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• Ruby Rack: startup and teardown operations (Tokyo Cabinet connection)

  - by clint.tseng

  I have built a pretty simple REST service in Sinatra, on Rack. It's backed by 3 Tokyo Cabinet/Table datastores, which have connections that need to be opened and closed. I have two model classes written in straight Ruby that currently simply connect, get or put what they need, and then disconnect. Obviously, this isn't going to work long-term. I also have some Rack middleware like Warden that rely on these model classes. What's the best way to manage opening and closing the connections? Rack doesn't provide startup/shutdown hooks as I'm aware. I thought about inserting a piece of middleware that provides reference to the TC/TT object in env, but then I'd have to pipe that through Sinatra to the models, which doesn't seem efficient either; and that would only get be a per-request connection to TC. I'd imagine that per-server-instance-lifecycle would be a more appropriate lifespan. Thanks!

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• org.apache.http.impl.cookie.BasicClientCookie not serializable???

  - by Misha Koshelev

  Dear All: I am quite confused... I am reading here and BasicClientCookie clearly implements Serializable per JavaDoc: http://hc.apache.org/httpcomponents-client/httpclient/apidocs/org/apache/http/impl/cookie/BasicClientCookie.html However, my simple Groovy script: #!/usr/bin/env groovy @Grapes( @Grab(group='org.apache.httpcomponents', module='httpclient', version='4.0.1') ) import org.apache.http.impl.cookie.BasicClientCookie import java.io.File def cookie=new BasicClientCookie("name","value") println cookie instanceof Serializable def f=new File("/tmp/test") f.withObjectOutputStream() { oos-> oos.writeObject(cookie) } outputs: false Caught: java.io.NotSerializableException: org.apache.http.impl.cookie.BasicClientCookie at t$_run_closure1.doCall(t.groovy:12) at t.run(t.groovy:11) I have checked and I have no other versions of HttpClient anywhere in classpath (if I take Grapes statement out it cannot find file). Thank you! Misha Koshelev

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• Problem running gems in OS X

  - by akarnid

  I'm running Snow Leopard, and installed a custom built Ruby according to the guide here: http://hivelogic.com/articles/compiling-ruby-rubygems-and-rails-on-snow-leopard . My ruby binary lives in usr/local/bin/ruby and my gems are installed in /usr/local/bin/gem . My gem env looks like so: RUBY VERSION: 1.8.7 (2008-08-11 patchlevel 72) [universal-darwin10.0] - INSTALLATION DIRECTORY: /Library/Ruby/Gems/1.8 - RUBY EXECUTABLE: /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby - EXECUTABLE DIRECTORY: /usr/bin I think I may have borked the install since all actions taked on gems give the error: ERROR: While executing gem ... (Errno::EEXIST) File exists - /usr/local/bin/ruby How do you edit the environment variables for the gem environment? And for those of you on OS X and using ruby AND gems, what did you use to get yourself up and running? I'm thinking of just nuking everything and starting anew.

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• Why isn't Passenger respecting my custom log format?

  - by Millisami

  I need to change the log format of my rails app. I put this file in lib directory and required it in development.rb env file. require 'hodel_3000_compliant_logger' config.logger = Hodel3000CompliantLogger.new(config.log_path) and I should get the output of the development.log file as follows: Jun 28 03:05:13 millisami-notebook rails[18243]: Memory usage: 86888 | PID: 18243 I get this exact log when I start my app with script/server (Mongrel). But when I run the app via Passenger, the format being logged is Rails' default. Why doesn't Passenger write to the log file like Mongrel does?

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• How do you sort files numerically?

