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• Having problem with a crawl service in .net: Server not responding to IP ping. Is it bandwidth or ht

  - by Hamid

  Hi to all I develop web crawling service (windows service / multi-thread) . its work fine, but sometimes my server network not response. and i can't ping server IP (from internet), but can ping by other network card (local ip) that not access to internet. after i open server with remote desktop and stop crawling service. i could ping. What's my problem? Bandwidth limit or max connection limit exceed or ??? how to prevent this issue? Note: when this problem occur, i open browser for browse web site, but can't open any website!!! Could you please help me. Thanks in advanced

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• Is there any Application Server Frameworks for other languages/platforms than JavaEE and .NET?

  - by Jonas

  I'm a CS student and has rare experience from the enterprise software industry. When I'm reading about enterprise software platforms, I mostly read about these two: Java Enterprise Edition, JavaEE .NET and Windows Communication Foundation By "enterprise software platforms" I mean frameworks and application servers with support for the same characteristics as J2EE and WCF has: [JavaEE] provide functionality to deploy fault-tolerant, distributed, multi-tier Java software, based largely on modular components running on an application server. WCF is designed in accordance with service oriented architecture principles to support distributed computing where services are consumed by consumers. Clients can consume multiple services and services can be consumed by multiple clients. Services are loosely coupled to each other. Is there any alternatives to these two "enterprise software platforms"? Isn't any other programming languages used in a bigger rate for this problem area? I.e Why isn't there any popular application servers for C++/Qt?

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• Are compound command's second and subsequent lines not effected by HISTCONTROL in bash?

  - by UniMouS

  When consulting bash's man page, it read this sentence about bash history: The second and subsequent lines of a multi-line compound command are not tested, and are added to the history regardless of the value of HISTCONTROL. But I have tried this: $ HISTCONTROL=ignorespace $ if [ -f /var/log/messages ] > then > echo "/var/log/message exists." > fi $ history | tail -2 18 HISTCONTROL=ignorespace 19 history | tail -2 Note that the if is leaded by a space. Why the second line of this if compound command still not appear in the history?

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• executorservice to read data from database in chuncks and run process on them

  - by TazMan

  I'm trying to write a process that would read data from a database and upload it onto a cloud datastore. How can I decide the partition strategy of the data? I want to query the table in chunks and process each chunk in 10 threads. Each thread basically will send the data to an individual node on a 10 node cluster on the cloud.. Where in the below multi threading code will the dataquery to extract and send 10 concurrent requests for uploading data to cloud would be? public class Caller { public static void main(String[] args) { ExecutorService executor = Executors.newFixedThreadPool(10); for (int i = 0; i < 10; i++) { Runnable worker = new DomainCDCProcessor(i); executor.execute(worker); } executor.shutdown(); while (!executor.isTerminated()) { } System.out.println("Finished all threads"); } }

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• Java Authenticator on a per connection basis?

  - by Martijn Laarman

  I'm building an Eclipse plugin that talks to a REST interface which uses Basic Authentication. When the authentication fails I would like to popup my plugin's settings dialog and retry. Normally I could use the static Authenticator.setDefault() to setup an authenticator for all HttpURLConnection's for this, but since I am writing a plugin I don't want to overwrite Eclipse's default Authenticator (org.eclipse.ui.internal.net.auth); I thought of setting my custom Authenticator before loading and putting Eclipse's default back afterwards, but I imagine this will cause all sorts of race issues with multithreading so I quickly lost that notion. Google searches yield all sorts of results basically telling me it's not possible: The Java URLConnection API should have a setAuthenticator(Authenticator) method for making it easier to use this class in multi-threaded context where authentication is required. Source If applications contains few third party plugins and each plugin use its own Authenticator what we should do? Each invocation of "Authenticator.setDefault()" method rewrite previously defined Authenticator... Source Are there any different approaches that might help me overcome this issue?

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• Generate form based on selection

  - by Jay

  I'm looking to build a web application that allows a person to select a plan and fill out an application for that plan. There are multiple plans and each plan generates a different application. Some of the questions are identical such as fields related to personal information. I'm thinking of using ASP.NET MVC to build this web application. When generating the multi page application would it be best to Create partial views (sections of applications) and combine them when generating the form. OR Build some type of dynamic form generator

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• attaching multiple files to a domain class

  - by Emyr

  I've seen various Grails plugins which allow easier handling of file uploads, however these tend only to support a single file per form-submit. I'd like a multi-attach form where as soon as you pick one file, an extra field and button is added using JS (various sites do it like this). Do you know of any good plugins which provide elegant uploading of multiple files without excessive coding? A progress bar either per-file of for the whole process would also be very nice. I don't know to what extent I can allow GORM to handle a java.io.File field (or in this case a Collection<File>).

