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Posted to java-user@axis.apache.org by ai...@gmx.de on 2005/08/15 15:00:40 UTC
[Axis2] AW: general XML parsing performance considerations for small packets liek UDP [Re: [Axis2] AW: AW: AXIOM-SOAP-Problem
Hi Aleksander,
> you could readly directly byte array using specialized UTF8 (streaming)
> reader and that may affect performance tests - XML paser will be only as
> good as quality of input stream y ou give to it.
Do you mean something like the following??
---
// Copy the data from udp packet
byte[] data = packet.getData();
// Build UTF8-ByteStream (not optimized)
ByteArrayInputStream bais = new ByteArrayInputStream(data);
InputStreamReader isr = null;
try {
isr = new InputStreamReader(new BufferedInputStream(bais, 8192),
"UTF8");
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
}
// Init. XMLInputFactory instance
if (xmlif == null) {
initXMLInputFactory();
}
// Build SOAPModel && extract SOAPEnvelope
XMLStreamReader xmlr = null;
try {
xmlr = xmlif.createXMLStreamReader(isr);
StAXBuilder builder = new StAXSOAPModelBuilder(xmlr);
SOAPEnvelope envelope = (SOAPEnvelope) builder.getDocumentElement();
...
---
Unfortunately, I still receive a java.lang.ExceptionInInitializerError when
using 'StAXSOAPModelBuilder(xmlr)'.
Anyway, thanks a lot for your advice!
Chris
-----Ursprüngliche Nachricht-----
Von: Aleksander Slominski [mailto:aslom@cs.indiana.edu]
Gesendet: Montag, 15. August 2005 12:48
An: axis-user@ws.apache.org
Betreff: [Axis2] general XML parsing performance considerations for small
packets liek UDP [Re: [Axis2] AW: AW: AXIOM-SOAP-Problem
aii@gmx.de wrote:
>Hi Eran,
>
>Thanks a lot for answering.
>
>
>
>>If you create a String from the incoming stream and then creating another
>>stream is not that good as this will not minimize memory usage. Better try
>>to wrap the incoming TCP stream with XMLStreamReader.
>>
>>
>
>That's clear if you use TCP as transport mechanism. But I'd like to
>integrate a Transport Sender and Transport Listener for UDP. Therefore I
>receive only UDP packets (DatagramPacket), not a stream:
>
># DatagramPacket packet;
># ...
># // Copy the soap data from udp packet
># byte[] buffer = packet.getData();
>
>After storing the SOAP data in a byte-array (buffer), the SOAP envelope
must
>be extracted to complete the Message Context. Then we are able to call the
>Axis engine:
>
># SOAPEnvelope envelope;
># ...
># msgContext.setEnvelope(envelope);
># if (envelope.getBody().hasFault()) {
># engine.receiveFault(msgContext);
># }
># else {
># engine.receive(msgContext);
># }
>
>Does it make more sense to use SAX (like in Axis 1.*) instead of StAX to
>construct the SOAP Envelope if the incoming SOAP messages aren't streams??
>
as UDP messages are very small it will not make much of difference as
any goo parser will stream input in chunk and i would expect a sizeof
chunk to be bigger than UDP packet so it should be only one read
operation between parser and input.
>I
>would like to compare the performance of both variants.
>
in general there is no reason for performance difference between SAX and
StAX APIs - optimized implementations will have very similiar performance.
so what you comapre is just implementations of XML parsers and that has
little to do with SOAP
>For this purpose the
>byte-array must be converted into a stream, for example:
>
>
you could readly directly byte array using specialized UTF8 (streaming)
reader and that may affect performance tests - XML paser will be only as
good as quality of input stream y ou give to it.
HTH.
best,
alek
># // Convert SOAP-bytes to stream, build SOAPModel && extract SOAPEnvelope
># XMLInputFactory xmlif;
># ...
># XMLStreamReader xmlr = xmlif.createXMLStreamReader(new StringReader(
># new String(data)));
># StAXBuilder builder = new StAXSOAPModelBuilder(xmlr);
># SOAPEnvelope envelope = (SOAPEnvelope) builder.getDocumentElement();
>
>
>
>>If you can send me the SOAP message as a String which you have, I can test
>>it with StAXSOAPModelBuilder.
>>
>>
>
>I tried many different SOAP messages, also your one from
>http://www.jaxmag.com/itr/magazine/downloads/jaxmag/chinthaka_axiom.zip
>(soapmessage.xml).
