org.apache.oozie.dependency

Class HCatURIHandler

java.lang.Object

org.apache.oozie.dependency.HCatURIHandler

All Implemented Interfaces:

URIHandler

public class HCatURIHandler
extends Object
implements URIHandler

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.oozie.dependency.URIHandler

URIHandler.Context, URIHandler.DependencyType

Constructor Summary

Constructors

Constructor and Description
HCatURIHandler()

Method Summary

Methods

Modifier and Type	Method and Description
void	destroy() Destroy the URIHandler
boolean	exists(URI uri, org.apache.hadoop.conf.Configuration conf, String user) Check if the dependency identified by the URI is available
boolean	exists(URI uri, URIHandler.Context context) Check if the dependency identified by the URI is available
List<Class<?>>	getClassesForLauncher() Get list of classes to ship to launcher for LauncherURIHandler
URIHandler.Context	getContext(URI uri, org.apache.hadoop.conf.Configuration conf, String user) Get the Context which can be used to access URI of the same scheme and host
URIHandler.DependencyType	getDependencyType(URI uri) Get the dependency type of the URI.
Class<? extends org.apache.oozie.action.hadoop.LauncherURIHandler>	getLauncherURIHandlerClass() Get the URIHandler that will be used to handle the supported schemes in launcher
Set<String>	getSupportedSchemes() Get the list of uri schemes supported by this URIHandler
String	getURIWithDoneFlag(String uri, String doneFlag) Get the URI based on the done flag
void	init(org.apache.hadoop.conf.Configuration conf) Initialize the URIHandler
void	registerForNotification(URI uri, org.apache.hadoop.conf.Configuration conf, String user, String actionID) Register for notifications in case of a push dependency
boolean	unregisterFromNotification(URI uri, String actionID) Unregister from notifications in case of a push dependency
void	validate(String uri) Check whether the URI is valid or not

Methods inherited from class java.lang.Object

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

Constructor Detail

HCatURIHandler

public HCatURIHandler()

Method Detail

init

public void init(org.apache.hadoop.conf.Configuration conf)

Description copied from interface: URIHandler

Initialize the URIHandler

Specified by:

init in interface URIHandler

Parameters:

conf - Configuration for initialization

getSupportedSchemes

public Set<String> getSupportedSchemes()

Description copied from interface: URIHandler

Get the list of uri schemes supported by this URIHandler

Specified by:

getSupportedSchemes in interface URIHandler

Returns:

supported list of uri schemes

getLauncherURIHandlerClass

public Class<? extends org.apache.oozie.action.hadoop.LauncherURIHandler> getLauncherURIHandlerClass()

Description copied from interface: URIHandler

Get the URIHandler that will be used to handle the supported schemes in launcher

Specified by:

getLauncherURIHandlerClass in interface URIHandler

Returns:

LauncherURIHandler that handles URI in the launcher

getClassesForLauncher

public List<Class<?>> getClassesForLauncher()

Description copied from interface: URIHandler

Get list of classes to ship to launcher for LauncherURIHandler

Specified by:

getClassesForLauncher in interface URIHandler

Returns:

list of classes to ship to launcher

getDependencyType

public URIHandler.DependencyType getDependencyType(URI uri)
                                            throws URIHandlerException

Description copied from interface: URIHandler

Get the dependency type of the URI. When the availability of the URI is to be determined by polling the type is DependencyType.PULL, and when the availability is received through notifications from a external entity like a JMS server the type is DependencyType.PUSH

Specified by:

getDependencyType in interface URIHandler

Returns:

dependency type of URI

Throws:

URIHandlerException

registerForNotification

public void registerForNotification(URI uri,
                           org.apache.hadoop.conf.Configuration conf,
                           String user,
                           String actionID)
                             throws URIHandlerException

Description copied from interface: URIHandler

Register for notifications in case of a push dependency

Specified by:

registerForNotification in interface URIHandler

Parameters:

uri - The URI to check for availability

conf - Configuration to access the URI

user - name of the user the URI should be accessed as

actionID - The id of action which depends on the availability of the uri

Throws:

URIHandlerException

unregisterFromNotification

public boolean unregisterFromNotification(URI uri,
                                 String actionID)

Description copied from interface: URIHandler

Unregister from notifications in case of a push dependency

Specified by:

unregisterFromNotification in interface URIHandler

Parameters:

uri - The URI to be removed from missing dependency

actionID - The id of action which was dependent on the uri.

getContext

public URIHandler.Context getContext(URI uri,
                            org.apache.hadoop.conf.Configuration conf,
                            String user)
                              throws URIHandlerException

Description copied from interface: URIHandler

Get the Context which can be used to access URI of the same scheme and host

Specified by:

getContext in interface URIHandler

Parameters:

uri - URI which identifies the scheme and host

conf - Configuration to access the URI

user - name of the user the URI should be accessed as

Returns:

Context to access URIs with same scheme and host

Throws:

URIHandlerException

exists

public boolean exists(URI uri,
             URIHandler.Context context)
               throws URIHandlerException

Description copied from interface: URIHandler

Check if the dependency identified by the URI is available

Specified by:

exists in interface URIHandler

Parameters:

uri - URI of the dependency

context - Context to access the URI

Returns:

true if the URI exists; false if the URI does not exist

Throws:

URIHandlerException

exists

public boolean exists(URI uri,
             org.apache.hadoop.conf.Configuration conf,
             String user)
               throws URIHandlerException

Description copied from interface: URIHandler

Check if the dependency identified by the URI is available

Specified by:

exists in interface URIHandler

Parameters:

uri - URI of the dependency

conf - Configuration to access the URI

user - name of the user the URI should be accessed as. If null the logged in user is used.

Returns:

true if the URI exists; false if the URI does not exist

Throws:

URIHandlerException

getURIWithDoneFlag

public String getURIWithDoneFlag(String uri,
                        String doneFlag)
                          throws URIHandlerException

Description copied from interface: URIHandler

Get the URI based on the done flag

Specified by:

getURIWithDoneFlag in interface URIHandler

Parameters:

uri - URI of the dependency

doneFlag - flag that determines URI availability

Returns:

the final URI with the doneFlag incorporated

Throws:

URIHandlerException

validate

public void validate(String uri)
              throws URIHandlerException

Description copied from interface: URIHandler

Check whether the URI is valid or not

Specified by:

validate in interface URIHandler

Throws:

URIHandlerException

destroy

public void destroy()

Description copied from interface: URIHandler

Destroy the URIHandler

Specified by:

destroy in interface URIHandler