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  • Abstract attributes in Python

    - by deamon
    What is the shortest / most elegant way to implement the following Scala code with an abstract attribute in Python? abstract class Controller { val path: String } A subclass of Controller is enforced to define "path" by the Scala compiler. A subclass would look like this: class MyController extends Controller { override val path = "/home" }

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  • Getting Public Info about Location in Facebook Graph API

    - by Allan Deamon
    I need to get the living city of each person in a group. Including people that are not my friends. In the browser seeing facebook profile of some unknown person, they show "lives in ...", if this is set as public information. They include the link to the city object with the city id in the link. That's all that I need. But, using a facebook app that I created to use the facebook graph api, this information is not public. I can only get the user propriety 'location' from friends of my that I have permission to see it. I gave ALL the possible permissions to my app. In the api explorer, when I use it as REST, they show few informations about someone not friend of mine. https://developers.facebook.com/tools/explorer/ Also in the api explorer, when I use the FQL, it didn't works. This query works, returning the JSON with the data: SELECT uid, name FROM user WHERE username='...'; But this other query doesn't work: SELECT uid, name, location FROM user WHERE username='...'; They return a json with a error code: { "error": { "message": "(#602) location is not a member of the user table.", "type": "OAuthException", "code": 602 } } I asked for ALL the permissions options in the token. And I can get this info in the browser version of the facebook. But how can I get it with the API ?

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  • Annotations present at compile time but absent at runtime

    - by deamon
    It is possible to use Java class files which includes annotations that are not present at runtime? Example: I want to write a class with the JPA @Embeddable annotation, which would be present at compile time (maven scope: "provided"). But the annoatation definition could be absent at runtime, if the class is used outside a JPA application.

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  • Calling methods in super class constructor of subclass constructor?

    - by deamon
    Calling methods in super class constructor of subclass constructor? Passing configuration to the __init__ method which calls register implicitely: class Base: def __init__(self, *verbs=("get", "post")): self._register(verbs) def _register(self, *verbs): pass class Sub(Base): def __init__(self): super().__init__("get", "post", "put") Or calling register explicitely in the subclass' __init__ method: class Base: def __init__(self): self._register("get", "post") def _register(self, *verbs): pass class Sub(Base): def __init__(self): _register("get", "post", "put") What is better or more pythonic? Or is it only a matter of taste?

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  • Passing parameter to base class constructor or using instance variable?

    - by deamon
    All classes derived from a certain base class have to define an attribute called "path". In the sense of duck typing I could rely upon definition in the subclasses: class Base: pass # no "path" variable here def Sub(Base): def __init__(self): self.path = "something/" Another possiblity would be to use the base class constructor: class Base: def __init__(self, path): self.path = path def Sub(Base): def __init__(self): super().__init__("something/") What would you prefer and why? Is there a better way?

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  • Exposing members or make them private in Python?

    - by deamon
    Is there a general convention about exposing members in Python classes? I know that this is a case of "it depends", but maybe there is a rule of thumb. Private member: class Node: def __init__(self): self.__childs = [] def add_childs(self, *args): self.__childs += args node = Node() node.add_childs("one", "two") Public member: class Node2: def __init__(self): self.childs = [] node2 = Node2() node2.childs += "one", "two"

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  • How to configure DB connection in a Servlet based JPA application

    - by deamon
    By default DB connections of JPA applications are configured in the META-INF/persistence.xml, when the application is not deployed to a full Java EE application server. In my opinion it is not very elegant to place such environment specific configuration into a file that is inside a .war file. How could a DB connection of a Servlet based JPA application be configured more flexible (=outside of the .war file)?

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  • Set reference = null in finally block?

    - by deamon
    A colleague of mine sets reference to null in finally blocks. I think this is nonsense. public Something getSomething() { JDBCConnection jdbc=null; try { jdbc=JDBCManager.getConnection(JDBCTypes.MYSQL); } finally { JDBCManager.free(jdbc); jdbc=null; // <-- Useful or not? } } What do you think of it?

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  • Python package name conventions

    - by deamon
    Is there a package naming convention for Python like Java's com.company.actualpackage? Most of the time I see simple, potentially colliding package names like "web". If there is no such convention, is there a reason for it? What do you think of using the Java naming convention in the Python world?

