I did this by creating my own DataSource object too. Maybe if there is
a ByteArrayDataSource I didn't need to! On the other hand, coding a DS
of your own would help if you had a really big data set.... because
you might be able to avoid holding it all in memory at once.
public class MyDataSource implements javax.activation.DataSource {
public String getContentType() {
return "image/jpeg";
}
public InputStream getInputStream() throws IOException {
ByteArrayInputStream bais = new
ByteArrayInputStream(data);
return bais;
}
public String getName() {
return "test.jpg";
}
public OutputStream getOutputStream() throws IOException {
throw new UnsupportedOperationException();
}
}
On 9/29/06, Betsy Frey <[EMAIL PROTECTED]> wrote:
One does not have to use an ImageDataSource or FileDataSource. You can code
your own DataSource, implementing javax.activation.DataSource.
When receiving MTOM data, one gets a DataHandler from the OMText element, and
one can get the input stream from that:
OMText data = (OMText) child.getFirstOMChild();
DataHandler dh = (DataHandler) data.getDataHandler();
InputStream istream = dh.getDataSource().getInputStream();
An intermediate file may still be created. This is because, when transferring
binary data using MTOM, there is the issue that a very large amount of data
could cause an OutOfMemoryError, without storing it on disk as it is being
received. One controls this by these configuration settings:
<parameter name="cacheAttachments" locked="false">true</parameter>
<parameter name="attachmentDIR" locked="false">temp directory</parameter>
<parameter name="sizeThreshold" locked="false">4000</parameter>
Betsy
________________________________________
From: scott ken [mailto:[EMAIL PROTECTED]
Sent: Thursday, September 28, 2006 7:53 PM
To: [email protected]
Subject: Re: about Axis2's binary attachment
Usually we will have an InputStream object. But I didn't make it work. I tried
using a byte array as input.
you can easily convert an InputStream to a byte array. After that, use
ByteArrayDataSource.
// Build OMText to hold binary data
byte[] binaryBytes = ...;
ByteArrayDataSource dataSource = new ByteArrayDataSource(binaryBytes );
DataHandler expectedDH = new DataHandler(dataSource);
OMText textData = omFactory.createOMText(expectedDH, true);
On 9/28/06, sam wang <[EMAIL PROTECTED]> wrote:
Hi, there,
I have a question about transferring binary attachment through Axis2. I want to
transfer binary
attachment from server side to client side. My question is that if I can attach
any kind of binary
data? from Axis2's api, I see there are only two datasource: file and image.
theoritically, Axis2
can transfer any kind of object because we can first serialize any object to
disk, save it as a
file, and then construct file datasource to attach into soap as binary
attachment. but it will not
be efficient. so my question is that if there is a way to attach the object
(for example,
CachedRowSet) to soap directly and return to client, instead of saving as file
first. if it can,
could anyone give me a java snippet?
thank you very much!
Sam
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