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  • EmblaCom Oy Maximizes Database Availability and Reduces Costs with MySQL Cluster

    - by Bertrand Matthelié
    Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Headquartered in Finland, EmblaCom Oy provides turnkey and cloud-hosted voice solutions to mobile operators around the globe. Since launching the original mobile private branch exchange (PBX) in 1998, the company has focused on helping its partners provide efficient voice communications to their key business customers. The company’s voice solutions are used by millions of subscribers, worldwide. EmblaCom Oy needed to replace several database engines with a standardized, scalable, development-friendly database solution to maximize availability and cut costs. The company chose MySQL Cluster Carrier Grade Edition, which has maximized accessibility to EmblaCom’s services for its clients and their hundreds of thousands of subscribers. The initiative has also reduced, by half, the cost of the database solution installation for customers, as well as lowered maintenance and customer service costs. Read the entire case study here.

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  • Returning a flexible datatype from a C++ function

    - by GavinH
    I'm developing for a legacy C++ application which uses ODBC for it's data access. Coming from a C# background, I really miss the ADO style of data access. I'm writing a wrapper (because we can't actually use ADO) to make our data access less painful. This means no char arrays, no manual text blob streaming, and no declaritive column binding. I'm struggling with how to store / return data values. In C# at least, you can declare an object and cast it to whatever (as long as the type is convertable). My current C++ solution is to use boost::any to store the data value in a custom DataColumnValue object. This class has conversion and assignment operators to the various types used in our app (more than 10). There's a bit of complexity here because if you store an int in the boost::any and try to boost::any_cast<long> you get a boost::bad_any_cast. Client objects shouldn't have to know how the value is stored internally. Does anyone have any experience trying to store / return values whose types are only known at runtime? Is there a better / cleaner way?

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  • an error in .profile file prevents the system from booting?

    - by nafaa
    I tryied to set the JAVA_HOME environmet variable in the ~/.profile file and I made a mistake JAVA_HOME="/usr/lib/jvm/jdk1.6.0_37" PATH=$JAVA_HOME:PATH the error is in the PATH referencing. I put PATH rather than $PATH. this prevents me from login. I tried to edit the file using the recovery mode but it says that the file system is read only. so any suggestions how to deal with this issue. thanks

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  • 13.04: update-initramfs works but mkinitramfs fails from APT

    - by Phil2.0
    I'm experiencing a strange thing, I've freshly upgraded from 12.10 to 13.04, Everything is fine except that it can't build the initrd image automatically, it fails and prints out the mkinitramfs's Usage output. I tried to debug the "mkinitramfs" script and it appears the $outfile variable is never set. However, I'm able to produce the ramdisk manually like follow: update-initramfs -c -u 3.0.8-23-generic I tried most of the stuff seen on the net: purge, reinstall but no help but nothing, and I can't use linux-image is marked as "broken" but the kernel exists in /boot.

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  • MySQL Prepared Statements to Generate Crosstab SQL

    <b>Database Journal:</b> "MySQL Reporting requirements sometimes require both unknown column and row values, necessitating a more powerful means of generating crosstabs. Today's article presents Prepared Statements, which dynamically generate the SQL and assign it to a variable so that we can tailor the output based on the number of data values."

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  • MySQL Prepared Statements to Generate Crosstab SQL

    MySQL Reporting requirements sometimes require both unknown column and row values, necessitating a more powerful means of generating crosstabs. Today's article presents Prepared Statements, which dynamically generate the SQL and assign it to a variable so that we can tailor the output based on the number of data values.

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  • MySQL Prepared Statements to Generate Crosstab SQL

    MySQL Reporting requirements sometimes require both unknown column and row values, necessitating a more powerful means of generating crosstabs. Today's article presents Prepared Statements, which dynamically generate the SQL and assign it to a variable so that we can tailor the output based on the number of data values.

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  • In C and C++, what methods can prevent accidental use of the assignment(=) where equivalence(==) is needed?