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  • How to deploy to Tomcat from NetBeans?

    - by deamon
    I've added Tomcat in the "Tools Servers" menu and as you can see it appears in the list of servers: But when I try to run my project, I cannot select Tomcat! The drop-down with servers is empty. I tried it with NetBeans 6.8 and 6.9 Beta. Any idea?

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  • WCF service hosted in IIS7 with administrator rights?

    - by Allan Baker
    Hello, How do I grant administrator rights to a running WCF service hosted in IIS7? The problem is, my code works fine in a test console application runned as an administrator, but the same code used from WCF service in IIS7 fails. When I run the same console test application without admin rights, code fails. So, how do I grant admin rights to a WCF service hosted in IIS7? Do I grant admin rights to IIS7 service? Can I grant rights to a specific WCF service? How do I do 'Run as an administrator' on IIS7 or specific website? Thanks! (That's the question, here is a more detailed description of a situation: I am trying to capture frames from a webcam into a jpg file using Touchless library, and I can do that from a console application with admin rights. When I run that same console app without admin rights I cannot access a webcam in code. Same thing happens in a WCF service with the same code.)

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  • Failover or load balancing configuration on Apple Xserve and Mac OS X Server Snow Leopard (10.6)

    - by Alasdair Allan
    I'm currently installing a number of Apple Xserve boxes running Mac OS X Server (10.6). After poking and prodding for a while I can't find any obvious way, or documentation telling me how, to set up the 2 ethernet ports in a failover or load-balancing configuration. There seems to be an obvious way to do link aggregation, but not failover or load-balancing? What's the default configuration if I enable both ports with the same (manually configured) IP address?

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  • How can you make a Windows USB HDD Modify All for All Users

    - by David Allan Finch
    Hi, I use a USB HDD a lot between lots of different Windows Boxes. What I find after a while is that there get to be lots of different Permission on the files in some cases stopping me looking at files or removing them. They want Admin rights or even sometimes you need to put the disk back into the original machine with the original user. This is a right pain. Is there away of making the disk have Modify All for All Users and making this the default for all files on the disk. Thanks

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  • Identifying and Resolving Oracle ITL Deadlock

    - by Allan
    I have an Oracle DB package that is routinely causing what I believe is an ITL (Interested Transaction List) deadlock. The relevant portion of a trace file is below. Deadlock graph: ---------Blocker(s)-------- ---------Waiter(s)--------- Resource Name process session holds waits process session holds waits TM-0000cb52-00000000 22 131 S 23 143 SS TM-0000ceec-00000000 23 143 SX 32 138 SX SSX TM-0000cb52-00000000 30 138 SX 22 131 S session 131: DID 0001-0016-00000D1C session 143: DID 0001-0017-000055D5 session 143: DID 0001-0017-000055D5 session 138: DID 0001-001E-000067A0 session 138: DID 0001-001E-000067A0 session 131: DID 0001-0016-00000D1C Rows waited on: Session 143: no row Session 138: no row Session 131: no row There are no bit-map indexes on this table, so that's not the cause. As far as I can tell, the lack of "Rows waited on" plus the "S" in the Waiter waits column likely indicates that this is an ITL deadlock. Also, the table is written to quite often (roughly 8 insert or updates concurrently, as often as 240 times a minute), so and ITL deadlock seems like a strong possibility. I've increased the INITRANS parameter of the table and it's indexes to 100 and increased the PCT_FREE on the table from 10 to 20 (then rebuilt the indexes), but the deadlocks are still occurring. The deadlock seems to happen most often during an update, but that could just be a coincidence, as I've only traced it a couple of times. My questions are two-fold: 1) Is this actually an ITL deadlock? 2) If it is an ITL deadlock, what else can be done to avoid it? Cross-posted from Stack Overflow. Deadlocks are normally a programming problem, but ITL deadlocks relate directly to how Oracle writes to disk, so this may be an area where DBAs have more experience.

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  • How do I configure an ordinary TV remote control to work with lirc on Linux?

