hdfsConnection (Variable type)

ONLINE HELP
WINDEV, WEBDEV AND WINDEV MOBILE

Version:

Home | Sign in | English

This content has been translated automatically. Click here to view the French version.

Help / WLanguage / Managing databases / Big Data / HDFS system

Properties specific to hdfsConnection variables
WLanguage functions that use the hdfsConnection type

WINDEV

WEBDEV

WINDEV Mobile

Others

See also

hdfsConnection (Variable type)

In french: hdfsConnexion

The hdfsConnection type is used to define the advanced characteristics of a connection to the Hadoop file system (HDFS). You can define and change the characteristics of this connection using different WLanguage properties.

Note: For more details on the declaration of this type of variable and the use of WLanguage properties, see Declaring a variable.

Example

// Connection
MyConnection is hdfsConnection
MyConnection.namenode = "MyServer"
MyConnection.User = "Admin"
IF hdfsOpenConnection(MyConnection) = False THEN
Error(ErrorInfo())
END

Properties

Properties specific to hdfsConnection variables

The following properties can be used to handle a connection:

Property name	Type used	Effect

namenode	Character string	DNS name or IP address of "Name Node" (server) of Hadoop cluster.
User	Character string	Username.

Note: These properties can be used using one of two syntaxes:

Remarks

WLanguage functions that use the hdfsConnection type

Standard syntax:


hdfsCloseConnection	Closes a connection to a Hadoop server.
hdfsCopyFrom	Copies a file found on a Hadoop server to the local computer.
hdfsCopyTo	Copies a file located on the local machine to a Hadoop server.
hdfsCreateDirectory	Creates a directory on a Hadoop server.
hdfsDelete	Deletes a file or directory from a Hadoop server.
hdfsList	Lists the content of a directory found on a Hadoop server.
hdfsOpenConnection	Opens a connection to a Hadoop server.
hdfsRename	Renames a file or a directory found on a Hadoop server.

prefix syntax:


<hdfsConnection variable>.CloseConnection	Closes a connection to a Hadoop server.
<hdfsConnection variable>.CopyFrom	Copies a file found on a Hadoop server to the local computer.
<hdfsConnection variable>.CopyTo	Copies a file located on the local machine to a Hadoop server.
<hdfsConnection variable>.CreateDirectory	Creates a directory on a Hadoop server.
<hdfsConnection variable>.Delete	Deletes a file or directory from a Hadoop server.
<hdfsConnection variable>.List	Lists the content of a directory found on a Hadoop server.
<hdfsConnection variable>.OpenConnection	Opens a connection to a Hadoop server.
<hdfsConnection variable>.Rename	Renames a file or a directory found on a Hadoop server.