>But I always get the exception listed below.
>
>I list my simple test code here. Maybe you or anyone see my fault.
>
># private StAXSOAPModelBuilder getSOAPBuilder(String fileName) {
># StAXSOAPModelBuilder builder = null;
># try {
># FileReader soapFileReader = new FileReader(fileName);
># XMLStreamReader parser = XMLInputFactory.newInstance()
># .createXMLStreamReader(soapFileReader);
># //builder = new StAXSOAPModelBuilder(parser); // exception
>here
># builder = OMXMLBuilderFactory
># .createStAXSOAPModelBuilder(OMAbstractFactory
># .getSOAP12Factory(), parser); // exception here
># } catch (XMLStreamException e) {
># e.printStackTrace();
># } catch (FileNotFoundException e) {
># e.printStackTrace();
># }
># return builder;
>#}
>
>
>Thanks!!
>Chris
>
>
>
>-----Ursprüngliche Nachricht-----
>Von: Eran Chinthaka [mailto:chinthaka@opensource.lk]
>Gesendet: Montag, 15. August 2005 03:28
>An: axis-user@ws.apache.org
>Betreff: RE: [Axis2] [0.9] AW: AXIOM-SOAP-Problem
>
>Hi aii,
>
>Sorry for not answering this email earlier.
>
>(BTW, prefix all your Axis2 related dev or user mails with [Axis2]. 0.9 is
>not needed.)
>
>The one of the reasons behind us providing this AXIOM is to give streaming
>support for Axis2. We wanted to have an Object model which relies on an
>underlying pull stream. Thats why you can find constructors in
>StAXSOAPModelBuilder which gets an XMLStreamReader as input.
>
>But this will not hinder anyone like you, if you want to build it from an
>existing source like a String. What Jeff suggested was correct.
>
>But the way he did that was not according to Axiom principles. Axiom is
>designed to provide the high performance with low memory foot print. If you
>create a String from the incoming stream and then creating another stream
is
>not that good as this will not minimize memory usage. Better try to wrap
the
>incoming TCP stream with XMLStreamReader. <Better read the AXIOM tutorial>
>
>Anyway seems like you have some other problem now. If you can send me the
>SOAP message as a String which you have, I can test it with
>StAXSOAPModelBuilder. If I can remember correct the only place OMAttribute
>gives exceptions is where you try to give it a namespace, which has not
been
>defined within the scope. I cant give a solid answer without looking at
it.
>
>Regards,
>Eran Chinthaka
>
>
>
>>Jeff,
>>
>>thanks for your help! Your code works.
>>
>>Now I receive an exception while using StAXSOAPModelBuilder:
>>
>>// this works now (I tested the output)
>>XMLStreamReader xmlr = xmlif.createXMLStreamReader(new StringReader(new
>>String(data)));
>>
>>// this not ...
>>StAXBuilder builder = new StAXSOAPModelBuilder(xmlr);
>>//StAXBuilder builder = new StAXSOAPModelBuilder(xmlr, null);
>>
>>// ... and leads to this Exception:
>>java.lang.ExceptionInInitializerError
>>Caused by: java.lang.NullPointerException
>> at java.util.regex.Matcher.getTextLength(Unknown Source)
>> at java.util.regex.Matcher.reset(Unknown Source)
>> at java.util.regex.Matcher.<init>(Unknown Source)
>> at java.util.regex.Pattern.matcher(Unknown Source)
>> at
>>org.apache.axis2.om.impl.llom.OMAttributeImpl.<clinit>(OMAttributeImpl.jav
>>a:
>>52)
>>
>>
>>What do I have to change?
>>
>>Thanks again for help,
>>Chris
>>
>>P.S. The whole code fragment and exception is listed below
>>
>>
>>-#- <Code> -------------------------------------------------------------#-
>>-
>>// Copy the data from udp packet, remove zero-bytes and restore SOAP
>>byte[] buffer = packet.getData();
>>byte[] data = new byte[findZeroByte(0, buffer)];
>>System.arraycopy(buffer, 0, data, 0, data.length);
>>
>>// Init. XMLInputFactory instance
>>if (xmlif == null) {
>> initXMLInputFactory();
>>}
>>
>>// Convert SOAP-bytes to stream, build SOAPModel && extract SOAPEnvelope
>>XMLStreamReader xmlr = null;
>>try {
>> xmlr = xmlif.createXMLStreamReader(new StringReader(
>> new
>>String(data)));
>> //StAXBuilder builder = new StAXSOAPModelBuilder(xmlr, null);
>> StAXBuilder builder = new StAXSOAPModelBuilder(xmlr);
>> SOAPEnvelope envelope = (SOAPEnvelope) builder.getDocumentElement();
>> ...
