org.apache.hadoop.yarn.util
Class FSDownload

java.lang.Object
  org.apache.hadoop.yarn.util.FSDownload

All Implemented Interfaces:

Callable<org.apache.hadoop.fs.Path>

@InterfaceAudience.LimitedPrivate(value={"YARN","MapReduce"})
public class FSDownload
extends Object
implements Callable<org.apache.hadoop.fs.Path>

Download a single URL to the local disk.

Constructor Summary

FSDownload(org.apache.hadoop.fs.FileContext files, org.apache.hadoop.security.UserGroupInformation ugi, org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.Path destDirPath, org.apache.hadoop.yarn.api.records.LocalResource resource)

FSDownload(org.apache.hadoop.fs.FileContext files, org.apache.hadoop.security.UserGroupInformation ugi, org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.Path destDirPath, org.apache.hadoop.yarn.api.records.LocalResource resource, com.google.common.cache.LoadingCache<org.apache.hadoop.fs.Path,Future<org.apache.hadoop.fs.FileStatus>> statCache)

Method Summary

org.apache.hadoop.fs.Path	call()
static com.google.common.cache.CacheLoader<org.apache.hadoop.fs.Path,Future<org.apache.hadoop.fs.FileStatus>>	createStatusCacheLoader(org.apache.hadoop.conf.Configuration conf) Creates the cache loader for the status loading cache.

Methods inherited from class java.lang.Object

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

Constructor Detail

FSDownload

public FSDownload(org.apache.hadoop.fs.FileContext files,
                  org.apache.hadoop.security.UserGroupInformation ugi,
                  org.apache.hadoop.conf.Configuration conf,
                  org.apache.hadoop.fs.Path destDirPath,
                  org.apache.hadoop.yarn.api.records.LocalResource resource)

FSDownload

public FSDownload(org.apache.hadoop.fs.FileContext files,
                  org.apache.hadoop.security.UserGroupInformation ugi,
                  org.apache.hadoop.conf.Configuration conf,
                  org.apache.hadoop.fs.Path destDirPath,
                  org.apache.hadoop.yarn.api.records.LocalResource resource,
                  com.google.common.cache.LoadingCache<org.apache.hadoop.fs.Path,Future<org.apache.hadoop.fs.FileStatus>> statCache)

Method Detail

createStatusCacheLoader

public static com.google.common.cache.CacheLoader<org.apache.hadoop.fs.Path,Future<org.apache.hadoop.fs.FileStatus>> createStatusCacheLoader(org.apache.hadoop.conf.Configuration conf)

Creates the cache loader for the status loading cache. This should be used to create an instance of the status cache that is passed into the FSDownload constructor.

call

public org.apache.hadoop.fs.Path call()
                               throws Exception

Specified by:

call in interface Callable<org.apache.hadoop.fs.Path>

Throws:

Exception