private SyntaxNode CreateProxyVaraibleDeclaration(SyntaxGenerator g, GenerationNameTable nameTable, bool isAsync)
{
// var proxy = this.GetProxy();
if (!isAsync)
{
return(g.LocalDeclarationStatement(nameTable[MemberNames.ProxyVariable],
g.InvocationExpression(
g.MemberAccessExpression(
g.ThisExpression(),
g.IdentifierName(nameTable[MemberNames.GetProxyMethod])
)
)
));
}
else
{
// var proxy = await this.GetProxyAsync().ConfigureAwait(false);
return
(g.LocalDeclarationStatement(nameTable[MemberNames.ProxyVariable],
g.AwaitExpression(
g.InvocationExpression(
g.MemberAccessExpression(
g.InvocationExpression(
g.MemberAccessExpression(
g.ThisExpression(),
g.IdentifierName(nameTable[MemberNames.GetProxyAsyncMethod])
)
), "ConfigureAwait"),
g.FalseLiteralExpression()
)
)
));
}
}
private SyntaxNode CreateStaticCloseProxyMethod(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, bool asAsync)
{
//private static void CloseProxy(System.ServiceModel.ICommunicationObject proxy, bool alwaysAbort)
//{
// try
// {
// if (proxy != null && proxy.State != System.ServiceModel.CommunicationState.Closed)
// {
// if (!alwaysAbort && proxy.State != System.ServiceModel.CommunicationState.Faulted)
// {
// proxy.Close();
// }
// else
// {
// proxy.Abort();
// }
// }
// }
// catch (System.ServiceModel.CommunicationException)
// {
// proxy.Abort();
// }
// catch (System.TimeoutException)
// {
// proxy.Abort();
// }
// catch
// {
// proxy.Abort();
// throw;
// }
//}
return(g.MethodDeclaration(
asAsync ? nameTable[MemberNames.CloseProxyAsyncMethod] : nameTable[MemberNames.CloseProxyMethod],
accessibility: Accessibility.Private,
returnType: asAsync ? g.TypeExpression(compilation.RequireType <Task>()) : null,
modifiers: (asAsync ? DeclarationModifiers.Async : DeclarationModifiers.None) | DeclarationModifiers.Static,
parameters: new SyntaxNode[]
{
g.ParameterDeclaration("proxy", g.TypeExpression(compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"))),
g.ParameterDeclaration("alwaysAbort", g.TypeExpression(SpecialType.System_Boolean))
},
statements: new SyntaxNode[]
{
g.TryCatchStatement(
new SyntaxNode[]
{
// if (proxy != null && proxy.State != System.ServiceModel.CommunicationState.Closed)
g.IfStatement(
g.LogicalAndExpression(
g.ReferenceNotEqualsExpression(
g.IdentifierName("proxy"),
g.NullLiteralExpression()
),
g.ValueNotEqualsExpression(
g.MemberAccessExpression(
g.IdentifierName("proxy"),
"State"
),
g.DottedName("System.ServiceModel.CommunicationState.Closed")
)
),
new SyntaxNode[]
{
// if (!alwaysAbort && proxy.State != System.ServiceModel.CommunicationState.Faulted)
g.IfStatement(
g.LogicalAndExpression(
g.LogicalNotExpression(
g.IdentifierName("alwaysAbort")
),
g.ValueNotEqualsExpression(
g.MemberAccessExpression(
g.IdentifierName("proxy"),
"State"
),
g.DottedName("System.ServiceModel.CommunicationState.Faulted")
)
),
new SyntaxNode[]
{
g.ExpressionStatement(
asAsync ?
