com.datastax.driver.core.policies

Class NoSpeculativeExecutionPolicy

java.lang.Object

com.datastax.driver.core.policies.NoSpeculativeExecutionPolicy

All Implemented Interfaces:

SpeculativeExecutionPolicy

public class NoSpeculativeExecutionPolicy
extends Object
implements SpeculativeExecutionPolicy

A SpeculativeExecutionPolicy that never schedules speculative executions.

Nested Class Summary

Nested classes/interfaces inherited from interface com.datastax.driver.core.policies.SpeculativeExecutionPolicy

SpeculativeExecutionPolicy.SpeculativeExecutionPlan

Field Summary

Fields

Modifier and Type	Field and Description
static NoSpeculativeExecutionPolicy	INSTANCE The single instance (this class is stateless).

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Gets invoked at cluster shutdown.
void	init(Cluster cluster) Gets invoked at cluster startup.
SpeculativeExecutionPolicy.SpeculativeExecutionPlan	newPlan(String loggedKeyspace, Statement statement) Returns the plan to use for a new query.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

INSTANCE

public static final NoSpeculativeExecutionPolicy INSTANCE

The single instance (this class is stateless).

Method Detail

newPlan

public SpeculativeExecutionPolicy.SpeculativeExecutionPlan newPlan(String loggedKeyspace,
                                                          Statement statement)

Description copied from interface: SpeculativeExecutionPolicy

Returns the plan to use for a new query.

Specified by:

newPlan in interface SpeculativeExecutionPolicy

Parameters:

loggedKeyspace - the currently logged keyspace (the one set through either Cluster.connect(String) or by manually doing a USE query) for the session on which this plan need to be built. This can be null if the corresponding session has no keyspace logged in.

statement - the query for which to build a plan.

Returns:

the plan.

init

public void init(Cluster cluster)

Description copied from interface: SpeculativeExecutionPolicy

Gets invoked at cluster startup.

Specified by:

init in interface SpeculativeExecutionPolicy

Parameters:

cluster - the cluster that this policy is associated with.

close

public void close()

Description copied from interface: SpeculativeExecutionPolicy

Gets invoked at cluster shutdown. This gives the policy the opportunity to perform some cleanup, for instance stop threads that it might have started.

Specified by:

close in interface SpeculativeExecutionPolicy