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  • Is it worth it to switch from home-grown remote command interface to using JMX

    - by Sam Goldberg
    Without knowing too much about JMX, I've always assumed that it would be the best approach for building in remote management to our standalone Java server application. Our server application has some minimal remote control capability, using text commands sent via TCP/IP socket to it. Using the home grown approach, it is fairly to add a new command. (Just create new command text, and the code to handle that in the message receiver). On the other hand, we have hardly implemented any commands, even though there are many things we would like to be able to execute remotely. I am trying to weigh the value of moving to incorporating JMX (learning it, and building the interfaces), versus just sticking with the home-grown approach. Does anyone have any experience or advice regarding changing an existing application to use JMX?

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  • Switch Hosts With Gmail Account Attached

    - by Wade D Ouellet
    Hi, I am transferring a client from their old host to my new one. Their domain-based gmail/apps account was connected to their old host, so when I changed the domain's name servers to the new host, naturally the gmail account stopped working. So I added the 7 MX records tho the new host's DNS and verified I own the domain on the new host's FTP but the email still isn't working. Is there something I'm missing? I added the MX records to the new host about two hours ago, is it possible it just takes longer than that? Also, outgoing mail seems to work. Members of the domain can't receive email though, just sends back an error. Thanks, Wade

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  • Switch from encrypted partition to unencrypted (Error: cryptsetup: evms_activate is not available)

    - by Chris Lercher
    I initially installed Ubuntu 11.04 with an encrypted file system (from the alternate install CD: Guided Partitioning, LVM encrypted). Now I wanted to change this setup to have my root file system on an unencrypted partition. I had the following setup before: /dev/mapper/my-root on / type ext4 (rw,noatime,errors=remount-ro,commit=0,commit=0) /dev/sda1 on /boot type ext2 (rw,noatime) I backed up /, reformatted /dev/sda5 (which had contained the encrypted LVM device) to an ext3 partition, and restored / to that partition. I edited /etc/fstab, removed the line /dev/mapper/my-root / ..., and added the line: /dev/sda5 / ext3 noatime,rw,errors=remount-ro,commit=0 0 1 I edited /etc/crypttab, and commented out the single entry. On reboot, I get the grub screen as usual, but then I get the message cryptsetup:evms_activate is not available, waiting for encrypted source device. I tried reinstalling Grub2 using a LiveCD with the ChRoot method, but that didn't make any difference. Why is Ubuntu still searching for an encrypted device?

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  • Hyper-V extensible virtual switch disables network

    - by Sebastian Krysmanski
    I just installed the Hyper-V role on my Windows Server 2012. It comes with something called a "Hyper-V extensible virtual switch". I assigned it to the only network card in my server. By doing so, the network card became useless/disabled/inactive/.. because the virtual switch disabled all features (IPv4, IPv6, Client for Microsoft Networks, ...) on the network adapter. Is this supposed to happen? I admit I've no idea what this "extensible virtual switch" actually does. A short explanation would be nice as well.

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  • How to write your unit tests to switch between NUnit and MSTest

    - by Justin Jones
    On my current project I found it useful to use both NUnit and MsTest for unit testing. When using ReSharper for running unit tests, it just simply works better with NUnit, and on large scale projects NUnit tends to run faster. We would have just simply used NUnit for everything, but MSTest gave us a few bonuses out of the box that were hard to pass up. Namely code coverage (without having to shell out thousands of extra dollars for the privilege) and integrated tests into the build process. I’m one of those guys who wants the build to fail if the unit tests don’t pass. If they don’t pass, there’s no point in sending that build on to QA. So making the build work with MsTest is easiest if you just create a unit test project in your solution. This adds the right references and project type Guids in the project file so that everything just automagically just works. Then (using NuGet of course) you add in NUnit. At the top of your test file, remove the using statements that refer to MsTest and replace it with the following: #if NUNIT using NUnit.Framework; #else using TestFixture = Microsoft.VisualStudio.TestTools.UnitTesting.TestClassAttribute; using Test = Microsoft.VisualStudio.TestTools.UnitTesting.TestMethodAttribute; using TestFixtureSetUp = Microsoft.VisualStudio.TestTools.UnitTesting.TestInitializeAttribute; using SetUp = Microsoft.VisualStudio.TestTools.UnitTesting.TestInitializeAttribute; using Microsoft.VisualStudio.TestTools.UnitTesting; #endif Basically I’m taking the NUnit naming conventions, and redirecting them to MsTest. You can go the other way, of course. I only chose this direction because I had already written the tests as NUnit tests. NUnit and MsTest provide largely the same functionality with slightly differing class names. There’s few actual differences between then, and I have not run into them on this project so far. To run the tests as NUnit tests, simply open up the project properties tab and add the compiler directive NUNIT. Remove it, and you’re back in MsTest land.