// await System.Threading.Tasks.Task.Factory.FromAsync(proxy.BeginClose, proxy.EndClose, null).ConfigureAwait(false);
AwaitExpression(g,
g.InvocationExpression(
g.DottedName("System.Threading.Tasks.Task.Factory.FromAsync"),
g.DottedName("proxy.BeginClose"),
g.DottedName("proxy.EndClose"),
g.NullLiteralExpression()
)
)
:
// proxy.Close();
g.InvocationExpression(
g.MemberAccessExpression(
g.IdentifierName("proxy"),
"Close"
)
)
)
},
new SyntaxNode[]
{
// proxy.Abort();
g.ExpressionStatement(
g.InvocationExpression(
g.MemberAccessExpression(
g.IdentifierName("proxy"),
"Abort"
)
)
)
}
)
}
),
},
new SyntaxNode[]
{
// catch (System.ServiceModel.CommunicationException)
g.CatchClause(compilation.RequireTypeByMetadataName("System.ServiceModel.CommunicationException"),
new SyntaxNode[]
{
// proxy.Abort();
g.ExpressionStatement(
g.InvocationExpression(
g.MemberAccessExpression(
g.IdentifierName("proxy"),
"Abort"
)
)
)
}
),
g.CatchClause(compilation.RequireTypeByMetadataName("System.TimeoutException"),
new SyntaxNode[]
{
// proxy.Abort();
g.ExpressionStatement(
g.InvocationExpression(
g.MemberAccessExpression(
g.IdentifierName("proxy"),
"Abort"
)
)
)
}
),
g.CatchClause(
new SyntaxNode[]
{
// proxy.Abort();
g.ExpressionStatement(
g.InvocationExpression(
g.MemberAccessExpression(
g.IdentifierName("proxy"),
"Abort"
)
)
),
g.ThrowStatement()
}
)
}
)
}
));
}
public Task <ClassDeclarationSyntax> GenerateClientClass(SemanticModel semanticModel, SyntaxGenerator gen, INamedTypeSymbol proxyInterface, string name, Accessibility accessibility, bool includeCancellableAsyncMethods, bool suppressWarningComments, MemberAccessibility constructorAccessibility, bool withInternalProxy)
{
if (name == null)
{
if (proxyInterface.Name.StartsWith("I"))
{
name = proxyInterface.Name.Substring(1);
}
if (name.EndsWith("Proxy"))
{
name = name.Substring(0, name.Length - "Proxy".Length);
}
if (!name.EndsWith("Client"))
{
name = name + "Client";
}
}
SyntaxNode targetClass = gen.ClassDeclaration(name,
baseType: gen.TypeExpression(semanticModel.Compilation.RequireType <MarshalByRefObject>()),
accessibility: accessibility,
modifiers: DeclarationModifiers.Sealed);
targetClass = gen.AddWarningCommentIf(!suppressWarningComments, targetClass);
targetClass = gen.AddInterfaceType(targetClass, gen.TypeExpression(semanticModel.Compilation.GetSpecialType(SpecialType.System_IDisposable)));
targetClass = gen.AddInterfaceType(targetClass, gen.TypeExpression(proxyInterface));
IEnumerable <IMethodSymbol> methods = GetOperationContractMethods(semanticModel.Compilation, proxyInterface).ToArray();
GenerationNameTable nameTable = new GenerationNameTable(methods.Select(m => m.Name).Concat(new[] { name }));
#region Private Fields
// ==> private IProxy m_cachedProxy;
SyntaxNode cachedProxyField =
gen.FieldDeclaration(nameTable[MemberNames.CachedProxyField], gen.TypeExpression(proxyInterface), Accessibility.Private, DeclarationModifiers.None)
.PrependLeadingTrivia(gen.CreateRegionTrivia("Private Fields"));
targetClass = gen.AddMembers(targetClass, cachedProxyField);
// ==> private readonly Func<IProxy> m_proxyFactory;
SyntaxNode proxyFactoryTypeExpression = gen.TypeExpression(semanticModel.Compilation.RequireTypeByMetadataName("System.Func`1").Construct(proxyInterface));
targetClass = gen.AddMembers(targetClass, gen.FieldDeclaration(nameTable[MemberNames.ProxyFactoryField], proxyFactoryTypeExpression, Accessibility.Private, DeclarationModifiers.ReadOnly)
