6. High Availability Features in the Native Java Client

Executing statements

While the Cluster acts as a central place to manage connection-level configuration options, you will need to establish a Session instance to perform actual work against the cluster. This is done by calling the connect() method on your Cluster instance. Here, we connect to the contacts keyspace:

private Session session; // defined at class level
session = cluster.connect("contacts");

Once you have created the Session, you will be able to execute CQL statements as follows:

String insert = "INSERT INTO contact (id, email) " +
  "VALUES (" +
  "bd297650-2885-11e4-8c21-0800200c9a66," +
  "'[email protected]' " +
");";
session.execute(insert);

You can submit any valid CQL statement to the execute() method, including schema modifications.

Note

Unless you have a large number of keyspaces, you should create one Session instance for each keyspace in your application, because it provides connection pooling and controls the node selection policy (it uses a round-robin approach by default...

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Cassandra High Availability

By : Strickland

Cassandra High Availability

By: Strickland

Overview of this book

Executing statements

Note

Cassandra High Availability

By : Strickland

Cassandra High Availability

By: Strickland

Overview of this book

Executing statements

Note

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