|
||||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | |||||||||
java.lang.Objectorg.apache.hadoop.lib.server.BaseService
@InterfaceAudience.Private public abstract class BaseService
Convenience class implementing the Service interface.
| Constructor Summary | |
|---|---|
BaseService(String prefix)
Service constructor. |
|
| Method Summary | |
|---|---|
void |
destroy()
Destroy the services. |
protected String |
getPrefix()
Returns the service prefix. |
protected String |
getPrefixedName(String name)
Returns the full prefixed name of a service property. |
protected Server |
getServer()
Returns the server owning the service. |
protected org.apache.hadoop.conf.Configuration |
getServiceConfig()
Returns the service configuration properties. |
Class[] |
getServiceDependencies()
Returns the service dependencies of this service. |
protected abstract void |
init()
Initializes the server. |
void |
init(Server server)
Initializes the service. |
void |
postInit()
Post initializes the service. |
void |
serverStatusChange(Server.Status oldStatus,
Server.Status newStatus)
Notification callback when the server changes its status. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Methods inherited from interface org.apache.hadoop.lib.server.Service |
|---|
getInterface |
| Constructor Detail |
|---|
public BaseService(String prefix)
prefix - service prefix.| Method Detail |
|---|
public final void init(Server server)
throws ServiceException
#SERVER#.#SERVICE#. prefix). The property names are then
trimmed from the #SERVER#.#SERVICE#. prefix.
After collecting the service properties it delegates to the
init() method.
init in interface Serviceserver - the server initializing the service, give access to the
server context.
ServiceException - thrown if the service could not be initialized.
public void postInit()
throws ServiceException
Server after all services of the server have been initialized.
This method does a NOP.
postInit in interface ServiceServiceException - thrown if the service could not be
post-initialized.public void destroy()
Server owning the service is being destroyed.
This method does a NOP.
destroy in interface Servicepublic Class[] getServiceDependencies()
getServiceDependencies in interface Service
public void serverStatusChange(Server.Status oldStatus,
Server.Status newStatus)
throws ServiceException
serverStatusChange in interface ServiceoldStatus - old server status.newStatus - new server status.
ServiceException - thrown if the service could not process the status change.protected String getPrefix()
protected Server getServer()
protected String getPrefixedName(String name)
name - of the property.
protected org.apache.hadoop.conf.Configuration getServiceConfig()
#SERVER#.#SERVICE#.
in the server configuration.
#SERVER#.#SERVICE#.
prefix.
protected abstract void init()
throws ServiceException
init(Server) after all service properties
(properties prefixed with
ServiceException - thrown if the service could not be initialized.
|
||||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | |||||||||