org.apache.hadoop.fs.cosn

Class CosNFileSystem

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.fs.FileSystem

org.apache.hadoop.fs.cosn.CosNFileSystem

All Implemented Interfaces:

Closeable, AutoCloseable, org.apache.hadoop.conf.Configurable, org.apache.hadoop.fs.PathCapabilities, org.apache.hadoop.security.token.DelegationTokenIssuer

@InterfaceAudience.Private
 @InterfaceStability.Stable
public class CosNFileSystem
extends org.apache.hadoop.fs.FileSystem

The core CosN Filesystem implementation.

Nested Class Summary

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

org.apache.hadoop.fs.FileSystem.DirectoryEntries, org.apache.hadoop.fs.FileSystem.DirListingIterator<T extends org.apache.hadoop.fs.FileStatus>, org.apache.hadoop.fs.FileSystem.Statistics

Field Summary

Fields

Modifier and Type	Field and Description
static String	PATH_DELIMITER
static String	SCHEME

Fields inherited from class org.apache.hadoop.fs.FileSystem

DEFAULT_FS, FS_DEFAULT_NAME_KEY, SHUTDOWN_HOOK_PRIORITY, statistics, TRASH_PREFIX, USER_HOME_PREFIX

Constructor Summary

Constructors

Constructor and Description
CosNFileSystem()
CosNFileSystem(org.apache.hadoop.fs.cosn.NativeFileSystemStore store)

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.fs.FSDataOutputStream	append(org.apache.hadoop.fs.Path f, int bufferSize, org.apache.hadoop.util.Progressable progress) This optional operation is not yet supported.
void	close()
org.apache.hadoop.fs.FSDataOutputStream	create(org.apache.hadoop.fs.Path f, org.apache.hadoop.fs.permission.FsPermission permission, boolean overwrite, int bufferSize, short replication, long blockSize, org.apache.hadoop.util.Progressable progress)
org.apache.hadoop.fs.FSDataOutputStream	createNonRecursive(org.apache.hadoop.fs.Path f, org.apache.hadoop.fs.permission.FsPermission permission, EnumSet<org.apache.hadoop.fs.CreateFlag> flags, int bufferSize, short replication, long blockSize, org.apache.hadoop.util.Progressable progress)
boolean	delete(org.apache.hadoop.fs.Path f, boolean recursive)
String	getCanonicalServiceName()
long	getDefaultBlockSize()
org.apache.hadoop.fs.FileStatus	getFileStatus(org.apache.hadoop.fs.Path f)
String	getScheme() Return the protocol scheme for the FileSystem.
URI	getUri()
org.apache.hadoop.fs.Path	getWorkingDirectory()
void	initialize(URI name, org.apache.hadoop.conf.Configuration conf)
org.apache.hadoop.fs.FileStatus[]	listStatus(org.apache.hadoop.fs.Path f) If f is a file, this method will make a single call to COS.
boolean	mkDirRecursively(org.apache.hadoop.fs.Path f, org.apache.hadoop.fs.permission.FsPermission permission) Recursively create a directory.
boolean	mkdirs(org.apache.hadoop.fs.Path f, org.apache.hadoop.fs.permission.FsPermission permission)
org.apache.hadoop.fs.FSDataInputStream	open(org.apache.hadoop.fs.Path f, int bufferSize)
boolean	rename(org.apache.hadoop.fs.Path src, org.apache.hadoop.fs.Path dst)
void	setWorkingDirectory(org.apache.hadoop.fs.Path newDir) Set the working directory to the given directory.