>>-#- </Code> -------------------------------------------------------------
>>#--
>>
>>
>>-#- <Exception> ---------------------------------------------------------
>>#--
>>java.lang.ExceptionInInitializerError
>> at
>>org.apache.axis2.om.impl.llom.OMElementImpl.addAttribute(OMElementImpl.jav
>>a:
>>464)
>> at
>>org.apache.axis2.om.impl.llom.builder.StAXBuilder.processAttributes(StAXBu
>>il
>>der.java:126)
>> at
>>org.apache.axis2.soap.impl.llom.builder.StAXSOAPModelBuilder.constructNode
>>(S
>>tAXSOAPModelBuilder.java:278)
>> at
>>org.apache.axis2.soap.impl.llom.builder.StAXSOAPModelBuilder.createOMEleme
>>nt
>>(StAXSOAPModelBuilder.java:166)
>> at
>>org.apache.axis2.soap.impl.llom.builder.StAXSOAPModelBuilder.next(StAXSOAP
>>Mo
>>delBuilder.java:302)
>> at
>>org.apache.axis2.om.impl.llom.OMElementImpl.getNextSibling(OMElementImpl.j
>>av
>>a:268)
>> at
>>org.apache.axis2.om.impl.llom.traverse.OMChildrenQNameIterator.hasNext(OMC
>>hi
>>ldrenQNameIterator.java:74)
>> at
>>org.apache.axis2.om.impl.llom.OMElementImpl.getFirstChildWithName(OMElemen
>>tI
>>mpl.java:232)
>> at
>>org.apache.axis2.soap.impl.llom.SOAPEnvelopeImpl.getHeader(SOAPEnvelopeImp
>>l.
>>java:58)
>> at
>>org.apache.axis2.soap.impl.llom.builder.StAXSOAPModelBuilder.parseHeaders(
>>St
>>AXSOAPModelBuilder.java:129)
>> at
>>org.apache.axis2.soap.impl.llom.builder.StAXSOAPModelBuilder.<init>(StAXSO
>>AP
>>ModelBuilder.java:92)
>> at
>>de.iken.test.UDP.axis2.UDPWorkerTest.doWork(UDPWorkerTest.java:55)
>> at
>>org.apache.axis2.util.threadpool.ThreadWorker.run(ThreadWorker.java:34)
>>Caused by: java.lang.NullPointerException
>> at java.util.regex.Matcher.getTextLength(Unknown Source)
>> at java.util.regex.Matcher.reset(Unknown Source)
>> at java.util.regex.Matcher.<init>(Unknown Source)
>> at java.util.regex.Pattern.matcher(Unknown Source)
>> at
>>org.apache.axis2.om.impl.llom.OMAttributeImpl.<clinit>(OMAttributeImpl.jav
>>a:
>>52)
>> ... 13 more
>>-#- </Exception> --------------------------------------------------------
>>#--
>>
>>-----Ursprüngliche Nachricht-----
>>Von: Jeff Greif [mailto:jgreif@alumni.princeton.edu]
>>Gesendet: Samstag, 13. August 2005 15:56
>>An: axis-user@ws.apache.org
>>Betreff: Re: AXIOM-SOAP-Problem
>>
>>I think you can do this:
>> String data = new String(packet.getData());
>> StringReader sr = new StringReader(data);
>> XMLStreamReader xmlReader
>> = XMLInputFactory.newInstance().createXMLStreamReader(sr);
>>
>>Jeff
>>
>>aii@gmx.de wrote:
>>
>>
>>
>>>Hi all,
>>>
>>>I've got a question about AXIOM and SOAP:
>>>
>>>If I like to have the SOAPEnvelope from a stream, I can do it like this:
>>>
>>>//create the SOAP Envelope
>>>Reader in = new InputStreamReader(socket.getInputStream());
>>>XMLStreamReader xmlreader =
>>>XMLInputFactory.newInstance().createXMLStreamReader(in);
>>>StAXBuilder builder = new StAXSOAPModelBuilder(xmlreader, null);
>>>SOAPEnvelope envelope = (SOAPEnvelope) builder.getDocumentElement();
>>>
>>>
>>>
>>>But if I've already stored the soap-text in a String ...
