Package alluxio.worker.dora

Interface DoraWorker

All Superinterfaces:

DataWorker, Server<WorkerNetAddress>, SessionCleanable, Worker

public interface DoraWorker
extends DataWorker, SessionCleanable

A block worker in the Alluxio system.

Method Summary

Modifier and Type	Method	Description
com.google.common.util.concurrent.ListenableFuture<java.util.List<alluxio.grpc.RouteFailure>>	copy(java.util.List<alluxio.grpc.Route> routes, alluxio.grpc.UfsReadOptions readOptions, alluxio.grpc.WriteOptions writeOptions)	Copies files from src to dst.
BlockReader	createFileReader(java.lang.String fileId, long offset, boolean positionShort, alluxio.proto.dataserver.Protocol.OpenUfsBlockOptions options)	Creates the file reader to read from Alluxio dora.
FileInfo	getFileInfo(java.lang.String fileId, alluxio.grpc.GetStatusPOptions options)	Gets the file information.
boolean	invalidateCachedFile(FileInfo fileInfo)	Invalidate all cached pages of this file.
UfsStatus[]	listStatus(java.lang.String path, alluxio.grpc.ListStatusPOptions options)	List status from Under File System.
com.google.common.util.concurrent.ListenableFuture<java.util.List<alluxio.grpc.FileFailure>>	load(java.util.List<alluxio.grpc.File> files, alluxio.grpc.UfsReadOptions options)	Loads files from UFS to Alluxio.

Methods inherited from interface alluxio.worker.DataWorker

getWorkerId

Methods inherited from interface alluxio.Server

close, getDependencies, getName, getServices, start, stop

Methods inherited from interface alluxio.worker.SessionCleanable

cleanupSession

Method Detail

getFileInfo

FileInfo getFileInfo(java.lang.String fileId,
                     alluxio.grpc.GetStatusPOptions options)
              throws java.io.IOException,
                     AccessControlException

Gets the file information.

Parameters:

fileId - the file id

options - the options for the GetStatusPRequest

Returns:

the file info

Throws:

java.io.IOException

AccessControlException

listStatus

@Nullable
UfsStatus[] listStatus(java.lang.String path,
                       alluxio.grpc.ListStatusPOptions options)
                throws java.io.IOException,
                       AccessControlException

List status from Under File System. Please refer to UnderFileSystem.listStatus().

Parameters:

path - the path of a dir or file

options - the option for listStatus()

Returns:

An array with the statuses of the files and directories in the directory denoted by this abstract pathname. The array will be empty if the directory is empty. Returns null if this abstract pathname does not denote a directory.

Throws:

java.io.IOException

AccessControlException

invalidateCachedFile

boolean invalidateCachedFile(FileInfo fileInfo)

Invalidate all cached pages of this file.

Parameters:

fileInfo - the FileInfo of this file. Cached pages are identified by PageId and PageId is generated from fileInfo.fullUfsPath.

Returns:

successful or not

createFileReader

BlockReader createFileReader(java.lang.String fileId,
                             long offset,
                             boolean positionShort,
                             alluxio.proto.dataserver.Protocol.OpenUfsBlockOptions options)
                      throws java.io.IOException,
                             AccessControlException

Creates the file reader to read from Alluxio dora. Owner of this block reader must close it or lock will leak.

Parameters:

fileId - the ID of the UFS file

offset - the offset within the block

positionShort - whether the operation is using positioned read to a small buffer size

options - the options

Returns:

a block reader to read data from

Throws:

java.io.IOException - if it fails to get block reader

AccessControlException

load

com.google.common.util.concurrent.ListenableFuture<java.util.List<alluxio.grpc.FileFailure>> load(java.util.List<alluxio.grpc.File> files,
                                                                                                  alluxio.grpc.UfsReadOptions options)

Loads files from UFS to Alluxio.

Parameters:

files - the files to load

options -

Returns:

a list of failed files

copy

com.google.common.util.concurrent.ListenableFuture<java.util.List<alluxio.grpc.RouteFailure>> copy(java.util.List<alluxio.grpc.Route> routes,
                                                                                                   alluxio.grpc.UfsReadOptions readOptions,
                                                                                                   alluxio.grpc.WriteOptions writeOptions)

Copies files from src to dst.

Parameters:

routes - the files to copy

readOptions - the options for reading

writeOptions - the options for writing

Returns:

a list of failed files