Petals-BC-FTP

Version 33 by Mathieu Carrolle
on Apr 20, 2010 16:44.

<< Changes from 32 to 33

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Version 34 by Mathieu Carrolle
on Apr 20, 2010 17:04.

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h1. PEtALS-BC-FTP

The petals-bc-ftp component allows to put, get,list or delete files on an FTP server.
\\
\_FTP protocol (RFC959 ) is described at: [http://www.w3.org/Protocols/rfc959/|http://www.w3.org/Protocols/rfc959/]\\
*Figure* *1. ftp component mechanism*
\\ !worddav00e048e80e16a1127d043d3aa5a941a5.png|height=216,width=511!\\

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)

\\
{include:0 CDK Component Configuration Table}

{include:0 CDK Parameter scope}

h1. Service Configuration

{include:0 CDK SU Provide Configuration}

h2. PROVIDE SERVICE : Expose an external service in the JBI environment to send FTP commands on an FTP server

Petals FTP binding component allows JBI consumers to call FTP command. A JBI endpoint is registered into the JBI environment, and is linked to an FTP server, with a configured user/password.To use this service, the consumer has to call explicitely the *{service* *namespace{*}*}get/mget/put/mput/dir/del* operations.When the FTP component receives a message exchange from Petals platform, it call the FTP command associate with the jbi operation.

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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\\

h3. Service Unit descriptor

The service unit is configurable via its extensions in the jbi.xml file:
\\
{code:lang=xml}<?xml version="1.0" encoding="UTF-8"?>

<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">

<jbi:services binding-component="true">

<jbi:provides
interface-name="interfaceNs:Ftp"
service-name="serviceNs:FtpSrv"
endpoint-name="FtpSrvEndpoint">

<petalsCDK:wsdl>FtpService.wsdl</petalsCDK:wsdl>

<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}
\\
  *Service Unit attributes to provide services*
{table-plus}

|| Attribute || Description || Default value || Required ||
| server | IP or DNS name of the server | | Yes (except when uins FtpService) |

...

| 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. 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. FTP Service

\\
The petals-bc-ftp component provides 5 operations, when using the Ftp service:
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* *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
* *dir* : return the files list on the FTP server
* *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>
            
            <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. PUT operation

When the put operation is set on the incoming IN message, the component write the XML message to the FTP server.
\\

The IN message looks like :

{code:lang=xml}<?xml version="1.0" encoding="UTF-8"?>
<ver:put xmlns:ver="http://petals.ow2.org/components/ftp/version-3">
    <ver:body>xml body</ver:body>
    <ver:filename>file name on the FTP server</ver:filename>
   
   <ver:connection>
      ...
   </ver:connection>
</ver:put>
{code}

The service does not return a message.

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

The available exchange pattern is : *InOnly*.

...

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

The available exchange pattern is : *InOut*. *InOnly*.

...

h4. 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.
\\

The IN message looks like :
\\
{code:lang=xml}<?xml version="1.0" encoding="UTF-8"?>
<ver:get xmlns:ver="http://petals.ow2.org/components/ftp/version-3">
<ver:filename>file name to retrieve</ver:filename>

<ver:connection>
...
</ver:connection>
</ver:get>
{code}
The OUT message returned to the consumer is the content of the XML file
\\

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

The available exchange patterns is : *InOut*.

h4. 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 :
\\
{code:lang=xml}<?xml version="1.0" encoding="UTF-8"?>
<ver:mget xmlns:ver="http://petals.ow2.org/components/ftp/version-3">

<ver:filename>*.xml</ver:filename>
<ver:filename>myFile.txt</ver:filename>

<ver:connection>
...
</ver:connection>
</ver:mget>
{code}
The OUT message returned to the consumer contains files, as attachments, and an XML message report :
\\
{code:lang=xml}<?xml version="1.0" encoding="UTF-8"?>
<tns:mgetResponse xmlns:tns="http://petals.ow2.org/components/ftp/version-3">
<tns:attachments>
<tns:filename><xop:Include xmlns:xop="http://www.w3.org/2004/08/xop/include" href="cid:test1.xml"/></tns:filename>
<tns:filename><xop:Include xmlns:xop="http://www.w3.org/2004/08/xop/include" href="cid:test2.xml"/></tns:filename>
</tns:attachments>
</tns:mgetResponse>
{code}
The service might return a Fault when an element in the request is missing or if the FTP connection failed
\\

The available exchange pattern is : *InOut*.

h4. DIR operation

When the dir operation is set on the incoming IN message, the component returns the file names listed from the FTP
server.
The IN message looks like :{code:lang=xml}
<?xml version="1.0" encoding="UTF-8"?><ver:dir xmlns:ver="http://petals.ow2.org/components/ftp/version-3>

   <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">
         
         <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

The available exchange pattern is : *InOut*.

h4. DEL operation

When the del operation is set on the incoming IN message, the component delete the remote file.
The IN message looks like :
{code:lang=xml}
<?xml version="1.0" encoding="UTF-8"?><ver:del xmlns:ver="http://petals.ow2.org/components/ftp/version-3>
<ver:filename>?</ver:filename>

<ver:connection>
...
</ver:connection>
</ver:del>
{code}
The service does not return a message.
The service might return an Error when an element in the request is missing or if the FTP connection failed.
The available exchange pattern is : InOnly.
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Wiki

All versions of Petals ESB

Helpful links

Petals-BC-FTP

Changes (5)