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The Virtual File System (VFS) transport is used by WSO2 Enterprise Integrator(WSO2 EI) to process files in the specified source directory. After processing the files, it moves them to a specified location or deletes them. Note that files cannot remain in the source directory after processing or they will be processed again, so if you need to maintain these files or keep track of which files have been processed, specify the option to move them instead of deleting them after processing. If you want to move files into a database, use the VFS transport and the DBReport mediator (for an example, see Sample 271: File Processing).

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In <EI_HOME>/conf/axis2/axis2.xml, in the messageBuilders section, add the binary message builder as follows:
Code Block
language html/xml
<messageBuilder contentType="application/binary" class="org.apache.axis2.format.BinaryBuilder"/>
and in the messageFormatters section, add the binary message formatter as follows:
Code Block
language html/xml
<messageFormatter contentType="application/binary" class="org.apache.axis2.format.BinaryFormatter"/>
In the proxy service where you use the VFS transport, add the following parameter to enable streaming (see VFS service-level parameters below for more information):
Code Block
language html/xml
<parameter name="transport.vfs.Streaming">true</parameter>
In the same proxy service, before the Send mediator, add the following property:
Info
title Note
You also need to add the following property if you want to use the VFS transport to transfer files from VFS to VFS.
Code Block
language html/xml
<property name="ClientApiNonBlocking" value="true" scope="axis2" action="remove"/>
For more information, see Example 3 of the Send Mediator.

VFS service-level parameters

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Parameter Name

Description

Required

Possible Values

Default Value

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	file_URL
	file_URL

transport.vfs.FileURI

The URI of the location of your files. This should be the source location of the files (if you are configuring the ESB to read files) or the destination of the files (if you are configuring the ESB to send files). You can specify connection-level parameters on the URL (see VFS URL parameters below).

When you need to access the absolute path of the URL, you can define the URL with sftpPathFromRoot as shown below. Also, note that transport.vfs.AvoidPermissionCheck is a mandatory parameter for this URL when SFTP is used.

Code Block
<parameter name="transport.vfs.FileURI">sftp://[ username[: password]@] hostname[: port][ absolute-path]?sftpPathFromRoot=true;transport.vfs.AvoidPermissionCheck=true</parameter>

Yes

A valid file URI in the following form:
file://<path>

transport.vfs.ContentType

Content type of the files processed by the transport. To specify the encoding, follow the content type with a semi-colon and the character set. For example:

<parameter name="transport.vfs.ContentType“>text/plain;charset=UTF-32</parameter>

When writing a file, you can set a different encoding with the CHARACTER_SET_ENCODING property:

<property name="CHARACTER_SET_ENCODING" value="UTF-8" scope="axis2" type="STRING"/>

Yes

A valid content type for the files (e.g., text/xml). You can specify the encoding after the content type, such as text/plain;charset=UTF-32

transport.vfs.
FileNamePattern

If the VFS listener should process only a subset of the files available at the specified file URI location, use this parameter to select those files by name using a regular expression.

No

A regular expression to select files by name (e.g., *\.xml)

transport.
PollInterval

The polling interval for the transport receiver to poll the file URI location. The value is expressed in seconds unless you add "ms" for milliseconds, e.g., "2" or "2000ms" to specify 2 seconds.

No

A positive integer.

transport.vfs.
ActionAfterProcess

Whether to move, delete or take no action on the files after the transport has processed them.

No

MOVE, DELETE or NONE

DELETE

transport.vfs.
ActionAfterFailure

Whether to move, delete or take no action on the files if a failure occurs.

No

MOVE, DELETE or NONE

DELETE

transport.vfs.
MoveAfterProcess

Where to move the files after processing if ActionAfterProcess is MOVE.

Yes, if
ActionAfterProcess
is MOVE

A valid file URI

transport.vfs.
MoveAfterFailure

Where to move the files after processing if ActionAfterFailure is MOVE.

Yes, if
ActionAfterFailure
is MOVE

A valid file URI

transport.vfs.
ReplyFileURI

The location where reply files should be written by the transport.

No

A valid file URI

transport.vfs.
ReplyFileName

The name for reply files written by the transport.

No

A valid file name

response.xml

transport.vfs.
MoveTimestampFormat

The pattern/format of the timestamps added to file names as prefixes when moving files.

No

A valid timestamp pattern
(e.g., yyyy-MM-dd'T'HH:mm:ss.SSSZ )

transport.vfs.
Streaming

Whether files should be transferred in streaming mode, which is useful when transferring large files

No

true or false

false

transport.vfs.
ReconnectTimeout

Reconnect timeout value in seconds to be used in case of an error when transferring files

No

A positive integer

30 sec

transport.vfs.
MaxRetryCount

Maximum number of retry attempts to carry out in case of errors.