.AddTrailingTrivia(gen.CreateEndRegionTrivia()).AddNewLineTrivia());
#endregion
#region Constructors
// Constructor
SyntaxNode constructor = gen.ConstructorDeclaration(
parameters: new[] { gen.ParameterDeclaration("proxyFactory", proxyFactoryTypeExpression) },
accessibility: withInternalProxy?Accessibility.Private: ToAccessibility(constructorAccessibility)
);
constructor = gen.AddWarningCommentIf(!suppressWarningComments, constructor);
constructor = constructor.PrependLeadingTrivia(gen.CreateRegionTrivia("Constructors"));
constructor = gen.WithStatements(constructor,
new[]
{
// ==> if (proxyFactory == null)
// ==> throw new System.ArgumentNullException("proxyFactory");
gen.ThrowIfNullStatement("proxyFactory"),
// ==> m_proxyFactory = proxyFactory
gen.AssignmentStatement(
gen.MemberAccessExpression(
gen.ThisExpression(),
gen.IdentifierName(nameTable[MemberNames.ProxyFactoryField])),
gen.IdentifierName("proxyFactory")
)
}
).AddNewLineTrivia();
if (!withInternalProxy)
{
constructor = constructor.AddTrailingTrivia(gen.CreateEndRegionTrivia()).AddNewLineTrivia();
}
targetClass = gen.AddMembers(targetClass, constructor);
ClassDeclarationSyntax proxyClass = null;
if (withInternalProxy)
{
IEnumerable <IMethodSymbol> ctors;
proxyClass = GenerateProxyClass(semanticModel, gen, proxyInterface, nameTable[MemberNames.ProxyClass], Accessibility.Private, suppressWarningComments, MemberAccessibility.Public, out ctors)
.PrependLeadingTrivia(gen.CreateRegionTrivia("Proxy Class").Insert(0, gen.NewLine()))
.AddTrailingTrivia(gen.CreateEndRegionTrivia());
// Generate one constructor for each of the proxy's constructors.
foreach (var ctorEntry in ctors.AsSmartEnumerable())
{
var ctor = ctorEntry.Value;
var targetCtor = gen.ConstructorDeclaration(ctor);
var lambda = gen.ValueReturningLambdaExpression(
gen.ObjectCreationExpression(gen.IdentifierName(gen.GetName(proxyClass)), ctor.Parameters.Select(p => gen.IdentifierName(p.Name)))
);
targetCtor = gen.WithThisConstructorInitializer(targetCtor, new[] { lambda });
targetCtor = gen.AddWarningCommentIf(!suppressWarningComments, targetCtor);
targetCtor = gen.WithAccessibility(targetCtor, ToAccessibility(constructorAccessibility));
if (ctorEntry.IsLast)
{
targetCtor = targetCtor.AddTrailingTrivia(gen.CreateEndRegionTrivia()).AddNewLineTrivia();
}
targetClass = gen.AddMembers(targetClass, targetCtor.AddNewLineTrivia());
}
}
#endregion
#region Operation Contract Methods
// ==> catch
// ==> {
// ==> this.CloseProxy(false);
// ==> throw;
// ==> }
var catchAndCloseProxyStatement = gen.CatchClause(new SyntaxNode[]
{
// ==> this.CloseProxy(false);
gen.ExpressionStatement(
gen.InvocationExpression(
gen.MemberAccessExpression(
gen.ThisExpression(),
nameTable[MemberNames.CloseProxyMethod]
),
gen.FalseLiteralExpression()
)
),
// throw;
gen.ThrowStatement()
});
foreach (var sourceMethodEntry in methods.AsSmartEnumerable())
{
var sourceMethod = sourceMethodEntry.Value;
using (nameTable.PushScope(sourceMethod.Parameters.Select(p => p.Name)))
{
bool isAsync = ReturnsTask(semanticModel.Compilation, sourceMethod);
bool isVoid = sourceMethod.ReturnType.SpecialType == SpecialType.System_Void || sourceMethod.ReturnType.Equals(semanticModel.Compilation.RequireType <Task>());
SyntaxNode targetMethod = gen.MethodDeclaration(sourceMethod);
if (sourceMethodEntry.IsFirst)
{