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

access, append, append, appendFile, areSymlinksEnabled, cancelDeleteOnExit, canonicalizeUri, checkPath, clearStatistics, closeAll, closeAllForUGI, completeLocalOutput, concat, copyFromLocalFile, copyFromLocalFile, copyFromLocalFile, copyFromLocalFile, copyToLocalFile, copyToLocalFile, copyToLocalFile, create, create, create, create, create, create, create, create, create, create, create, create, createDataInputStreamBuilder, createDataInputStreamBuilder, createDataOutputStreamBuilder, createFile, createMultipartUploader, createNewFile, createNonRecursive, createNonRecursive, createPathHandle, createSnapshot, createSnapshot, createSymlink, delete, deleteOnExit, deleteSnapshot, enableSymlinks, exists, fixRelativePart, get, get, get, getAclStatus, getAdditionalTokenIssuers, getAllStatistics, getAllStoragePolicies, getBlockSize, getCanonicalUri, getChildFileSystems, getContentSummary, getDefaultBlockSize, getDefaultPort, getDefaultReplication, getDefaultReplication, getDefaultUri, getDelegationToken, getFileBlockLocations, getFileBlockLocations, getFileChecksum, getFileChecksum, getFileLinkStatus, getFileSystemClass, getFSofPath, getGlobalStorageStatistics, getHomeDirectory, getInitialWorkingDirectory, getLength, getLinkTarget, getLocal, getName, getNamed, getPathHandle, getQuotaUsage, getReplication, getServerDefaults, getServerDefaults, getStatistics, getStatistics, getStatus, getStatus, getStoragePolicy, getStorageStatistics, getTrashRoot, getTrashRoots, getUsed, getUsed, getXAttr, getXAttrs, getXAttrs, globStatus, globStatus, hasPathCapability, isDirectory, isFile, listCorruptFileBlocks, listFiles, listLocatedStatus, listLocatedStatus, listStatus, listStatus, listStatus, listStatusBatch, listStatusIterator, listXAttrs, makeQualified, mkdirs, mkdirs, modifyAclEntries, moveFromLocalFile, moveFromLocalFile, moveToLocalFile, msync, newInstance, newInstance, newInstance, newInstanceLocal, open, open, open, openFile, openFile, openFileWithOptions, openFileWithOptions, primitiveCreate, primitiveMkdir, primitiveMkdir, printStatistics, processDeleteOnExit, removeAcl, removeAclEntries, removeDefaultAcl, removeXAttr, rename, renameSnapshot, resolveLink, resolvePath, satisfyStoragePolicy, setAcl, setDefaultUri, setDefaultUri, setOwner, setPermission, setQuota, setQuotaByStorageType, setReplication, setStoragePolicy, setTimes, setVerifyChecksum, setWriteChecksum, setXAttr, setXAttr, startLocalOutput, supportsSymlinks, truncate, unsetStoragePolicy

Methods inherited from class org.apache.hadoop.conf.Configured

getConf, setConf

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.security.token.DelegationTokenIssuer

addDelegationTokens, collectDelegationTokens

Field Detail

SCHEME

public static final String SCHEME

See Also:

Constant Field Values

PATH_DELIMITER

public static final String PATH_DELIMITER

See Also:

Constant Field Values

Constructor Detail

CosNFileSystem

public CosNFileSystem()

CosNFileSystem

public CosNFileSystem(org.apache.hadoop.fs.cosn.NativeFileSystemStore store)

Method Detail

getScheme

public String getScheme()

Return the protocol scheme for the FileSystem.

Overrides:

getScheme in class org.apache.hadoop.fs.FileSystem

Returns:

cosn

initialize

public void initialize(URI name,
                       org.apache.hadoop.conf.Configuration conf)
                throws IOException

Overrides:

initialize in class org.apache.hadoop.fs.FileSystem

Throws:

IOException

append

public org.apache.hadoop.fs.FSDataOutputStream append(org.apache.hadoop.fs.Path f,
                                                      int bufferSize,
                                                      org.apache.hadoop.util.Progressable progress)
                                               throws IOException

This optional operation is not yet supported.

