abstract class Cassandra::Listener
Cassandra state listener.
- Abstract
- Actual state listener implementations don’t need to inherit from this class as long as they conform to its interface. This class exists solely for documentation purposes
Inherits
ObjectMethods
host_up
(host)This method is called whenever a host is considered to be up, whether by Cassandra’s gossip exchange or when the driver has successfully established a connection to it.
- Void
- Return value of this method is ignored.
host_down
(host)This method is called whenever a host is considered to be down, whether by Cassandra’s gossip exchange or when the driver failed to establish any connections to it.
- Void
- Return value of this method is ignored.
host_found
(host)This method is called whenever a host is discovered by the driver,
whether because it is a completely new node or if its
Host#datacenter or Host#rack have changed.
- Void
- Return value of this method is ignored.
host_lost
(host)This method is called whenever a host leaves the cluster, whether
because it is completely gone or if its Host#datacenter or
Host#rack have changed.
- Void
- Return value of this method is ignored.
keyspace_created
(keyspace)This method is called whenever a new keyspace is created.
- Void
- Return value of this method is ignored.
keyspace_changed
(keyspace)This method is called whenever an existing keyspace is changed. This happens when a new table is created or an existing table is dropped or altered.
- Void
- Return value of this method is ignored.
keyspace_dropped
(keyspace)This method is called whenever an existing keyspace is dropped.
- Void
- Return value of this method is ignored.