Package org.apache.hadoop.hdfs.server.federation.router

Class RemoteParam

java.lang.Object

org.apache.hadoop.hdfs.server.federation.router.RemoteParam

public class RemoteParam
extends Object

A dynamically assignable parameter that is location-specific.

There are 2 ways this mapping is determined:

• Default: Uses the RemoteLocationContext's destination
• Map: Uses the value of the RemoteLocationContext key provided in the parameter map.

Constructor Summary

Constructors

Constructor	Description
RemoteParam()	Constructs a default remote parameter.
RemoteParam(Map<? extends RemoteLocationContext,? extends Object> map)	Constructs a map based remote parameter.

Method Summary

Modifier and Type	Method	Description
Object	getParameterForContext(RemoteLocationContext context)	Determine the appropriate value for this parameter based on the location.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

RemoteParam

public RemoteParam()

Constructs a default remote parameter. Always maps the value to the destination of the provided RemoteLocationContext.

RemoteParam

public RemoteParam(Map<? extends RemoteLocationContext,? extends Object> map)

Constructs a map based remote parameter. Determines the value using the provided RemoteLocationContext as a key into the map.

Parameters:

map - Map with RemoteLocationContext keys.

Method Details

getParameterForContext

public Object getParameterForContext(RemoteLocationContext context)

Determine the appropriate value for this parameter based on the location.

Parameters:

context - Context identifying the location.

Returns:

A parameter specific to this location.

toString

public String toString()

Overrides:

toString in class Object