Package org.apache.hadoop.fs

Class Stat

java.lang.Object

org.apache.hadoop.util.Shell

org.apache.hadoop.fs.Stat

@LimitedPrivate({"HDFS","MapReduce"})
@Evolving
public class Stat
extends Shell

Wrapper for the Unix stat(1) command. Used to workaround the lack of lstat(2) in Java 6.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.util.Shell

Shell.CommandExecutor, Shell.ExitCodeException, Shell.OSType, Shell.ShellCommandExecutor

Field Summary

Fields inherited from class org.apache.hadoop.util.Shell

ENV_DEBUG_OPTS, ENV_HADOOP_HOME, ENV_HADOOP_OPTS, ENV_MAPR_JMX_OPTS, ENV_NAME_REGEX, FREEBSD, inheritParentEnv, isSetsidAvailable, LINK_COMMAND, LINUX, LOG, MAC, osType, OTHER, PPC_64, READ_LINK_COMMAND, SET_GROUP_COMMAND, SET_OWNER_COMMAND, SET_PERMISSION_COMMAND, SOLARIS, SYSPROP_HADOOP_HOME_DIR, timeOutInterval, TOKEN_SEPARATOR_REGEX, USER_NAME_COMMAND, WINDOWS, WINDOWS_MAX_SHELL_LENGHT, WINDOWS_MAX_SHELL_LENGTH, WindowsProcessLaunchLock, WINUTILS

Constructor Summary

Constructors

Constructor	Description
Stat(Path path, long blockSize, boolean deref, FileSystem fs)

Method Summary

Modifier and Type	Method	Description
protected java.lang.String[]	getExecString()	return an array containing the command name and its parameters.
FileStatus	getFileStatus()
static boolean	isAvailable()	Whether Stat is supported on the current platform.
protected void	parseExecResult(java.io.BufferedReader lines)	Parse the execution result.

Methods inherited from class org.apache.hadoop.util.Shell

appendScriptExtension, appendScriptExtension, bashQuote, checkIsBashSupported, checkUserExists, checkWindowsCommandLineLength, destroyAllShellProcesses, execCommand, execCommand, execCommand, getAllShells, getCheckProcessIsAliveCommand, getEnvironment, getEnvironmentVariableRegex, getExitCode, getGetPermissionCommand, getGroupsCommand, getGroupsForUserCommand, getGroupsIDForUserCommand, getHadoopHome, getMemlockLimit, getProcess, getQualifiedBin, getQualifiedBinPath, getReadlinkCommand, getRunScriptCommand, getSetOwnerCommand, getSetPermissionCommand, getSetPermissionCommand, getSignalKillCommand, getSymlinkCommand, getUsersForNetgroupCommand, getWaitingThread, getWinUtilsFile, getWinUtilsPath, hasWinutilsPath, isJava7OrAbove, isJavaVersionAtLeast, isTimedOut, run, setEnvironment, setWorkingDirectory

Methods inherited from class java.lang.Object

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

Constructor Detail

Stat

public Stat(Path path,
            long blockSize,
            boolean deref,
            FileSystem fs)
     throws java.io.IOException

Throws:

java.io.IOException

Method Detail

getFileStatus

public FileStatus getFileStatus()
                         throws java.io.IOException

Throws:

java.io.IOException

isAvailable

public static boolean isAvailable()

Whether Stat is supported on the current platform.

Returns:

if is available true, not false.

getExecString

protected java.lang.String[] getExecString()

Description copied from class: Shell

return an array containing the command name and its parameters.

Specified by:

getExecString in class Shell

Returns:

exec string array.

parseExecResult

protected void parseExecResult(java.io.BufferedReader lines)
                        throws java.io.IOException

Description copied from class: Shell

Parse the execution result.

Specified by:

parseExecResult in class Shell

Parameters:

lines - lines.

Throws:

java.io.IOException - raised on errors performing I/O.