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  • How to make the switch to C++11?

    - by Overv
    I've been programming in C++ for a while now, but mostly thinks centered around the low-level features of C++. By that I mean mostly working with pointers and raw arrays. I think this behavior is known as using C++ as C with classes despite me only having tried C recently for the first time. I was pleasantly surprised how languages like C# and Java hide these details away in convenient standard library classes like Dictionaries and Lists. I'm aware that the C++ standard library has many convenience containers like vectors, maps and strings as well and C++11 only adds to this by having std:: array and ranged loops. How do I best learn to make use of these modern language features and which are suitable for which moments? Is it correct that software engineering in C++ nowadays I'd mostly free of manual memory management? Lastly, which compiler should I use to make the most of the new standard? Visual Studio has excellent debugging tools, but even VS2012 seems to have terrible C++11 support.

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  • FCoE, on any Ethernet switch?

    - by javano
    I understand the concept of FCoE. I have looked at the Wikipedia page and looking at the layer 2 frame diagram, it looks like FCoE really should "just work" on any Ethernet switch, but is this really the case? If so, what do switches like Cisco's Nexus 5k or 6120P offer that normal switches don't (in specific relation to FCoE)? I am just using those two switches as examples. On the Nexus 5548UP page for example it says the following; Unified ports that support traditional Ethernet, Fibre Channel (FC),and Fibre Channel over Ethernet (FCoE) Well if FCoE runnins over regular Ethernet, that why does it support "Ethernet and Fibire Channel over Ethernet"? This is why I am curious as to weather FCoE will run on any Ethernet switch and these switches just support "bonus" features, or if you do indeed require a specialist switch. Thank you.

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  • Switch from back-end to front-end programming: I'm out of my comfort zone, should I switch back?

    - by ripper234
    I've been a backend developer for a long time, and I really swim in that field. C++/C#/Java, databases, NoSql, caching - I feel very much at ease around these platforms/concepts. In the past few years, I started to taste end-to-end web programming, and recently I decided to take a job offer in a front end team developing a large, complex product. I wanted to break out of my comfort zone and become more of an "all around developer". Problem is, I'm getting more and more convinced I don't like it. Things I like about backend programming, and missing in frontend stuff: More interesting problems - When I compare designing a server that handle massive data, to adding another form to a page or changing the validation logic, I find the former a lot more interesting. Refactoring refactoring refactoring - I am addicted to Visual Studio with Resharper, or IntelliJ. I feel very comfortable writing code as it goes without investing too much thought, because I know that with a few clicks I can refactor it into beautiful code. To my knowledge, this doesn't exist at all in javascript. Intellisense and navigation - I hate looking at a bunch of JS code without instantly being able to know what it does. In VS/IntelliJ I can summon the documentation, navigate to the code, climb up inheritance hiererchies ... life is sweet. Auto-completion - Just hit Ctrl-Space on an object to see what you can do with it. Easier to test - With almost any backend feature, I can use TDD to capture the requirements, see a bunch of failing tests, then implement, knowing that if the tests pass I did my job well. With frontend, while tests can help a bit, I find that most of the testing is still manual - fire up that browser and verify the site didn't break. I miss that feeling of "A green CI means everything is well with the world." Now, I've only seriously practiced frontend development for about two months now, so this might seem premature ... but I'm getting a nagging feeling that I should abandon this quest and return to my comfort zone, because, well, it's so comfy and fun. Another point worth mentioning in this context is that while I am learning some frontend tools, a lot of what I'm learning is our company's specific infrastructure, which I'm not sure will be very useful later on in my career. Any suggestions or tips? Do you think I should give frontend programming "a proper chance" of at least six to twelve months before calling it quits? Could all my pains be growing pains, and will they magically disappear as I get more experienced? Or is gaining this perspective is valuable enough, even if plan to do more "backend stuff" later on, that it's worth grinding my teeth and continuing with my learning?

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  • JavaOne 2012 - Why Should I Switch to Java SE 7

    - by sowmya
    At JavaOne 2012, David Keenan and Staffan Friberg gave a presentation to answer why it is beneficial to update your production environment to Java SE 7. The following resources will help you learn more about JDK 7 features and facilitate a smooth transition: * Features and Enhancements and Known Issues * Compatibility with earlier releases * JDK 7 and JRE 7 Certified System Configurations * JDK 7 and JRE 7 Supported Locales * JDK 7 Adoption Guide * Information About 7 Update Releases - Sowmya

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  • switch HDD in laptop

    - by jolly
    the internal hard drive that I have right now in my laptop is coming near its death, clicking for life, so I decided to buy a new HDD. However, I don't want to spend two weeks setting up my system to fit me as it does right now, so I thought that I can make just a hard copy of all the contents to the new disk (using dd). My question is: is it going to work? :-) What are the things that need to be changed, except fstab?