targetMethod = targetMethod.PrependLeadingTrivia(gen.CreateRegionTrivia("Contract Methods")).AddLeadingTrivia(gen.NewLine());
}
targetMethod = gen.AddWarningCommentIf(!suppressWarningComments, targetMethod);
targetMethod = gen.WithModifiers(targetMethod, isAsync ? DeclarationModifiers.Async : DeclarationModifiers.None);
targetMethod = gen.WithStatements(targetMethod, new SyntaxNode[]
{
// ==> try {
gen.TryCatchStatement(new SyntaxNode[]
{
CreateProxyVaraibleDeclaration(gen, nameTable, isAsync),
CreateProxyInvocationStatement(semanticModel.Compilation, gen, nameTable, sourceMethod)
}, new SyntaxNode[]
{
catchAndCloseProxyStatement
}
)
});
targetMethod = targetMethod.AddNewLineTrivia();
if (sourceMethodEntry.IsLast && !(isAsync && includeCancellableAsyncMethods))
{
targetMethod = targetMethod.AddTrailingTrivia(gen.CreateEndRegionTrivia()).AddNewLineTrivia();
}
targetClass = gen.AddMembers(targetClass, targetMethod);
if (isAsync && includeCancellableAsyncMethods)
{
targetMethod = gen.MethodDeclaration(sourceMethod);
targetMethod = gen.AddParameters(targetMethod, new[] { gen.ParameterDeclaration(nameTable[MemberNames.CancellationTokenParameter], gen.TypeExpression(semanticModel.Compilation.RequireType <CancellationToken>())) });
targetMethod = gen.WithModifiers(targetMethod, isAsync ? DeclarationModifiers.Async : DeclarationModifiers.None);
targetMethod = gen.WithStatements(targetMethod, new SyntaxNode[]
{
// ==> try {
gen.TryCatchStatement(new SyntaxNode[]
{
CreateProxyVaraibleDeclaration(gen, nameTable, isAsync),
CreateCancellableProxyInvocationStatement(semanticModel.Compilation, gen, nameTable, sourceMethod)
}, new SyntaxNode[]
{
catchAndCloseProxyStatement
}
)
});
targetMethod = gen.AddWarningCommentIf(!suppressWarningComments, targetMethod.AddNewLineTrivia());
if (sourceMethodEntry.IsLast)
{
targetMethod = targetMethod.AddTrailingTrivia(gen.CreateEndRegionTrivia()).AddNewLineTrivia();
}
targetClass = gen.AddMembers(targetClass, targetMethod);
}
}
}
#endregion
#region Internal Methods
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateGetProxyMethod(semanticModel.Compilation, gen, proxyInterface, nameTable, false).AddLeadingTrivia(gen.CreateRegionTrivia("Private Methods")).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateGetProxyMethod(semanticModel.Compilation, gen, proxyInterface, nameTable, true).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateStaticCloseProxyMethod(semanticModel.Compilation, gen, nameTable, false).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateStaticCloseProxyMethod(semanticModel.Compilation, gen, nameTable, true).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateCloseProxyMethod(semanticModel.Compilation, gen, nameTable, false).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateCloseProxyMethod(semanticModel.Compilation, gen, nameTable, true).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateEnsureProxyMethod(semanticModel.Compilation, gen, nameTable, false).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateEnsureProxyMethod(semanticModel.Compilation, gen, nameTable, true).AddTrailingTrivia(gen.CreateEndRegionTrivia()).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, CreateDisposeMethods(semanticModel.Compilation, gen, nameTable, suppressWarningComments));
if (withInternalProxy)
{
targetClass = gen.AddMembers(targetClass, proxyClass);
}
#endregion
targetClass = AddGeneratedCodeAttribute(gen, targetClass);