    - by Allan Lewis
    I am running MythTV on Ubuntu 9.10 and I would like to use a TV remote to control it. I know that lirc needs a configuration file for the remote, but none of my remotes is in the official database. If I point a remote at the receiver on my TV card (a Pinnacle PCTV "Solo", model 72e) and press a button, dmesg logs the code generated by the remote, so I assume I just have to make a config file with a list of commands assigned to these codes. I've read a few how-tos but I still don't understand exactly how to create the config file. Some of the guides I've read refer to IR receivers on TV cards working at a "higher level of abstraction", which I take to mean that they decode the signal and provide a code, like the ones I can see in dmesg, rather than just giving raw data, but none of them explain where to go from there! Any help would be greatly appreciated!

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  • Exchange DiskShadow/Robocopy backup does not purge log files

    - by Robert Allan Hennigan Leahy
    I have a series of scripts setup to backup my Exchange. The following command is executed to start the process: diskshadow /s C:\Backup_Scripts\exchangeserverbackupscript1.dsh This is exchangeserverbackupscript1.dsh: #DiskShadow script file set verbose on #delete shadows all set context persistent writer verify {76fe1ac4-15f7-4bcd-987e-8e1acb462fb7} set metadata C:\Backup_Scripts\shadowmetadata.cab begin backup add volume C: alias SH1 create expose %SH1% P: exec C:\Backup_Scripts\exchangeserverbackupscript1.cmd end backup delete shadows exposed P: exit #End of script And this is exchangeserverbackupscript1.cmd: robocopy "P:\Program Files\Microsoft\Exchange Server\Mailbox\First Storage Group" "\\leahyfs\J$\E-Mail Backups\Day 1" /MIR /R:0 /W:0 /COPY:DT /B This is not causing Exchange to purge its log files. The edb file is 4.7 gigabytes, but the First Storage Group folder itself is 50+ gigabytes due to many, many log files for each day going back to 2009. Is there any way -- I've Googled and haven't found anything -- to notify Exchange when I've completed a full backup, and have it purge its log files? According to this and this, end backup should cause Exchange to "flush the transaction logs for that storage group" but only "if a successful backup of a storage group occurred", which leaves my question as: What constitutes a "successful backup", and why is what I'm doing not it?

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  • How to make local drive available in apache localhost

    - by Ronald Allan
    How can I make my "Drive D:" "Drive E" available in localhost. I'm running apache on my backtrack machine. My default is /var/www/. Every directory I created inside the /var/www/ is available and all working fine. Let's say I created /var/www/PENTEST/ the contents of that PENTEST directory can be accessed through: localhost/PENTEST/ How can I make this work: localhost/media/DATA/ The /media/DATA/ is my DRIVE D: I edited this: ServerAdmin webmaster@localhost DocumentRoot /media/DATA/ <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /media/DATA/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog /var/log/apache2/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 </Directory> Still not working. I'm getting 404. # # I figured it out. Thank for the post of "RiggsFolly" which can be found here: http://forum.wampserver.com/read.php?2,89163. I just have to change this: ServerAdmin webmaster@localhost DocumentRoot /media/DATA/ <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /media/DATA/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> Into this: ServerAdmin webmaster@localhost DocumentRoot D:/media/DATA/ <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory D:/media/DATA/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory>

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  • ipv6 auto configuration not working in ubuntu natty

    - by allan ruin
    In win7, my computer can automatically get a IPV6 global address and use ipv6 network, but in ubuntu natty, I can't find out how to let stateless configuration work. My network is a university campus network,so I don't need tunnels. I think if one thingg can silently and successfully complished in windows it shouldn't be impossible in linux. I did can manually edit /etc/network/interfaces and use a static ipv6 address, and I can use ipv6 this way, but I just want to use auto-configuration. I found this post: How to disable autoconfiguration on IPv6 in Linux? and try sudo sysctl -w net.ipv6.conf.all.autoconf=1 sudo sysctl -w net.ipv6.conf.all.accept_ra=1 but no luck

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  • Can a device (WAP or switch) be configured as an 802.1x supplicant?

    - by Allan Ross
    We are looking at implementing 802.1x on a wired/wireless network. What I am looking for is a device that can act as a supplicant and once authenticated on the network, is able to pass traffic from any downstream connected device. The point of doing this would be to allow a properly pre-configured device to be provided to a client user who could then connect any device on the downstream side of the device. We will be able to manage the aggregate traffic on the device without concern for what is connected on the far side. Am I dreaming; does every device out there support this and I just don't know it or is reality fall somewhere in the middle?

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