Thaks a lot Alex
Is it possible that you provide an example code because I have already
tried to write a custom DataSource class and it is not working as I
expected
below is the code
public javax.activation.DataHandler[] returnStreamingByteArray(final int
timeout) {
DataHandler ret = new DataHandler(new DataSource() {
private long start = System.currentTimeMillis();
private long end = start + timeout;
public String getContentType() {
return "text/plain";
}
public InputStream getInputStream() throws IOException {
return new InputStream() {
public int read() throws IOException {
try {
Thread.sleep(10);
} catch (InterruptedException e) {
//ignore this exception
}
if (System.currentTimeMillis() > end) {
return -1;
} else {
return (int)(Math.random() * 256);
}
}
};
}
public String getName() {
return "";
}
public OutputStream getOutputStream() throws IOException {
return null;
}
});
return new DataHandler[]{ret};
}
-----Original Message-----
From: Alex Dickinson [mailto:[EMAIL PROTECTED]
Sent: Wednesday, July 04, 2007 10:07 PM
To: [email protected]
Subject: Re: Streaming Soap with Attachments
The delay is due to the default behaviour of writeObject() in
javax.activation.DataHandler. The stream that gets passed to it is
buffered, which will have to fill up before the bytes are sent over the
socket's stream.
Also the ByteArrayDataSource requires that the DataSource be fully
written to before it can be read from.
I had to do something similar. I had small amounts of data that had to
be sent over a long period of time. I ended up having to write a custom
DataSource that made data available to the InputStream as soon as it was
available, and to implement a custom DataHandler to would flush the
output in writeObject when ever it wrote data.
Hope that helps,
Alex
Davanum Srinivas wrote:
> Axis1 or Axis2? Can you post some code of what you tried?
>
> thanks,
> dims
>
> On 7/4/07, Peter Makoi <[EMAIL PROTECTED]> wrote:
>>
>>
>>
>>
>> Does soap with attachments using MIME multipart support streaming?
>>
>> I have goggled around trying to find out if there is a possibility of
>> doing
>> that but i end up getting some old postings and documentations that
>> suggest
>> that SwA does not support streaming
>>
>> I have also tried to simulate streaming a considerably large amount
of
>> data
>> by sending it as a data handler and then use the streaming capability
>> of the
>> activation framework to stream the data into an output stream
>>
>> But what I got is an overhead equivalent to the time spend to
transmit
>> the
>> whole file to the client before the streaming begins(my conclusion
was
>> that
>> the data is received in a one-go and because of it's large size it
take's
>> the processor sometime to allocate some memory space to save it
before
>> the
>> streaming even begins).... Does anyone have any explanation? Thanks
in
>> advance
>
>
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