The embedded mode only gives a DefaultCairoConfiguration which is completely different from server.conf, is there a proper way to configure embedded QuestDB in Java application?
You can extend DefaultCairoConfiguration or implement CairoConfiguration. Alternatively, there is PropServerConfiguration, but it's not meant to be used in embedded API (yet, it's possible to do so).
The reference for the configuration parameters is available at https://questdb.io/docs/reference/configuration/
Related
As the title says, could I use marmalade to create a service? Also could I create a service(or alternative) for multiple platforms(IOS and Windows Phone)? Just to note the language I'm planning to use is C++.
I understand so, services is an additional functionality which implemented differently on each platform, and Marmalade's abstraction layer does not provide cross-platform access to this functionality, but you can use Extensions Development Kit (EDK) for implement this. http://docs.madewithmarmalade.com/display/MD/Extensions+Development+Kit+EDK
I am looking for a way to connect to an remote oracle database and read some data from table within a c++ console application.
Can some one give me some hints.
Thnx.
soci, http://soci.sourceforge.net, is a reasonably modern C++ interface that uses the Oracle call interface. And can also connect to other databases ...
The official Oracle website proposes several resources. Amongst others:
Oracle C++ Call Interface
Develop C and C++ Applications with Oracle Database 11g Using OCI
Just google, there are really plenty of tutorials around.
You can either use the Oracle C++ Call Interface (native API) or the Open DataBase Connectivity API. If you want a more high-level wrapper, there are some more convenient interfaces in libraries such as Qt.
Unless it's study purpose or strict requirement with ORACLE DB, I'd suggest you to work with generic classes/services provided with various Microsoft Framework.
Data Access Programming
MFC Database classes
ATL Database classes
Of course ORCACLE C++ IF is also available.
You can use OCCI: http://www.oracle.com/technetwork/database/features/oci/index-090820.html
or OCI: http://www.oracle.com/technetwork/database/features/oci/index.html
or one of many other APIs available.. It really depends on the type of thing you're going to use it for.. You should find a lot of information about the pros/cons of the various APIs through google..
You can try: CODBC. It is an API for Pro*C. Pro*C is a very decent way to connect Oracle and C++.
Currently (2021) actively developed is also OCILIB, I was able to setup the test example in short time.
I am planning to use yui or jquery ui as front end for native c++ applications. I found no bindings present for this purpose. Will it be feasible/possible to do this ? If it is so, then how shall i proceed? please suggest advice.thanks
#rwik - I can see your point and desire to do what you intend and I would presume it to be a wise move to be making at this point in time considering the vast facilities browsers bring to the table as well as other aspects... I know we are in September now and I have come across this pretty late, but this is also for others who have a similar problem...
As far as I know, descending from JavaScript in to C++ is pretty murky, mostly due to the heterogenous nature of Javascript engines [Rhino, Tracemonkey, Spidermonkey, V8, Caracan,Charka, etc] employed by different browsers. But there are indeed ways to do this - depending on how dirty you want to get your hands and, indeed, on your abilities...
If you were to go with Google as a browser, you should take a look at projects such as cproxyv8 - http://code.google.com/p/cproxyv8/ or v8-juice - http://code.google.com/p/v8-juice/ which both offer interesting facilities...
My preference however is with Mozilla - simply because of XML User-Interface Language (XUL) which, if you do not know, allows you to speedily create your own user interfaces by giving direct access to its layout engine. I.e., you can even do away with the browser look and have your own independent layout while still having all browser facilities at your disposal.
With respect to C++/Javascript interaction - projects should exist for all alternatives - it pays to check.
I wish you good luck if you haven't already solved this problem.
I'd recommend QT instead.
However since native C++ has nothing to do with GUI I'm going to assume you are making a library in C++. However Yui is basically just JavaScript as is jQuery. So if you're asking can a web page or script be a C++ application the answer is not really.