return(Task.FromResult((ClassDeclarationSyntax)targetClass));
}
private SyntaxNode CreateGetProxyMethod(Compilation compilation, SyntaxGenerator g, INamedTypeSymbol proxyInterface, GenerationNameTable nameTable, bool isAsync)
{
//private IProxy GetProxy()
//{
// EnsureProxy();
// return m_cachedProxy;
//}
return(g.MethodDeclaration(
isAsync ? nameTable[MemberNames.GetProxyAsyncMethod] : nameTable[MemberNames.GetProxyMethod],
returnType: g.TypeExpression(isAsync ? compilation.RequireType(typeof(Task <>)).Construct(proxyInterface) : proxyInterface),
accessibility: Accessibility.Private,
modifiers: isAsync ? DeclarationModifiers.Async : DeclarationModifiers.None,
statements: new SyntaxNode[]
{
g.ExpressionStatement(
AwaitExpressionIfAsync(g, isAsync,
g.InvocationExpression(
g.MemberAccessExpression(
g.ThisExpression(),
isAsync ? nameTable[MemberNames.EnsureProxyAsyncMethod] : nameTable[MemberNames.EnsureProxyMethod]
)
)
)
),
g.ReturnStatement(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
)
)
}
));
}
private SyntaxNode CreateCancellableProxyInvocationStatement(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, IMethodSymbol sourceMethod)
{
//using (cancellationToken.Register(s => CloseProxy((System.ServiceModel.ICommunicationObject)s, true), proxy, false))
string stateVariableName = GetUniqueParameterName("s", sourceMethod);
return(g.UsingStatement(
g.InvocationExpression(
g.MemberAccessExpression(
g.IdentifierName(nameTable[MemberNames.CancellationTokenParameter]),
"Register"
),
g.ValueReturningLambdaExpression(
stateVariableName,
g.InvocationExpression(
g.IdentifierName(nameTable[MemberNames.CloseProxyMethod]),
g.CastExpression(
compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"),
g.IdentifierName(stateVariableName)
),
g.TrueLiteralExpression()
)
),
g.IdentifierName(nameTable[MemberNames.ProxyVariable]),
g.FalseLiteralExpression()
),
new SyntaxNode[]
{
CreateProxyInvocationStatement(compilation, g, nameTable, sourceMethod)
}
));
}
private IEnumerable <SyntaxNode> CreateDisposeMethods(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, bool suppressWarningComments)
{
yield return(g.AddWarningCommentIf(!suppressWarningComments,
g.MethodDeclaration(
"Dispose",
accessibility: Accessibility.Public,
statements: new SyntaxNode[]
{
g.InvocationExpression(
g.MemberAccessExpression(
g.ThisExpression(),
"Dispose"
),
g.TrueLiteralExpression()
),
g.InvocationExpression(
g.MemberAccessExpression(
g.TypeExpression(compilation.RequireTypeByMetadataName("System.GC")),
"SuppressFinalize"
),
g.ThisExpression()
)
}
))
.PrependLeadingTrivia(g.CreateRegionTrivia("IDisposable")));
yield return(g.AddWarningCommentIf(!suppressWarningComments, g.MethodDeclaration(
"Dispose",
parameters: new SyntaxNode[] { g.ParameterDeclaration("disposing", g.TypeExpression(SpecialType.System_Boolean)) },
accessibility: Accessibility.Private,
statements: new SyntaxNode[]
{
g.IfStatement(
g.ValueEqualsExpression(
g.IdentifierName("disposing"),
g.TrueLiteralExpression()
),
new SyntaxNode[]
{
g.TryCatchStatement(
new SyntaxNode[]
{
g.ExpressionStatement(
g.InvocationExpression(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CloseProxyMethod]
),
g.FalseLiteralExpression()
)
)
},
new SyntaxNode[]
{
g.CatchClause(new SyntaxNode [0])
}
)
}
)
}
)).AddTrailingTrivia(g.CreateEndRegionTrivia()));
}
private SyntaxNode CreateProxyVaraibleDeclaration(SyntaxGenerator g, GenerationNameTable nameTable, bool isAsync)
