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Send emails from shell script without local mailserver

- by devdude

How can I send email from a shellscript (usually cronjob) without running a mailserver on the same host. Using a smtp server. Running Ubuntu. I looked a t various tutorials, but couldnt find a suitable approach (simple and secure). Thanks Sven

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Create creative diagrams or find someone creative

- by devdude

This question might be slightly non-techy/dev, but I am sure many of you had a similar problem. We code, write test-cases, put comments in source-code (!), put messages in svn commit, write comments in tracked issues. We create ERD/class/usecase/.. diagrams with whatever tool. We might write user-manuals, wikis, guidelines,.. Not everyones cup of tea, but usually practice makes a good tech writer (I experienced that). Now comes the point: Once in a while we need to supply system overview diagrams, drawings of architecure,.. that look appealing to non-technical people, and no, we dont have a marketing department with designers waiting for our input or a $$$$ design company doing our corporate design. If I try to do that, it a) takes forever b) I might not have the tools and c) looks like crap and not like something I want to see in a slideshow. Whats your experience or recipe ? Is there something like RENT-A-DESIGNER ? cheers

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PhysX for massive performance via GPU ?

- by devdude

I recently compared some of the physics engine out there for simulation and game development. Some are free, some are opensource, some are commercial (1 is even very commercial $$$$). Havok, Ode, Newton (aka oxNewton), Bullet, PhysX and "raw" build-in physics in some 3D engines. At some stage I came to conclusion or question: Why should I use anything but NVidia PhysX if I can make use of its amazing performance (if I need it) due to GPU processing ? With future NVidia cards I can expect further improvement independent of the regular CPU generation steps. The SDK is free and it is available for Linux as well. Of course it is a bit of vendor lock-in and it is not opensource. Whats your view or experience ? If you would start right now with development, would you agree with the above ? cheers

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Internal and External Bug-Tracking Setup

- by devdude

Most of you certainly use some kind of bugtracker. Maybe internally only, once a customer files a bug via email or phone you add a new ticket by yourself. Sometimes weekly project meetings can be great source of new tickets coming preferably in flavors of excel sheets that the PM on the other side of the table loves to maintain and chase after you. The more advanced (and transparent) version: Allow the customer to file (and see the progress of) his bugs directly into you bugtracker. Systems like JIRA allow you to use profiles to have certain access rights, etc. But now the question: The bug raised by a user not necessary translates into 1 bug in a specific module/method/EJB/class. The version of the (your) web application he uses does not translate into the version of the class that is causing the error. How you maintain the internal part of the ticket with all the nasty techy details and the same time the make-the-user-feel-good ticket (need more info, accepted, in progress,..) ? Creating 2 tickets for internal and external ? Link them ? Any smart recipes to share ?

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Will Delphi be there in future ?

- by devdude

Yes, there is a version 2009. I know Delphi has a big community since years (10 plus)and I believe you could create native windows exe before Visual Basic got to speed (with all its dll's nighmare). But is it future-proof ? Is there a need or market for a non-crossplatform native all-in-one executable ? Will Embarcardero ex Codegear ex Borland continue to push it ? Why is it so expensive ? Who (non company) can afford it, in order to learn it ?

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What is the right license for tutorial source code ?

- by devdude

Putting sourcecode from tutorials or books online requires the author to add some kind of disclaimer or license (otherwise people would use it make lots of $$$ or break a power plant IT control system and sue you as author). But what is the right license or disclaimer statement ? Can I use BSD license with ... IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,... We are talking about tutorials ! Released to teach and share knowledge. Or do I need to follow the (potentially different) licenses of the libraries I use ? Might be insignificant now but I feel we will face a license hunt in "public" sourcecode (aka OSS) in future, similar to companies/lawyers currently crawling the web for pictures with wrong copyright statement or infringing their IP (and suing someone using a picture in a personal blog,etc..).

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Data-related security Implementation

- by devdude

Using Shiro we have a great security framework embedded in our enterprise application running on GF. You define users, roles, permissions and we can control at any fine-grain level if a user can access the application, a certain page or even click a specific button. Is there a recipe or pattern, that allows on top of that, to restrict a user from seeing certain data ? Sample: You have a customer table for 3 factories (part of one company). An admin user can see all customer records, but the user at the local factory must not see any customer data of other factories (for whatever reason). Te security feature should be part of the role definition. Thanks for any input and ideas

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Clustering and DB Replication in virtualized (and cloud) environments

- by devdude

Both replication and clustering are terms for servers setups with physical (real) servers, usually implemented on a DB or AS level. Now the question: In a virtualized environment with "easy" scalable servers (touching clustering) and a higher availability (DB replication) through the means of high availability of the virtual server by the cloudserver provider, do we really need replication and clustering (as in covering the problems of traditional servers) ? Question is asked from a soultion/application provider viewpoint. Please exclude the need of replication with a business requirement background, eg. the need to replicate a DB at 2 different geographical locations to ensure performance and data. Thanks for your insights !

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Import text file crunching library for Java/Groovy ?

- by devdude

In a lot of real life implementations of applications we face the requirement to import some kind of (text) files. Usually we would implement some (hardcoded?) logic to validate the file (eg. proper header, proper number of delimiters, proper date/time value,etc.). Eventually also need to check for the existence of related data in a table (eg. value of field 1 in text file must have an entry in some basic data table). While XML solves this (to some extend) with XSD and DTD, we end up hacking this again and again for proprietary text file formats. Is there any library or framework that allows the creation of templates similar to the xsd approach ? This would make it way more flexible to react on file format changes or implement new formats. Thanks for any hints Sven

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How to commit a non-subversioned file into a repository ?

- by devdude

The environment: SVN, Netbeans, Hudson SVN Project A: Builds a library file (foo.jar). The build file is under /dist, which is ignored for svn, the sourcecode is under svn control. SVN Project B: holds all library files. (other SVN projects get all their libraries from here via external svn) Question: I want to commit foo.jar from A into B. How to do that ? foo.jar cannot be added or committed because it is not under SVN control. Thanks for any hints ! (The question is independent from the IDE and CI Server)

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