>>>
>>>// copy the data from udp packet
>>>byte[] buffer = packet.getData();
>>>String data = new String(buffer);
>>>
>>>... then there is the problem that the string 'data' must be converted in
>>>
>>>
>>a
>>
>>
>>>stream to use XMLStreamReader and StAXSOAPModelBuilder. Is this the only
>>>solution?
>>>
>>>
>>>In the JavaDoc of StAXOMBuilder is written that StAXOMBuilder will build
>>>
>>>
>>a
>>
>>
>>>generic memory model from any XML input source, such as a file, string,
>>>stream, etc..
>>>
>>>How it works for files and streams is clear, but how does it look like
>>>
>>>
>>for
>>
>>
>>>strings???
>>>
>>>I need this for a UDPTransportListener.
>>>
>>>
>>>
>>>Thanks for any help,
>>>Chris
>>>
>>>
>>>
>>>
>>>
>>>
>
>
>
>
>
>
--
The best way to predict the future is to invent it - Alan Kay
Re: [Axis2] AW: general XML parsing performance considerations for
small packets liek UDP [Re: [Axis2] AW: AW: AXIOM-SOAP-Problem
Posted by Aleksander Slominski <as...@cs.indiana.edu>.
aii@gmx.de wrote:
>Hi Aleksander,
>
>
>
>>you could readly directly byte array using specialized UTF8 (streaming)
>>reader and that may affect performance tests - XML paser will be only as
>>good as quality of input stream y ou give to it.
>>
>>
>
>Do you mean something like the following??
>
>
no i mean a specialzied high perf UTF8 Reader that will do internal
buffering and avoid BufferedInputStream alltogether (that would do
second buffering which is not needed for such small input) and is
specialized so more efficient than generic InputStreamReader(..., "UTF8").
i did not do extensive testing but here is one i wrote which i believe
is quite efficient :
http://www.extreme.indiana.edu/viewcvs/~checkout~/xsul/java/modules/common/xsul/util/Utf8Reader.java
i CCed stax builder mailing list in case there is more ways to get it
improved that somebody knows about.
best,
alek
>---
>// Copy the data from udp packet
>byte[] data = packet.getData();
>
>// Build UTF8-ByteStream (not optimized)
>ByteArrayInputStream bais = new ByteArrayInputStream(data);
>InputStreamReader isr = null;
>try {
> isr = new InputStreamReader(new BufferedInputStream(bais, 8192),
>"UTF8");
>} catch (UnsupportedEncodingException e1) {
> e1.printStackTrace();
>}
>
>// Init. XMLInputFactory instance
>if (xmlif == null) {
> initXMLInputFactory();
>}
>
>// Build SOAPModel && extract SOAPEnvelope
>XMLStreamReader xmlr = null;
>try {
> xmlr = xmlif.createXMLStreamReader(isr);
> StAXBuilder builder = new StAXSOAPModelBuilder(xmlr);
> SOAPEnvelope envelope = (SOAPEnvelope) builder.getDocumentElement();
> ...
>---
>
>Unfortunately, I still receive a java.lang.ExceptionInInitializerError when
>using 'StAXSOAPModelBuilder(xmlr)'.
>
>
>Anyway, thanks a lot for your advice!
>Chris
>
>-----Ursprüngliche Nachricht-----
>Von: Aleksander Slominski [mailto:aslom@cs.indiana.edu]
>Gesendet: Montag, 15. August 2005 12:48
>An: axis-user@ws.apache.org
>Betreff: [Axis2] general XML parsing performance considerations for small
>packets liek UDP [Re: [Axis2] AW: AW: AXIOM-SOAP-Problem
>
>aii@gmx.de wrote:
>
>
>
>>Hi Eran,
>>
>>Thanks a lot for answering.
>>
>>
>>
>>
>>
>>>If you create a String from the incoming stream and then creating another
>>>stream is not that good as this will not minimize memory usage. Better try
>>>to wrap the incoming TCP stream with XMLStreamReader.
>>>
>>>
>>>
>>>
>>That's clear if you use TCP as transport mechanism. But I'd like to
>>integrate a Transport Sender and Transport Listener for UDP. Therefore I
>>receive only UDP packets (DatagramPacket), not a stream:
>>
>># DatagramPacket packet;
>># ...
