Event based behavior(actions) framework

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No description provided.

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Terminology

• Event is a generic data object
• Event source is able to publish event
• Action is a minimal data handler unit
• Behavior is constructed by one or more Actions
• An event can be handled by specified Behavior

Key Points

• Define event source (data source) in the java code
• Define action in the java code
• Define behavior in the script
• Combine event source and behavior in the script
• The event and sub-event should be tracable.

Defintion:

when([EVENT_NAME]).then(function(event) {
      [EXECUTION_BODY]
}

The execution body support below:

• Sequence execution
• Branch statement execution
• loop statement execution

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One .js file define one Responsible, one Responsible can define one or more event based behavior functions.

The .js file structure should be like below:

{
    "name": "xxx",  // The name of Responsible
    "behaviors": [{
        "event": "xxx",  // The event name
        "behavior" = function() {...}  // The behavior codes
    }, {
        ...
    }]
}

The behavior is a javascript function, you can invoke any action and non-event-based behavior:

{
    "event": ${event_name},
    "behavior": function(event) {
        createPipe().then("xxx").then("xxx");
    }
}

The above "xxx" is action name or behavior name, if action name and behavior name is duplicated, you can add prefix: action:xxx or behavior:xxx.

Create behavior with branch:

function(event) {
    var result = createPipe().with(event).then("xxx").execute();
    if (result.t === 'test') {
        createPipe().with(result).then("xxx").execute();
    } else {
        createPipe().with("xxx").then("xxx");
    }
}

We also can using for/while in the function:

function(event) {
    var result = createPipe().with(event).then("xxx").execute();
    for (var i = 0; i < result.count; i++) {
        createPipe().with(i).then("xxx").execute();
    }
}

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There are two phases to deliver the feature:

• Phase 1, implement event framework, implement define simple event based behavior by program way.
• Phase 2, implement define complex event based behavior by javascript or program way.