org.apache.hadoop.yarn.api

Enum ApplicationConstants.Environment

java.lang.Object

java.lang.Enum<ApplicationConstants.Environment>

org.apache.hadoop.yarn.api.ApplicationConstants.Environment

All Implemented Interfaces:

Serializable, Comparable<ApplicationConstants.Environment>

Enclosing interface:

ApplicationConstants

public static enum ApplicationConstants.Environment
extends Enum<ApplicationConstants.Environment>

Environment for Applications. Some of the environment variables for applications are final i.e. they cannot be modified by the applications.

Enum Constant Summary

Enum Constants

Enum Constant and Description
APP_CLASSPATH $APP_CLASSPATH
CLASSPATH $CLASSPATH
CLASSPATH_PREPEND_DISTCACHE $CLASSPATH_PREPEND_DISTCACHE Private, Windows specific
CONTAINER_ID $CONTAINER_ID Final, exported by NodeManager and non-modifiable by users.
HADOOP_CLASSPATH $HADOOP_CLASSPATH.
HADOOP_COMMON_HOME $HADOOP_COMMON_HOME
HADOOP_CONF_DIR $HADOOP_CONF_DIR Final, non-modifiable.
HADOOP_HDFS_HOME $HADOOP_HDFS_HOME
HADOOP_YARN_HOME $HADOOP_YARN_HOME
HOME $HOME Final, non-modifiable.
JAVA_HOME $JAVA_HOME
LD_LIBRARY_PATH $LD_LIBRARY_PATH
LOCAL_DIRS $LOCAL_DIRS Final, exported by NodeManager and non-modifiable by users.
LOG_DIRS $LOG_DIRS Final, exported by NodeManager and non-modifiable by users.
LOGNAME $LOGNAME Final, non-modifiable.
MALLOC_ARENA_MAX $MALLOC_ARENA_MAX
NM_HOST $NM_HOST Final, exported by NodeManager and non-modifiable by users.
NM_HTTP_PORT $NM_HTTP_PORT Final, exported by NodeManager and non-modifiable by users.
NM_PORT $NM_PORT Final, exported by NodeManager and non-modifiable by users.
PATH $PATH
PWD $PWD Final, non-modifiable.
SHELL $SHELL
USER $USER Final, non-modifiable.

Method Summary

Modifier and Type	Method and Description
String	$() Expand the environment variable based on client OS environment variable expansion syntax (e.g.
String	$$() Expand the environment variable in platform-agnostic syntax.
String	key()
String	toString()
static ApplicationConstants.Environment	valueOf(String name) Returns the enum constant of this type with the specified name.
static ApplicationConstants.Environment[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

USER

public static final ApplicationConstants.Environment USER

$USER Final, non-modifiable.

LOGNAME

public static final ApplicationConstants.Environment LOGNAME

$LOGNAME Final, non-modifiable.

HOME

public static final ApplicationConstants.Environment HOME

$HOME Final, non-modifiable.

PWD

public static final ApplicationConstants.Environment PWD

$PWD Final, non-modifiable.

PATH

public static final ApplicationConstants.Environment PATH

$PATH

SHELL

public static final ApplicationConstants.Environment SHELL

$SHELL

JAVA_HOME

public static final ApplicationConstants.Environment JAVA_HOME

$JAVA_HOME

CLASSPATH

public static final ApplicationConstants.Environment CLASSPATH

$CLASSPATH

APP_CLASSPATH

public static final ApplicationConstants.Environment APP_CLASSPATH

$APP_CLASSPATH

HADOOP_CLASSPATH

public static final ApplicationConstants.Environment HADOOP_CLASSPATH

$HADOOP_CLASSPATH.

LD_LIBRARY_PATH

public static final ApplicationConstants.Environment LD_LIBRARY_PATH

$LD_LIBRARY_PATH

HADOOP_CONF_DIR

public static final ApplicationConstants.Environment HADOOP_CONF_DIR

$HADOOP_CONF_DIR Final, non-modifiable.

HADOOP_COMMON_HOME

public static final ApplicationConstants.Environment HADOOP_COMMON_HOME

$HADOOP_COMMON_HOME

HADOOP_HDFS_HOME

public static final ApplicationConstants.Environment HADOOP_HDFS_HOME

$HADOOP_HDFS_HOME

MALLOC_ARENA_MAX

public static final ApplicationConstants.Environment MALLOC_ARENA_MAX

$MALLOC_ARENA_MAX

HADOOP_YARN_HOME

public static final ApplicationConstants.Environment HADOOP_YARN_HOME

$HADOOP_YARN_HOME

CLASSPATH_PREPEND_DISTCACHE

@InterfaceAudience.Private
public static final ApplicationConstants.Environment CLASSPATH_PREPEND_DISTCACHE

$CLASSPATH_PREPEND_DISTCACHE Private, Windows specific

CONTAINER_ID

public static final ApplicationConstants.Environment CONTAINER_ID

$CONTAINER_ID Final, exported by NodeManager and non-modifiable by users.

NM_HOST

public static final ApplicationConstants.Environment NM_HOST

$NM_HOST Final, exported by NodeManager and non-modifiable by users.

NM_HTTP_PORT

public static final ApplicationConstants.Environment NM_HTTP_PORT

$NM_HTTP_PORT Final, exported by NodeManager and non-modifiable by users.

NM_PORT

public static final ApplicationConstants.Environment NM_PORT

$NM_PORT Final, exported by NodeManager and non-modifiable by users.

LOCAL_DIRS

public static final ApplicationConstants.Environment LOCAL_DIRS

$LOCAL_DIRS Final, exported by NodeManager and non-modifiable by users.

LOG_DIRS

public static final ApplicationConstants.Environment LOG_DIRS

$LOG_DIRS Final, exported by NodeManager and non-modifiable by users. Comma separate list of directories that the container should use for logging.

Method Detail

values

public static ApplicationConstants.Environment[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (ApplicationConstants.Environment c : ApplicationConstants.Environment.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static ApplicationConstants.Environment valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

key

public String key()

toString

public String toString()

Overrides:

toString in class Enum<ApplicationConstants.Environment>

$

public String $()

Expand the environment variable based on client OS environment variable expansion syntax (e.g. $VAR for Linux and %VAR% for Windows).

Note: Use $$() method for cross-platform practice i.e. submit an application from a Windows client to a Linux/Unix server or vice versa.

$$

@InterfaceAudience.Public
 @InterfaceStability.Unstable
public String $$()

Expand the environment variable in platform-agnostic syntax. The parameter expansion marker "{{VAR}}" will be replaced with real parameter expansion marker ('%' for Windows and '$' for Linux) by NodeManager on container launch. For example: {{VAR}} will be replaced as $VAR on Linux, and %VAR% on Windows.