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• Loading Unmanaged C++ in C#. Error Attempted to read or write protected memory

  - by Thatoneguy

  I have a C++ function that looks like this __declspec(dllexport) int ___stdcall RegisterPerson(char const * const szName) { std::string copyName( szName ); // Assign name to a google protocol buffer object // Psuedo code follows.. Protobuf::Person person; person->set_name(copyName); // Error Occurs here... std::cerr << person->DebugString() << std::endl; } The corresponding C# code looks like this... [DllImport(@"MyLibrary.dll", SetLastError = true)] public static unsafe extern int RegisterPerson([MarshalAs(UnmanagedType.LPTStr)]string szName) Not sure why this is not working. My C++ library is compiled as Multi Threaded DLL with MultiByte encoding. Any help would be appreciated. I saw this is a common problem online but no answers lead me to a solution for my problem.

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• Possible to exclude a column from `*` ?

  - by Earlz

  Is it possible to exclude a column from a select * from table statement with SQL Server? I have a need for this and this is my only option other than parsing a raw SQL string to get out the required field names (I really don't want to do that). Just to be bold. When the query is made I do not have access to the list of fields needed from the table but I do know which field I do not need. This is part of a complex multi-part query. Surely there must be some way even if it's "hackish" such as using table variables or views

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• Focussing multiple selected values

  - by sarah

  Hi All, I have the following code <%for(int x = 0; x < skuList.size(); x++) {% "<%= skuList.get(x)% <%} % and i have check if the skuList has the data from the following list aUserForm.getData() if yes i have to show them selected,How can i do this ? I am displaying data as a list in mulitple selection box,the scenario of focus is on edit where in i need to preselect the already selected values.So i have skuList having all data and aUserForm.getData() has only preselected data,i just need to focus this the multi select box

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• Will Haskell be a good choice for my task?

  - by Narzanka

  I'm starting a new project and don't know which language to use. My 'must have' requirements are: Be able to run on Windows/LinuxMacOs natively (native executable) - user should be able to just run the exe (when on Windows for example) and see the results. No runtimes/interpreters (no jvm, clr, etc) - one file download should be enough to run the application. Full unicode support. Be able to manipulate OS threads (create them, run multiple tasks in parallel on multi-core CPUs, etc). Be reasonably fast (Python level performance and better). To have some kind of standard library that does low-level, mundane tasks. Not very niche and have some community behind it to be able to ask questions. My 'nice to have' requirements are: Language should be functional It should have good string manipulation capabilities (not necessarily regex) Not extremely hard to learn I'm thinking about Haskell now but keeping in mind OCaml as well. Please advice if my choice is correct.

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• Value of Step-by-Step Asserts in Unit Tests

  - by Eric J.

  When writing unit tests, there are cases where one can create an Assert for each condition that could fail or an Assert that would catch all such conditions. C# Example: Dictionary<string, string> dict = LoadDictionary(); // Optional Asserts: Assert.IsNotNull(dict); Assert.IsTrue(dict.Count > 0); Assert.IsTrue(dict.ContainsKey("ExpectedKey")); // Condition actually interested in testing: Assert.IsTrue(dict["ExpectedKey"] == "ExpectedValue"); Is there value to a large, multi-person project in this kind of situation to add the "Optional Asserts"? There's more work involved (if you have lots of unit tests) but it will be more immediately clear where the problem lies. I'm using VS 2010 and the integrated testing tools but intend the question to be generic.

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• Windows Form Components Access

  - by rxm0203

  What is the best way to access components (e.g. imagelist, timer) from a form instance? I am working on multi form windows forms application on .NET Compact Framework version 3.5 SP1 with C#. I have a Controller class associated with each form for MVC implementation. Here is my sample Controller class. public class Controller { public void Init(Form f) { //f.Controls will allow access to all controls //How shall I access imagelist, timer on form f. } } My question is how can I access non visual components without taking a performance hit of reflection? Any code snippets are welcome. If reflection is only way, then can you provide me optimal way for components access please? Thanks,

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• In a Windows forms application, how can I use a listbox in a DataGridView coloumn instead of a combo

  - by Alex

  I'm working on a windows forms application that uses a DataGridView. Some of the cells contain a DataGridViewComboBox. In some cases, I have several values to display in the combobox. For that scenario, it would be better to use a ListBox instead of a ComboBox. Is it possible to use a multi-column listbox within a DataGridView instead of a ComboBox? If so, can you point me in the right direction? Thanks much. Al D.