>># // Copy the soap data from udp packet
>># byte[] buffer = packet.getData();
>>
>>After storing the SOAP data in a byte-array (buffer), the SOAP envelope
>>
>>
>must
>
>
>>be extracted to complete the Message Context. Then we are able to call the
>>Axis engine:
>>
>># SOAPEnvelope envelope;
>># ...
>># msgContext.setEnvelope(envelope);
>># if (envelope.getBody().hasFault()) {
>># engine.receiveFault(msgContext);
>># }
>># else {
>># engine.receive(msgContext);
>># }
>>
>>Does it make more sense to use SAX (like in Axis 1.*) instead of StAX to
>>construct the SOAP Envelope if the incoming SOAP messages aren't streams??
>>
>>
>>
>
>as UDP messages are very small it will not make much of difference as
>any goo parser will stream input in chunk and i would expect a sizeof
>chunk to be bigger than UDP packet so it should be only one read
>operation between parser and input.
>
>
>
>>I
>>would like to compare the performance of both variants.
>>
>>
>>
>in general there is no reason for performance difference between SAX and
>StAX APIs - optimized implementations will have very similiar performance.
>
>so what you comapre is just implementations of XML parsers and that has
>little to do with SOAP
>
>
>
>>For this purpose the
>>byte-array must be converted into a stream, for example:
>>
>>
>>
>>
>you could readly directly byte array using specialized UTF8 (streaming)
>reader and that may affect performance tests - XML paser will be only as
>good as quality of input stream y ou give to it.
>
>HTH.
>
>best,
>
>alek
>
>
>
>># // Convert SOAP-bytes to stream, build SOAPModel && extract SOAPEnvelope
>># XMLInputFactory xmlif;
>># ...
>># XMLStreamReader xmlr = xmlif.createXMLStreamReader(new StringReader(
>># new String(data)));
>># StAXBuilder builder = new StAXSOAPModelBuilder(xmlr);
>># SOAPEnvelope envelope = (SOAPEnvelope) builder.getDocumentElement();
>>
>>
>>
>>
>>
>>>If you can send me the SOAP message as a String which you have, I can test
>>>it with StAXSOAPModelBuilder.
>>>
>>>
>>>
>>>
>>I tried many different SOAP messages, also your one from
>>http://www.jaxmag.com/itr/magazine/downloads/jaxmag/chinthaka_axiom.zip
>>(soapmessage.xml).
>>But I always get the exception listed below.
>>
>>I list my simple test code here. Maybe you or anyone see my fault.
>>
>># private StAXSOAPModelBuilder getSOAPBuilder(String fileName) {
>># StAXSOAPModelBuilder builder = null;
>># try {
>># FileReader soapFileReader = new FileReader(fileName);
>># XMLStreamReader parser = XMLInputFactory.newInstance()
>># .createXMLStreamReader(soapFileReader);
>># //builder = new StAXSOAPModelBuilder(parser); // exception
>>here
>># builder = OMXMLBuilderFactory
>># .createStAXSOAPModelBuilder(OMAbstractFactory
>># .getSOAP12Factory(), parser); // exception here
>># } catch (XMLStreamException e) {
>># e.printStackTrace();
>># } catch (FileNotFoundException e) {
>># e.printStackTrace();
>># }
>># return builder;
>>#}
>>
>>
>>Thanks!!
>>Chris
>>
>>
>>
>>-----Ursprüngliche Nachricht-----
>>Von: Eran Chinthaka [mailto:chinthaka@opensource.lk]
>>Gesendet: Montag, 15. August 2005 03:28
>>An: axis-user@ws.apache.org
>>Betreff: RE: [Axis2] [0.9] AW: AXIOM-SOAP-Problem
>>
>>Hi aii,
>>
>>Sorry for not answering this email earlier.
>>
>>(BTW, prefix all your Axis2 related dev or user mails with [Axis2]. 0.9 is
>>not needed.)
>>
>>The one of the reasons behind us providing this AXIOM is to give streaming
>>support for Axis2. We wanted to have an Object model which relies on an
>>underlying pull stream. That’s why you can find constructors in
>>StAXSOAPModelBuilder which gets an XMLStreamReader as input.
>>
>>But this will not hinder anyone like you, if you want to build it from an
>>existing source like a String. What Jeff suggested was correct.
