So Jason and I were discussing death, as we sometimes do. In particular, what to have engraved1 on our tombstones (assuming we get so lucky!)
"I told you I was ill" -- Spike Milligan
This quickly degenerated to the OO software-designer specific:
"I've been finalized..."
"I've been Garbage Collected."
"Finally, I've been taken up to the PermGen space!"
...all depends on your spiritual views, I suppose...
[1] I it just a coincidence that tombstones get engraved? Probably not.
03 February 2010
23 January 2010
Boolean Illogic
Why do Java programmers hate the boolean XOR operator?
Is it that they are just generally ignorant about the full-eval boolean operators in general? You know, the operators that look like &, | and ^. Perhaps its that most Java developers are under the impression that they only operate on bits, an are ignorant of the fact that they operate on booleans (and Booleans with that fucking horrible autoboxing/unboxing nonsense.)
I know that 99 time out of 100 we prefer the early-out operators && and || for their efficiency, but a simple ^ can save a hell of a lot of unreadable and less-understandable if-then-else logic. For example, I've just refactored (somebody else's code)
Is it that they are just generally ignorant about the full-eval boolean operators in general? You know, the operators that look like &, | and ^. Perhaps its that most Java developers are under the impression that they only operate on bits, an are ignorant of the fact that they operate on booleans (and Booleans with that fucking horrible autoboxing/unboxing nonsense.)
I know that 99 time out of 100 we prefer the early-out operators && and || for their efficiency, but a simple ^ can save a hell of a lot of unreadable and less-understandable if-then-else logic. For example, I've just refactored (somebody else's code)
if( check ){which I find nasty as hell to be sure is doing what it's supposed to, into
if( !user.isAnonymousUser() ) doStuff();
}else{
if( user.isAnonymousUser() ) doStuff();
}
if( check ^ user.isAnonymouseUser() ) doStuff();Much easier to understand, no?
10 January 2010
How Do Development Managers Screw Up?
Here's a question, much on my mind:
What is the single most important thing that Development Managers do, or fail to do, or pay insufficient attention to, that create a friction in the delivery of working software?
Answers in comments (or email if you don't want to publicly reveal details) please!
By "Development Manager" I don't just mean those people who have those words in their job title, but I mean any person who is responsible for tasking development teams - large or small - and ensuring the delivery of software systems by their developers. Sometimes they are called Project Managers, sometimes - in small entrepreneurial startups - they are the Boss Of The Whole Gig. The point is that they are the interface between the business stakeholders and the technical people who do the development and implementation work.
What is the single most important thing that Development Managers do, or fail to do, or pay insufficient attention to, that create a friction in the delivery of working software?
Answers in comments (or email if you don't want to publicly reveal details) please!
By "Development Manager" I don't just mean those people who have those words in their job title, but I mean any person who is responsible for tasking development teams - large or small - and ensuring the delivery of software systems by their developers. Sometimes they are called Project Managers, sometimes - in small entrepreneurial startups - they are the Boss Of The Whole Gig. The point is that they are the interface between the business stakeholders and the technical people who do the development and implementation work.
06 January 2010
New Courses Scheduled
Courses newly scheduled:
Please contact me directly if you're interested. Places are limited, especially for the Design Patterns course.
More to come soon... if you're interested, I suggest that you keep track of my course schedule page feed (the feed-link is near the top-right), or course-schedule calendar in your feed-reader.
- Patterns of OO Design, 17-19 Feb in Cape Town
- OO Technology Overview for Managers, 22 Feb, Cape Town.
Please contact me directly if you're interested. Places are limited, especially for the Design Patterns course.
More to come soon... if you're interested, I suggest that you keep track of my course schedule page feed (the feed-link is near the top-right), or course-schedule calendar in your feed-reader.
27 December 2009
Flightwish Reboot
Restarted working on Flightwish today. A lot of background stuff... seeing that the DNS is correctly set up for all the FW domains... getting Subversion properly configured on the dev server... restoring the old FW software trove... all the dirty little details of permissions, software configuration and setup that don't usually get mentioned in software development plans, but eat into your time in such a big way.
I've installed the Pebble blog engine on the server, and I have to say it looks pretty nice. Far more impressive than the Blojsom engine that I'm still using for my personal blogs. Simpler to use and customise, and performance feels somehow snappier. The only real snag I hit is that Pebble is supposedly able to interpret WikiCreole - not my wiki syntax of choice, but better than no wiki syntax at all! - only it doesn't seem to work. At least I couldn't make it work. Well, it was pretty late in the day, so maybe my brain has simply had enough for the day.
My idea is to first just get a Flightwish blog up and running so that I can get some content up on the site, and update it reasonably regularly so as to improve its pagerank. I was a bit surprised to see, though, that despite having only reactivated the flightwish.com site a few days ago, its pagerank is 3. Not bad for a dead site! I guess it must be because it has been a real site in the past, and also due to its age (several years.)