  - by Zachary Young

  Hello all, First off, I'm posting this because when I was looking for a solution to the problem below, I could not find one on stackoverflow. So, I'm hoping to add a little bit to the knowledge base here. I need to process some files in a directory and need the files to be sorted numerically. I found some examples on sorting--specifically with using the lamba pattern--at wiki.python.org, and I put this together: #!env/python import re tiffFiles = """ayurveda_1.tif ayurveda_11.tif ayurveda_13.tif ayurveda_2.tif ayurveda_20.tif ayurveda_22.tif""".split('\n') numPattern = re.compile('_(\d{1,2})\.', re.IGNORECASE) tiffFiles.sort(cmp, key=lambda tFile: int(numPattern.search(tFile).group(1))) print tiffFiles I'm still rather new to Python and would like to ask the community if there are any improvements that can be made to this: shortening the code up (removing lambda), performance, style/readability? Thank you, Zachary

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• jstring to L_TCHAR* format

  - by Ayusman

  Hi All, I have been trying to call a C function that has the following signature int changeFoo(L_TCHAR* pszFileSrc){....} in my JNI call my method looks like this: JNIEXPORT jint JNICALL Java_com_me_L_AFoo (JNIEnv * env, jclass jclass, jstring pSrc) { jint retValue = -100; retValue = changeFoo(pSrc); return retValue; } I get the following error in visual studio. Error 1 error C2664: 'L_FileConvert' : cannot convert parameter 1 from 'jstring' to 'L_TCHAR *' c:\Ayusman\Work\MyVCpp\LTExampleDll\LTExampleDll\LTExampleMain.cpp 46 LTExampleDll When I looked at the definition of L_TCHAR * here is what I got in the header files (in that sequence): typedef TCHAR L_TCHAR; typedef WCHAR TCHAR,*PTCHAR; typedef wchar_t WCHAR; //wc, 16 bit UNICODE char I work on java, this is a JNI application that I am trying to build. Can any body help as to how can I convert this properly? Thanks, Ayusman

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• Grails deploy on Tomcat6

  - by Jack

  Hello, while trying to deploy a Grails application into tomcat6 I ran into some problems: I used the grails war command to build up a war, then copied it to var/lib/tomcat6/webapps and tried to restart the container. I had to change default Tomcat policy to skip security exceptions, since I couldn't access environment variable (like grails.env), then tried again but it gives me an exception related to instantiating something, but it's not clear where should I try to fix the error, according to tomcat6 logs the problem is: SEVERE: Exception sending context initialized event to listener instance of class org.codehaus.groovy.grails.web.context.GrailsC$ org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pluginManager' defined in ServletContext$ at java.lang.Thread.run(Thread.java:619) Caused by: org.codehaus.groovy.grails.exceptions.NewInstanceCreationException: Could not create a new instance of class [Hiberna$ ... 1 more Caused by: java.lang.NoClassDefFoundError: org.hibernate.cfg.Environment It seems like it's unable to load org.hibernate.cfg.Environment class. I checked the applicationContext.xml and it refers to grails.xml to search for plugins, in this last file I actually have HibernateGrailsPlugin. Where should I look to find if the plugin is present?

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• iPad: CoreData FetchedRequest Ignores Changes in Predicate

  - by Michael

  Hi there, While programming an iPad-app, I'm just running into trouble using a fetchedResultsController with a "dynamic" predicate. it seems the changes to the predicate get ignored. No matter how the predicate changes, I always get the result of the first fetch ... same code runs without no problems on iphone-env (3.1.x) !! sample : - (void)performSearch:(NSString *)searchText { self.displaySearchResults = TRUE; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"searchWords contains[cd] %@", searchText]; [self.fetchedSearchResultsController.fetchRequest setPredicate:predicate]; NSError *error = nil; if (![self.fetchedSearchResultsController performFetch:&error]) { NSLog(@"Unresolved error %@, %@", error, [error userInfo]); abort(); } if(deviceIsIPad) { [self showSearchResults]; } else { [cookBookOverview reloadData]; } } can anyone help plz ? btw.: excuse my painful english ;-)

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• Using Interfaces in JNI

  - by lhw

  I am trying to use (*env)->RegisterNatives to add methods to a defined class which I then add to a callback list. The callback sender of course expects my class to implement a certain interface which I do not. And is failing on execution. If I add the keyword "implements Listener" to my class in Java the javac expects to have the methods definition in Java or with native keyword which I try to avoid here, as I'd like to register the methods within the JNI_OnLoad and execute one of them afterwards. The question now is: Can I implement the interface in JNI or avoid the error message in Java?