    - by DeveloperDon
    In C and C++, it is very easy to write the following code with a serious error. char responseChar = getchar(); int confirmExit = 'y' == tolower(responseChar); if (confirmExit = 1) { exit(0); } The error is that the if statement should have been: if (confirmExit == 1) As coded, it will exit every time, because the assignment of the confirmExit variable occurs, then confirmExit is used as the result of the expression. Are there good ways to prevent this kind of error?

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  • when including a file using php function not work?

    - by John Smiith
    MY PHP FUNCTION IS function functionName() { include($_SERVER['DOCUMENT_ROOT']."/path/file.php"); } Content of File.php is $foo = 'bar'; Calling function (content of file test.php) functionName(); When call function and variable not work echo $foo; <- not works But when adding code below its works (content of file test.php) include($_SERVER['DOCUMENT_ROOT']."/path/file.php"); echo $foo; <- its works

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  • Is there a more elegant way to apply conditions in nginx?

    - by Ryan Detzel
    Is there a better way to do this? I can't find a way to nest or apply boolean operators to conditions in nginx. Basically if there is a cookie set(non-anonymous user) we want to hit the server. If the cookie is not set and the file exists we want to server the file otherwise hit the server. set $test "D"; if ($http_cookie ~* "session" ) { set $test "${test}C"; } if (-f $request_filename/index.html$is_args$args) { set $test "${test}F"; } if ($test = DF){ rewrite (.*)/ $1/index.html$is_args$args? break; } if ($test = DCF){ proxy_pass http://django; break; } if ($test = DC){ proxy_pass http://django; break; } if ($test = D){ proxy_pass http://django; break; }

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  • More than 5 custom variables across multiple websites using Google Analytics

    - by brakes
    We have multiple websites using the same Google Analytics account number so we can track visitors across multiple websites. One of these websites has set 5 custom variables. We want to introduce a new custom variable to track logged in users for our single sign-on (SSO) system to find out what parts of which website they are accessing. Is this possible or is it a case that all the custom variables have been used up by 1 of the sites?

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  • Comparison in Monit Permissions Testing

    - by beanland
    I'm trying to use Monit to check the permissions of a particular directory, but I only care that it's readable to all users. I don't care about any other permissions (write, execute) for the owner, group, or all. I also don't care about any special permissions. Knowing that I can't change the permissions of this directory, and with the possibility of another administrator changing these permissions without affecting my processes that rely on this directory (i.e., granting or revoking write access to the group), is it possible to check for a minimum permission in Monit? I have this which is currently working: check directory archive path /var/home/archive/ if failed perm 0755 then alert But I would like to have something like tihs: check directory archive path /var/home/archive/ if failed perm > 444 then alert This is failing for me. Is it possible to use comparison operators in Monit's permissions checking? If not, are there any workarounds?

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  • How to grep (or find) on cPanel?

    - by San
    How can I search for a specific string (function name or a variable name) in my files which are in various directories under cPanel file manager? I have been using a library directory and functions on that directory are used in various apps and pages. Now, I am in a situation to change something in the library file, for which I need to know the impact on files which use this library file functions. How to search / find / grep through the files hosted?

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  • Why lambdas seem broken in multithreaded environments (or how closures in C# works).

    Ive been playing around with some code for.NET 3.5 to enable us to split big operations into small parallel tasks. During this work I was reminded why Resharper has the Access to modified closure warning. This warning tells us about a inconsistency in handling the Immutable loop variable created in a foreach loop when lambdas [...]...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Row Count Plus Transformation

    As the name suggests we have taken the current Row Count Transform that is provided by Microsoft in the Integration Services toolbox and we have recreated the functionality and extended upon it. There are two things about the current version that we thought could do with cleaning up Lack of a custom UI You have to type the variable name yourself In the Row Count Plus Transformation we solve these issues for you.

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  • an error in .profile ubuntu file prevents the system from booting?

