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https://issues.apache.org/jira/browse/BEAM-6241?focusedWorklogId=184142&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-184142
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ASF GitHub Bot logged work on BEAM-6241:
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Author: ASF GitHub Bot
Created on: 11/Jan/19 09:54
Start Date: 11/Jan/19 09:54
Worklog Time Spent: 10m
Work Description: iemejia commented on issue #7293: [BEAM-6241] Added
limit and aggregates support to MongoDbIO
URL: https://github.com/apache/beam/pull/7293#issuecomment-453458873
Excellent! It is just simple is like a Java Function `OutputT apply(InputT
input);` where we guarantee that it fully serializes. I think you will
understand it immediately and I hope that all the `QueryBuilder` types are
fully serializable so it will be easy :crossed_fingers:.
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Issue Time Tracking
-------------------
Worklog Id: (was: 184142)
Time Spent: 1h 40m (was: 1.5h)
> MongoDbIO - Add Limit and Aggregates Support
> --------------------------------------------
>
> Key: BEAM-6241
> URL: https://issues.apache.org/jira/browse/BEAM-6241
> Project: Beam
> Issue Type: Improvement
> Components: io-java-mongodb
> Affects Versions: 2.9.0
> Reporter: Ahmed El.Hussaini
> Assignee: Ahmed El.Hussaini
> Priority: Major
> Labels: easyfix
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> h2. Adds Support to Limit Results
>
> {code:java}
> MongoDbIO.read()
> .withUri("mongodb://localhost:" + port)
> .withDatabase(DATABASE)
> .withCollection(COLLECTION)
> .withFilter("{\"scientist\":\"Einstein\"}")
> .withLimit(5));{code}
> h2. Adds Support to Use Aggregates
>
> {code:java}
> List<BsonDocument> aggregates = new ArrayList<BsonDocument>();
> aggregates.add(
> new BsonDocument(
> "$match",
> new BsonDocument("country", new BsonDocument("$eq", new
> BsonString("England")))));
> PCollection<Document> output =
> pipeline.apply(
> MongoDbIO.read()
> .withUri("mongodb://localhost:" + port)
> .withDatabase(DATABASE)
> .withCollection(COLLECTION)
> .withAggregate(aggregates));
> {code}
>
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