Package org.apache.hadoop.hdfs.protocol

Class CachePoolIterator

java.lang.Object

org.apache.hadoop.fs.BatchedRemoteIterator<String,CachePoolEntry>

org.apache.hadoop.hdfs.protocol.CachePoolIterator

All Implemented Interfaces:

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

@Private
@Evolving
public class CachePoolIterator
extends org.apache.hadoop.fs.BatchedRemoteIterator<String,CachePoolEntry>

CachePoolIterator is a remote iterator that iterates cache pools. 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 Object>, org.apache.hadoop.fs.BatchedRemoteIterator.BatchedListEntries<E extends Object>

Constructor Summary

Constructors

Constructor	Description
CachePoolIterator(ClientProtocol namenode, org.apache.hadoop.tracing.Tracer tracer)

Method Summary

Modifier and Type	Method	Description
String	elementToPrevKey(CachePoolEntry entry)
org.apache.hadoop.fs.BatchedRemoteIterator.BatchedEntries<CachePoolEntry>	makeRequest(String 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 Details

CachePoolIterator

public CachePoolIterator(ClientProtocol namenode,
 org.apache.hadoop.tracing.Tracer tracer)

Method Details

makeRequest

public org.apache.hadoop.fs.BatchedRemoteIterator.BatchedEntries<CachePoolEntry> makeRequest(String prevKey)
                                                                                      throws IOException

Specified by:

makeRequest in class org.apache.hadoop.fs.BatchedRemoteIterator<String,CachePoolEntry>

Throws:

IOException

elementToPrevKey

public String elementToPrevKey(CachePoolEntry entry)

Specified by:

elementToPrevKey in class org.apache.hadoop.fs.BatchedRemoteIterator<String,CachePoolEntry>