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  • Cascading KVM switches

    - by einpoklum
    I have a not-so-small number of computers (say, 5) which I want to access with a single keyboard, USB and monitor. I can get an 8-port KVM switch, which is a pretty expensive piece of hardware; however, in theory, I should be able to cascade KVM switches: Have one 4-port KVM switch between 2 other KVMs (a 2-port and a 4-port). Is this doable (with typical off-the-shelf switches and cables)? Has anyone had experience doing this? Note: I'm interested in USB-only for the keyboard and mouse, and either VGA or DVI for the display. Audio and PS/2 connections are irrelevant for me..

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  • Question: Why switch to Linux or a Mac?

    <b>Sure, It's Secure:</b> "I'm no friend to Windows. I know the operating system too well to trust it. But, I did think that even though Windows is defective by design, you could keep it relatively safe by installing patches quickly and using anti-virus software religiously. I was wrong."

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  • Cisco 2950 Express Setup

    - by adamtor45
    I've been donated a Cisco Catalyst 2950 Switch by the company I work for to have a play with. I've reset it back to Factory Defaults, but having an issue with getting to Express Setup. I've followed the Express Setup (And Factory Reset) guide as listed here: Catalyst 2950 Switch Getting Started Guide Everything goes fine, until I get to step 10, I enter 10.0.0.1 into the browser, but I just get a Error 324 response. ServerFault wouldn't let me post a picture, so here is a link to the browser screenshot: Does anyone have any suggestions as to what this may be? Thanks in advance!

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  • Windows 7 tasks don't switch when clicking window

    - by Jonathan Weinraub
    I got a peculiar problem with an enduser today. He says for the past month or so, if he has a window open (not maximised) and he clicks the window below it (also not maximised), it won't switch to it. For example, if he is in Lotus Notes, and wants to go back to Firefox, and he clicks the Firefox title bar, the tasks don't change focus/switch to it. This doesn't happen for applications. Usually it is with Firefox but if he's in Matlab and goes to PADS for example, they switch fine. If you close the apps, and reopen them, it'll work, but about 30 minutes later the weirdness then resumes. Any insight would be greatly appreciated. Thanks!

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  • Switch to switch encryption over a wireless bridge (TrustSec?)

    - by metatheorem
    I am planning to connect an existing Cisco 3750 switch to a 3560C switch over a wireless PTP bridge. The bridge will be WPA2 protected, but I am looking for an additional measure of security between the switches to prevent other wireless access through either switch. They do not support IPSec, only 802.1Q tunnels, and buying additional hardware is not likely an option. I am looking into using TrustSec manual mode between the switches. After some effort reading into TrustSec and MACsec, I am mostly certain this is a good choice over the wireless bridge, keeping in mind it is a shared medium. Two questions: Can I reliably prevent other wireless traffic from accessing the switches using TrustSec? Does anyone know of any better options with the 3000 series switches?

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  • Destination host unreachable

    - by user1010101
    I have 2 router connected to 1 switch which contains two vlans, 1 router has the ip table of vlan1 and the other router have the ip table of vlan2 I have trunked both router cable to the switch. I have set 1 ip table per router which correspond to the ip address of the PC that have this router address as a gateway. When I ping from 192.168.100.2 to 192.168.200.2 it tells me that destination host is unreachable and the message is from the router 192.168.100.1. So I guess router for 192.168.100.x does not see the router for 192.168.200.x , right ? Or am I wrong ? What are good troubleshooting steps ? http://i.imgur.com/b94Ir.png is the representation of the network, i cannot post image since im not reputated enough.

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  • gcov and switch statements

    - by Matt
    I'm running gcov over some C code with a switch statement. I've written test cases to cover every possible path through that switch statement, but it still reports a branch in the switch statement as not taken and less than 100% on the "Taken at least once" stat. Here's some sample code to demonstrate: #include "stdio.h" void foo(int i) { switch(i) { case 1:printf("a\n");break; case 2:printf("b\n");break; case 3:printf("c\n");break; default: printf("other\n"); } } int main() { int i; for(i=0;i<4;++i) foo(i); return 0; } I built with "gcc temp.c -fprofile-arcs -ftest-coverage", ran "a", then did "gcov -b -c temp.c". The output indicates eight branches on the switch and one (branch 6) not taken. What are all those branches and how do I get 100% coverage?

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  • Should I switch my server to Ubuntu Server from Windows Server 2003

    - by user22162
    I have a server thats primarily used for SRCDS, I host a few Team Fortress 2 servers on it and I would much prefer a ssh-like (more so the no-gui part) for something like this, mostly because I can't navigate with my phone on VNC very well and also because there really is no need for a gui in this situation. I sort of want to make the switch but I am unsure, because my server 2003 is very fast and If I do need to reboot, it can reboot in under 30 seconds to desktop. Should I switch?

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