MongoDB connection from Java: how to configure codecs given connection URI

Question

I have Java webapp with connection to MongoDB and utilizing custom codecs to encode/decode domain specific Java POJOs to/from MongoDB documents. Connection URL is provided to application via environment variable. The URL can contain options but per URL format documentation https://docs.mongodb.com/manual/reference/connection-string/ it is not possible to specify codecs in URL. So my natural choice would be to use MongoClientOptions builder to combine options from URI and new CodecRegistry with my codecs:

MongoClientOptions optsWithCodecs = MongoClientOptions.builder(
    mongoURI.getOptions()).codecRegistry(myCodecRegistry).build();

The problem is that MongoClient does not provide constructor that would accept URI and MongoClientOptions, there's constructor that takes just URI:

public MongoClient(final MongoClientURI uri) {
    super(uri);
}

That makes me parse URI manually duplicating some code from MongoClient private methods and then use one of other constructors accepting options. I would like to find a better way to configure MongoClient with custom codecs. I'm using Mongo Java driver version 3.3.0

Mika Lammi · Accepted Answer · 2017-10-09 07:48:31Z

2

Builder optionsBuilder = MongoClientOptions.builder().codecRegistry(myCodecRegistry);
MongoClient mongo = new MongoClient(new MongoClientURI(connectionString, optionsBuilder));

answered Oct 9, 2017 at 7:48

Mika Lammi

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s7vr · Accepted Answer · 2016-12-20 11:58:16Z

1

You can try something like this.

 MongoClientOptions optsWithCodecs = MongoClientOptions.builder(
 mongoURI.getOptions()).codecRegistry(myCodecRegistry).build();
 MongoClientURI mongoClientUri = new MongoClientURI(uri, optsWithCodecs);
 MongoClient mongoClient = new MongoClient(mongoClientUri);

answered Dec 20, 2016 at 11:58

s7vr

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