May 2008 - Zope - Zope lists

first attempt to use RELSTORAGE
by David Bear 11 May '08

11 May '08

I installed relstorage using the instructions for easy_setup, i.e. 'easy_install RelStorage'. I realized as I read through more of the instructions that this likely put the relstorage modules in my python home rather than in my zope software home. I don't know if this would have caused the error I am seeing. However, after reading more through the instructions, and watching easy_install do its magic, I reached a point where I make a new zope instance, then when in to that instance home and modified the zope.conf to use relstorage instead of filestorage, I was ready to start my new instance. I was disappointed to have a traceback just running zopectl. I ran $INSTANCE_HOME/bin/zopectl and got the following traceback: Traceback (most recent call last): File "/servers/webenv1/lib/python/Zope2/Startup/zopectl.py", line 329, in ? main() File "/servers/webenv1/lib/python/Zope2/Startup/zopectl.py", line 287, in main options.realize(args) File "/servers/webenv1/lib/python/Zope2/Startup/zopectl.py", line 95, in realize ZDOptions.realize(self, *args, **kw) File "/servers/webenv1/lib/python2.4/site-packages/zdaemon-2.0.2-py2.4.egg/zdaemon/zdoptions.py", line 279, in realize self.load_schema() File "/servers/webenv1/lib/python2.4/site-packages/zdaemon-2.0.2-py2.4.egg/zdaemon/zdoptions.py", line 327, in load_schema self.schema = ZConfig.loadSchema(self.schemafile) File "/servers/webenv1/lib/python2.4/site-packages/ZConfig-2.5.1-py2.4.egg/ZConfig/loader.py", line 32, in loadSchema return SchemaLoader().loadURL(url) File "/servers/webenv1/lib/python2.4/site-packages/ZConfig-2.5.1-py2.4.egg/ZConfig/loader.py", line 66, in loadURL return self.loadResource(r) File "/servers/webenv1/lib/python2.4/site-packages/ZConfig-2.5.1-py2.4.egg/ZConfig/loader.py", line 187, in loadResource schema = ZConfig.schema.parseResource(resource, self) File "/servers/webenv1/lib/python2.4/site-packages/ZConfig-2.5.1-py2.4.egg/ZConfig/schema.py", line 27, in parseResource xml.sax.parse(resource.file, parser) File "/servers/webenv1//lib/python2.4/xml/sax/__init__.py", line 33, in parse parser.parse(source) File "/servers/webenv1//lib/python2.4/xml/sax/expatreader.py", line 107, in parse xmlreader.IncrementalParser.parse(self, source) File "/servers/webenv1//lib/python2.4/xml/sax/xmlreader.py", line 123, in parse self.feed(buffer) File "/servers/webenv1//lib/python2.4/xml/sax/expatreader.py", line 207, in feed self._parser.Parse(data, isFinal) File "/servers/webenv1//lib/python2.4/xml/sax/expatreader.py", line 300, in start_element self._cont_handler.startElement(name, AttributesImpl(attrs)) File "/servers/webenv1/lib/python2.4/site-packages/ZConfig-2.5.1-py2.4.egg/ZConfig/schema.py", line 99, in startElement getattr(self, "start_" + name)(attrs) File "/servers/webenv1/lib/python2.4/site-packages/ZConfig-2.5.1-py2.4.egg/ZConfig/schema.py", line 475, in start_schema keytype, valuetype, datatype = self.get_sect_typeinfo(attrs) File "/servers/webenv1/lib/python2.4/site-packages/ZConfig-2.5.1-py2.4.egg/ZConfig/schema.py", line 201, in get_sect_typeinfo datatype = self.get_datatype(attrs, "datatype", "null", base) File "/servers/webenv1/lib/python2.4/site-packages/ZConfig-2.5.1-py2.4.egg/ZConfig/schema.py", line 194, in get_datatype return self._registry.get(dtname) File "/servers/webenv1/lib/python2.4/site-packages/ZConfig-2.5.1-py2.4.egg/ZConfig/datatypes.py", line 398, in get t = self.search(name) File "/servers/webenv1/lib/python2.4/site-packages/ZConfig-2.5.1-py2.4.egg/ZConfig/datatypes.py", line 423, in search package = __import__(n, g, g, component) File "/servers/webenv1/lib/python/Zope2/Startup/datatypes.py", line 21, in ? import OFS.Uninstalled File "/servers/webenv1/lib/python/OFS/Uninstalled.py", line 20, in ? import SimpleItem, Globals, Acquisition File "/servers/webenv1/lib/python/OFS/SimpleItem.py", line 26, in ? import AccessControl.Role, AccessControl.Owned, App.Common File "/servers/webenv1/lib/python/AccessControl/__init__.py", line 17, in ? from Implementation import setImplementation File "/servers/webenv1/lib/python/AccessControl/Implementation.py", line 98, in ? setImplementation("C") File "/servers/webenv1/lib/python/AccessControl/Implementation.py", line 51, in setImplementation from AccessControl import ImplC as impl File "/servers/webenv1/lib/python/AccessControl/ImplC.py", line 18, in ? from cAccessControl import rolesForPermissionOn, \ File "/servers/webenv1/lib/python/AccessControl/SimpleObjectPolicies.py", line 82, in ? from DocumentTemplate.DT_Util import TemplateDict File "/servers/webenv1/lib/python/DocumentTemplate/__init__.py", line 21, in ? from DocumentTemplate import String, File, HTML, HTMLDefault, HTMLFile File "/servers/webenv1/lib/python/DocumentTemplate/DocumentTemplate.py", line 112, in ? from DT_String import String, File File "/servers/webenv1/lib/python/DocumentTemplate/DT_String.py", line 19, in ? from DT_Util import ParseError, InstanceDict, TemplateDict, render_blocks, str File "/servers/webenv1/lib/python/DocumentTemplate/DT_Util.py", line 67, in ? from ZPublisher.TaintedString import TaintedString File "/servers/webenv1/lib/python/ZPublisher/__init__.py", line 24, in ? from Publish import publish_module, Retry File "/servers/webenv1/lib/python/ZPublisher/Publish.py", line 24, in ? from zope.app.publication.browser import setDefaultSkin File "/servers/webenv1/lib/python/zope/app/publication/browser.py", line 33, in ? from zope.app.publication.http import BaseHTTPPublication File "/servers/webenv1/lib/python/zope/app/publication/http.py", line 27, in ? from zope.app.publication.zopepublication import ZopePublication File "/servers/webenv1/lib/python/zope/app/publication/zopepublication.py", line 46, in ? from zope.app.security.principalregistry import principalRegistry as prin_reg File "/servers/webenv1/lib/python/zope/app/security/principalregistry.py", line 20, in ? from zope.app.authentication.interfaces import IPasswordManager File "/servers/webenv1/lib/python/zope/app/authentication/__init__.py", line 20, in ? from zope.app.authentication.authentication import PluggableAuthentication File "/servers/webenv1/lib/python/zope/app/authentication/authentication.py", line 25, in ? from zope.app.component.site import SiteManagementFolder File "/servers/webenv1/lib/python/zope/app/component/site.py", line 35, in ? from zope.app.component import adapter File "/servers/webenv1/lib/python/zope/app/component/adapter.py", line 28, in ? class LocalSurrogate(zope.interface.adapter.Surrogate): AttributeError: 'module' object has no attribute 'Surrogate' for more information, there is another zope instance running on this machine however there is only 1 zope_home. Furthermore, what I couldn't discern from the install instructions for relstorage was configuration for postgresql. Since the instructions were silent, I assumed I at least needed a pg user for zope to connect as, and a database to contain the zodb. So I created these in pg so the dsn in zope.conf would at least have something valid to connect to. Any adivce? I think I will need to back out of what easy_install did to my pythonhome -- is there an easy way to undo what easy_install did ? -- David Bear College of Public Programs at ASU 602-464-0424