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• Portable Socket programming in C/C++ possible?

  - by questions

  I am thinking of creating a multi-platform portable C++ server-client application. Is it even possible while using only standard libraries? If no, what other libraries are there? Are there any improvements in this direction in C++11x? Like for threads, now we have std::threads. To make it more clear.. I want something like boost::thread, which provides multiplatform portable multithreading, for networking. And why C++ doesn't have libraries(standard) for such basic things like networking?

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• Simulators for thread scheduling on multicore

  - by shijie xu

  I am seeking a simulator for thread scheduling at multi-core architecture, that is mapping threads to the cores at runtime. During runtime, simulator collects overall cache and IPC statistics. I checked below simulators, but seems there are not sufficient for me: Simplescalar: A simulator only for single core. SESC: multiprocessor simulator with detailed power, thermal, and performance models, QSim: provides instruction-level control of the emulated environment and detailed information about the executing instruction stream. It seems both SESC and QSim supports instructions scheduling instead of thread scheduling on the cores? Anyone can help provide some clues or share experience for this part?

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• port an iOS (iPhone) app to mac?

  - by William Jockusch

  Is there a preferred way to go about this? The app in question is not too large . . . single-player game that I wrote over the course of a couple of months. EDIT: I should add that I have no experience with mac development . . . outside of what comes naturally with being an iOS developer. EDIT: Classes heavily used in the game: subclasses of NSObject, UIView, and UIViewController. I don't know much about NSView, but I'm pretty sure all the UIView stuff will work in that class. Also some use of UITableViewController. I do also have Game Center, but I can leave that part out for now. There is no multi-touch.

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• Network license control for a Java application

  - by user1461615

  I have been tasked with providing some form of network license control for a Java application. The app would be stored on a network drive and run from a client machine. The basic idea is that it will be able to work out how many times it is being run concurrently and prevent the N+1th user from running the software where N is the number of concurrent licenses the customer has purchased. Is this possible somehow with a Java application? I implemented a "solution" which relied on multi-cast UDP communication between the running instances of the application but this didn't work because on most networks this kind of communication is blocked by security measures. Is there a better way? I don't even mind if it requires JNI/JNA. N.B. The solution does not have to be that sophisticated or highly secure.

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• How to get top/left x/y of image map with javascript / jquery?

  - by jpea

  Using jQuery's position() or offset(), I can't seeme to get the top/left coordinates of an image map area. It works in FF, but nothing else - no webkit, IE, Opera. $('area').bind("click",function(){ alert($(this).position().left); }); <area shape="rect" coords="14,25,205,150" href="#"> Anyone know of a different way to access these? Normally I would just take the coords and split(",") but there are a bunch of multi-faceted area's on these pages.

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• Very large database, very small portion most being retrieved in real time

  - by mingyeow

  Hi folks, I have an interesting database problem. I have a DB that is 150GB in size. My memory buffer is 8GB. Most of my data is rarely being retrieved, or mainly being retrieved by backend processes. I would very much prefer to keep them around because some features require them. Some of it (namely some tables, and some identifiable parts of certain tables) are used very often in a user facing manner How can I make sure that the latter is always being kept in memory? (there is more than enough space for these) More info: We are on Ruby on rails. The database is MYSQL, our tables are stored using INNODB. We are sharding the data across 2 partitions. Because we are sharding it, we store most of our data using JSON blobs, while indexing only the primary keys

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• Access Denied using TakeOwn.exe

  - by Magnus

  I have got this file that I can't delete. It happened after a system crash, so the CHKDSK kicked in upon next reboot. After that, I can't delete the file. THis is on Windows Home Server, and the file is one of those hidden Thumbs.db, and my WHS reports a "File conflict" on the file, the reason: Access Denied" What I have tried so far, running as an Administrator: Delete: Access Denied TakeOwn.exe : Access Denied Attrib.exe -s -h : Access Denied Icacls.exe : Access Denied Re-boot in to safe mode and tried the above: Access Denied I have used the CHKDSK /f again, rebooted since some suggestions is that the file has been corrupted, but that didn't change anything. Any suggestions ?

