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Updated Output node feature definitions (markdown)

zobalogh 2014-10-29 10:12:04 -07:00
parent 30696c1b74
commit 57ce749518
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Output-node-feature-definitions.md

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This page defines the features and design conventions that each output node should adhere to. The page is currently under development and changes to its contents are possible. Once the behaviour is agreed upon, these conventions are going to be migrated onto the Node-RED website for easy reference.
### Putput nodes MUST:
### Output nodes MUST:
* Produce a clearly and well defined behaviour that affects some externals outside Node-RED
### Input nodes SHOULD:
### Output nodes SHOULD:
* Report errors using <code>node.warn()</code> or <code>node.error()</code> if the external systems are in an unexpected state/behaviour
### Input nodes COULD:
* Poll at regular intervals to see if msg trigger conditions are met:
<code>
node.interval = setInterval(function() {
node.emit("input", {});
}, REPEAT_IN_MILLIS);
</code>
* Alternatively they could fire by being triggered by callbacks => TODO define behaviour here
* Reserve the right not to send anything at all, ever if conditions are never met
### Output nodes COULD:
* TBC