No

A positive integer

3

transport.vfs.Append

When writing the response to a file, whether the response should be appended to the response file instead of overwriting the file. This value should be defined as a query parameter in the out/reply
file URI. For example:
"vfs:file:///home/user/test/out?
transport.vfs.Append=true"

or:

<parameter name="
transport.vfs.ReplyFileURI">
file:///home/user/test/out?
transport.vfs.Append=true
</parameter>

No

true or false

false (the response file will be completely overwritten).

transport.vfs.
MoveAfterFailedMove

Where to move the failed file.

No

A valid file URI

transport.vfs.
FailedRecordsFileName

The name of the file that maintains
the list of failed files.

No

A valid file name

vfs-move-failed-records.
properties

transport.vfs.
FailedRecordsFile
Destination

Where to store the failed records file.

No

A folder URI

transport.vfs.
MoveFailedRecord
TimestampFormat

Entries in the failed records file include the name of the file that failed and the timestamp of its failure. This property configures the time stamp format.

No

A valid timestamp pattern
(e.g., yyyy-MM-dd'T'HH:mm:ss.SSSZ )

dd-MM-yyyy HH:mm:ss

transport.vfs.
FailedRecordNext
RetryDuration

The time in milliseconds to wait before retrying the move task.

No

A positive integer

3000 milliseconds

transport.vfs.Locking

By default, file locking is enabled in the VFS transport. This parameter lets you configure the locking behavior on a per service basis. You can also disable locking globally by specifying the parameter at the receiver level and selectively enable locking only for a set of services.

No

enable or disable

enable

transport.vfs.
FileProcessCount This setting allows you to throttle the VFS listener by processing files in batches. Specify the number of files you want to process in each batch. No A positive integer, such as 10 N/A

transport.vfs.
FileProcessInterval The interval in milliseconds between two file processes. No A positive integer, such as 1000 N/A

transport.vfs.ClusterAware Whether VFS coordination support is enabled in a clustered deployment or not. No true or false false

transport.vfs.FileSizeLimit

Only file sizes that are less than or equal to the defined limit are processed.

No

File size in bytes

-1(unlimited file size)

transport.vfs.AutoLockReleaseInterval

The timeout value for stale locks where the VFS transport will ignore those file locks once the defined time period is reached. (The time period is calculated from the time the lock is created to the time you attempt to access it.)

If you need stale locks to never timeout provide -1 as the timeout value.

No

Time in milliseconds

20000

transport.vfs.SFTPIdentities Location of the private key No A valid file path N/A

transport.vfs.SFTPIdentityPassPhrase Passphrase of the private key No A valid passphrase N/A

transport.vfs.SFTPUserDirIsRoot If the SFTP user directory should be treated as root No true or false true

transport.vfs.ResolveHostsDynamically

Whether hostnames should be resolved at the time of deployment or whether it is necessary to resolve hostnames dynamically at runtime. By default hostnames are resolved at the time of deployment. If you want to resolve hostnames at runtime, set this parameter to true.

Note

title	Note

Reolving hostnames at runtime is only possible for the Server Message Block (SMB) protocol.

No

true or false

false

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Following are details on the URL parameters you can set. To configure the proxy over ftp/sftp click here.

Parameter Name

Description

Possible Values

Default Value

Anchor

	avoid_permissions
	avoid_permissions

transport.vfs.AvoidPermissionCheck

Be sure to set this parameter to true for an SFTP connection. This is because (by default) the VFS transport checks whether the user has permission to access the location of the files (the source location or the destination). However, since the system is reading files in an external server through the SFTP connection, this permission check is not required and should be avoided.

true | false

vfs.passive

Enable FTP passive mode. This is required when the FTP client and server are not in the same network.

true | false

false

transport. vfs . Append

If file with same name exists, this parameter tells whether to create a new file and write content or append content to existing file

true | false

false

vfs.protection

Set data channel protection level using FTP PROT command

C - Clear
S - Safe(SSL protocol only)
E - Confidential(SSL protocol only)
P - Private

C

vfs.ssl.keystore Private key store to use for mutual SSL. Your keystore must be signed by a certificate authority. For more information, see http://docs.oracle.com/cd/E19509-01/820-3503/ggfen/index.html. String - Path of keystore

vfs.ssl.kspassword Private key store password String

vfs.ssl.keypassword Private key password String

vfs.ssl.truststore Trust store to use for SFTP String - Path of keystore

vfs.ssl.tspassword Trust store password String

transport.vfs.CreateFolder If the directory does not exists create and write the file true | false false

transport. vfs.SendFileSynchronously Whether to send files synchronously to the file host. When this parameter is set to true, files will be sent one after another to the file host. This synchronous write can be configured on a per host basis. true | false false

transport.vfs.Locking When concurrent write requests are there, if this property is enabled, requests are witten in sequential maaner. enable | disable enable

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Versions Compared

Old Version 1

New Version 2

Key

VFS service-level parameters