I will start like a goofy: this is my first post:)
Description: I hava app written 4years ago. It was based on GWT 1.2,
and it was 100% client side app.
The GWT app developer is gone from company (crisis or lets call this
multitasking:) and i have to add servlet that will generate pdf with
some data from the from on the www page. The pdf has to be open in new
tab, and be ganerated on fly.
I started with simplest possible idea, am trying to generate just
empty pdf, i have it ready and compiled to *.jasper format.
This is what i have made so far:
Added two interfaces on client side:
_______________________________________________
package com.progmac.kkk.client;
public interface DataService extends RemoteService{
public String getData();
}
_______________________________________________
package com.progmac.kkk.client;
import com.google.gwt.user.client.rpc.AsyncCallback;
public interface DataServiceAsync {
public void getData(AsyncCallback callback);
}
_______________________________________________
server side servlet implementation (don't lough please:)
package com.progmac.kkk.server;
public class DataServiceImpl extends RemoteServiceServlet implements
DataService{
byte[] data;
public String getData() {
GWT.log("START... " ,null);
GWT.log("Documents: failed getting report:
KKK_REP.jasper",null);
RequestBuilder requestBuilder = new
RequestBuilder(RequestBuilder.GET,
/*!!!!!! HERE I GET ERROR!!!!!*/
"KKK_REP.jasper");
try {
requestBuilder.sendRequest(null, new RequestCallback() {
public void onError(Request request, Throwable
exception) {
GWT.log("Documents: failed getting
report: KKK_REP.jasper",
exception);
}
public void onResponseReceived(Request request,
Response response) {
Map<Object, Object> map = new
HashMap<Object, Object>();
map.put("logo", "logo");
try {
//file.jasper path
final String reportPath = "com/progmac/kkk/
public/KKK_REP.jasper";
URL url =
ClassLoader.getSystemResource(reportPath);
File file = new File(url.toURI());
InputStream inputStream = new
FileInputStream(file);
JasperPrint jasperPrint =
JasperFillManager.fillReport(inputStream,map);
data =
JasperExportManager.exportReportToPdf(jasperPrint);
/*response.setContentLength(report.length);
ServletOutputStream out =
response.getOutputStream();
out.write(report);
out.flush();
out.close();*/
} catch (Exception e) {
e.printStackTrace();
}
}
});
} catch (RequestException e) {
GWT.log("failed getting documents list", e);
}
String token = new
Long(Calendar.getInstance().getTimeInMillis()).toString();
HttpServletRequest request = this.getThreadLocalRequest();
HttpSession session = request.getSession();
session.setAttribute(token, data);
return data.toString();
}
}
_______________________________________________
Widget where i call the sevlet button listener
private class ButtonClickListener implements ClickListener {
public void onClick(Widget sender) {
// call servlet to get data
service.getData(new AsyncCallback() {
public void onFailure(Throwable e) {
label.setText("Server call failed");
}
public void onSuccess(Object obj) {
if (obj != null) {
label.setText(obj.toString());
String token = (String) obj;
Window.open("DataServiceImpl?token=" + token,
"_blank",
"menubar=yes,location=yes,resizable=yes,scrollbars=yes,status=yes");
} else {
label.setText("Server call returned nothing");
}
}
});
______________________________________________________________
1. The problem is in line:
RequestBuilder requestBuilder = new
RequestBuilder(RequestBuilder.GET,
/*!!!!!! HERE I GET ERROR!!!!!*/
where am trying to read the compiled file from publci folder.
2. Do you have any idea, how to read the compiled *.jasper file(code
example...) and how to grab in buttons listener?
3. Maybe my idea with requestBuilder is completly wrong...
4.Thanks in advance for any explenations, or any code examples...
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