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GENERATING IN MULTIPROCESSING
=============================
This is exactly the same report we made for "without-Django" test. But this is going
to be ran under an independent Process, from multiprocessing library.
Is important to keep aware on:
- multiprocessing works on Python 2.3 or higher - and is a builtin package on 2.6
- you must use 'generate_under_process_by' instead of 'generate_by'
- you can do it without 'generate_under_process_by', using geraldo.utils.run_under_process
decorator, if you prefer do it manually
- the method ''generate_under_process_by' is not the best solution ever. You must keep
aware on what kind of report generation you are doing, and how server is configure, but
most of cases will work well
- the decorator 'run_under_process' will work only if geraldo.utils.DISABLE_MULTIPROCESSING
is False
>>> import os
>>> cur_dir = os.path.dirname(os.path.abspath(__file__))
>>> from geraldo.utils import A4, cm, TA_CENTER, TA_RIGHT
>>> from geraldo import Report, ReportBand, Label, ObjectValue, SystemField,\
... FIELD_ACTION_COUNT, BAND_WIDTH
Report class
>>> class SimpleListReport(Report):
... title = 'Demonstration without Django'
...
... class band_page_header(ReportBand):
... height = 1.3*cm
... elements = [
... SystemField(expression='%(report_title)s', top=0.1*cm, left=0, width=BAND_WIDTH,
... style={'fontName': 'Helvetica-Bold', 'fontSize': 14, 'alignment': TA_CENTER}),
... Label(text="ID", top=0.8*cm, left=0),
... Label(text="Name", top=0.8*cm, left=3*cm),
... ]
... borders = {'bottom': True}
...
... class band_page_footer(ReportBand):
... height = 0.5*cm
... elements = [
... Label(text='Created with Geraldo Reports', top=0.1*cm, left=0),
... SystemField(expression='Page # %(page_number)d of %(page_count)d', top=0.1*cm,
... width=BAND_WIDTH, style={'alignment': TA_RIGHT}),
... ]
... borders = {'top': True}
...
... class band_detail(ReportBand):
... height = 0.5*cm
... elements = [
... ObjectValue(attribute_name='id', top=0, left=0),
... ObjectValue(attribute_name='name', top=0, left=3*cm),
... ]
>>> class MyObject(object):
... def __init__(self, **kwargs):
... for k,v in kwargs.items():
... setattr(self, k, v)
>>> objects_list = [
... MyObject(id=1, name='Rio de Janeiro'),
... MyObject(id=2, name='New York'),
... MyObject(id=3, name='Paris'),
... MyObject(id=4, name='London'),
... MyObject(id=5, name='Tokyo'),
... MyObject(id=6, name='Moscow'),
... MyObject(id=7, name='Beijing'),
... MyObject(id=8, name='Hamburg'),
... MyObject(id=9, name='New Delhi'),
... MyObject(id=10, name='Jakarta'),
... ]
>>> report = SimpleListReport(queryset=objects_list)
PDF generation
>>> from geraldo.generators import PDFGenerator
>>> report.generate_under_process_by(PDFGenerator, filename=os.path.join(cur_dir, 'output/generated-in-multiprocessing.pdf'))
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