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We have generated a Windows service, so we need to install it, and perhaps set it running as part of the deployment process. We should also uninstall any existing service. To install a Windows service, we must write an installer class as part of the code for the application. This is a requirement whether NAnt, an MSI, or something else is used as the deployment tool. The code for this can be examined in the solution, but this is not a primary concern for us. Our concern is to actually perform the installation. This can be done using installutil a utility for this purpose that sits in the .NET Framework folder along with the other .NET utilities, such as ildasm. Installing the service involves a command-line call such as installutil Etomic.VssManager.Service.exe
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An uninstall would be performed with the addition of a /u switch. Unfortunately, there is no specific NAnt task wrapping this utility but we can of course use an <exec> task appropriately to call the utility. This would look as follows: <exec program="${framework::get-framework-directory('net-1.1')}\installutil"> <arg value="${core.environment}\${sys.version}\${solution.name}.Service.exe" /> <arg value="/LogToConsole=false"/> </exec> This call finds the framework directory (here presuming we are using the .NET 1.1 Framework in order to call installutil, passing the name of the service and one additional flag to avoid unnecessary output in order to install the service. Finally, we can start the service with the following task: <servicecontroller action="Start" service="Vss Manager Service" /> So with that, we have taken care of the installation of the service. There is one more interesting detail. The service uses a configuration file in order to operate. Ordinarily, this would need to be placed in the Windows folder since services use this as their working folder. To avoid this, the following line of code appears in the OnStart method for the service, which allows the configuration file to be placed alongside the executable in the same way as, for instance, a Windows application: Directory.SetCurrentDirectory(AppDomain.CurrentDomain.BaseDirectory); In this example, I have not addressed configuration file changes that may be necessary upon deployment. You can find more details of this in 8, which also includes more complex deployment scenarios.
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The above additions for the COM interop and service installer can be added into the deployment script for the service in the configuration target. This target looks like this when completed: <target name="configure" description="Amend configuration settings as necessary"> <readregistry property="vss.api" key="TypeLib\{783CD4E0-9D54-11CF-B8EE-00608CC9A71F}\5.1\0\win32\" hive="ClassesRoot" /> <delete file="${core.environment}\${sys.version}\Interop.SourceSafeTypeLib.dll"/> <tlbimp typelib="${vss.api}" output="${core.environment}\${sys.version}\Interop.SourceSafeTypeLib.dll" namespace="SourceSafeTypeLib" /> <exec program="${framework::get-framework-directory('net-1.1')}\installutil"> <arg value="/u"/>
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<arg value="${core.environment}\${old.version}\${solution.name}.Service.exe"/> <arg value="/LogToConsole=false"/> </exec> <exec program="${framework::get-framework-directory('net-1.1')}\installutil"> <arg value="${core.environment}\${sys.version}\${solution.name}.Service.exe"/> <arg value="/LogToConsole=false"/> </exec> <servicecontroller action="Start" service="Vss Manager Service" /> </target> So the process is as follows: Read the registry to obtain the location of the VSS API. Delete the version of the interop file included with the deployment package. Create a new version of the interop file. Uninstall any existing service. Install the new service. Start the service. To uninstall an old version of the service, we need to pass the old version at the command line. The command line to then move from one version to another might look like this: nant -D:debug=false -D:sys.version=1.0.1.0 -D:old.version=1.0.0.0 Here is the output of the configuration step: ---------- NAnt ---------NAnt 0.85 Copyright (C) 2001-2005 Gerry Shaw http://nant.sourceforge.net Buildfile: file:///Etomic.VSSManager.Deploy.xml Target framework: Microsoft .NET Framework 1.1 Target(s) specified: configure configure: [delete] Deleting file Interop.SourceSafeTypeLib.dll. [exec] Microsoft (R) .NET Framework Installation utility Version 1.1.4322.573
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Copyright (C) Microsoft Corporation 1998-2002. All rights reserved. Uninstalling assembly 'etomic.vssmanager.service.exe'. Affected parameters are: assemblypath = etomic.vssmanager.service.exe logfile = etomic.vssmanager.service.InstallLog Removing EventLog source Vss Manager Service. Attempt to stop service Vss Manager Service. Service Vss Manager Service is being removed from the system... Service Vss Manager Service was successfully removed from the system. Microsoft (R) .NET Framework Installation utility Version 1.1.4322.573 Copyright (C) Microsoft Corporation 1998-2002. All rights reserved. Installing assembly 'etomic.vssmanager.service.exe'. Affected parameters are: assemblypath = etomic.vssmanager.service.exe logfile = etomic.vssmanager.service.InstallLog Installing service Vss Manager Service... Service Vss Manager Service has been successfully installed. Creating EventLog source Vss Manager Service in log Application... Committing assembly 'etomic.vssmanager.service.exe'. Affected parameters are: assemblypath = etomic.vssmanager.service.exe logfile = etomic.vssmanager.service.InstallLog
BUILD SUCCEEDED Total time: 5.7 seconds. Output completed (6 sec consumed) - Normal Termination You should notice that some of the tasks used <tlbimp>, <readregistry>, and <servicecontroller> do not actually produce any output. Once this has been executed, you should be able to see the installed service, as shown in Figure 5-12.
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