Hello Andrew,
I am sending the file using SWA (soap with attachments) and not
Inputstream; in other words, axis will access the bytes through a
datahandler (the datahandler uses a datasource to access to the stream) and
the soap header will contain an ID of the attached file. I could do what you
say by changing the code in the datasource, BUT I don't know how Axis reads
the file!!!, may be it reads it only once or twice... I don't know. a
solution that I am using right now is to have my own datahandler and I
delete the file in "finalize()" method of the datahandler object (means when
there is no more reference to the object) but this takes sometimes a lot of
time before being executed (it depends on when the garbage collector will
pass).
The exact code I am using for sending back the file is:
*****************************************************************************
File file = new File(fileAbsolutePath);
OperationContext operationContext = inMsgCtx.getOperationContext();
MessageContext outMessageContext = operationContext
.getMessageContext(WSDLConstants.MESSAGE_LABEL_OUT_VALUE);
// Create a data source for the encrypted File
FileDataSource encryptedFileDataSource = new FileDataSource(file);
// Create the dataHandler out of the above created data source
DataHandler fileDataHandler = new DataHandlerModified
(encryptedFileDataSource);
// We can add the created data handler as an attachment to the
// outgoing message. The Uniqueness of the attachment ID is guaranteed
by
outMessageContext
String attachmentID = outMessageContext.addAttachment(fileDataHandler);
********************************************************************************
attachmentID is returned in the SOAP envelope header for the client to
access the attachment
Thanks for your help
Elmouj,
Andrew Martin-7 wrote:
>
> How are you passing the file to Axis2? If you're just passing an
> InputStream, you could write your own wrapper FilterInputStream that
> erases the file in its close method or in its read methods whenever -1
> is returned.
>
> Andrew
>
> Elmouj wrote:
>> Hello Upul,
>>
>> Thanks for your reply. Actually this will work and I have already
>> thought about it; the problem I found with this solution is that the
>> deletion of the file (in the server side) is after an acknowledgment FROM
>> the client. this ACK could be easily bypassed: I mean, no one is obliging
>> people using my service to develop a client that acknowledges receipt of
>> the
>> file !!! hence making it possible for the file to reside on the server.
>> For
>> your concern about if the file is lost, this is not a problem because the
>> file the server sends to a client is an encryption of a file sent from
>> Client to Server, hence if there is any problem (which is very very very
>> rare since Axis2 over TCP is almost error free I guess), the client will
>> just re-request the encryption of his file. So, I am really looking for a
>> thing that tells me that the last byte has been sent to the client.
>>
>> Thanks again,
>>
>> Elmouj,
>>
>>
>> Upul Godage wrote:
>>> Hi,
>>>
>>> If you mean you are having a web service which provides files on
>>> request,
>>> let's say, requested by reference number, best thing to do is to have
>>> another operation in the web service. So that after client gets the
>>> payload
>>> and, let's say client has processed or saved it successfully, it will
>>> call
>>> that operation, saying 'got the payload okay for this reference number.'
>>> Otherwise even though the file is transferred successfully, there could
>>> be
>>> an exception on the client side and the file is lost from both sides.
>>>
>>> Upul
>>>
>>>
>>> On 9/5/07, Elmouj <[EMAIL PROTECTED]> wrote:
>>>>
>>>>
>>>> Hello,
>>>>
>>>> I have been using Axis2 for a month now and it's really powerful and
>>>> easy
>>>> to
>>>> use. However, the last two days I got stuck looking for a way to access
>>>> an
>>>> event triggered when the last byte of the server response is sent to
>>>> the
>>>> client; so I decided to post on this forum hoping to get a clue to this
>>>> issue :( . In other words, I want a way by which I could be informed
>>>> when
>>>> the last byte of the server's response is sent because I need to
>>>> execute
>>>> some tasks after this event has been triggered (I need to delete a file
>>>> after the client downloads it).
>>>>
>>>> Thanks in advance,
>>>>
>>>> Elmouj
>>>> --
>>>> View this message in context:
>>>> http://www.nabble.com/Axis2-events-handling-tf4383721.html#a12496874
>>>> Sent from the Axis - User mailing list archive at Nabble.com.
>>>>
>>>>
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>>>
>>
>
> --
> Andrew Martin
> Computer Programmer
> Regenstrief Institute, Inc.
> 410 West 10th Street, Suite 2000
> Indianapolis, IN 46202-3012
> Phone: (317) 423-5542
> Fax: (317) 423-5695
> [EMAIL PROTECTED]
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