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• AD DS or AD LDS

  - by rajeevrautela

  Hi all, Greeetings !!! I need a suggestion about having AD DS or AD LDS for my infrastructure. So lets begin, Ex. I am having a website which as of now do not have any log in facility for the visitors, now we are developing a new application so that the visitors can create account on the website. the best example you can think of is of any telecom service provider, they have their webiste and now is creating a login facility for it's customers so the users can create an account and can subscribe for ebill sort of facilties. Hope the situation is clear now. for this particular application, i intend to have a web server, an application server, a DB server, one SMTP server and one AD server(for authentication of users and for saving the profiles also). My question here starts on AD front, here do i need AD DS or AD LDS here, what i need from AD is 1) provide user authentication, 2) provide role based access. this is my query. hope i'll get the answer very soon.

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• Installing MySQL on Ubuntu 12 fails on a clean installation

  - by Keenora Fluffball

  I do have the problem, that even if I uninstall mysql completely and do a restart, it still doesn't install mysql. This is the error I get: Paketlisten werden gelesen... Fertig Abhängigkeitsbaum wird aufgebaut Statusinformationen werden eingelesen... Fertig Die folgenden zusätzlichen Pakete werden installiert: libdbd-mysql-perl libmysqlclient18 mysql-client-5.5 mysql-client-core-5.5 mysql-common mysql-server-5.5 mysql-server-core-5.5 Vorgeschlagene Pakete: tinyca mailx Die folgenden NEUEN Pakete werden installiert: libdbd-mysql-perl libmysqlclient18 mysql-client-5.5 mysql-client-core-5.5 mysql-common mysql-server mysql-server-5.5 mysql-server-core-5.5 0 aktualisiert, 8 neu installiert, 0 zu entfernen und 0 nicht aktualisiert. Es müssen 26,2 MB an Archiven heruntergeladen werden. Nach dieser Operation werden 94,2 MB Plattenplatz zusätzlich benutzt. Möchten Sie fortfahren [J/n]? J Hole:1 http://de.archive.ubuntu.com/ubuntu/ quantal-updates/main mysql-common all 5.5.28-0ubuntu0.12.10.1 [13,4 kB] Hole:2 http://de.archive.ubuntu.com/ubuntu/ quantal-updates/main libmysqlclient18 amd64 5.5.28-0ubuntu0.12.10.1 [949 kB] Hole:3 http://de.archive.ubuntu.com/ubuntu/ quantal/main libdbd-mysql-perl amd64 4.021-1 [97,7 kB] Hole:4 http://de.archive.ubuntu.com/ubuntu/ quantal-updates/main mysql-client-core-5.5 amd64 5.5.28-0ubuntu0.12.10.1 [1.941 kB] Hole:5 http://de.archive.ubuntu.com/ubuntu/ quantal-updates/main mysql-client-5.5 amd64 5.5.28-0ubuntu0.12.10.1 [8.332 kB] Hole:6 http://de.archive.ubuntu.com/ubuntu/ quantal-updates/main mysql-server-core-5.5 amd64 5.5.28-0ubuntu0.12.10.1 [5.983 kB] Hole:7 http://de.archive.ubuntu.com/ubuntu/ quantal-updates/main mysql-server-5.5 amd64 5.5.28-0ubuntu0.12.10.1 [8.842 kB] Hole:8 http://de.archive.ubuntu.com/ubuntu/ quantal-updates/main mysql-server all 5.5.28-0ubuntu0.12.10.1 [11,6 kB] Es wurden 26,2 MB in 1 min 5 s geholt (399 kB/s) Vorkonfiguration der Pakete ... Vormals nicht ausgewähltes Paket mysql-common wird gewählt. (Lese Datenbank ... 68073 Dateien und Verzeichnisse sind derzeit installiert.) Entpacken von mysql-common (aus .../mysql-common_5.5.28-0ubuntu0.12.10.1_all.deb) ... Vormals nicht ausgewähltes Paket libmysqlclient18:amd64 wird gewählt. Entpacken von libmysqlclient18:amd64 (aus .../libmysqlclient18_5.5.28-0ubuntu0.12.10.1_amd64.deb) ... Vormals nicht ausgewähltes Paket libdbd-mysql-perl wird gewählt. Entpacken von libdbd-mysql-perl (aus .../libdbd-mysql-perl_4.021-1_amd64.deb) ... Vormals nicht ausgewähltes Paket mysql-client-core-5.5 wird gewählt. Entpacken von mysql-client-core-5.5 (aus .../mysql-client-core-5.5_5.5.28-0ubuntu0.12.10.1_amd64.deb) ... Vormals nicht ausgewähltes Paket mysql-client-5.5 wird gewählt. Entpacken von mysql-client-5.5 (aus .../mysql-client-5.5_5.5.28-0ubuntu0.12.10.1_amd64.deb) ... Vormals nicht ausgewähltes Paket mysql-server-core-5.5 wird gewählt. Entpacken von mysql-server-core-5.5 (aus .../mysql-server-core-5.5_5.5.28-0ubuntu0.12.10.1_amd64.deb) ... Trigger für man-db werden verarbeitet ... mysql-common (5.5.28-0ubuntu0.12.10.1) wird eingerichtet ... Vormals nicht ausgewähltes Paket mysql-server-5.5 wird gewählt. (Lese Datenbank ... 68251 Dateien und Verzeichnisse sind derzeit installiert.) Entpacken von mysql-server-5.5 (aus .../mysql-server-5.5_5.5.28-0ubuntu0.12.10.1_amd64.deb) ... Vormals nicht ausgewähltes Paket mysql-server wird gewählt. Entpacken von mysql-server (aus .../mysql-server_5.5.28-0ubuntu0.12.10.1_all.deb) ... Trigger für man-db werden verarbeitet ... Trigger für ureadahead werden verarbeitet ... libmysqlclient18:amd64 (5.5.28-0ubuntu0.12.10.1) wird eingerichtet ... libdbd-mysql-perl (4.021-1) wird eingerichtet ... mysql-client-core-5.5 (5.5.28-0ubuntu0.12.10.1) wird eingerichtet ... mysql-client-5.5 (5.5.28-0ubuntu0.12.10.1) wird eingerichtet ... mysql-server-core-5.5 (5.5.28-0ubuntu0.12.10.1) wird eingerichtet ... mysql-server-5.5 (5.5.28-0ubuntu0.12.10.1) wird eingerichtet ... AppArmor parser error for /etc/apparmor.d/usr.sbin.mysqld in /etc/apparmor.d/usr.sbin.mysqld at line 9: >>abstractions/mysql<< konnte nicht ge?ffnet werden start: Job failed to start invoke-rc.d: initscript mysql, action "start" failed. dpkg: Fehler beim Bearbeiten von mysql-server-5.5 (--configure): Unterprozess installiertes post-installation-Skript gab den Fehlerwert 1 zurück dpkg: Abhängigkeitsprobleme verhindern Konfiguration von mysql-server: mysql-server hängt ab von mysql-server-5.5; aber: Paket mysql-server-5.5 ist noch nicht konfiguriert. dpkg: Fehler beim Bearbeiten von mysql-server (--configure): Abhängigkeitsprobleme - verbleibt unkonfiguriert Trigger für libc-bin werden verarbeitet ... ldconfig deferred processing now taking place Es wurde kein Apport-Bericht verfasst, da die Fehlermeldung darauf hindeutet, dass dies lediglich ein Folgefehler eines vorherigen Problems ist. Fehler traten auf beim Bearbeiten von: mysql-server-5.5 mysql-server E: Sub-process /usr/bin/dpkg returned an error code (1) Do you have any clue, whats going on here?