>>
>>But the way he did that was not according to Axiom principles. Axiom is
>>designed to provide the high performance with low memory foot print. If you
>>create a String from the incoming stream and then creating another stream
>>
>>
>is
>
>
>>not that good as this will not minimize memory usage. Better try to wrap
>>
>>
>the
>
>
>>incoming TCP stream with XMLStreamReader. <Better read the AXIOM tutorial>
>>
>>Anyway seems like you have some other problem now. If you can send me the
>>SOAP message as a String which you have, I can test it with
>>StAXSOAPModelBuilder. If I can remember correct the only place OMAttribute
>>gives exceptions is where you try to give it a namespace, which has not
>>
>>
>been
>
>
>>defined within the scope. I can’t give a solid answer without looking at
>>
>>
>it.
>
>
>>Regards,
>>Eran Chinthaka
>>
>>
>>
>>
>>
>>>Jeff,
>>>
>>>thanks for your help! Your code works.
>>>
>>>Now I receive an exception while using StAXSOAPModelBuilder:
>>>
>>>// this works now (I tested the output)
>>>XMLStreamReader xmlr = xmlif.createXMLStreamReader(new StringReader(new
>>>String(data)));
>>>
>>>// this not ...
>>>StAXBuilder builder = new StAXSOAPModelBuilder(xmlr);
>>>//StAXBuilder builder = new StAXSOAPModelBuilder(xmlr, null);
>>>
>>>// ... and leads to this Exception:
>>>java.lang.ExceptionInInitializerError
>>>Caused by: java.lang.NullPointerException
>>> at java.util.regex.Matcher.getTextLength(Unknown Source)
>>> at java.util.regex.Matcher.reset(Unknown Source)
>>> at java.util.regex.Matcher.<init>(Unknown Source)
>>> at java.util.regex.Pattern.matcher(Unknown Source)
>>> at
>>>org.apache.axis2.om.impl.llom.OMAttributeImpl.<clinit>(OMAttributeImpl.jav
>>>a:
>>>52)
>>>
>>>
>>>What do I have to change?
>>>
>>>Thanks again for help,
>>>Chris
>>>
>>>P.S. The whole code fragment and exception is listed below
>>>
>>>
>>>-#- <Code> -------------------------------------------------------------#-
>>>-
>>>// Copy the data from udp packet, remove zero-bytes and restore SOAP
>>>byte[] buffer = packet.getData();
>>>byte[] data = new byte[findZeroByte(0, buffer)];
>>>System.arraycopy(buffer, 0, data, 0, data.length);
>>>
>>>// Init. XMLInputFactory instance
>>>if (xmlif == null) {
>>> initXMLInputFactory();
>>>}
>>>
>>>// Convert SOAP-bytes to stream, build SOAPModel && extract SOAPEnvelope
>>>XMLStreamReader xmlr = null;
>>>try {
>>> xmlr = xmlif.createXMLStreamReader(new StringReader(
>>> new
>>>String(data)));
>>> //StAXBuilder builder = new StAXSOAPModelBuilder(xmlr, null);
>>> StAXBuilder builder = new StAXSOAPModelBuilder(xmlr);
>>> SOAPEnvelope envelope = (SOAPEnvelope) builder.getDocumentElement();
>>> ...
>>>-#- </Code> -------------------------------------------------------------
>>>#--
>>>
>>>
>>>-#- <Exception> ---------------------------------------------------------
>>>#--
>>>java.lang.ExceptionInInitializerError
>>> at
>>>org.apache.axis2.om.impl.llom.OMElementImpl.addAttribute(OMElementImpl.jav
>>>a:
>>>464)
>>> at
>>>org.apache.axis2.om.impl.llom.builder.StAXBuilder.processAttributes(StAXBu
>>>il
>>>der.java:126)
>>> at
>>>org.apache.axis2.soap.impl.llom.builder.StAXSOAPModelBuilder.constructNode
>>>(S
>>>tAXSOAPModelBuilder.java:278)
>>> at
>>>org.apache.axis2.soap.impl.llom.builder.StAXSOAPModelBuilder.createOMEleme
>>>nt
>>>(StAXSOAPModelBuilder.java:166)
>>> at
>>>org.apache.axis2.soap.impl.llom.builder.StAXSOAPModelBuilder.next(StAXSOAP
>>>Mo
>>>delBuilder.java:302)
>>> at
>>>org.apache.axis2.om.impl.llom.OMElementImpl.getNextSibling(OMElementImpl.j
>>>av
>>>a:268)
>>> at
>>>org.apache.axis2.om.impl.llom.traverse.OMChildrenQNameIterator.hasNext(OMC
>>>hi
>>>ldrenQNameIterator.java:74)
>>> at
>>>org.apache.axis2.om.impl.llom.OMElementImpl.getFirstChildWithName(OMElemen
>>>tI
>>>mpl.java:232)
>>> at
>>>org.apache.axis2.soap.impl.llom.SOAPEnvelopeImpl.getHeader(SOAPEnvelopeImp
>>>l.
