0de607514d
git-svn-id: svn://svn.cy55.de/Zope3/src/loops/trunk@1686 fd906abe-77d9-0310-91a1-e0d9ade77398
92 lines
2.8 KiB
Text
92 lines
2.8 KiB
Text
===============================================================
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loops - Linked Objects for Organization and Processing Services
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===============================================================
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Integration of external sources.
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($Id$)
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Setting up a loops Site and Utilities
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=====================================
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Let's do some basic set up
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>>> from zope import component, interface
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>>> from zope.traversing.api import getName
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>>> from zope.app.testing.setup import placefulSetUp, placefulTearDown
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>>> site = placefulSetUp(True)
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and build a simple loops site with a concept manager and some concepts
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(with a relation registry, a catalog, and all the type machinery - what
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in real life is done via standard ZCML setup or via local utility
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configuration):
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>>> from loops.integrator.testsetup import TestSite
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>>> t = TestSite(site)
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>>> concepts, resources, views = t.setup()
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>>> len(concepts) + len(resources)
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18
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External Collections
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====================
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The basis of our work will be ExternalCollection objects, i.e. concepts
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of the 'extcollection' type. We use an adapter for providing the attributes
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and methods of the external collect object.
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>>> from loops.concept import Concept
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>>> from loops.setup import addObject
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>>> from loops.integrator.collection import ExternalCollectionAdapter
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>>> tExternalCollection = concepts['extcollection']
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>>> coll01 = addObject(concepts, Concept, 'coll01',
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... title=u'Collection One', type=tExternalCollection)
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>>> aColl01 = ExternalCollectionAdapter(coll01)
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An external collection carries a set of attributes that control the access
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to the external system:
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>>> aColl01.providerName, aColl01.baseAddress, aColl01.address, aColl01.pattern
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(None, None, None, None)
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>>> from loops.integrator.testsetup import dataDir
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>>> aColl01.baseAddress = dataDir
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>>> aColl01.address = 'topics'
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Directory Collection Provider
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-----------------------------
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The DirectoryCollectionProvider collects files from a directory in the
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file system. The parameters (directory paths) are provided by the calling
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object, the external collection itself.
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>>> from loops.integrator.collection import DirectoryCollectionProvider
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>>> dcp = DirectoryCollectionProvider()
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>>> sorted(dcp.collect(aColl01))
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['programming/BeautifulProgram.pdf', 'programming/zope/zope3.txt']
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If we provide a selective pattern we get only part of the files:
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>>> aColl01.pattern = r'.*\.txt'
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>>> sorted(dcp.collect(aColl01))
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['programming/zope/zope3.txt']
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Let's now create the corresponding resource objects.
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>>> aColl01.pattern = ''
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>>> addresses = dcp.collect(aColl01)
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>>> res = list(dcp.createExtFileObjects(aColl01, addresses))
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>>> len(sorted(r.__name__ for r in res))
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2
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>>> xf1 = res[0]
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>>> xf1.__name__
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u'programming/BeautifulProgram.pdf'
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Fin de partie
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=============
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>>> placefulTearDown()
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