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Petals-BC-FTP

PEtALS-BC-FTP

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

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:

Configuration of the component (CDK)


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Configuration of a Service Unit to consume a service (CDK)

Configuration of a Service Unit to consume a service (JBI)

Parameter Description Default Required
consumes Refer JBI service to invoke into the JBI bus.
You can define an explicit endpoint: interface (QName) / Service (QName) / Endpoint (String) attributes.
Or define implicit endpoint, to let the container routing according to QOS configurations (HA...):
-by Interface attribute (QName)
-by Service attribute (QName) 		- Yes


Configuration of a Service Unit to consume a service (CDK)

Parameter Description Default Required
mep Message exchange pattern abbreviation. This parameter can be used in conjunction with the method of the CDK Listeners: createMessageExchange(Extensions extensions).
This method returns a CDK Exchange corresponding to the type of the specified pattern. 		- Yes
operation Operation to call on a service. This parameter can be used in conjunction with the sending methods of the Listeners. If no operation is specified in the Message Exchange to send, this parameter will be used. - No
timeout Timeout in milliseconds of a synchronous send. This parameter can be used in conjunction with the sendSync(Exchange exchange) method of the Listeners. Set 0 for an infinite timeout. 30000 No

Service Configuration

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.
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.

2.1.1. Service Unit descriptor

The service unit is configurable via its extensions in the jbi.xml file: 

<?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:ftp="http://petals.ow2.org/components/ftp/version-3.0"
xmlns:petalsCDK="http://petals.ow2.org/components/extensions/version-4.0"
xmlns:interfaceNs="http://petals.ow2.org/components/ftp/version-3.0"
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>ftp.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>
    <ftp:filename>file.xml</ftp:filename>
  </jbi:provides>
</jbi:services>
</jbi:jbi


Table 2.1. Service Unit attributes to provide services

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

Table *2.2. Configuration of a Service Unit to provide a service (CDK)

Parameter
Description
Default value
Required
wsdl-imports- download If false, the external imports declared in the service WSDL won't be downloaded, so they won't be replaced by their content. True No
wsdl Path to the WSDL document describing services and operations exposed by the provided JBI endpoints defined in the SU.
The value of this parameter is :
• an URL
• a file relative to the root of the SU package
If not specified, a basic WSDL description is automaticaly provided by the CDK.
No
timeout Timeout in milliseconds of a synchronous send. this parameter can be used in conjunction with the sendSync(Exchange exchange) method of the Listeners. Set 0 for an infinite timeout.   No
Parameter Description Default value Required
wsdl-imports- download If false, the external imports declared in the service WSDL won't be downloaded, so they won't be replaced by their content. True No
wsdl Path to the WSDL document describing services and operations exposed by the provided JBI endpoints defined in the SU.
The value of this parameter is :
• an URL
• a file relative to the root of the SU package
If not specified, a basic WSDL description is automaticaly provided by the CDK.
No
timeout Timeout in milliseconds of a synchronous send. this parameter can be used in conjunction with the sendSync(Exchange exchange) method of the Listeners. Set 0 for an infinite timeout. No
org.ow2.petals.messaging.provider.coa Check Petals container document for further details. This propety activates the bypass of acknowledgment messages destinated to this SU.

2.1.2. Service Unit content

The Service Unit has to contain the following elements, packaged in an archive:

  • The META-INF/jbi.xml descriptor file, has described above,
  • An optional wsdl file describing the related service
service-unit.zip
+ META-INF
    - jbi.xml (as defined above)
    - service.wsdl (optional)

2.1.3. FTP Service


The petals-bc-ftp component provides 5 operations, when using the Ftp service:

  • 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

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.
To configure the FTP connection in your XML message request, you have to provide a connection element. 

...
    <ver:connection>
       <ver:server>server</ver:server>
       <ver:port>port</ver:port>
       <ver:user>user</ver:user>
       <ver:password>password</ver:password>
       <ver:folder>folder (optional)</ver:folder>
       <ver:connection-mode>active|passive (optional, default is active)</ver:connection-mode>
       <ver:transfer-type>ascii|binary|auto (optional, default is auto)</ver:connection-mode>
    </ver:connection>

2.1.3.1. 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 : 

<ver:dir>
   <!--Optional:-->
   <ver:connection>
     ...
   </ver:connection>
</ver:dir>

The OUT message returned to the consumer is defined as follow :

<tns:dirResponse xmlns:tns="http://petals.ow2.org/components/ftp/version-3.0">
         <tns:filename>source.xml</tns:filename>
         <tns:filename>test.xml</tns:filename>
</tns:dirResponse>

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.

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.

The IN message looks like :

<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>

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

The available exchange patterns are : InOptionalOut, InOnly, RobustInOnly.

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 :
http://petals.ow2.org/components/ftp/version-3.0

<ver:mput xmlns:ver="http://petals.ow2.org/components/ftp/version-3.0">
     <!--Optional:-->
   <ver:connection>
     ...
   </ver:connection>
</ver:mput>

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

The available exchange patterns are : InOptionalOut, InOnly, RobustInOnly.


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.

The name of the file to retrieve is set in the XML IN content of the message.

The IN message looks like :
http://petals.ow2.org/components/ftp/version-3.0

<ver:get xmlns:ver="http://petals.ow2.org/components/ftp/version-3.0">
     <ver:filename>file name to retrieve</ver:filename>
    <!--Optional:-->
    <ver:connection>
      ...
    </ver:connection>
 </ver:get>

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 are : InOptionalOut and InOut.

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.

There is no recursivity, sub folders are ignored.

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

<ver:mget xmlns:ver="http://petals.ow2.org/components/ftp/version-3.0">
    <!--1 or more repetitions:-->
    <ver:filename>*.xml</ver:filename>
    <ver:filename>myFile.txt</ver:filename>
   <!--Optional:-->
   <ver:connection>
     ...
   </ver:connection>
</ver:mget>

The OUT message returned to the consumer contains files, as attachments, and an XML message report :
http://petals.ow2.org/components/ftp/version-3.0

<tns:mgetResponse xmlns:tns="http://petals.ow2.org/components/ftp/version-3.0">
         <tns:filename>source.xml</tns:filename>
         <tns:filename>source2.xml</tns:filename>
         <tns:filename>myFile.txt</tns:filename>
</tns:mgetResponse>

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, InOut.
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