var childWorkerId =
workerPool.createWorkerFromUrl('databaseworker.js');
This code from function insertdata(data){} returns "workerPool is not
defined".
If I define workerpool as: var workerPool =
google.gears.factory.create('beta.workerpool');
I don't see any insertdata() values in firebug. If I leave workerpool is not
defined I see the data to be inserted into the database.
Any clues on what to do now?
meerkat
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]
> On Behalf Of Oblygre
> Sent: Tuesday, February 10, 2009 6:22 AM
> To: Gears Users
> Subject: [gears-users] Re: MYSQL JSON SQLITE
>
>
> Use httpreqeust to read from your php on the server into a variable
> (serverresponse) on the gears computer.
> Then you can use a worker to read data into the sql database.
>
> I use something like this:
> Note: Settext is just for returning some info back to the user
> function floadfromdatabase(){
> if (script_active==1)
> {settext("Error: Script is already running...","program_status");
> return false;}
> if (checkonlinestatus()==false)
> {settext("Error: Not online. Network error?","program_status");
> return false;}
> settext("Reading data from main DB...","program_status");
> script_active=1;
> var link="/getdata.php?q=" + Math.floor(Math.random() * 100000); ;
>
> data="";
> var request = google.gears.factory.create('beta.httprequest');
> request.open('GET', link);
> request.onreadystatechange = function() {
> if (request.readyState == 4) {
> try {
> data=request.responseText;
> }
> catch (ex) {
> settext("Status: Error reading data from main
> DB","program_status");
> active_script=0;
> return;
> }
>
> if (data.length==0)
> settext('<font color="RED">No data found. Network error?</
> font>',"program_status")
> else {
> settext("Status: "+data.length+" byte(s) read from main DB,
> adding data to local DB","program_status");
> insertdata(data);
> }
> }
> };
> request.send();
>
> }
> function insertdata(data){
> var childWorkerId =
> workerPool.createWorkerFromUrl('databaseworker.js');
> workerPool.sendMessage(data, childWorkerId);
>
> return;
> }
>
>
> // databaseworker.js
> var wp = google.gears.workerPool;
>
> wp.onerror = function(errorObject) {
> alert("Error in workerPool: "+errorObject.message+" on
> line"+errorObject.lineNumber);
> };
>
> wp.onmessage = function(a, b, message) {
> if (1) {
> try {
> eval("dataarr="+serverresponse);
>
> }
> catch (ex) {
> alert("Error: No valid data found..");
> return;
> }
>
> var dbcount=0;
> var reply="no reply";
> var db ;
> db= google.gears.factory.create('beta.database');
> if (db) {
> db.open('yourdatabase');
> db.execute('begin');
> db.execute('drop table if exists yourtable');
> db.execute('create table if not exists yourtable' +
> ' (yourfield1, yourfield2, yourfield3, primary key
> (yourfield1))');
> for (x in dataarr)
> {
> db.execute('insert into yourtable values(?,?,?)',
> [dataarr[x].yourfield1,dataarr[x].yourfield2,dataarr
> [x].yourfield3];
> dbcount++;
> //if (dbcount%100==0)
> //wp.sendMessage(dbcount+" record(s) added....",
> message.sender);
> }
> }
> db.execute('commit');
> db.close();
> reply=dbcount+" record(s) added from main DB, finished"; }
> wp.sendMessage(reply, message.sender);
> }
>
>
> On Feb 9, 10:14 pm, meerkat <[email protected]> wrote:
> > Ok. Got round the php4 issue.
> >
> > Any clues on how to do "data from server is saved in serverresponse"?
> >
> > Thanks
> >
> > On Feb 9, 2:34 pm, meerkat <[email protected]> wrote:
> >
> > > The web server I am working with is still on php4. This means
> > > json_encode($dataarray); is not supported. What strategy would I use
> > > instead?
> > > Thanks,
> > > meerkat
> >
> > > On Feb 9, 1:03 pm, "Tosca Lahiri" <[email protected]> wrote:
> >
> > > > Thanks for this advice.
> > > > In the php code is the $dataarray made up of:
> > > > [fieldname, value]?
> >
> > > > I have found the xml tutorial you suggested...it is very good. That
> is what
> > > > made me go down the xml route. I can see now however why the json
> option is
> > > > preferable.
> > > > TML
> >
> > > > -----Original Message-----
> > > > > From: [email protected] [mailto:gears-
> [email protected]]
> > > > > On Behalf Of Oblygre
> > > > > Sent: Monday, February 09, 2009 6:41 AM
> > > > > To: Gears Users
> > > > > Subject: [gears-users] Re: MYSQL XML SQLITE
> >
> > > > > I think its easier to use json istead of xml, this saves a lot of
> time
> > > > > in javascript, and PHP have built in functions to convert to json.
> >
> > > > > Example:
> >
> > > > > In your php script:
> > > > > echo json_encode($dataarray); // $dataarray contains all your db
> data
> >
> > > > > In your gearscode:
> > > > > //data from server is saved in serverresponse
> > > > > //
> > > > > try {
> > > > > eval("dataarr="+serverresponse);
> >
> > > > > }
> > > > > catch (ex) {
> > > > > alert("Error: No valid data found..");
> > > > > return;
> > > > > }
> >
> > > > > var dbcount=0;
> > > > > var reply="no reply";
> > > > > var db ;
> > > > > db= google.gears.factory.create('beta.database');
> > > > > if (db) {
> > > > > db.open('yourdatabase');
> > > > > db.execute('begin');
> > > > > db.execute('drop table if exists yourtable');
> > > > > db.execute('create table if not exists yourtable' +
> > > > > ' (yourfield1, yourfield2, yourfield3, primary key
> > > > > (yourfield1))');
> > > > > for (x in dataarr)
> > > > > {
> > > > > db.execute('insert into yourtable values(?,?,?)',
> > > > > [dataarr[x].yourfield1,dataarr[x].yourfield2,dataarr
> > > > > [x].yourfield3];
> > > > > dbcount++;
> > > > > //if (dbcount%100==0)
> > > > > //wp.sendMessage(dbcount+" record(s) added....",
> > > > > message.sender);
> > > > > }
> > > > > }
> > > > > db.execute('commit');
> > > > > db.close();
> > > > > reply=dbcount+" record(s) added from main DB, finished";
> >
> > > > > A link to a tutorial using XML:
> > > > >http://www.onlamp.com/pub/a/onlamp/2007/06/28/the-power-of-google-
> gears-
> > > > > part-1.html
> >
> > > > > On Feb 8, 2:37 am, TML <[email protected]> wrote:
> > > > > > Just to clarify...I mean programmatically, not a one off with a
> tool.
> > > > > > When the user goes online on their pda the data is imported into
> the
> > > > > > locally held sqlite db.
> >
> > > > > > On Feb 8, 1:34 am, TML <[email protected]> wrote:
> >
> > > > > > > Hello,
> >
> > > > > > > I have a MySQL DB on web server. I have php page that extracts
> the
> > > > > > > data from table and creates an XML file.
> >
> > > > > > > Now, I need to know how to import that data in the XML file
> into the
> > > > > > > Gears sqlite DB on PDA?
> >
> > > > > > > Any suggestions?
> >
> > > > > > > Thanks,
> > > > > > > TML