    - by nafaa
    I tryied to set the JAVA_HOME environmet variable in the ~/.profile file and I made a mistake JAVA_HOME="/usr/lib/jvm/jdk1.6.0_37" PATH=$JAVA_HOME:PATH the error is in the PATH referencing. I put PATH rather than $PATH. this prevents me from login. I tried to edit the file using the recovery mode but it says that the file system is read only. so any suggestions how to deal with this issue. thanks

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  • Const references when dereferencing iterator on set, starting from Visual Studio 2010

    - by Patrick
    Starting from Visual Studio 2010, iterating over a set seems to return an iterator that dereferences the data as 'const data' instead of non-const. The following code is an example of something that does compile on Visual Studio 2005, but not on 2010 (this is an artificial example, but clearly illustrates the problem we found on our own code). In this example, I have a class that stores a position together with a temperature. I define comparison operators (not all them, just enough to illustrate the problem) that only use the position, not the temperature. The point is that for me two instances are identical if the position is identical; I don't care about the temperature. #include <set> class DataPoint { public: DataPoint (int x, int y) : m_x(x), m_y(y), m_temperature(0) {} void setTemperature(double t) {m_temperature = t;} bool operator<(const DataPoint& rhs) const { if (m_x==rhs.m_x) return m_y<rhs.m_y; else return m_x<rhs.m_x; } bool operator==(const DataPoint& rhs) const { if (m_x!=rhs.m_x) return false; if (m_y!=rhs.m_y) return false; return true; } private: int m_x; int m_y; double m_temperature; }; typedef std::set<DataPoint> DataPointCollection; void main(void) { DataPointCollection points; points.insert (DataPoint(1,1)); points.insert (DataPoint(1,1)); points.insert (DataPoint(1,2)); points.insert (DataPoint(1,3)); points.insert (DataPoint(1,1)); for (DataPointCollection::iterator it=points.begin();it!=points.end();++it) { DataPoint &point = *it; point.setTemperature(10); } } In the main routine I have a set to which I add some points. To check the correctness of the comparison operator, I add data points with the same position multiple times. When writing the contents of the set, I can clearly see there are only 3 points in the set. The for-loop loops over the set, and sets the temperature. Logically this is allowed, since the temperature is not used in the comparison operators. This code compiles correctly in Visual Studio 2005, but gives compilation errors in Visual Studio 2010 on the following line (in the for-loop): DataPoint &point = *it; The error given is that it can't assign a "const DataPoint" to a [non-const] "DataPoint &". It seems that you have no decent (= non-dirty) way of writing this code in VS2010 if you have a comparison operator that only compares parts of the data members. Possible solutions are: Adding a const-cast to the line where it gives an error Making temperature mutable and making setTemperature a const method But to me both solutions seem rather 'dirty'. It looks like the C++ standards committee overlooked this situation. Or not? What are clean solutions to solve this problem? Did some of you encounter this same problem and how did you solve it? Patrick

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  • Overloading stream insertion without violating information hiding?

    - by Chris
    I'm using yaml-cpp for a project. I want to overload the << and >> operators for some classes, but I'm having an issue grappling with how to "properly" do this. Take the Note class, for example. It's fairly boring: class Note { public: // constructors Note( void ); ~Note( void ); // public accessor methods void number( const unsigned long& number ) { _number = number; } unsigned long number( void ) const { return _number; } void author( const unsigned long& author ) { _author = author; } unsigned long author( void ) const { return _author; } void subject( const std::string& subject ) { _subject = subject; } std::string subject( void ) const { return _subject; } void body( const std::string& body ) { _body = body; } std::string body( void ) const { return _body; } private: unsigned long _number; unsigned long _author; std::string _subject; std::string _body; }; The << operator is easy sauce. In the .h: YAML::Emitter& operator << ( YAML::Emitter& out, const Note& v ); And in the .cpp: YAML::Emitter& operator << ( YAML::Emitter& out, const Note& v ) { out << v.number() << v.author() << v.subject() << v.body(); return out; } No sweat. Then I go to declare the >> operator. In the .h: void operator >> ( const YAML::Node& node, Note& note ); But in the .cpp I get: void operator >> ( const YAML::Node& node, Note& note ) { node[0] >> ? node[1] >> ? node[2] >> ? node[3] >> ? return; } If I write things like node[0] >> v._number; then I would need to change the CV-qualifier to make all of the Note fields public (which defeats everything I was taught (by professors, books, and experience))) about data hiding. I feel like doing node[0] >> temp0; v.number( temp0 ); all over the place is not only tedious, error-prone, and ugly, but rather wasteful (what with the extra copies). Then I got wise: I attempted to move these two operators into the Note class itself, and declare them as friends, but the compiler (GCC 4.4) didn't like that: src/note.h:44: error: ‘YAML::Emitter& Note::operator<<(YAML::Emitter&, const Note&)’ must take exactly one argument src/note.h:45: error: ‘void Note::operator(const YAML::Node&, Note&)’ must take exactly one argument Question: How do I "properly" overload the >> operator for a class Without violating the information hiding principle? Without excessive copying?

