How to set consistency level for all queries using Cassandra Java Driver?

Question

On an earlier version I would do something like this:

QueryOptions queryOptions = new QueryOptions();
queryOptions.setConsistencyLevel(ConsistencyLevel.LOCAL_ONE)
cluster = Cluster.builder()
        .withQueryOptions(queryOptions)
        ...
        .build();

I can't find a way to do this with DataStax Java Driver 4.2

The closest I could find is

boundStatement.setConsistencyLevel(ConsistencyLevel.LOCAL_ONE);

but I would like to set the level for all queries.

Answer 1

In Java driver 4.x, configuration is done other way - you either specify configuration options in application.conf file (preferred method), or specify it programmatically via DriverConfigLoader.programmaticBuilder (mostly useful for tools builders). See driver documentation for details .

For your case, you need to specify values for following configuration parameters (see configuration reference for details, also in source code ):

• datastax-java-driver.basic.request.consistency for "normal" requests;
• datastax-java-driver.basic.request.serial-consistency for lightweight transactions;

PS It's better to upgrade to latest version - 4.6.0 was released yesterday...