Specified by:

append in class org.apache.hadoop.fs.FileSystem

Throws:

IOException

create

public org.apache.hadoop.fs.FSDataOutputStream create(org.apache.hadoop.fs.Path f,
                                                      org.apache.hadoop.fs.permission.FsPermission permission,
                                                      boolean overwrite,
                                                      int bufferSize,
                                                      short replication,
                                                      long blockSize,
                                                      org.apache.hadoop.util.Progressable progress)
                                               throws IOException

Specified by:

create in class org.apache.hadoop.fs.FileSystem

Throws:

IOException

createNonRecursive

public org.apache.hadoop.fs.FSDataOutputStream createNonRecursive(org.apache.hadoop.fs.Path f,
                                                                  org.apache.hadoop.fs.permission.FsPermission permission,
                                                                  EnumSet<org.apache.hadoop.fs.CreateFlag> flags,
                                                                  int bufferSize,
                                                                  short replication,
                                                                  long blockSize,
                                                                  org.apache.hadoop.util.Progressable progress)
                                                           throws IOException

Overrides:

createNonRecursive in class org.apache.hadoop.fs.FileSystem

Throws:

IOException

delete

public boolean delete(org.apache.hadoop.fs.Path f,
                      boolean recursive)
               throws IOException

Specified by:

delete in class org.apache.hadoop.fs.FileSystem

Throws:

IOException

getFileStatus

public org.apache.hadoop.fs.FileStatus getFileStatus(org.apache.hadoop.fs.Path f)
                                              throws IOException

Specified by:

getFileStatus in class org.apache.hadoop.fs.FileSystem

Throws:

IOException

getUri

public URI getUri()

Specified by:

getUri in class org.apache.hadoop.fs.FileSystem

listStatus

public org.apache.hadoop.fs.FileStatus[] listStatus(org.apache.hadoop.fs.Path f)
                                             throws IOException

If f is a file, this method will make a single call to COS. If f is a directory, this method will make a maximum of ( n / 199) + 2 calls to cos, where n is the total number of files and directories contained directly in f.

Specified by:

listStatus in class org.apache.hadoop.fs.FileSystem

Throws:

IOException

mkdirs

public boolean mkdirs(org.apache.hadoop.fs.Path f,
                      org.apache.hadoop.fs.permission.FsPermission permission)
               throws IOException

Specified by:

mkdirs in class org.apache.hadoop.fs.FileSystem

Throws:

IOException

mkDirRecursively

public boolean mkDirRecursively(org.apache.hadoop.fs.Path f,
                                org.apache.hadoop.fs.permission.FsPermission permission)
                         throws IOException

Recursively create a directory.

Parameters:

f - Absolute path to the directory.

permission - Directory permissions. Permission does not work for the CosN filesystem currently.

Returns:

Return true if the creation was successful, throw a IOException.

Throws:

IOException - The specified path already exists or an error creating the path.

open

public org.apache.hadoop.fs.FSDataInputStream open(org.apache.hadoop.fs.Path f,
                                                   int bufferSize)
                                            throws IOException

Specified by:

open in class org.apache.hadoop.fs.FileSystem

Throws:

IOException

rename

public boolean rename(org.apache.hadoop.fs.Path src,
                      org.apache.hadoop.fs.Path dst)
               throws IOException

Specified by:

rename in class org.apache.hadoop.fs.FileSystem

Throws:

IOException

getDefaultBlockSize

public long getDefaultBlockSize()

Overrides:

getDefaultBlockSize in class org.apache.hadoop.fs.FileSystem

setWorkingDirectory

public void setWorkingDirectory(org.apache.hadoop.fs.Path newDir)

Set the working directory to the given directory.

Specified by:

setWorkingDirectory in class org.apache.hadoop.fs.FileSystem

getWorkingDirectory

public org.apache.hadoop.fs.Path getWorkingDirectory()

Specified by:

getWorkingDirectory in class org.apache.hadoop.fs.FileSystem

getCanonicalServiceName

public String getCanonicalServiceName()

Specified by:

getCanonicalServiceName in interface org.apache.hadoop.security.token.DelegationTokenIssuer

Overrides:

getCanonicalServiceName in class org.apache.hadoop.fs.FileSystem

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class org.apache.hadoop.fs.FileSystem

Throws:

IOException