{
// var proxy = this.GetProxy();
if (!isAsync)
{
return g.LocalDeclarationStatement(nameTable[MemberNames.ProxyVariable],
g.InvocationExpression(
g.MemberAccessExpression(
g.ThisExpression(),
g.IdentifierName(nameTable[MemberNames.GetProxyMethod])
)
)
);
}
else
{
// var proxy = await this.GetProxyAsync().ConfigureAwait(false);
return
g.LocalDeclarationStatement(nameTable[MemberNames.ProxyVariable],
g.AwaitExpression(
g.InvocationExpression(
g.MemberAccessExpression(
g.InvocationExpression(
g.MemberAccessExpression(
g.ThisExpression(),
g.IdentifierName(nameTable[MemberNames.GetProxyAsyncMethod])
)
), "ConfigureAwait"),
g.FalseLiteralExpression()
)
)
);
}
}
private SyntaxNode CreateEnsureProxyMethod(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, bool asAsync)
{
/*
private async System.Threading.Tasks.Task EnsureProxyAsync()
{
if (m_cachedProxy != null && (
((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Faulted ||
((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Closed))
{
await CloseProxyAsync().ConfigureAwait(false);
}
if (m_cachedProxy == null)
{
var proxy = m_proxyFactory();
await System.Threading.Tasks.Task.Factory.FromAsync(((System.ServiceModel.ICommunicationObject)proxy).BeginOpen, ((System.ServiceModel.ICommunicationObject)proxy).EndOpen, null).ConfigureAwait(false);
m_cachedProxy = proxy;
}
}
*/
return
g.MethodDeclaration(
asAsync ? nameTable[MemberNames.EnsureProxyAsyncMethod] : nameTable[MemberNames.EnsureProxyMethod],
returnType: asAsync ? g.TypeExpression(compilation.RequireType<Task>()) : null,
accessibility: Accessibility.Private,
modifiers: asAsync ? DeclarationModifiers.Async : DeclarationModifiers.None,
statements: new SyntaxNode[]
{
//if (m_cachedProxy != null && (
// ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Faulted ||
// ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Closed))
g.IfStatement(
g.LogicalAndExpression(
// m_cachedProxy != null
g.ReferenceNotEqualsExpression(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
),
g.NullLiteralExpression()
),
g.LogicalOrExpression(
// ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Faulted
g.ValueEqualsExpression(
g.MemberAccessExpression(
g.CastExpression(
compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"),
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
)
),
"State"
),
g.DottedName("System.ServiceModel.CommunicationState.Faulted")
),
// ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Faulted
g.ValueEqualsExpression(
g.MemberAccessExpression(
g.CastExpression(
compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"),
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
)
),
"State"
),
g.DottedName("System.ServiceModel.CommunicationState.Closed")
)
)
),
new SyntaxNode[]
{
// await CloseProxyAsync(false).ConfigureAwait(false);
// or
// CloseProxy(false);
AwaitExpressionIfAsync(g, asAsync,
g.InvocationExpression(
g.MemberAccessExpression(
g.ThisExpression(),
asAsync ? nameTable[MemberNames.CloseProxyAsyncMethod] : nameTable[MemberNames.CloseProxyMethod]
),
g.FalseLiteralExpression()
)
)
}
),
g.IfStatement(
g.ReferenceEqualsExpression(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
),
g.NullLiteralExpression()
),
new SyntaxNode[]
{
g.LocalDeclarationStatement(
"proxy",
g.InvocationExpression(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.ProxyFactoryField]
)
)
),
g.ExpressionStatement(
asAsync ?
AwaitExpression(g,
g.InvocationExpression(
g.DottedName("System.Threading.Tasks.Task.Factory.FromAsync"),
g.MemberAccessExpression(
g.CastExpression(
compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"),
g.IdentifierName("proxy")
),
"BeginOpen"
),
g.MemberAccessExpression(
g.CastExpression(
compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"),
g.IdentifierName("proxy")
),
"EndOpen"
),
g.NullLiteralExpression()
)
)
:
g.InvocationExpression(
g.MemberAccessExpression(
g.CastExpression(
compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"),
g.IdentifierName("proxy")
),
"Open"
)
)
),
g.AssignmentStatement(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
),
g.IdentifierName("proxy")
)
}
)
}
);
}
private IEnumerable<SyntaxNode> CreateDisposeMethods(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, bool suppressWarningComments)
{
yield return g.AddWarningCommentIf(!suppressWarningComments,
g.MethodDeclaration(
"Dispose",
accessibility: Accessibility.Public,
statements: new SyntaxNode[]
{
g.InvocationExpression(
g.MemberAccessExpression(
g.ThisExpression(),
"Dispose"
),
g.TrueLiteralExpression()
),
g.InvocationExpression(
g.MemberAccessExpression(
g.TypeExpression(compilation.RequireTypeByMetadataName("System.GC")),
"SuppressFinalize"
),
g.ThisExpression()
)
}
))
.PrependLeadingTrivia(g.CreateRegionTrivia("IDisposable"));
yield return g.AddWarningCommentIf(!suppressWarningComments, g.MethodDeclaration(
"Dispose",
parameters: new SyntaxNode[] { g.ParameterDeclaration("disposing", g.TypeExpression(SpecialType.System_Boolean)) },
accessibility: Accessibility.Private,
statements: new SyntaxNode[]
{
g.IfStatement(
g.ValueEqualsExpression(
g.IdentifierName("disposing"),
g.TrueLiteralExpression()
),
new SyntaxNode[]
{
g.TryCatchStatement(
new SyntaxNode[]
{
g.ExpressionStatement(
g.InvocationExpression(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CloseProxyMethod]
),
g.FalseLiteralExpression()
)
)
},
new SyntaxNode[]
{
g.CatchClause(new SyntaxNode [0])
}
)
}
)
}
)).AddTrailingTrivia(g.CreateEndRegionTrivia());
}
private SyntaxNode CreateStaticCloseProxyMethod(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, bool asAsync)
{
//private static void CloseProxy(System.ServiceModel.ICommunicationObject proxy, bool alwaysAbort)
//{
// try
// {
// if (proxy != null && proxy.State != System.ServiceModel.CommunicationState.Closed)
// {
// if (!alwaysAbort && proxy.State != System.ServiceModel.CommunicationState.Faulted)
// {
// proxy.Close();
// }
// else
// {
// proxy.Abort();
// }
// }
// }
// catch (System.ServiceModel.CommunicationException)
// {
// proxy.Abort();
// }
// catch (System.TimeoutException)
// {
// proxy.Abort();
// }
// catch
// {
// proxy.Abort();
// throw;
// }
//}
return g.MethodDeclaration(
asAsync ? nameTable[MemberNames.CloseProxyAsyncMethod] : nameTable[MemberNames.CloseProxyMethod],
accessibility: Accessibility.Private,
returnType: asAsync ? g.TypeExpression(compilation.RequireType<Task>()) : null,
modifiers: (asAsync ? DeclarationModifiers.Async : DeclarationModifiers.None) | DeclarationModifiers.Static,
parameters: new SyntaxNode[]
{
g.ParameterDeclaration("proxy", g.TypeExpression(compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"))),
g.ParameterDeclaration("alwaysAbort", g.TypeExpression(SpecialType.System_Boolean))
},
statements: new SyntaxNode[]
{
g.TryCatchStatement(
new SyntaxNode[]
{
// if (proxy != null && proxy.State != System.ServiceModel.CommunicationState.Closed)
g.IfStatement(
g.LogicalAndExpression(
g.ReferenceNotEqualsExpression(
g.IdentifierName("proxy"),
g.NullLiteralExpression()
),
g.ValueNotEqualsExpression(
g.MemberAccessExpression(
g.IdentifierName("proxy"),
"State"
),
g.DottedName("System.ServiceModel.CommunicationState.Closed")
)
),
new SyntaxNode[]
{
// if (!alwaysAbort && proxy.State != System.ServiceModel.CommunicationState.Faulted)
g.IfStatement(
g.LogicalAndExpression(
g.LogicalNotExpression(
g.IdentifierName("alwaysAbort")
),
g.ValueNotEqualsExpression(
g.MemberAccessExpression(
g.IdentifierName("proxy"),
"State"
),
g.DottedName("System.ServiceModel.CommunicationState.Faulted")
)
),
new SyntaxNode[]
{
g.ExpressionStatement(
asAsync ?
