Adept Blog Readers Google Group

[Adept Software Development] appengine service for google maps/earth (kml)

paul.marrington....@gmail.com (Paul Marrington) — Mon, 16 Nov 2009 01:05:00 UT

This example is called TripKML. It reads pre-recorded GeoPt records and
generates KML for Google Maps/Earth. The basic webapp is as normal:

class TripKML(webapp.RequestHandler) : def get(self): try: ... except
DeadlineExceededError: self.response.clear()
self.response.set_status(500) self.message("This operation could not be

[Adept Software Development] Refactor Heaven

paul.marrington....@gmail.com (Paul Marrington) — Sun, 13 Sep 2009 22:28:53 UT

[[link]]
One of the reasons I considered creating Trogger (The Travel Log) is
that it has a lot of common functionality with Golf Adept - for both
the mobile application and the server side. Modern development thinking
is that we should not write code that is not needed. With modern
refactoring IDEs this is now not only possible but a pleasure. Look at

[Adept Development System] User Management

paul.marrington....@gmail.com (Paul Marrington) — Tue, 04 Sep 2007 04:16:04 UT

I am using Adept Bookings as a proof-of-concept system for the Adept
Development System. The first thing that became immediately obvious was
that now it is time to implement user management. Authentication Adept
user management provides authorisation, not full authentication. So,
let's start with talking authentication. Authentication is to stop

[Adept Open Source Library] User Management

paul.marrington....@gmail.com (Paul Marrington) — Fri, 31 Aug 2007 02:53:49 UT

Adept is a browser-based system. As such it is inherently multi-user.
With more than one operator, the need for user management becomes
manifest. The Adept Library provides this support with a User object -
a persistent DAO. The User object contains a name and password for
authentication. Authentication is not enough. Any system that needs

[Adept Software Development] Disk Caches and Notebooks

paul.marrington....@gmail.com (Paul Marrington) — Mon, 27 Aug 2007 06:53:34 UT

Now that I am working in a research job again I will be reviving my
blogging. As Software Manager I just did not have time or enough excess
energy. While I am thinking up a list of topics I will start off with a
complaint session. With the new contract I bought a Macbook Pro with
wireless broadband so I could access things like Safari Books Online

[Adept Open Source Library] Time Sensitive Caches

pa...@askowl.com.au (Paul Marrington) — Mon, 26 Sep 2005 03:29:31 UT

Nothing is forever. If you have a program that is short-lived compared to the mean time between change of the data being cached, then a LRU cache will be more than adequate. If the program is an application server and could be left running for days, weeks or even months - then there's a good chance that the data being cached will need to be changed. Enter the time sensitive cache.

[Adept Software Development] JavaScript Events - Part 4 - Event Library Source

pa...@askowl.com.au (Paul Marrington) — Tue, 20 Sep 2005 08:29:42 UT

As promised, here it is. Refer to the earlier articles if you want to know the hows and whys.

/*
* Created on 5/11/4
*
* Copyright 2004 Paul Marrington
* All rights reserved - [link]
* PROPRIETARY/CONFIDENTIAL
* Use is subject to license terms - p...@marrington.net

[Adept Software Development] JavaScript Events - Part 3 - An Event Library

pa...@askowl.com.au (Paul Marrington) — Tue, 13 Sep 2005 06:54:18 UT

My first attempt at an event library allowed a single event to be attached to multiple elements, as well as multiple event methods to a single event on a single element. This is very useful when you want to track the mouse since you need to register the same even for multiple windows or frames. However, it did require the creation of a special event object and then to have that object attached. Consequently - except for the special mouse tracking case - most of my events were set in the time honoured way:

[Adept Software Development] JavaScript Events - Part 2 - The Event Object

pa...@askowl.com.au (Paul Marrington) — Mon, 05 Sep 2005 00:51:21 UT

I've no intention to describe the event object in detail. After all, the subject could easily fill a book (and it has). Given the depth to which I use this object, I will describe the browser differences I've found and how I've overcome them.

Retrieving The Event Object

In Mozilla the event object is passed to the event function as the one and only parameter. IE, however, has a nasty global variable called event. Does that make IE single threaded? Probably. I don't want to even think of the havoc multiple threads running the same Java code would cause. I think Mozilla must handle it. I can set a breakpoint in an event manager and have setTimeout() JavaScript trigger while still stopped in the debugger.

[Adept Open Source Library] The LRU Cache

pa...@askowl.com.au (Paul Marrington) — Wed, 31 Aug 2005 06:07:15 UT

In truth, all caches created using the Cache class are LRU caches. If you need to use the other caching properties without restricting the number of elements, give it a huge size or use the default constructor.

// Once 50 elements are cached the least recently accessed will be discarded.
Cache cache = new Cache( 50);

[Adept Software Development] JavaScript Events - Part 1 - Setting Events

pa...@askowl.com.au (Paul Marrington) — Mon, 29 Aug 2005 05:09:50 UT

This is part 1 of a 3 part series.
* Part 1: Setting Events
* Part 2: The Event Object.
* Part 3: A General Usable Event Manager.

I've just refactored the JavaScript events system for Adept. I initially chose to implement the menu system by generating HTML rather than by building objects. Bad choice. It highlighted the operational inconsistencies between 3 completely different ways to add an event to an element.

[Adept Software Development] Coding Standards and Breaking the Rules - Part 3, Exceptions

pa...@askowl.com.au (Paul Marrington) — Wed, 24 Aug 2005 06:47:44 UT

While we are talking about going overboard while following a standard, let's talk about exceptions. Exceptions were introduced late into the C++ standard and so for many years were virtually ignored. Existing code had other mechanisms, libraries did not use them and few developers understood them. Java was developed after that. The development team decided to implement and use (or dare I say overuse) exceptions.

[Adept Open Source Library] Caching - a Commonly Used Optimisation Method

pa...@askowl.com.au (Paul Marrington) — Wed, 10 Aug 2005 07:15:24 UT

Every enterprise level application implements caching somewhere. Even loading static class-level fields when the class is first loaded is a form of caching.

The Adept Library Cache class is designed to implement pools, time sensitive and least recently used caches. Since each of these similar structures are used for completely different purposes, they are the subject of an article each. In summary:

[Adept Development System] The Static Active Tree

pa...@askowl.com.au (Paul Marrington) — Mon, 08 Aug 2005 07:55:15 UT

The reason for the unusual title is because I've created the visual tree code for Adept. The first use is in the options system. I've chosen the large-input method of tree on left and panels on right favoured by X-Windows over the panel-and-tab approach that Windows programs enjoy. It provides for a much richer selection set - but looks rather silly when there are only a few panels. The options system will be the subject of another article later (when this feature is ready).

[Adept Software Development] Coding Standards and Breaking the Rules - Part 2, Beans

pa...@askowl.com.au (Paul Marrington) — Mon, 01 Aug 2005 06:32:13 UT

Standardisation isn't just about styles. Very soon after the advent of Java, Sun introduced the concept of the bean. The original idea was to define components in Java. A component is a reusable building block. In its purest form you should not know or care even which computer a bean is running on.