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h1. PEtALS-BC-FTP

The petals-bc-ftp component allows to put, get or list files on an FTP server.
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\_FTP protocol (RFC959 ) is described at: [http://www.w3.org/Protocols/rfc959/|http://www.w3.org/Protocols/rfc959/]\\
*Figure* *1. ftp component mechanism*
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h1. Component Configuration

The following attributes can be set during the installation phase to configure the component, using the params element of the jbi-install-component ANT task:


h2. Configuration of the component (CDK)

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{include:0 CDK Component Configuration Table}


{include:0 CDK Parameter scope}

PROVIDE SERVICE : Expose an external service in the JBI environment to put XML messages or send FTP commands on an FTP server.

Petals FTP binding component allows JBI consumers to send XML messages to an FTP server. A JBI endpoint is registered into the JBI environment, and is linked to an FTP server, with a configured user/password. When the FTP component receives a message exchange from Petals platform, the XML content of the message is put on the FTP server.

The component can also provide a generic *Ftp service*. This service allows the consumer to call FTP commands. This service can either connects to an FTP server configured in the ServiceUnit, or retrieve the FTP server information in the XML message request.
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To use this generic service, the consumer has to call explicitely the *\{service* \*namespace\}get/mget/put/mput/dir\* operations. Otherwise, the standard PUT operation is called.
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h3. 2.1.1. Service Unit descriptor

The service unit is configurable via its extensions in the jbi.xml file:
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{code}<?xml version="1.0" encoding="UTF-8"?>
<!-- JBI descriptor for PEtALS' "petals-bc-ftp" (FTP), version 3.0 -->
<jbi:jbi version="1.0"

<jbi:services binding-component="true">
<!-- Import a Service into PEtALS => provides a Service. -->
<jbi:provides
interface-name="interfaceNs:Ftp"
service-name="serviceNs:FtpSrv"

<ftp:port>21</ftp:port>
<ftp:user>user</ftp:user>

</jbi:jbi{code}
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*Table* *2.1. Service Unit attributes to provide services*
{table-plus}

| port | the port number of the ftp server | 21 | No |
| user | the user login name used to connect to the server | | Yes (except when using FtpService) |
| password | the user password | | Yes (except when using FtpService) |
| folder | the folder on the FTP server | | No |
| filename | file name for the standard PUT operation (write the XML message content on the FTP server) | content.xml | No |

The Service Unit has to contain the following elements, packaged in an archive:
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* The META-INF/jbi.xml descriptor file, has described above,
* An optional wsdl file describing the related service

{code}service-unit.zip
+ META-INF
    - jbi.xml (as defined above)
    - service.wsdl (optional)
{code}

h3. 2.1.3. FTP Service

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The petals-bc-ftp component provides 5 operations, when using the Ftp service:
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* *dir* : return the files list on the FTP server
* *put* : copy incoming XML message on the FTP server
* *mput* : copy incoming message attachments on the FTP server

h4. 2.1.3.1. DIR operation

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When the dir operation is set on the incoming IN message, the component returns the file names listed from the FTP
server.

   <ver:connection>
     ...
   </ver:connection>
</ver:dir>{code}
The OUT message returned to the consumer is defined as follow :

The service might return a Fault when an element in the request is missing or if the FTP connection failed

h4. 2.1.3.2. PUT operation

When the put operation is set on the incoming IN message, the component write the XML message to the FTP server.
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The IN message looks like :

{code:lang=xml}<ver:put xmlns:ver="http://petals.ow2.org/components/ftp/version-3.0">
    <ver:body>xml body</ver:body>
    <ver:filename>file name on the FTP server</ver:filename>
   <!--Optional:-->
   <ver:connection>
      ...
   </ver:connection>
</ver:put>
{code}
The service does not return a message.

The service might return a Fault when an element in the request is missing or if the FTP connection failed
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The available exchange patterns are : *InOptionalOut*, *InOnly*, *RobustInOnly*.
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h4. 2.1.3.3. MPUT operation

When the mput operation is set on the incoming IN message, the component write the attachments on the FTP server. The IN message looks like :
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[http://petals.ow2.org/components/ftp/version-3.0]

<ver:connection>
...
</ver:connection>
</ver:mput>
{code}
The service does not return a message.
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The service might return a Fault when an element in the request is missing or if the FTP connection failed

The available exchange patterns are : *InOptionalOut*, *InOnly*, *RobustInOnly*.
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h4. 2.1.3.4. GET operation

When the get operation is set on the incoming IN message, the component retrieve ONE file from the FTP server and return it as an XML message content.
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The name of the file to retrieve is set in the XML IN content of the message.
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The IN message looks like :
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[http://petals.ow2.org/components/ftp/version-3.0]

<!--Optional:-->
<ver:connection>
...
</ver:connection>
</ver:get>
{code}
The OUT message returned to the consumer is the content of the XML file
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The service might return a Fault when an element in the request is missing or if the FTP connection failed
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The available exchange patterns are : *InOptionalOut* and *InOut*.


h4. 2.1.3.5. MGET operation

When the mget operation is set on the incoming IN message, the component retrieves files from the FTP server, according to the file names (or filters) set in the XML request.
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There is no recursivity, sub folders are ignored.


Each file is set in the OUT message as an attachment. The IN message looks like :
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[http://petals.ow2.org/components/ftp/version-3.0]

<ver:filename>*.xml</ver:filename>
<ver:filename>myFile.txt</ver:filename>
<!--Optional:-->
<ver:connection>
...
</ver:connection>
</ver:mget>
{code}
The OUT message returned to the consumer contains files, as attachments, and an XML message report :
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[http://petals.ow2.org/components/ftp/version-3.0]

<tns:filename>source2.xml</tns:filename>
<tns:filename>myFile.txt</tns:filename>
</tns:mgetResponse>
{code}
The service might return a Fault when an element in the request is missing or if the FTP connection failed
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The available exchange patterns are : *InOptionalOut*, *InOut*.
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