identity-map | 易学教程

Is there a concurrency problem here? How to test it during development?

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问题 Scenario: There exists 'n' teams who each work on their virtual 'wall' (like facebook's wall). Each team sees only their own wall and the posts on it. The posts can be edited by the author of the post or another team member (if so configured. Assuming this is indeed the case since it's a must have). Design/technology decisions: RESTful web-app using Restlet+ Glassfish/Java + Mysql (EDIT: Using Apache DBUtils for DB access. No ORM - seemed an overkill) Question: Multiple teams log on T1, T2

sqlalchemy identity map question

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问题 The identity map and unit of work patterns are part of the reasons sqlalchemy is much more attractive than django.db. However, I am not sure how the identity map would work, or if it works when an application is configured as wsgi and the orm is accessed directly through api calls, instead of a shared service. I would imagine that apache would create a new thread with its own python instance for each request. Each instance would therefore have their own instance of the sqlalchemy classes and

Rails 3.1 Identity Map issues?

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Does anyone know the key issues that the Rails 3.1 IdentityMap feature has that has forced the feature to be disabled by default? I'm sure that there are minor specific issues, but are there any major issues that anyone should be aware of before enabling it for an already built Rails 3.1 application? When you look at the documentation the main issue raised is that objects managed in the Identity Map can not handle associations yet, so it's not quite ready for real world usage right now. The documentation states clearly that the feature is still under development, so no one should really be

Rails 3.1 Identity Map issues?

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问题 Does anyone know the key issues that the Rails 3.1 IdentityMap feature has that has forced the feature to be disabled by default? I'm sure that there are minor specific issues, but are there any major issues that anyone should be aware of before enabling it for an already built Rails 3.1 application? 回答1: When you look at the documentation the main issue raised is that objects managed in the Identity Map can not handle associations yet, so it's not quite ready for real world usage right now.