com.datastax.driver.core.policies

Interface ReconnectionPolicy

All Known Implementing Classes:

ConstantReconnectionPolicy, ExponentialReconnectionPolicy

public interface ReconnectionPolicy

Policy that decides how often the reconnection to a dead node is attempted.

Each time a node is detected dead (because a connection error occurs), a new ReconnectionSchedule instance is created (through the newSchedule()). Then each call to the ReconnectionPolicy.ReconnectionSchedule.nextDelayMs() method of this instance will decide when the next reconnection attempt to this node will be tried.

Note that if the driver receives a push notification from the Cassandra cluster that a node is UP, any existing ReconnectionSchedule on that node will be cancelled and a new one will be created (in effect, the driver reset the scheduler).

The default ExponentialReconnectionPolicy policy is usually adequate.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	ReconnectionPolicy.ReconnectionSchedule Schedules reconnection attempts to a node.

Method Summary

Modifier and Type	Method and Description
ReconnectionPolicy.ReconnectionSchedule	newSchedule() Creates a new schedule for reconnection attempts.

Method Detail

newSchedule

ReconnectionPolicy.ReconnectionSchedule newSchedule()

Creates a new schedule for reconnection attempts.

Returns:

the created schedule.