Attachment Blues

[Tom Ziemer <t....@dkfz-heidelberg.de>]

Hi everybody!

I've got another question about attachments:

I finally figured out how to send an attachment to my client, by
a) looking at the archive of the list,
b) googling and
c) reading the axis user guide

So this is what i came up with eventually (in case somebody is having 
the same problem):

/**
* Webservice that exports data and sends the result
* back to the client (as an attachment)
*/
public String export()
{
// gather data
Object[][] data = this.manager.extractData(new Integer(id));
this.manager.convert(data, "ws_export");

// get the message context
org.apache.axis.MessageContext msgContext = 
org.apache.axis.MessageContext.getCurrentContext();

org.apache.axis.Message rspMsg= msgContext.getResponseMessage(); 
rspMsg.getAttachmentsImpl().setSendType(org.apache.axis.attachments.Attachments.SEND_TYPE_DIME);

// add the file i just generated
java.io.File fileToAddAsAttachment = new java.io.File("/tmp/ws_export.xls");

javax.activation.DataHandler dh =
new javax.activation.DataHandler(new 
javax.activation.FileDataSource(fileToAddAsAttachment));

org.apache.axis.attachments.AttachmentPart part =
new org.apache.axis.attachments.AttachmentPart(dh);

rspMsg.addAttachmentPart(part);

logger.info("Attachment Size: "+rspMsg.countAttachments());
logger.info("Sending message: "+msg);

return msg;
}

Now, it's pretty easy to access this attachment on the client side by:
XlsExportServiceLocator locator = new XlsExportServiceLocator();
MessageContext mx = locator.getCall().getMessageContext();

Then I can iterate over the attachments and process them - great! The 
only problem is: the String (msg) returned by the service is null. When 
I remove the attachment-stuff from my service, everything is working 
nicely, though.

So, my question is: What am I doing wrong now?

Thanks,

Tom

Re: Attachment Blues [RESOLVED]

[Tom Ziemer <t....@dkfz-heidelberg.de>]

I fixed it. It was a stupid mistake on the client side, but I'd still 
like to know, whether I am doing it the "right way".

Thanks,

Tom

Tom Ziemer wrote:
> Hi everybody!
> 
> I've got another question about attachments:
> 
> I finally figured out how to send an attachment to my client, by
> a) looking at the archive of the list,
> b) googling and
> c) reading the axis user guide
> 
> So this is what i came up with eventually (in case somebody is having 
> the same problem):
> 
> /**
> * Webservice that exports data and sends the result
> * back to the client (as an attachment)
> */
> public String export()
> {
> // gather data
> Object[][] data = this.manager.extractData(new Integer(id));
> this.manager.convert(data, "ws_export");
> 
> // get the message context
> org.apache.axis.MessageContext msgContext = 
> org.apache.axis.MessageContext.getCurrentContext();
> 
> org.apache.axis.Message rspMsg= msgContext.getResponseMessage(); 
> rspMsg.getAttachmentsImpl().setSendType(org.apache.axis.attachments.Attachments.SEND_TYPE_DIME); 
> 
> 
> // add the file i just generated
> java.io.File fileToAddAsAttachment = new 
> java.io.File("/tmp/ws_export.xls");
> 
> javax.activation.DataHandler dh =
> new javax.activation.DataHandler(new 
> javax.activation.FileDataSource(fileToAddAsAttachment));
> 
> org.apache.axis.attachments.AttachmentPart part =
> new org.apache.axis.attachments.AttachmentPart(dh);
> 
> rspMsg.addAttachmentPart(part);
> 
> logger.info("Attachment Size: "+rspMsg.countAttachments());
> logger.info("Sending message: "+msg);
> 
> return msg;
> }
> 
> Now, it's pretty easy to access this attachment on the client side by:
> XlsExportServiceLocator locator = new XlsExportServiceLocator();
> MessageContext mx = locator.getCall().getMessageContext();
> 
> Then I can iterate over the attachments and process them - great! The 
> only problem is: the String (msg) returned by the service is null. When 
> I remove the attachment-stuff from my service, everything is working 
> nicely, though.
> 
> So, my question is: What am I doing wrong now?
> 
> Thanks,
> 
> Tom