hdfsConnection (Type of variable)

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

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hdfsConnection (Type of variable)

In french: hdfsConnexion

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

Remark: 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

Remarks

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.

Remark: These properties can be handled by using one of the following syntaxes:

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.