Client configuration allows an application to provide additional metadata to the cluster which can be useful for troubleshooting and performing diagnostics. In addition to the optional application metadata the cluster will automatically be provided with the driver’s name, driver’s version, and a unique session identifier.
Application name and version metadata can be provided to the cluster during configuration. This information can be used to isolate specific applications on the server-side when troubleshooting or performing diagnostics on clusters that support multiple applications.
CassCluster* cluster = cass_cluster_new();
/* Assign a name for the application connecting to the cluster */
cass_cluster_set_application_name(cluster, "Application Name");
/* Assign a version for the application connecting to the cluster */
cass_cluster_set_application_version(cluster, "1.0.0");
/* ... */
cass_cluster_free(cluster);
Each session is assigned a unique identifier (UUID) which can be used to identify specific client connections server-side. The identifier can also be retrieved client-side using the following function:
CassSession* session = cass_session_new();
/* Retrieve the session's unique identifier */
CassUuid client_id = cass_session_get_client_id(session);
/* ... */
cass_session_free(session);
Note: A session’s unique identifier is constant for its lifetime and does not change when re-establishing connection to a cluster.