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• Listing time every second as a Bash script

  - by Caleb

  Hello all, first time here as I've finally started to learn programming. Anyway, I'm just trying to print the time in nanoseconds every second here, and I have this: #!/usr/bin/env bash while true; do date=(date +%N) ; echo $date ; sleep 1 ; done Now, that simply yields a string of date's, which isn't what I want. My learning has been rather messy, so I hope you'll excuse me for this if it's really simple. Also, I did manage to fine this, that worked on the prompt: while true ; do date +%N ; sleep 1 ; done But that obviously doesn't work as a script.

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• 'script/console test' with spork and rspec not loading the whole environment?

  - by TheDeeno

  I'm trying to load up console to interact with some of my rspec mocking helpers. I expected that running script/console test would load an env similar to when I run spec. However, this doesn't appear to be the case. It looks like spec_helper is never loaded. Or, if it is, it's not actually running through the logic because spork has polluted it a bit. In short, is there a quick and easy way to get an interactive rspec party going?

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• Loop over a file and write the next line if a condition is met

  - by 111078384259264152964

  Having a hard time fixing this or finding any good hints about it. I'm trying to loop over one file, modify each line slightly, and then loop over a different file. If the line in the second file starts with the line from the first then the following line in the second file should be written to a third file. !/usr/bin/env python with open('ids.txt', 'rU') as f: with open('seqres.txt', 'rU') as g: for id in f: id=id.lower()[0:4]+'_'+id[4] with open(id + '.fasta', 'w') as h: for line in g: if line.startswith(''+ id): h.write(g.next()) All the correct files appear, but they are empty. Yes, I am sure the if has true cases. :-) "seqres.txt" has lines with an ID number in a certain format, each followed by a line with data. The "ids.txt" has lines with the ID numbers of interest in a different format. I want each line of data with an interesting ID number in its own file. Thanks a million to anyone with a little advice!

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• Initializing Multidimentional Arrays

  - by Eddy Freeman

  Hi Guy, I have a 3-multidimentional array : int[][][] env; which i would like to initialize with data in a text file. The data in the text file looks like this: { { { 0, 1,-1}, { 0, 2,-1}, {-1,-1,-2}, { 0, 0, 0} }, { { 0, 0,-1}, { 0, 0,-1}, {-1,-1,-2}, { 0, 0, 0} } } Actually the accolades can be removed and replaced with different characters if it is necessary. If there are any better way to format the values in the text file, then it is welcomed. I am looking for the best way to initialize the array in the java program with the values from the text file. All your help is appreciated. Thanks.

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• Catching Oracle Errors in Django

  - by Dashdrum

  My Django app runs on an Oracle database. A few times a year, the database is unavailable because of a scheduled process or unplanned downtime. However, I can't see how to catch the error a give a useful message back to the requester. Instead, a 500 error is triggered, and I get an email (or hundreds) showing the exception. One example is: File "/opt/UDO/env/events/lib/python2.6/site-packages/django/db/backends/oracle/base.py", line 447, in _cursor self.connection = Database.connect(conn_string, **conn_params) DatabaseError: ORA-01035: ORACLE only available to users with RESTRICTED SESSION privilege I see a similar error with a different ORA number when the DB is down. Because the exception is thrown deep within the Django libraries, and can be triggered by any of my views or the built in admin views, I don't know where any exception trapping code would go. Any suggestions?

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• Best practise question

  - by sid_com

  Hello! With version would you prefer? #!/usr/bin/env perl use warnings; use strict; use 5.010; my $p = 7; # 33 my $prompt = ' : '; my $key = 'very important text'; my $value = 'Hello, World!'; my $length = length $key . $prompt; $p -= $length; Option 1: $key = $key . ' ' x $p . $prompt; Option 2: if ( $p > 0 ) { $key = $key . ' ' x $p . $prompt; } else { $key = $key . $prompt; } say "$key$value"

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• How do I route watir through a proxy pragmatically?