What you could do is create a web service which uses your C++ library and exposes an interface for your web based application to call it indirectly.
One way to accomplish this is to embed WebKit into your application and provide your custom C++ functionality via a plugin. Both the WebKit framework on OSX and the Chromium Embedded Framework on Windows allow this style of application development. This allows you to write a UI using local Javascript/HTML files without the need for a webserver.
There are no direct bindings in JQuery and YUI because these libraries run in a web browser. Thus unless you’re planning to write your own browser plugins, the integration with the C++ will happen at the webserver that serves the data to the browser.
You could feed the data from your C++ code directly into JQuery/YUI by building web services directly in C++. But you might want to build a web application that will be serving your JQuery/YUI pages and that act as user interface controller (like in the MVC pattern). Web application languages like Java, PHP, etc. all have ways to call native code. Java has JNDI and in PHP you build extensions that link to C++ code.
I'm thinking of creating an application that can use Firefox as a download manager. Is there any way to control Firefox (add downloads, start/stop downloads, etc) from an external program in C/C++?
If that is not possible, then perhaps an extension that can do that? If an extension is the only way, then how do I communicate with the extension from outside of Firefox?
You're starting with a solution, not a problem. The easier idea is to use XulRunner, the platform on which FireFox is built. You'd effectively implement your own application as a XulRunner plugin and use Necko (the network layer of XulRunner and FireFox) from there.
First of all I suggest that you familiarize yourself with developer.mozilla.org
As far as I understand, most Mozilla platform functions are available through a cross language API known as XPCOM. There's also a plugin API but it's primary aim is to visualize stuff (used by Flash, etc.).
Take a look at Gecko API. It allows third party developers to use the same technology as found in Mozilla.
For downloading files no need to use Firefox. Consider using libcurl.
Take a look at wget.
Background:
I have an application written in native C++ which uses the wxWidgets toolkit's wxODBC database access library which is being removed from all future versions of wxWidgets . I need to replace this with another database access method that supports the assumptions and contraints outlined below. I don't require that the replacement use native DBMS APIs or ODBC under the hood, but it must meet the contraints outlined below.
Assumptions/Constraints
The library must:
Support Native (i.e. unmanaged) C++
32-bit Windows 2000/XP/2003
Visual Studio 2005
Microsoft SQL Server 2000 and 2005
Oracle 9 and 10
Run-time Performance greater than or equal to wxODBC
Single programmer API supporting multiple DBMS (e.g. don't want to write different code for using different DBMS)
Nice but Optional:
64-bit Windows operating systems
32-bit and/or 64-bit Linux operating systems
Microsoft SQL Server 2008
Oracle 11
MySQL
Any additional DBMS
Visual Studio 2008
Open Source
Runtime Performance near or equal to native DBMS API
Question:
What good libraries are available - either free, open source or pay - that support multiple DBMS from a single API including Oracle and Microsoft SQL Server and can be used from native C++?
Please describe any past experiences you have had - good OR bad - with a given library and why you are making your recommendation for or against a given library, especially in regards to the assumptions and contraints above.
See Also:
https://stackoverflow.com/questions/74141/good-orm-for-c-solutions
I use SQLAPI++. Well worth a look.
http://www.sqlapi.com/
A library is http://otl.sourceforge.net/
An employer of mine used it.
I can't tell you how its performance compares with wxODBC, but it might fit your requirements.
You can use SOCI http://soci.sourceforge.net or also Wt::Dbo, http://www.webtoolkit.eu and look at the Wt::Dbo component.
You can check Debea - SQL Database Access and ORM for C++. It has API for wxWidgets built-in.
Qt is also an option. It supports the connections to the servers you want, and quite simple to use.
http://doc.trolltech.com/4.4/sql-driver.html#supported-databases
When using Qt, you don't need to build against all Qt. You can for example just use the SQL part, and leave the whole GUI part outside.
Since it has been recently LGPL-ed, you can also use it for a proprietary application.