After that my next priority will be to get a forum system up and running and looking reasonable so that people can start to sign up and chat. Yes, it would seem to be Yet Another Social Networking Website. Hopefully we'll have enough of a real focus to make it a bit different. The idea is (as it always has been) to do something in the travel space, with a strongly social slant.
As soon as the forum is set up I'll focus on writing a bunch of content - to be released at several-day intervals - telling the stories that drive/drove the initial concept of Flightwish. Those stories (you'll have to subscribe to the Flightwish Blog and wait a few days if you're interested - there's no content there yet) will explain the shape of the Heart of Flightwish as it exists in my head. I'll probably also reminisce about some of the experiences we've had with this thing in years past... the long, long road we've travelled to get here.
Lots of work for a one-man-band! But I think we can do something really interesting, different and meaningful in the travel space. Certainly I'd love to visit Bolivia, Peru, Guatemala, Mexico, Belgium (for the beer) and loads of other places, but I don't think I can do it without a bunch of help!
I've installed the Pebble blog engine on the server, and I have to say it looks pretty nice. Far more impressive than the Blojsom engine that I'm still using for my personal blogs. Simpler to use and customise, and performance feels somehow snappier. The only real snag I hit is that Pebble is supposedly able to interpret WikiCreole - not my wiki syntax of choice, but better than no wiki syntax at all! - only it doesn't seem to work. At least I couldn't make it work. Well, it was pretty late in the day, so maybe my brain has simply had enough for the day.
My idea is to first just get a Flightwish blog up and running so that I can get some content up on the site, and update it reasonably regularly so as to improve its pagerank. I was a bit surprised to see, though, that despite having only reactivated the flightwish.com site a few days ago, its pagerank is 3. Not bad for a dead site! I guess it must be because it has been a real site in the past, and also due to its age (several years.)
After that my next priority will be to get a forum system up and running and looking reasonable so that people can start to sign up and chat. Yes, it would seem to be Yet Another Social Networking Website. Hopefully we'll have enough of a real focus to make it a bit different. The idea is (as it always has been) to do something in the travel space, with a strongly social slant.
As soon as the forum is set up I'll focus on writing a bunch of content - to be released at several-day intervals - telling the stories that drive/drove the initial concept of Flightwish. Those stories (you'll have to subscribe to the Flightwish Blog and wait a few days if you're interested - there's no content there yet) will explain the shape of the Heart of Flightwish as it exists in my head. I'll probably also reminisce about some of the experiences we've had with this thing in years past... the long, long road we've travelled to get here.
Lots of work for a one-man-band! But I think we can do something really interesting, different and meaningful in the travel space. Certainly I'd love to visit Bolivia, Peru, Guatemala, Mexico, Belgium (for the beer) and loads of other places, but I don't think I can do it without a bunch of help!
17 December 2009
Well done, Jason!
Congratulations to Jason on becoming the first family-member to get published:
Implement Automatic Discovery in Your Java Code with Annotations — Developer.com
10 September 2009
Network Disasters Happen in Threes Fours
Only 9 more sleeps to go...
Strike 1: Last week, disaster struck in the form of a 2-day DSL outage. Telkom -- my current DSL provider -- blithely went and cleared the fault ticket after 24hours -- without any consultation with me -- because their test centre said that my router was getting a connection to the local exchange. The ticket comment was, "Fault closed at customer request." Liars!
Much wailing and gnashing of teeth later, they discovered that a whole lot of people in the area were experiencing the same problems: very sporadic connectivity with almost no traffic getting through. Turned out to be a fault on the exchange itself.
Strike 2: On the same day that this problem started, my London-housed server went down for Reasons Unknown. Of course I was blissfully unaware of it until Friday. 2 days of server outage. Then my service provider there was terribly slow to rectify the problem (which -- as the universe will insist upon -- involved a fractal nesting of sub-problems with their own sub-sub-problems ad mandelbrot.) As I write, the server is still only partially up. Apache service -- the one my paying customers rely on -- is up and working fine on one IP address, but Tomcat, hosting my personal and "corporate" sites, blogs and wikis still cannot talk through the other IP address. The service I get from VAServ is pretty kak, but not so kak as to be noteworthy -- they really are giving me a very low-cost package, and, as always, You Gets What You Pays For.
Strike 3: At the same time an FTP backup service I use for offsite backups refused to authenticate me, using the same credentials I've been using for years, with the result that I could not even ensure the safety of all the data! Be Still, My Twitching Ulcer.