  - by feydr

  I'm trying to route watir through a proxy pragmatically -- this means within the script I'd like to change my proxy dynamically before launching the browser. Here's what I've tried so far (and so far am failing): I'm running chrome and lucid lynx ubuntu. I chose TREX cause I thought watir might be making use of PROXY or something. I rewrote /usr/bin/google-chrome as: #!/bin/bash /opt/google/chrome/chrome --proxy-server="$TREX" $@ The reason I'm passing in the environment variable to proxy-server rather than http_proxy is because I never could get http_proxy to work as is anyways then I did a simple: require 'rubygems' require 'watir-webdriver' ENV['TREX'] = "XX.XX.XX.XX:YY" browser = Watir::Browser.new(:chrome) browser.goto("http://mysite.com") Anyways, what is happening here is that it is forwarding me to the login page of the proxy rather than just forwarding the request. What am I missing here? I feel like I'm pretty close.

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• Can we view objects in the JVM memory?

  - by Sebastien Lorber

  Hey, At work we found that on some instances (particulary the slow ones) we have a different behaviour, acquired at the reboot. We guess a cache is not initialized correctly, or maybe a concurrency problem... Anyway it's not reproductible in any other env than production. We actually don't have loggers to activate... it's an old component... Thus i'd like to know if there are tools that can help us to see the different objets present in the JVM memory in order to check the content of the cache... Thank you!

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• Python `.pth` files and using relative paths

  - by kRON

  I have a lot of development versions of packages installed with virtualenv under the default /src directory in the environment. Normally, I decided to do the development of my project under the /src directory afterwards. To add my directory to the Python path, I decided to eschew from using any absolute paths, since I'm going to have to move the project around with my friends. It's a Django application, so I was happy with putting environment.pth under the root that contained the path to my project and a wsgi in the same directory would call the sites module to parse environment.pth. All good. I was also looking to move the .pth file into site-packages, but I'm having trouble with relative paths that move up the directory tree. For: /env /lib /site-pacakges /src /myproject So, the .pth entry in site-packages to myproject should look like ../../src/myproject, but this doesn't seem to be working for me on Windows.

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• non-servlet JSP

  - by h2g2java

  I realise there are EL and near EL frameworks like StringTemplate, JUEL, Velocity, etc. However, I am not asking for list of alternatives to JSTL/EL. I came across a package more than a year ago, someone who wrote a util that emulates the functionality of JSP for non-servlet env, i.e., JSP composition which does not need a "servlet container" to function. I ignored it and now I think it would be helpful to me and I need help to recall what it is. My actual motivation is similar to what StringTemplate, JUEL, Velocity would offer to help me compose SQL blocks, HTML blocks but I am thinking that JSPs are precompiled into bytecode and JSPs are more run-time efficient since run-time parsing is done no more than once. So actually, recommendation for alternatives would be acceptable as long as the templates are precompiled into bytecode. But I still prefer the JSP emulator.

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• In Sinatra, best way to serve iPhone layout vs. normal layout?

  - by Doug

  I'm writing a Sinatra app which needs to render different layouts based on whether the user is using an iPhone or a regular browser. I can detect the browser type using Rack-Mobile-Detect but I'm not sure of the best way to tell Sinatra which layout to use. Also, I have a feeling that how I choose to do this may also break page caching. Is that true? Example code: require 'sinatra/base' require 'haml' require 'rack/mobile-detect' class Orca < Sinatra::Base use Rack::MobileDetect helpers do def choose_layout if request.env['X_MOBILE_DEVICE'] == :iPhone # use iPhone layout else # use normal layout end end end before do # should I use a before filter? choose_layout() end get '/' do haml :home # with proper layout end end #Class Orca

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• Programatically Determining Bin Path

  - by Andy

  I'm working on a web app called pj and there is a bin file and a src folder. The relative paths before I deploy the app will look something like: pj/bin and pj/src/pj/script.py. However, after deployment, the relative paths will look like: pj_dep/deployed/bin and pj_dep/deployed/lib/python2.6/site-packages/pj/script.py Question: Within script.py, I am trying to find the path of a file in the bin directory. This leads to 2 different behaviors in the dev and deployment environment. If I do os.path.join(os.path.dirname(__file__), 'bin') to try to get the path for the dev environment, I will have a different path for the deployment environment. Is there a more generalized way I can find the bin directory so that I do not need to rely on an if statement to determine how many directories to go up based on the current env? This doesn't seem flexible and might cause other issues later on when the code is moved.

