The Book of Zope
Zope, an open-source application server, has become an increasingly popular choice for web development in the last few years. Zope Corporation, formerly known as Digital Creations, has gone to great lengths to prove their commitment to the Open Source community and has encouraged Python and Zope developers around the world to spread the Zope gospel. The fact that Zope is written mainly in Python has given a boost to the worldwide Python community, providing what may indeed be the “killer app” that brings new people into the Python fold.
While Zope is an extremely powerful system for creating web applications, it also can be daunting to new users. Its paradigms are quite different from other web development systems, in no small part because of its heavy reliance on objects. If you are not comfortable with classes, instances, instance variables, class methods and instance methods, the learning curve for Zope is even steeper than otherwise would be the case.
While the Zope documentation has improved considerably over the last few years, and while many zope.org members have contributed their own documentation, tips, code and tutorials, there is still a need for solid introductory texts for learning Zope.
The Book of Zope aims to fill this niche. It was written by a number of programmers at Beehive, a web development company with offices in Berlin and Washington, DC. The book is an English translation of the original German version and reads better than I expected for a translation.
The Book of Zope covers most of what a beginning Zope developer will need to know. (While some of the chapters may be useful for designers and other nontechnical people, nonprogrammers probably will have a difficult time understanding many of the items in it.) Initial chapters describe how to navigate Zope's management screens, DTML (the server-side programming language that can be used to implement functionality without having to write Python programs) and permissions with users and roles.
The book then begins to cover more complex ground, describing ZClasses, SQL connectivity and Python scripts. There is even a chapter on Zope products, introducing the notion of a product and how to write one of your own in Python.
The Book of Zope covers everything that you might expect in a book of this type and does so thoroughly. But as I was reading it, I felt that something was missing: a sense of perspective, helping the fledgling Zope programmer to get “Zope Zen”, an intuitive sense for how Zope works. The book's text was informative, and its numerous examples were clear, but I wish that there had been more pauses to explain where each technology fits into the scheme of things, rather than simply introducing them.
The Book of Zope is a good complement to on-line Zope documentation and probably will be most useful to programmers who want more direction after experimenting with Zope on their own. Someone who is completely new to Zope might benefit from this book, but they may find themselves confused and frustrated.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
Join Linux Journal's Mike Diehl and Pat Cameron of Help Systems.
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With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide