static void CompileExpressions(Activity activity)
{
// activityName is the Namespace.Type of the activity that contains the
// C# expressions.
string activityName = activity.GetType().ToString();
// Split activityName into Namespace and Type.Append _CompiledExpressionRoot to the type name
// to represent the new type that represents the compiled expressions.
// Take everything after the last . for the type name.
string activityType = activityName.Split('.').Last() + "_CompiledExpressionRoot";
// Take everything before the last . for the namespace.
string activityNamespace = string.Join(".", activityName.Split('.').Reverse().Skip(1).Reverse());
// Create a TextExpressionCompilerSettings.
TextExpressionCompilerSettings settings = new TextExpressionCompilerSettings
{
Activity = activity,
Language = "C#",
ActivityName = activityType,
ActivityNamespace = activityNamespace,
RootNamespace = null,
GenerateAsPartialClass = false,
AlwaysGenerateSource = true,
ForImplementation = false
};
// Compile the C# expression.
TextExpressionCompilerResults results =
new TextExpressionCompiler(settings).Compile();
// Any compilation errors are contained in the CompilerMessages.
if (results.HasErrors)
{
throw new Exception("Compilation failed.");
}
// Create an instance of the new compiled expression type.
ICompiledExpressionRoot compiledExpressionRoot =
Activator.CreateInstance(results.ResultType,
new object[] { activity }) as ICompiledExpressionRoot;
// Attach it to the activity.
CompiledExpressionInvoker.SetCompiledExpressionRoot(
activity, compiledExpressionRoot);
}
static WorkflowService CreatetWorkflowServiceAndSetCompiledExpressionRoot(string supportedVersionXamlxfilePath, Stream activityStream, XName defaultServiceName)
{
WorkflowService service = CreatetWorkflowService(activityStream, defaultServiceName);
if (service != null)
{
// CompiledExpression is not supported on Configuration Based Activation (CBA) scenario.
if (ServiceHostingEnvironment.IsHosted && !ServiceHostingEnvironment.IsConfigurationBased)
{
// We use ServiceHostingEnvironment.FullVirtualPath (instead of the constructor string) because we’re passing this path to BuildManager,
// which may not understand the file type referenced by the constructor string (e.g. .xaml).
ICompiledExpressionRoot expressionRoot = XamlBuildProviderExtension.GetExpressionRoot(supportedVersionXamlxfilePath, service, ServiceHostingEnvironment.FullVirtualPath);
if (expressionRoot != null)
{
CompiledExpressionInvoker.SetCompiledExpressionRoot(service.Body, expressionRoot);
}
}
}
return(service);
}
private static void Compile(Activity activity)
{
string activityName = activity.GetType().ToString();
string activityType = activityName.Split('.').Last() + "_CompiledExpressionRoot";
string activityNamespace = string.Join(".", activityName.Split('.').Reverse().Skip(1).Reverse());
var settings = new TextExpressionCompilerSettings
{
Activity = activity,
Language = "C#",
ActivityName = activityType,
ActivityNamespace = activityNamespace,
RootNamespace = null,
GenerateAsPartialClass = false,
AlwaysGenerateSource = true,
ForImplementation = false,
#if NET5_0
Compiler = new CSharpAotCompiler()
#endif
};
var results = new TextExpressionCompiler(settings).Compile();
if (results.HasErrors)
{
foreach (var m in results.CompilerMessages)
{
System.Diagnostics.Debug.WriteLine(m.Message);
}
throw new Exception("Compilation failed.");
}
var compiledExpressionRoot = Activator.CreateInstance(results.ResultType, new object[] { activity }) as ICompiledExpressionRoot;
CompiledExpressionInvoker.SetCompiledExpressionRoot(activity, compiledExpressionRoot);
}
public void Compile(string activityNamespace, string activityName, Activity activity, bool forImplementation = true)
{
if (_refAssemblies != null)
{
var references = _refAssemblies.Select(a => new AssemblyReference {
Assembly = a
}).ToArray();
if (!forImplementation)
{
TextExpression.SetReferences(activity, references);
}
else
{
TextExpression.SetReferencesForImplementation(activity, references);
}
}
if (_usingNamespaces != null)
{
var namespaces = _usingNamespaces.ToArray();
if (!forImplementation)
{
TextExpression.SetNamespaces(activity, namespaces);
}
else
{
TextExpression.SetNamespacesForImplementation(activity, namespaces);
}
}
var settings = new TextExpressionCompilerSettings
{
Activity = activity,
Language = "C#",
ActivityName = activityName,
ActivityNamespace = activityNamespace,
RootNamespace = "dd",
GenerateAsPartialClass = false,
AlwaysGenerateSource = false,
ForImplementation = forImplementation,
Compiler = new CSharpAheadOfTimeCompiler(),
};
var results = new TextExpressionCompiler(settings).Compile();
if (results.HasErrors)
{
throw new Exception("Compilation failed.");
}
if (results.ResultType == null)
{
return;
}
var compiledExpressionRoot =
Activator.CreateInstance(results.ResultType, activity) as ICompiledExpressionRoot;
if (!forImplementation)
{
CompiledExpressionInvoker.SetCompiledExpressionRoot(activity, compiledExpressionRoot);
}
else
{
CompiledExpressionInvoker.SetCompiledExpressionRootForImplementation(activity, compiledExpressionRoot);
}
}