You're Out: Welcome to this morning, where we present -- for your entertainment and edification -- a reprise of last week's DSL outage. Telkom, predictably, and once again, are in complete denial that there is actually a problem. Their tests show a solid connection between my router and their exchange. No shit, Sherlock! Pity the bits can't squeeze through the tiny opening.
I've always been very happy with the ISP service I've received from WebAfrica, and have, over the years, put many friends and colleagues onto them, not one of whom has had anything less than Sterling service. I've asked WA to take over my DSL service1, too, in light of recent events. The only bit of business Telkom will be getting from me for the foreseeable future will be POTS.
Only 9 more sleeps to go...2
I think this sorry whining actually has a point; it tends to back up my long-held belief that telcos are constitutionally incapable of competently running IP services. The cultures and philosophies that make end-to-end controlled networks are unable to comprehend -- in some weirdly deep, DNA-level way -- how to cope with IP networks which have almost no intelligence in the middle, but live, instead, with all the intelligence at the edges.
People who run IP networks, on the other hand, are able to provide perfectly adequate voice services over IP, which is why they're going to eat the telcos' lunch over the long term.
[1] There's no transfer/installation fee. Their monthly rates are at present the same as Telkom's, and as they roll out their own infrastructure, they anticipate reducing the charges. Their support desk is outstanding, staffed by people who actually know stuff, don't mind admitting mistakes and problems, treat customers like Real Humans instead of problem-id's, and follow through on promises and commitments and ensuring that things get fixed. I can't see any downside, can you?
[2] Of course, it occurs to me a little late, that I'll only be able to actually post this when I get the server working properly again. Which will only happen when I get some reasonable connectivity back. Which might happen slightly after Lucifer goes skiing from his front doorstep.
Strike 1: Last week, disaster struck in the form of a 2-day DSL outage. Telkom -- my current DSL provider -- blithely went and cleared the fault ticket after 24hours -- without any consultation with me -- because their test centre said that my router was getting a connection to the local exchange. The ticket comment was, "Fault closed at customer request." Liars!
Much wailing and gnashing of teeth later, they discovered that a whole lot of people in the area were experiencing the same problems: very sporadic connectivity with almost no traffic getting through. Turned out to be a fault on the exchange itself.
Strike 2: On the same day that this problem started, my London-housed server went down for Reasons Unknown. Of course I was blissfully unaware of it until Friday. 2 days of server outage. Then my service provider there was terribly slow to rectify the problem (which -- as the universe will insist upon -- involved a fractal nesting of sub-problems with their own sub-sub-problems ad mandelbrot.) As I write, the server is still only partially up. Apache service -- the one my paying customers rely on -- is up and working fine on one IP address, but Tomcat, hosting my personal and "corporate" sites, blogs and wikis still cannot talk through the other IP address. The service I get from VAServ is pretty kak, but not so kak as to be noteworthy -- they really are giving me a very low-cost package, and, as always, You Gets What You Pays For.
Strike 3: At the same time an FTP backup service I use for offsite backups refused to authenticate me, using the same credentials I've been using for years, with the result that I could not even ensure the safety of all the data! Be Still, My Twitching Ulcer.
You're Out: Welcome to this morning, where we present -- for your entertainment and edification -- a reprise of last week's DSL outage. Telkom, predictably, and once again, are in complete denial that there is actually a problem. Their tests show a solid connection between my router and their exchange. No shit, Sherlock! Pity the bits can't squeeze through the tiny opening.
I've always been very happy with the ISP service I've received from WebAfrica, and have, over the years, put many friends and colleagues onto them, not one of whom has had anything less than Sterling service. I've asked WA to take over my DSL service1, too, in light of recent events. The only bit of business Telkom will be getting from me for the foreseeable future will be POTS.
Only 9 more sleeps to go...2
I think this sorry whining actually has a point; it tends to back up my long-held belief that telcos are constitutionally incapable of competently running IP services. The cultures and philosophies that make end-to-end controlled networks are unable to comprehend -- in some weirdly deep, DNA-level way -- how to cope with IP networks which have almost no intelligence in the middle, but live, instead, with all the intelligence at the edges.
People who run IP networks, on the other hand, are able to provide perfectly adequate voice services over IP, which is why they're going to eat the telcos' lunch over the long term.
[1] There's no transfer/installation fee. Their monthly rates are at present the same as Telkom's, and as they roll out their own infrastructure, they anticipate reducing the charges. Their support desk is outstanding, staffed by people who actually know stuff, don't mind admitting mistakes and problems, treat customers like Real Humans instead of problem-id's, and follow through on promises and commitments and ensuring that things get fixed. I can't see any downside, can you?
[2] Of course, it occurs to me a little late, that I'll only be able to actually post this when I get the server working properly again. Which will only happen when I get some reasonable connectivity back. Which might happen slightly after Lucifer goes skiing from his front doorstep.
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