>>>java:58)
>>> at
>>>org.apache.axis2.soap.impl.llom.builder.StAXSOAPModelBuilder.parseHeaders(
>>>St
>>>AXSOAPModelBuilder.java:129)
>>> at
>>>org.apache.axis2.soap.impl.llom.builder.StAXSOAPModelBuilder.<init>(StAXSO
>>>AP
>>>ModelBuilder.java:92)
>>> at
>>>de.iken.test.UDP.axis2.UDPWorkerTest.doWork(UDPWorkerTest.java:55)
>>> at
>>>org.apache.axis2.util.threadpool.ThreadWorker.run(ThreadWorker.java:34)
>>>Caused by: java.lang.NullPointerException
>>> at java.util.regex.Matcher.getTextLength(Unknown Source)
>>> at java.util.regex.Matcher.reset(Unknown Source)
>>> at java.util.regex.Matcher.<init>(Unknown Source)
>>> at java.util.regex.Pattern.matcher(Unknown Source)
>>> at
>>>org.apache.axis2.om.impl.llom.OMAttributeImpl.<clinit>(OMAttributeImpl.jav
>>>a:
>>>52)
>>> ... 13 more
>>>-#- </Exception> --------------------------------------------------------
>>>#--
>>>
>>>-----Ursprüngliche Nachricht-----
>>>Von: Jeff Greif [mailto:jgreif@alumni.princeton.edu]
>>>Gesendet: Samstag, 13. August 2005 15:56
>>>An: axis-user@ws.apache.org
>>>Betreff: Re: AXIOM-SOAP-Problem
>>>
>>>I think you can do this:
>>> String data = new String(packet.getData());
>>> StringReader sr = new StringReader(data);
>>> XMLStreamReader xmlReader
>>> = XMLInputFactory.newInstance().createXMLStreamReader(sr);
>>>
>>>Jeff
>>>
>>>aii@gmx.de wrote:
>>>
>>>
>>>
>>>
>>>
>>>>Hi all,
>>>>
>>>>I've got a question about AXIOM and SOAP:
>>>>
>>>>If I like to have the SOAPEnvelope from a stream, I can do it like this:
>>>>
>>>>//create the SOAP Envelope
>>>>Reader in = new InputStreamReader(socket.getInputStream());
>>>>XMLStreamReader xmlreader =
>>>>XMLInputFactory.newInstance().createXMLStreamReader(in);
>>>>StAXBuilder builder = new StAXSOAPModelBuilder(xmlreader, null);
>>>>SOAPEnvelope envelope = (SOAPEnvelope) builder.getDocumentElement();
>>>>
>>>>
>>>>
>>>>But if I've already stored the soap-text in a String ...
>>>>
>>>>// copy the data from udp packet
>>>>byte[] buffer = packet.getData();
>>>>String data = new String(buffer);
>>>>
>>>>... then there is the problem that the string 'data' must be converted in
>>>>
>>>>
>>>>
>>>>
>>>a
>>>
>>>
>>>
>>>
>>>>stream to use XMLStreamReader and StAXSOAPModelBuilder. Is this the only
>>>>solution?
>>>>
>>>>
>>>>In the JavaDoc of StAXOMBuilder is written that StAXOMBuilder will build
>>>>
>>>>
>>>>
>>>>
>>>a
>>>
>>>
>>>
>>>
>>>>generic memory model from any XML input source, such as a file, string,
>>>>stream, etc..
>>>>
>>>>How it works for files and streams is clear, but how does it look like
>>>>
>>>>
>>>>
>>>>
>>>for
>>>
>>>
>>>
>>>
>>>>strings???
>>>>
>>>>I need this for a UDPTransportListener.
>>>>
>>>>
>>>>
>>>>Thanks for any help,
>>>>Chris
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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--
The best way to predict the future is to invent it - Alan Kay