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org.apache.whirr.service
Interface ClusterActionHandler

All Known Implementing Classes:

BasicServerClusterActionHandler, CassandraClusterActionHandler, ChefClusterActionHandler, ClusterActionHandlerSupport, ElasticSearchHandler, GangliaMetadClusterActionHandler, GangliaMonitorClusterActionHandler, HadoopClusterActionHandler, HadoopDataNodeClusterActionHandler, HadoopJobTrackerClusterActionHandler, HadoopNameNodeClusterActionHandler, HadoopTaskTrackerClusterActionHandler, HamaClusterActionHandler, HamaGroomServerClusterActionHandler, HamaMasterClusterActionHandler, HBaseAvroServerClusterActionHandler, HBaseClusterActionHandler, HBaseMasterClusterActionHandler, HBaseRegionServerClusterActionHandler, HBaseRestServerClusterActionHandler, HBaseThriftServerClusterActionHandler, MahoutClientClusterActionHandler, MapReduceJobHistoryServerHandler, NoopClusterActionHandler, PigClientClusterActionHandler, PuppetClusterActionHandler, PuppetInstallClusterActionHandler, SolrClusterActionHandler, YarnHandler, YarnNodeManagerHandler, YarnResourceManagerHandler, ZooKeeperClusterActionHandler

public interface ClusterActionHandler

A callback interface for cluster actions that apply to instances in a given role.

Implementation note. ClusterActionHandler implementations are discovered using a Service Provider Interface (SPI), described in ServiceLoader.

Field Summary

static String	BOOTSTRAP_ACTION
static String	CLEANUP_ACTION
static String	CONFIGURE_ACTION
static String	DESTROY_ACTION
static String	START_ACTION
static String	STOP_ACTION

Method Summary

void	afterAction(ClusterActionEvent event) Called after the action has been performed.
void	beforeAction(ClusterActionEvent event) Called before the action is performed, giving the implementation an opportunity to specify scripts that should be run as a part of this action.
String	getRole()

Field Detail

BOOTSTRAP_ACTION

static final String BOOTSTRAP_ACTION

See Also:

Constant Field Values

CONFIGURE_ACTION

static final String CONFIGURE_ACTION

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Constant Field Values

START_ACTION

static final String START_ACTION

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Constant Field Values

STOP_ACTION

static final String STOP_ACTION

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Constant Field Values

CLEANUP_ACTION

static final String CLEANUP_ACTION

See Also:

Constant Field Values

DESTROY_ACTION

static final String DESTROY_ACTION

See Also:

Constant Field Values

Method Detail

getRole

String getRole()

beforeAction

void beforeAction(ClusterActionEvent event)
                  throws IOException,
                         InterruptedException

Called before the action is performed, giving the implementation an opportunity to specify scripts that should be run as a part of this action.

Parameters:

event -

Throws:

IOException

InterruptedException

afterAction

void afterAction(ClusterActionEvent event)
                 throws IOException,
                        InterruptedException

Called after the action has been performed.

Parameters:

event -

Throws:

IOException

InterruptedException