Re: [Webware-discuss] The appserver crash when high demand?

[marcelo a. <mam...@gm...>]

Christoph Zwerschke wrote:
> marcelo ametller wrote:
> 
>> I have a servlet, with a form, a button with label "generate".
>> When the user press the button, de "action" run a function, it generate
>> a pdf (reportlab).
>> When the pdf have 200 items, that's ok. But when the pdf have 6000
>> items, the appserver crash. The dmesg inform that there isn't memory...
> 
> 
> Does this crash immediately after you start the appserver and generate
> the very first pdf? Or does it only happen after some time when more
> users have been on the server?

it only crash after some time... the time for generate de pdf is 20min.

> 
> What do you get in the Webware logfile?
nothing...


> 
> Do you create the pdf in memory only or do you write it to a file?
i not know that...
i paste de code here:

action for the botton:

	def generar(self):		
		fecha1=self.form.field('fecha1').value()
		fecha2=self.form.field('fecha2').value()
		
		self.session().setValue('fecha1', fecha1)
		self.session().setValue('fecha2', fecha2) 		
		url='/menu/fac/inf/v/libFactR1'
		self.response().sendRedirect(url)
		self.writeBody()	

part of the servlet:

def writeHTML(self):
		req=self.request()		
		self.fecha1=self.session().value('fecha1')
		self.fecha2=self.session().value('fecha2')
		self.empresa = empresa.nombre	
		self.titulo = "Resumen Libro Facturacion - Facturas generadas entre %s
- %s" % (self.fecha1,self.fecha2)

		fact= Fact1()
		#consulta sql (return 6000 regs for 10 columns)
		self.listado= fact.lisLibFactR1(self.fecha1,self.fecha2)
		
		buffer=StringIO()
		doc = SimpleDocTemplate(buffer,pagesize=A4,leftMargin=3*cm)
		doc.setTitle=self.titulo
		doc.setAuthor='operador'
		
		Story = []
		data=self.listado	
		colwidths=(10*cm,2*cm)
		t=Table( data, colwidths)
		t.setStyle(TableStyle([('VALIGN',(0,0),(-1,-1),'MIDDLE'),					
('GRID',(0,0),(-1,-1),  0,colors.grey),						('BOX', (0,0), (-1,-1),
1, colors.black),						]))

		Story.append(t)
		Story.append(Spacer(1,0.2*cm))
			
		doc.build(Story, onFirstPage=self.myFirstPage,
onLaterPages=self.myLaterPages)
		pdf=buffer.getvalue()
		buffer.close()
		
		self.response().setHeader('Content-Type', 'application/pdf')
		self.response().setHeader('Content-Length', str(len(pdf)))
		self.response().setHeader('Content-Disposition', 'inline;
filename="ReslibFact.pdf"')
		self.write(pdf)


thanks for you time...

Marcelo