node-red-contrib-batcher

Node-RED node that collects sequences of payloads and send them in a single message.

Collects message payloads by topic and sends them in a batch (array) when:

• The number of messages in the given topic reaches the configured maximal value.
• The number of unique topics in cache crosses the configured limit (flushes the topic of the oldest message in the cache).
• A message with a non-true payload (false, null, undefined, empty-string...) arrives. If the topic is non-true, all the cache will be flushed, otherwise only the given topic will be flushed.
• The oldest message in cache of a given topic waits for more than the maximal delay time (use a negative value to disable feature).

Supports Node.JS 6.x and above.

New in version 0.1:

• Debouncer Node. Very similar to the batcher node, but saves and sends only the latest message.

New in version 0.2:

• Using Maps instead of objects.
• Rate-Limit Node. Limit the rate of messages per topic.

New in version 0.3:

• Drop Overflow Messages for rate-limit.

New in version 0.4:

• Using consts and lets instead of vars, arrow-functions and template strings. Dropped support for Node.JS before verison 6.x.
• Fixing cpu leak in rate-limit due to typo.