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  • Type for use in template object to compare double values

    - by DaClown
    I got this n-dimensional point object: template <class T, unsigned int dimension> class Obj { protected: T coords[dimension]; static const unsigned int size = dimension; public: Obj() { }; Obj(T def) { for (unsigned int i = 0; i < size; ++i) coords[i]=def; }; Obj(const Obj& o) { for (unsigned int i = 0; i < size; ++i) coords[i] = o.coords[i]; } const Obj& operator= (const Obj& rhs) { if (this != &rhs) for (unsigned int i = 0; i < size; ++i) coords[i] = rhs.coords[i]; return *this; } virtual ~Obj() { }; T get (unsigned int id) { if (id >= size) throw std::out_of_range("out of range"); return coords[id]; } void set (unsigned int id, T t) { if (id >= size) throw std::out_of_range("out of range"); coords[id] = t; } }; and a 3D point class which uses Obj as base class: template <class U> class Point3DBase : public Obj<U,3> { typedef U type; public: U &x, &y, &z; public: Point3DBase() : x(Obj<U,3>::coords[0]), y(Obj<U,3>::coords[1]), z(Obj<U,3>::coords[2]) { }; Point3DBase(U def) : Obj<U,3>(def), x(Obj<U,3>::coords[0]), y(Obj<U,3>::coords[1]), z(Obj<U,3>::coords[2]) { }; Point3DBase(U x_, U y_, U z_) : x(Obj<U,3>::coords[0]), y(Obj<U,3>::coords[1]), z(Obj<U,3>::coords[2]) { x = x_; y = y_; z= z_; }; Point3DBase(const Point3DBase& other) : x(Obj<U,3>::coords[0]), y(Obj<U,3>::coords[1]), z(Obj<U,3>::coords[2]) { x = other.x; y = other.y; z = other.z; } // several operators ... }; The operators, basically the ones for comparison, use the simple compare-the-member-object approach like: virtual friend bool operator== (const Point3DBase<U> &lhs, const Point3DBase<U> rhs) { return (lhs.x == rhs.x && lhs.y == rhs.y && lhs.z == rhs.z); } Then it occured to me that for the comparion of double values the simply equality approach is not very useful since double values should be compared with an error margin. What would be the best approach to introduce an error margin into the point? I thought about an epsDouble type as template parameter but I can't figure out how to achieve this.

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  • Mod Rewrite Help - Pseudo-Subdirectories

