[CAMEL-12185] mongodb - Add option outputType=DBCursor for aggregate operation

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.21.0
• Component/s: camel-mongodb, camel-mongodb3
• Estimated Complexity: Unknown
• Assignee: Andrea Cosentino
• Reporter: Farès Hassak
• Created: 23/Jan/18 23:03
• Updated: 26/Jan/18 07:04
• Resolved: 26/Jan/18 07:04

Description

Hello,

The aggregate operation load all results from the driver's cursor into a List which may result in a large number of in-memory objects.

There is no option outputType=DBCursor applies to aggregate, only to findAll.

So, adding this option is necessary to avoid loading all documents in memory.

The following headers will be added CamelMongoDbBatchSize to limits the number of elements returned per batch.

Farès

 

Issue Links

• is related to: CAMEL-7378 camel-mongodb: Investigate returning DBCursor to enable streaming of large result sets
• links to: GitHub Pull Request #2193
• links to: GitHub Pull Request #2193