Lazarus windows service

Lazarus Handbook. Advanced search. Getting started with a se TyneBridges Full Member Posts: Lazdaemon is useful to have as a Lazarus application type but it presents lots of challenges to less capable programmers like me. A timer must be one of the most frequently used elements within a service and I have seen several threads on this, but only very general information on how it can be done. By default, timer events are ignored in a service because the main thread has no message queue.

OnCreate and Timer. OnTimer - isn't clear to me. Is anyone prepared to share their code, or point me to an example that shows how to run a timer presumably FPTimer in a service?

I'm sure this would be valuable to many forum readers. ChrisF Hero Member Posts: For instance, this is a quick sample for a console program, emulating the function of a timer with this kind of solution.

I guess it should also work the same way in a windows service. Code: [Select]. Thanks, Chris! That turned out to be just what I was looking for and I think others will find it useful as well. I'm indebted to you. Unfortunately I spoke too soon. Once I added a SimpleIPC client to my code I found that the service was crashing unexpectedly, which seems to be because my IPC client was within the data module definition and the thread that tried to start it wasn't a property of the module.

However, when I amended the code on the following lines using the proper practice of defining all methods within objects where appropriate , I found that it wouldn't compile. I've discovered unsurprisingly that Self. TimerThread and Self. TimerThread don't compile either. A snapshot of the Lazarus development version source is available from the official GitLab repository.

Other, previously available snapshot 'servers', are mentioned here snapshot servers. Not recommended. Prerequisite for building Lazarus is that a recent FPC installation must be available. If you already have a Lazarus release installation on your disk - here you can find the FPC in the equally named folder of the installation directory. Make sure that the FPC version number is adequate.

If not, install a newer Lazarus release which is always recommended. Or, of course, you can also install FPC separately. You are also strongly recommended to install the FPC source as well, not absolutely essential but very handy. You should also be aware that the bitness of the FPC determines the bitness of the Lazarus IDE and the bitness of the applications that you will create. So, when your fpc. Before you start the new IDE you should make sure that it does not interfere with your current other Lazarus installation s.

Lazarus writes is configuration settings to this folder if you open the lazarus. Since it is easy to forget this command line parameter it is highly recommended to add a file lazarus. This is also how the Lazarus release versions handle secondary installations. Starting Lazarus in the directory containing that lazarus. When you start the new IDE for the first time probably there will be an error message saying that the FPC and the debugger cannot be found.

In this error dialog, navigate to the folder which you had used as the path to build the IDE, and select the fpc.

As for the debugger, navigate to the mingw folder of your Lazarus release installation or install gdb separately and select the gdb. There may also be a message about an issue with the fppkg configuration - click "Restore fppkg configuration" to resolve this. The meta data interface provides a way to add custom data to recorded ones. A repository's extended meta data has to be registered after the service meta data recorded in the resource file have been registered.

The Direction property indicate whether it is an incoming header or an outgoing one. The mustUnderstand property define whether the header is a mandatory one. They have to be registered in the type registry. The AddHeader method allows headers sending while the GetHeader method retrieves header in the call context. A header may be made mandatory by setting its mustUnderstand property to 1 as in the code above.

When the runtime is about to issue a call against a implementation class instance, it queries that instance for ICallControl interface support; If the implementation has ICallControl interface support then the obtained reference is used to set the call context through the SetCallContext method.

The implementation instance can then access the call context by calling the GetCallContex method. The toolkit provides the TBaseServiceImplementation class which has support for the ICallControl interface and can be used as a base implementation class. The method printed below, extracted from the calculator sample service demonstrates the access to headers for read and write.

The binding style is used to indicate whether the service is RPC oriented or Document oriented. The binding style may be specified in the SOAP protocol string on the creation of a service proxy. The default value for the binding style is RPC. Below is printed a sample code that demonstrates the use of Document style. The encoding style indicates the rules used to encode types in XML.

Supported values are Encoded and Literal. The encoding style may be specified in the SOAP protocol string on the creation of a service proxy. The default value for the encoding style is Encoded. The above sample demonstrates the use of Literal style. The toolkit is usable for simple types and for class types. This classes have to be registered in the type registry. This serializers has been tested on fpc 2. It uses big endian to stream data. It has support for the following pascal types:.

The toolkit has support for instances of classes derived from TBaseRemotable. TBaseRemotable is the abstract base class used by the formatter interface to allow customization of the serialization. The toolkit provides the TBaseComplexRemotable class which implements serialization for its descendants classes published properties.

This class defines a virtual constructor and mainly two 2 virtual abstract class methods :. TBaseComplexRemotable implements serialization for its descendants classes published properties.

The serialization is based on runtime type information RTTI and can be customized to:. TBaseComplexRemotable allows properties serialization as attributes.