JAXP support (JSR-172, Web Services)

[vanekur]

Is it a fact that all of S80, S60 and S40 3rd Edition Feature Pack 1 based devices support jaxp?

But, S40 2nd Edition devices don't, right?

Is that pretty much it, when it comes to jaxp support? Would there be a cross reference of which devices are ok with jaxp (JSR 172)?

BTW, am I confusing S40 with Series 40 and all that? I'm not sure when to use 'Series', as opposed to Sxx...

Thanks,
Karoly

[hartti]

S60 devices have Web Services API (JSR-172) starting from 2nd Edition Feature Pack 3 (N70, N90) and it is available on S60 3rd Edtion devices.

On Series 40 side you need to have a 3rd Edition Feature Pack 1 device. Those contain the JAXP part of the JSR-172. Series 40 2nd/3rd Edition devices do not have that functionality

The official naming convention is Series 40 and S60.

Hartti

[peterblazejewicz]

hi all,
and S80 does not support JSR-172,
by the way:
http://discussion.forum.nokia.com/fo...104#post222104

regards,
Peter

[vanekur]

Thanks Hartti!

And so, if my understanding is correct, for Series 40 2nd/3rd Edition devices, the only way to implement a j2me based web services client is to use kSOAP or Wingfoot, right?

In other words, j2me client stubs generated by my weblogic utilities or Sun's WTK can only be used on the devices that support JSR 172.

Just wanted to close my train of thought on this.

k

[vanekur]

I think it says that through an add-on, Series 80 developers can indeed create web services applications, no? Or that is outdated too?

[peterblazejewicz]

hi Karoly,
as to other ways to implement both,
here is starting post from netbeans mobility team member about how to write both without using 3rd party lib but with middle-tier bridge:
http://blogs.sun.com/roller/page/luk...nection_bridge
(autogenerated code),

regards,
Peter

[hartti]

vanekur, of course XML parsing is just string manipulation, so you can add the functionality to your midlet by including a number of XML processing classes.

Did this answer your question?

Hartti

[vanekur]

You're correct about string processing, of course, but in terms of simplifying web services interactions WITHOUT a jaxp implementation, those two were the only ones I could find.

[vanekur]

Hmm, that's interesting looking concept. What do you suppose is behind the phrase 'binary protocol'? And just what exactly is in the middle-tier? A servlet? I've got no audio with the flash demo and I haven't had a chance to play with NetBeans and the Mobility Pack yet.

Thanks Peter,
Karoly

[peterblazejewicz]

hi Karoly,

yes, it creates servlet build upon web service client (client in web tier) and code for mobile client with using only standrad mipd/cldc abilities,
for example: Amazon ECS sample client generates required servlet and client code,
snippet from client generated code:

private Object invokeServer(int requestID, Object[] parameters) throws IOException {
        HttpConnection connection = (HttpConnection) Connector.open( serverURL );
        connection.setRequestMethod(HttpConnection.POST);
        connection.setRequestProperty("Content-Type", "application/octet-stream");
        connection.setRequestProperty("Accept", "application/octet-stream");
        
        if (sessionCookie == null) {
            // if this is the first time this client contatcs the server,
            // verify that the version matches
            connection.setRequestProperty("version", "14-Jul-2006/11:14:52-CEST");
        } else {
            connection.setRequestProperty("cookie", sessionCookie);
        }
        
        DataOutputStream output = connection.openDataOutputStream();
        
        writeObject(output, this);
        
        /* Write the byte signifying that only one call
         * is being made.
         */
        output.writeShort(1 /* one call to be made to the server */);
        
        output.writeInt(requestID);
        for (int i = 0; i < parameters.length; i++ ) {
            writeObject(output, parameters[i]);
        }
        
        output.close();
        
        int response;
        try {
            response = connection.getResponseCode();
        } catch (IOException e) {
            throw new IOException("No response from " + serverURL);
        }
        if (response != 200) {
            throw new IOException(response + " " + connection.getResponseMessage());
        }
        DataInputStream input = connection.openDataInputStream();
        String sc = connection.getHeaderField("set-cookie");
        if (sc != null) {
            sessionCookie = sc;
        }
        short errorCode = input.readShort();
        if (errorCode != 1) {
            // there was a remote exception
            throw new IOException((String) readObject(input));
        }
        
        Object returnValue = readObject(input);
        
        input.close();
        connection.close();
        return returnValue;
    } 

 private void writeObject(DataOutputStream out, Object o) throws IOException {
        if (o == this) {
            out.writeShort(1 /* invocation code */);
        } else if (o == null) {
            out.writeShort(-1);
        } else if (o.getClass().isArray()) {
            out.writeShort(-2 /* ARRAY TYPE */);
            Object[] array = (Object[]) o;
            if (o instanceof String[]) {
                out.writeShort(7 /* STRING_TYPE */);
            } else if ( o instanceof amazonclient.BrowseNode[]) {
                out.writeShort(27 /* TYPE_amazonclient_BrowseNode */);
            } else if ( o instanceof amazonclient.KeyPhrase[]) {
                out.writeShort(28 /* TYPE_amazonclient_KeyPhrase */);
            } else if ( o instanceof amazonclient.Track[]) {
                out.writeShort(33 /* TYPE_amazonclient_Track */);
            } else if ( o instanceof amazonclient.Details[]) {
                out.writeShort(26 /* TYPE_amazonclient_Details */);
            } else if ( o instanceof amazonclient.CustomerReview[]) {
                out.writeShort(30 /* TYPE_amazonclient_CustomerReview */);
            } else if ( o instanceof amazonclient.ThirdPartyProductDetails[]) {
                out.writeShort(32 /* TYPE_amazonclient_ThirdPartyProductDetails */);
            }
.......
.... 

I never used it in real-life project (to be fair I'm newbie), but that's just interesting option
hth,
regards,
Peter