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• SQL 2008 Database tuning advisor won’t start

  - by Andrew Hancox

  For some reason I can't get DTA to connect to my development machine. It connects to a remote DB just fine but when I point it to my dev machine I get an error saying: Failed to initialize MSDB database for tuning (exit code: -1073741819). I'm pretty sure it's not a permissions issue since I've used profiler to capture what it's doing and all of the commands it's run so far look fine and are being run under my account which is associated with the sysadmin role, when I run them in sql management studio they go through fine. I'm pretty convinced that the problem is related to creating the objects in MSDB that are used by DTA but I tried creating these manually (I found scripts on the web) and it just seems to push the problem along the line slightly. I'm going out of my mind - have even tried reinstalling SQL but that's not fixed it. I'm using SQL 2008 with SP1 (10.0.2531) on windows server 2008 (patched up to date). SAVE ME!!!!!

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• What's the most efficient way to reclaim disk space after deleting lots of data from a database on Sybase ASE 15?

  - by Ernie Longmire

  As I understand it, based on some research but zero real-world experience with Sybase ASE, the only way to reclaim disk space once it's been allocated to a database is to export that database, create a new DB with the same schema, and reload all the exported data to the new database. Is this correct, or is there some other method? Then: assuming the above is correct and a full export-recreate-reload is required, what's the most efficient way to do that? Are there tools that will automate all or part of that process? I'm being told we would have to write separate bcp export and import commands for each and every object in the database, which if true sounds easily scriptable by someone who knows Sybase ASE well enough. (I don't.) This seems to me like a really basic housekeeping task, and it feels like I'm missing something obvious.

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