Re: [xmlblaster] is there an example showing how to send an XML document via pub/sub system?
Gautam Thaker schrieb:
Marcel Ruff wrote:
Hi Gautam,
an XML is a byte[]. If you do a
byte[] bytes = ...
try {
String xml = new String(bytes, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
you have assumed it is UTF-8 encoded (which is the xml default and is
advisable).
But usually you shouldn't do that.
If you use a xml parser for the XML InputStream (from byte[])
it correctly detects the encoding of the xml by looking at the XML
header
To summarize: A byte[] is a perfect transport medium for xml,
Hi Marcel:
Many thanks for this clarification. Makes sense. However, this brings
me to another (possibly very naive) question. *IF* one is passing
around byte [] as message contents, what would be criteria that might
make one decide if the protocol to be used should be socket, or
xmlrpc, or CORBA, or RMI? Are firewall/security considerations the
primary drivers or is it something else?
The protocol choosen is independend of the message content.
Just use SOCKET (with or without SSL) all the time.
In some cases, you may want to choose XML-RPC because of firewall issues.
If you want to integrate a client written in another language (like Ada,
Ruby) you can choose the protocol
which is most easy to implement for your client,
Marcel
Thanks.
Gautam
Marcel
Gautam Thaker schrieb:
Hi:
I am learning more about xmlBlaster by trying various demo programs
and running small variations there off. I have run most of the
"HelloWorldx.java" pgms and a few others. What I have found so far
is that in all cases the content of the user information being sent
is a byte array. The key and qos info are in XML, but the user
payload is byte array. What I wish to do is to have my payload be a
large XML document. (The receiver would have a schema against which
it may check for validity before accepting/processing the message.)
Is there an example that shows how this is done? Or is it that in
all cases the message content is byte array and all XML documents
are simply byte arrays any way? (I am not an XML guru myself, sorry
if this is a naive question over all.)
Gautam
--
Marcel Ruff
http://www.xmlBlaster.org
http://watchee.net
Phone: +49 7551 309371
Re: [xmlblaster] is there an example showing how to send an XML document via pub/sub system?
Marcel Ruff wrote:
Hi Gautam,
an XML is a byte[]. If you do a
byte[] bytes = ...
try {
String xml = new String(bytes, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
you have assumed it is UTF-8 encoded (which is the xml default and is
advisable).
But usually you shouldn't do that.
If you use a xml parser for the XML InputStream (from byte[])
it correctly detects the encoding of the xml by looking at the XML header
To summarize: A byte[] is a perfect transport medium for xml,
Hi Marcel:
Many thanks for this clarification. Makes sense. However, this brings me to another (possibly very naive) question. *IF*
one is passing around byte [] as message contents, what would be criteria that might make one decide if the protocol to
be used should be socket, or xmlrpc, or CORBA, or RMI? Are firewall/security considerations the primary drivers or is it
something else?
Thanks.
Gautam
Marcel
Gautam Thaker schrieb:
Hi:
I am learning more about xmlBlaster by trying various demo programs
and running small variations there off. I have run most of the
"HelloWorldx.java" pgms and a few others. What I have found so far is
that in all cases the content of the user information being sent is a
byte array. The key and qos info are in XML, but the user payload is
byte array. What I wish to do is to have my payload be a large XML
document. (The receiver would have a schema against which it may check
for validity before accepting/processing the message.)
Is there an example that shows how this is done? Or is it that in all
cases the message content is byte array and all XML documents are
simply byte arrays any way? (I am not an XML guru myself, sorry if
this is a naive question over all.)
Gautam
Re: [xmlblaster] is there an example showing how to send an XML document via pub/sub system?
Hi Gautam,
an XML is a byte[]. If you do a
byte[] bytes = ...
try {
String xml = new String(bytes, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
you have assumed it is UTF-8 encoded (which is the xml default and is
advisable).
But usually you shouldn't do that.
If you use a xml parser for the XML InputStream (from byte[])
it correctly detects the encoding of the xml by looking at the XML header
To summarize: A byte[] is a perfect transport medium for xml,
Marcel
Gautam Thaker schrieb:
Hi:
I am learning more about xmlBlaster by trying various demo programs
and running small variations there off. I have run most of the
"HelloWorldx.java" pgms and a few others. What I have found so far is
that in all cases the content of the user information being sent is a
byte array. The key and qos info are in XML, but the user payload is
byte array. What I wish to do is to have my payload be a large XML
document. (The receiver would have a schema against which it may check
for validity before accepting/processing the message.)
Is there an example that shows how this is done? Or is it that in all
cases the message content is byte array and all XML documents are
simply byte arrays any way? (I am not an XML guru myself, sorry if
this is a naive question over all.)
Gautam
--
Marcel Ruff
http://www.xmlBlaster.org
http://watchee.net
Phone: +49 7551 309371
[xmlblaster] is there an example showing how to send an XML document via pub/sub system?
Hi: I am learning more about xmlBlaster by trying various demo programs and running small variations there off. I have run most of the "HelloWorldx.java" pgms and a few others. What I have found so far is that in all cases the content of the user information being sent is a byte array. The key and qos info are in XML, but the user payload is byte array. What I wish to do is to have my payload be a large XML document. (The receiver would have a schema against which it may check for validity before accepting/processing the message.) Is there an example that shows how this is done? Or is it that in all cases the message content is byte array and all XML documents are simply byte arrays any way? (I am not an XML guru myself, sorry if this is a naive question over all.) Gautam