    - by Gimpyfuzznut
    I am dealing with a frustrating problem with Joomla that is going to require some url trickery. The idea is straight-forward but after reading a bunch of guides for mod-rewrite, I still can't seem to get it work. Let's say my site is www.mysite.com. Joomla is already performing some rewriting for SEF urls so I have links like www.mysite.com/home and www.mysite.com/news and so on. I want to be able to have (4) pseudo-subdirectories like www.mysite.com/mode1/ and www.mysite.com/mode2/ and so on. These subdirectories should work as if the subdirectory isn't there, ie both www.mysite.com/mode1/home and www.mysite.com/mode2/home should pull up the same www.mysite.com/home. It should point any www.mysite.com/mode1/anypagehere to www.mysite.com/anypagehere. The reason I am asking for this is because I will be reading the url for mode1, mode2, etc, to modify the template page. There will be a landing page that will direct people to /mode1/ and /mode2/ etc and the template will change based on that. Note, that I don't want to actually pass a parameter to the url accessible by a GET or whatever because Joomla removes it (perhaps because of my current mod_rewrite settings). I've pasted the current .htaccess file. RewriteBase /joomla ##########Rewrite rules to block out some common exploits RewriteCond %{QUERY_STRING} mosConfig_[a-zA-Z_]{1,21}(=|\%3D) [OR] # Block out any script trying to base64_encode crap to send via URL RewriteCond %{QUERY_STRING} base64_encode.*\(.*\) [OR] # Block out any script that includes a <script> tag in URL RewriteCond %{QUERY_STRING} (\<|%3C).*script.*(\>|%3E) [NC,OR] # Block out any script trying to set a PHP GLOBALS variable via URL RewriteCond %{QUERY_STRING} GLOBALS(=|\[|\%[0-9A-Z]{0,2}) [OR] # Block out any script trying to modify a _REQUEST variable via URL RewriteCond %{QUERY_STRING} _REQUEST(=|\[|\%[0-9A-Z]{0,2}) # Send all blocked request to homepage with 403 Forbidden error! RewriteRule ^(.*)$ index.php [F,L] ########## Begin - Joomla! core SEF Section RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_URI} !^/index.php RewriteCond %{REQUEST_URI} (/|\.php|\.html|\.htm|\.feed|\.pdf|\.raw|/[^.]*)$ [NC] RewriteRule (.*) index.php #RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L] ########## End - Joomla! core SEF Section

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  • System Expandable-String Environment Variables Can’t Reference User Environment Variables

    - by Synetech inc.
    Hi, I’ve run into a bit of a situation with Windows environment variables. I’ve narrowed it down to what may or may not makes sense and/or possibly be by design. It seems that expandable-string environment variables of the local machine cannot reference environment variables of the current user. For example if you’ve got the following environment variables: [HKCU\Environment] "CU"="CU" "CU->LM"="%LM%" [HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment] "LM"="LM" "LM->CU"="%CU%" Then you get the following results: > set CU CU=CU CU->LM=LM > set LM LM=LM LM->CU=%CU% It seems that user variables can expand system variable references, but system variables cannot expand (access?) user variable references. I suppose that it makes sense if you think about it just right (eg like how user vars override/hide system vars of the same name), but it also doesn’t make sense if you think about it in even more ways. So what’s going on? Is there a way to get this to work as expected? Thanks.

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  • Apache2 - mod_rewrite : RequestHeader and environment variables

    - by Guillaume
    I try to get the value of the request parameter "authorization" and to store it in the header "Authorization" of the request. The first rewrite rule works fine. In the second rewrite rule the value of $2 does not seem to be stored in the environement variable. As a consequence the request header "Authorization" is empty. Any idea ? Thanks. <VirtualHost *:8010> RewriteLog "/var/apache2/logs/rewrite.log" RewriteLogLevel 9 RewriteEngine On RewriteRule ^/(.*)&authorization=@(.*)@(.*) http://<ip>:<port>/$1&authorization=@$2@$3 [L,P] RewriteRule ^/(.*)&authorization=@(.*)@(.*) - [E=AUTHORIZATION:$2,NE] RequestHeader add "Authorization" "%{AUTHORIZATION}e" </VirtualHost> I need to handle several cases because sometimes parameters are in the path and sometines they are in the query. Depending on the user. This last case fails. The header value for AUTHORIZATION looks empty. # if the query string includes the authorization parameter RewriteCond %{QUERY_STRING} ^(.*)authorization=@(.*)@(.*)$ # keep the value of the parameter in the AUTHORIZATION variable and redirect RewriteRule ^/(.*) http://<ip>:<port>/ [E=AUTHORIZATION:%2,NE,L,P] # add the value of AUTHORIZATION in the header RequestHeader add "Authorization" "%{AUTHORIZATION}e"

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