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disappearing external methods
by Garry Saddington 10 May '08

10 May '08

I have recently moved our Zope installation over to a centos server. Since the move all the external methods periodically stop working for no apparent reason and the error is returned as: "external method can not be called because it is none" The thing is that it works well and then stops. Does anyone have any ideas about this? The installation was not initially compiled on centos as I have a large collection of software as part of the application which can be moved between servers with the Zope installation. The reason for the move to Centos is that DTMLTex fails when trying to run pdflatex on Ubuntu and this seems to be distro specific, with no apparent way to fix it, unless anyone knows any better? Kind Regards Garry

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Turning back system clock
by Sinang, Danny 10 May '08

10 May '08

Dear All, The system clock of our Zope 2.7 machine accidentally got set to 2009. We noticed this mistake 6 hours later and we decided to set back the clock to 2008. How does this affect the integrity of Data.fs ? >From our observation : 1. Session write errors suddenly began to appear 2. Data.fs.index won't grow anymore and its timestamp remained at the time we set back the clock 3. Packing the database (which was 8 GB at the time) took too long without any signs of any Data.fs.pack file in the var folder. We decided to restart Zope after a few minutes. 4. There seem to be some catalog indexing problems as our catalog searches on a certain field doesn't work as reliably as it did before. We tried reindexing the field and even the catalog, but it timed out on us (lots of objects in the database). Has anyone here had any similar experiences ? How do I go about fixing this ? Using repozo.py last night, I made a full backup of Data.fs, copied it to a new instance, was able to create a new Data.fs.index, and eventually succeeded in packing the 8 GB database to just 2.4 GB. But it took quite a while - like 10 or 15 minutes before any Data.fs.pack appeared. I haven't checked yet if the catalog indexing problem has gone away. Regards, Danny

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Job opening: Malaria Atlas Project, Oxford University
by Anand Patil 09 May '08

09 May '08

DEPARTMENT OF ZOOLOGY Web developer Grade 7: Salary range:£26,666 - £32,796 Three year post A web developer is required to join the Malaria Atlas Project (MAP, http://www.map.ox.ac.uk) The job will be to lead in the improvement of the on-line presence and thus public engagement activities of MAP. Specific responsibilities will be to implement an online database of epidemiological information for MAP members and ultimately the wider malaria public health community. The successful candidate will also be required to develop the website functionality to display MAP products through Google Maps and Google Earth. It will be necessary to demonstrate a portfolio of skills and existing project experience in these areas. Further particulars can be downloaded from http://www.zoo.ox.ac.uk/jobs/current vacancies or are available from the Personnel Office, Department of Zoology, Tinbergen Building, South Parks Road, Oxford OX1 3PS. E-mail; recruit(a)zoo.ox.ac.uk. Applications, including curriculum vitae, giving contact details of three referees should be sent to the above address, quoting reference AT08016. The closing date for applications is 06 June 2008.

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Making Zope stop storing old object versions
by Sinang, Danny 09 May '08

09 May '08

Hello, We've got lots of Catalog reads and writes and our Data.fs is growing at an immense rate. Is there a way we can tell Zope to stop storing old object versions to limit the growth and not have to pack that often ? Regards, Danny

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Question about adapters
by Martijn Jacobs 09 May '08

09 May '08

Hello guys. A question about adapters : I've written two adapters wich implement my own interface IMyAdapter. The first adapter adapts CMFCore.interfaces._content.IFolderish objects and the other one CMFCore.interfaces._content.IContentish objects. One of the base classes of the IFolderish objects also implement the IContentish interface, so when I adapt folderish objects with IMyAdapter(object), the adapter registered for the IContentish objects always "wins". (and if it's a folderish object I want the adapter for IFolderish to jump in). In other words : How can I influence the order of adapter lookup? I'm feeling there should be a simple solution for this (applying a marker interface to folderish objects?), so I hope someone can point me in the right direction. Kind regards, Martijn. -- Martijn Jacobs Four Digits, Internet Solutions a: Willemsplein 15-1 6811 KB Arnhem NL kvk: 091621370000 | btw: 8161.22.234.B01 e-mail: martijn(a)fourdigits.nl | web: http://www.fourdigits.nl tel: +31 (0)26 44 22 700 | fax: +31 (0)84 22 06 117

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zope 2 wiki updated
by Simon Michael 09 May '08

09 May '08

Good day all.. http://wiki.zope.org/zope2 has just received a pretty major cleanup (I can tell by my inbox, this was about a 400-er.) Your critique, help and improvements are welcome. Best - Simon

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How to stop packing ?
by Sinang, Danny 06 May '08

06 May '08

Hi All, Is it possible to stop an ongoing ZODB packing operation without restarting Zope ? Am using Zope 2.7.6-final. - Danny

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Zope threads and the GIL
by Manuel Vazquez Acosta 06 May '08

06 May '08

Hi all, How does the GIL affect Zope threads? Best regards, Manuel.

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Add Combo Box in External method page
by vaibhav pol 05 May '08

05 May '08

Dear All , I want to modify the ExternalMethod dtml page which cames in zope i have to add combobox into the external method i go into the zopehome/lib/python/Products/ExternalMethod/dtml where i get the dtml page methodAdd.dtml i add combo box this dtml page is call in ExternalMethod.py how can i modifed that is it i have to create a object for the combobox . Let me no if you havingsome information. Thanks and Regards Vaibhav Pol

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