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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}

h1. Service Configuration

{include:0 CDK SU Provide Configuration}

h2. Put XML content or send FTP commands to the FTP server

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"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:jbi="http://java.sun.com/xml/ns/jbi"
xmlns:petalsCDK="http://petals.ow2.org/components/extensions/version-5"
xmlns:ftp="http://petals.ow2.org/components/ftp/version-3"
xmlns:interfaceNs="http://petals.ow2.org/components/ftp/version-3"
xmlns:serviceNs="http://myservice">
<!-- Import a Service into PEtALS or Expose a PEtALS Service => use a BC. -->
<jbi:services binding-component="true">
<!-- Import a Service into PEtALS => provides a Service. -->
<jbi:provides
interface-name="interfaceNs:Ftp"
service-name="serviceNs:FtpSrv"
endpoint-name="FtpSrvEndpoint">
<!-- CDK specific elements -->
<petalsCDK:wsdl>FtpService.wsdl</petalsCDK:wsdl>
<!-- Component specific elements -->
<ftp:server>server</ftp:server>
<ftp:port>21</ftp:port>
<ftp:user>user</ftp:user>
<ftp:password>password</ftp:password>
<ftp:folder>folder</ftp:folder>
</jbi:provides>
</jbi:services>
</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 |
| connection-mode | In Active mode, the connection port is set by the client. In Passive mode, it is set by the server (default is Active) | active | No |
| transfer-type | transfer mode used for put or get files ascii/binary | ascii | No |
| delete-processed-files | If true, the service delete the files processed by operation get or mget | false | No \\ |
| encoding | Set the encoding encoding value used to process ftp operation. | Default JVM Encoding \\ | No \\ |
{table-plus}

h3. 2.1.2. Service Unit content \\

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
* *get* : get one specified file from the FTP server and return it as an XML message
* *mget* : get files from the FTP server and return them as attachments
* *del* : remove file on the FTP server

When using the FTP service, you can optionnaly define the FTP connection information in your XML request. If you don't, the service unit parameters are used.
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To configure the FTP connection in your XML message request, you have to provide a connection element.
\\ {code:lang=xml}
...
<ver:connection>
            <ver:server>?</ver:server>
            <ver:port>?</ver:port>
            <ver:user>?</ver:user>
            <ver:password>?</ver:password>
            <!--Optional:-->
            <ver:folder>?</ver:folder>
            <ver:transfer-type>ascii|binary</ver:transfer-type>
            <ver:connection-mode>active|passive (optional, default is active)</ver:connection-mode>
            <ver:delete-processed-files>true|false(optional, default is active)</ver:delete-processed-files>
            <ver:encoding>?</ver:encoding>
         </ver:connection>
{code}

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.
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The IN message looks like :
\\ {code:lang=xml}
<ver:dir>
   <!--Optional:-->
   <ver:connection>
     ...
   </ver:connection>
</ver:dir>{code}
The OUT message returned to the consumer is defined as follow :

{code:lang=xml}<tns:dirResponse xmlns:tns="http://petals.ow2.org/components/ftp/version-3.0">
         <!--Zero or more repetitions:-->
         <tns:filename>file1.txt</tns:filename>
<tns:filename>linux.jpg</tns:filename>
</tns:dirResponse>
{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 pattern is : *InOut*.
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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

...
</ver:connection>
</ver:mput>
{code}
The service does not return a message.
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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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<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

h4. 2.1.3.5. MGET operation

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

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