Package org.apache.hadoop.hdfs.server.namenode.ha

Annotation Type ReadOnly

@Inherited
@Retention(RUNTIME)
@Target(METHOD)
@Private
@Evolving
public @interface ReadOnly

Marker interface used to annotate methods that are readonly.

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element	Description
boolean	activeOnly
boolean	atimeAffected
boolean	isCoordinated

Element Detail

atimeAffected

boolean atimeAffected

Returns:

if true, the annotated method may update the last accessed time while performing its read, if access time is enabled.

Default:

false

activeOnly

boolean activeOnly

Returns:

if true, the target method should only be invoked on the active namenode. This applies to operations that need to access information that is only available on the active namenode.

Default:

false

isCoordinated

boolean isCoordinated

Returns:

if true, when processing the rpc call of the target method, the server side will wait if server state id is behind client (msync). If false, the method will be processed regardless of server side state.

Default:

false