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• importing CELERY* environment variables in django settings.py causes celeryd not to start

  - by Taras

  I just spent 2 hours trying to figure out why django celery stopped working. Celery would being to start, but would stop short of printing out the configuration items, implying that it wasn't starting correct. The log would only contain The celery.decorators module along with the magic keyword arguments, are deprecated, and will be removed in version 3.0. Please use the celery.task module instead of celery.decorators, and the task.request should be used instead of the magic keyword arguments: from celery.task import task See http://bit.ly/celery22major for more information. """)) It turns out that some celery env variables that I was importing to try and fix a different problem were causing celery not to start correctly: from celery.tests.config import CELERY_QUEUES, CELERY_DEFAULT_QUEUE, CELERY_DEFAULT_ROUTING_KEY Even though I wasn't using them anywhere. Does anyone know what was happening?

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• Is there a recommended command for "hg bisect --command"?

  - by blokeley

  I have an emergent bug that I've got to track down tomorrow. I know a previous hg revision which was good so I'm thinking about using hg bisect. However, I'm on Windows and don't want to get into DOS scripting. Ideally, I'd be able to write a Python unit test and have hg bisect use that. This is my first attempt. bisector.py #!/usr/bin/env python import sys import unittest class TestCase(unittest.TestCase): def test(self): #raise Exception('Exception for testing.') #self.fail("Failure for testing.") pass def main(): suite = unittest.defaultTestLoader.loadTestsFromTestCase(TestCase) result = unittest.TestResult() suite.run(result) if result.errors: # Skip the revision return 125 if result.wasSuccessful(): return 0 else: return 1 if '__main__' == __name__: sys.exit(main()) Perhaps I could then run: hg bisect --reset hg bisect --bad hg bisect --good -r 1 hg bisect --command=bisector.py Is there a better way of doing it? Thanks for any advice.

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• Create SOAP message from WSDL using axiom

  - by code-gijoe

  Hi, I'm a starting a project which consist in sending a request to a web-service (which is already available) and parsing the response. I have the WSDL and URL endpoints. Does anyone have a startup tutorial on how to build something from there? I would like to use Axis2 + Axiom to send the service request and receive and process the response. I'm using eclipse as dev env. I've been search for a tut on how to do this but with no success. Any suggestion would be greatly appreciated!

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• match elements from two files, how to write the intended format to a new file

  - by user2489612

  I am trying to update my text file by matching the first column to another updated file's first column, after match it, it will update the old file. Here is my old file: Name Chr Pos ind1 in2 in3 ind4 foot 1 5 aa bb cc ford 3 9 bb cc 00 fake 3 13 dd ee ff fool 1 5 ee ff gg fork 1 3 ff gg ee Here is the new file: Name Chr Pos foot 1 5 fool 2 5 fork 2 6 ford 3 9 fake 3 13 The updated file will be like: Name Chr Pos ind1 in2 in3 ind4 foot 1 5 aa bb cc fool 2 5 ee ff gg fork 2 6 ff gg ee ford 3 9 bb cc 00 fake 3 13 dd ee ff Here is my code: #!/usr/bin/env python import sys inputfile_1 = sys.argv[1] inputfile_2 = sys.argv[2] outputfile = sys.argv[3] inputfile1 = open(inputfile_1, 'r') inputfile2 = open(inputfile_2, 'r') outputfile = open(outputfile, 'w') ind = inputfile1.readlines() cm = inputfile2.readlines()[1:] outputfile.write(ind[0]) #add header for i in ind: i = i.split() for j in cm: j = j.split() if j[0] == i[0]: outputfile.writelines(j[0:3] + i[3:]) inputfile1.close() inputfile2.close() outputfile.close() When I ran it, it returned a single column rather than the format i wanted, any suggestions? Thanks!

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