Package org.apache.hadoop.hdfs.protocol

Class CacheDirectiveIterator

java.lang.Object

org.apache.hadoop.fs.BatchedRemoteIterator<java.lang.Long,CacheDirectiveEntry>

org.apache.hadoop.hdfs.protocol.CacheDirectiveIterator

All Implemented Interfaces:

org.apache.hadoop.fs.RemoteIterator<CacheDirectiveEntry>

@Private
@Evolving
public class CacheDirectiveIterator
extends org.apache.hadoop.fs.BatchedRemoteIterator<java.lang.Long,CacheDirectiveEntry>

CacheDirectiveIterator is a remote iterator that iterates cache directives. It supports retrying in case of namenode failover.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.fs.BatchedRemoteIterator

org.apache.hadoop.fs.BatchedRemoteIterator.BatchedEntries<E extends java.lang.Object>, org.apache.hadoop.fs.BatchedRemoteIterator.BatchedListEntries<E extends java.lang.Object>

Constructor Summary

Constructors

Constructor	Description
CacheDirectiveIterator(ClientProtocol namenode, CacheDirectiveInfo filter, org.apache.hadoop.tracing.Tracer tracer)

Method Summary

Modifier and Type	Method	Description
java.lang.Long	elementToPrevKey(CacheDirectiveEntry entry)
org.apache.hadoop.fs.BatchedRemoteIterator.BatchedEntries<CacheDirectiveEntry>	makeRequest(java.lang.Long prevKey)

Methods inherited from class org.apache.hadoop.fs.BatchedRemoteIterator

hasNext, next

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheDirectiveIterator

public CacheDirectiveIterator(ClientProtocol namenode,
                              CacheDirectiveInfo filter,
                              org.apache.hadoop.tracing.Tracer tracer)

Method Detail

makeRequest

public org.apache.hadoop.fs.BatchedRemoteIterator.BatchedEntries<CacheDirectiveEntry> makeRequest(java.lang.Long prevKey)
                                                                                           throws java.io.IOException

Specified by:

makeRequest in class org.apache.hadoop.fs.BatchedRemoteIterator<java.lang.Long,CacheDirectiveEntry>

Throws:

java.io.IOException

elementToPrevKey

public java.lang.Long elementToPrevKey(CacheDirectiveEntry entry)

Specified by:

elementToPrevKey in class org.apache.hadoop.fs.BatchedRemoteIterator<java.lang.Long,CacheDirectiveEntry>