about changes to statuses of other modules subscribes to these messages.

note

If the module exports a class constructor, you do not have to add ext-base, terrasoft, sandbox base modules as dependencies. The Ext, Terrasoft, and sandbox objects are available as the this.Ext, this.Terrasoft, this.sandbox object properties.

Register a message​

You can register a message in the following ways:

  • using the sandbox.registerMessages(messageConfig) method
  • using a module schema

Register a message using the sandbox.registerMessages(messageConfig) method​

The messageConfig parameter is a configuration object that contains module messages. The configuration object is a key-value collection.

Template of the message configuration object
"MessageName": { 
    mode: [Message mode], 
    direction: [Message direction] 
}

  • MessageName is the key of the collection item that contains the message name.

  • mode is the message operation mode. Contains the value of the Terrasoft.core.enums.MessageMode enumeration. Learn more about the MessageMode enumeration in the JS class reference.

    • Broadcast. The number of subscribers to the message is unknown in advance. Corresponds to the Terrasoft.MessageMode.BROADCAST enumeration value.
    • Address. One subscriber handles a message. Corresponds to the Terrasoft.MessageMode.PTP enumeration value. You can specify multiple subscribers, but only one handles the message, usually the last registered subscriber.

  • direction. Message direction. Contains the value of the Terrasoft.core.enums.MessageDirectionType enumeration. Learn more about the MessageDirectionType enumeration in the JS class reference.

    • Publish. The module publishes the message to sandbox. Corresponds to the Terrasoft.MessageDirectionType.PUBLISH enumeration value.
    • Subscribe. The module subscribes to a message published from another module. Corresponds to the Terrasoft.MessageDirectionType.SUBSCRIBE enumeration value.
    • Bidirectional. The module publishes and subscribes to the same message in different instances of the same class or the same schema inheritance hierarchy. Corresponds to the Terrasoft.MessageDirectionType.BIDIRECTIONAL enumeration value.

To cancel the message registration in the module, use the sandbox.unRegisterMessages(messages) method. The messages parameter is the message name or array of message names.

To register a message in a view model, declare a message configuration object in the messages schema property.

Register a message using the module schema​

  1. Open the Configuration section and open a module schema.

  2. Add a message to the module schema.

    1. Click the button in the context menu of the Messages node.

    2. Fill out the message properties.

      • Enter the message name in the Name property. The name must match the key in the module configuration object.

      • Select the message direction in the Direction property. Available values:

        • Subscribe: subscription to the message
        • Publish: message publication

      • Select the message operation mode in the Mode property. Available values:

        • Broadcast: broadcast message
        • Address: address message

    3. Click Add to add a message.

You do not need to register messages in a view model schema.

Publish a message​

To publish a message, use the sandbox.publish(messageName, messageArgs, tags) method.

If the published message contains a tag array, Creatio calls handlers for which one or more tags match. If the published message does not contain a tag array, Creatio calls untagged handlers.

Subscribe to a message​

To subscribe to a message, use the sandbox.subscribe(messageName, messageHandler, scope, tags) method.

Load and unload modules on request​

Creatio lets you load and unload modules not specified as dependencies when working with UI.

Load a module on request​

To load a module on request, use the sandbox.loadModule(moduleName, config) method. Method parameters:

  • moduleName is a module name.
  • config is a configuration object that contains the module messages. Required for visual modules.

View the examples that call the sandbox.loadModule() method below.

this.sandbox.loadModule("ProcessListenerV2");

Unload a module on request​

To unload a module on request, use the sandbox.unloadModule(id, renderTo, keepAlive) method. Method parameters:

  • id is a module ID.
  • renderTo is the container name from which to remove the visual module view. Required for visual modules.
  • keepAlive indicates whether to save module model. The core can save the model when unloading the module. The saved model lets you use properties, methods, and messages. Not recommended.

View the examples that call the sandbox.unloadModule() method below.

/* Retrieve the ID of the module to unload. */ 
getModuleId: function() { 
    return this.sandbox.id + "_ModuleName"; 
}, 

/* Unload a non-visual module. */ 
this.sandbox.unloadModule(this.getModuleId());

Create a module chain​

If you want to display a model view in place of another model view, use a module chain. For example, you can use a module chain to populate a field using a lookup value. To do this, display the module view of the lookup selection page in place of the module container of the current page.

To create a chain, add the keepAlive property to the configuration object of the module to load.

See also​

Creatio IDE

Client module

Resources​

JS classes reference (Terrasoft.core.enums.MessageMode enumeration)

JS classes reference (Terrasoft.core.enums.MessageDirectionType enumeration)