78 lines
3.8 KiB
C#
78 lines
3.8 KiB
C#
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namespace Microsoft.Build.Tasks.Xaml
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{
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using System;
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using System.Globalization;
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using System.Runtime;
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using System.Runtime.Remoting.Lifetime;
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using XamlBuildTask;
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internal static class XamlBuildTaskLeaseLifetimeHelper
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{
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const string RemotingLeaseLifetimeInMinutesEnvironmentVariableName = "XamlBuildTaskTimeoutInMinutes";
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// In order to take advantage of the XamlBuildTaskRemotingLeaseLifetimeInMinutes environment variable from an MSBuild
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// project file (e.g. csproj file), the following needs to be added to that project file:
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//
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// After the initial "<Project ..." line:
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// <UsingTask TaskName="MySetEnv" TaskFactory="CodeTaskFactory" AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v4.0.dll" >
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// <ParameterGroup>
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// <Name Required="true" />
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// <Value Required="false" />
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// </ParameterGroup>
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// <Task>
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// <Code Type="Fragment" Language="cs">System.Environment.SetEnvironmentVariable(Name, Value);</Code>
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// </Task>
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// </UsingTask>
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//
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// And at the end of the project file, before the closing </Project> :
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//
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// <Target Name="BeforeBuild">
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// <MySetEnv Name="XamlBuildTaskTimeoutInMinutes" Value="24" />
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// </Target>
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// <Target Name="AfterBuild">
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// <MySetEnv Name="XamlBuildTaskRemotingLeaseLifetimeInMinutes" Value="" />
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// </Target>
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//
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// This example uses a task name of "MySetEnv", but it that name could be anything desired.
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// It also sets the timeout to 24 minutes, as defined as the Value specified to the MySetEnv task.
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// The AfterBuild target is not required, but is probably desired so that the environment variable setting
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// does not persist after the processing of this particular project file.
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// The valid values for the environment variable are numbers between 1 and 2147483647 inclusive
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// (positive 32-bit integers). Any other value will result in no change to the lease lifetime.
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internal static void SetLeaseLifetimeFromEnvironmentVariable(ILease lease)
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{
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// We can only change the lease lifetime if we have an ILease and it is still in the Initial state.
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if ((lease != null) && (lease.CurrentState == LeaseState.Initial))
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{
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try
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{
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string remotingLeaseLifetimeInMinutesStringValue = Environment.GetEnvironmentVariable(RemotingLeaseLifetimeInMinutesEnvironmentVariableName);
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if (!string.IsNullOrEmpty(remotingLeaseLifetimeInMinutesStringValue))
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{
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int remotingLeaseLifetimeInMinutes = -1;
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if (Int32.TryParse(remotingLeaseLifetimeInMinutesStringValue, NumberStyles.Integer, CultureInfo.InvariantCulture, out remotingLeaseLifetimeInMinutes))
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{
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// revert to the defauilt if the number specified is less than or equal to 0.
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if (remotingLeaseLifetimeInMinutes > 0)
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{
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lease.InitialLeaseTime = TimeSpan.FromMinutes(remotingLeaseLifetimeInMinutes);
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lease.RenewOnCallTime = TimeSpan.FromMinutes(remotingLeaseLifetimeInMinutes);
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}
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}
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}
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}
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catch (Exception ex)
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{
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// simply ignore any exceptions that might have occurred and go with the default. We can't log it because
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// we aren't initialized enough at this point.
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if (Fx.IsFatal(ex))
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{
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throw;
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}
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}
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}
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}
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}
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}
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