// await System.Threading.Tasks.Task.Factory.FromAsync(proxy.BeginClose, proxy.EndClose, null).ConfigureAwait(false);
AwaitExpression(g,
g.InvocationExpression(
g.DottedName("System.Threading.Tasks.Task.Factory.FromAsync"),
g.DottedName("proxy.BeginClose"),
g.DottedName("proxy.EndClose"),
g.NullLiteralExpression()
)
)
:
// proxy.Close();
g.InvocationExpression(
g.MemberAccessExpression(
g.IdentifierName("proxy"),
"Close"
)
)
)
},
new SyntaxNode[]
{
// proxy.Abort();
g.ExpressionStatement(
g.InvocationExpression(
g.MemberAccessExpression(
g.IdentifierName("proxy"),
"Abort"
)
)
)
}
)
}
),
},
new SyntaxNode[]
{
// catch (System.ServiceModel.CommunicationException)
g.CatchClause(compilation.RequireTypeByMetadataName("System.ServiceModel.CommunicationException"),
new SyntaxNode[]
{
// proxy.Abort();
g.ExpressionStatement(
g.InvocationExpression(
g.MemberAccessExpression(
g.IdentifierName("proxy"),
"Abort"
)
)
)
}
),
g.CatchClause(compilation.RequireTypeByMetadataName("System.TimeoutException"),
new SyntaxNode[]
{
// proxy.Abort();
g.ExpressionStatement(
g.InvocationExpression(
g.MemberAccessExpression(
g.IdentifierName("proxy"),
"Abort"
)
)
)
}
),
g.CatchClause(
new SyntaxNode[]
{
// proxy.Abort();
g.ExpressionStatement(
g.InvocationExpression(
g.MemberAccessExpression(
g.IdentifierName("proxy"),
"Abort"
)
)
),
g.ThrowStatement()
}
)
}
)
}
);
}
private SyntaxNode CreateCloseProxyMethod(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, bool asAsync)
{
return
g.MethodDeclaration(
asAsync ? nameTable[MemberNames.CloseProxyAsyncMethod] : nameTable[MemberNames.CloseProxyMethod],
returnType: asAsync ? g.TypeExpression(compilation.RequireType<Task>()) : null,
parameters: new SyntaxNode[] { g.ParameterDeclaration("alwaysAbort", g.TypeExpression(SpecialType.System_Boolean)) },
modifiers: asAsync ? DeclarationModifiers.Async : DeclarationModifiers.None,
accessibility: Accessibility.Private,
statements: new SyntaxNode[]
{
g.IfStatement(
g.ReferenceNotEqualsExpression(
g.IdentifierName(nameTable[MemberNames.CachedProxyField]),
g.NullLiteralExpression()
),
new SyntaxNode[]
{
g.LocalDeclarationStatement(
"proxy",
g.TryCastExpression(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
),
compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject")
)
),
g.TryFinallyStatement(
new SyntaxNode[]
{
AwaitExpressionIfAsync(g, asAsync,
g.InvocationExpression(
g.IdentifierName(asAsync ? nameTable[MemberNames.CloseProxyAsyncMethod] : nameTable[MemberNames.CloseProxyMethod]),
g.IdentifierName("proxy"),
g.IdentifierName("alwaysAbort")
)
)
},
new SyntaxNode[]
{
g.AssignmentStatement(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
),
g.NullLiteralExpression()
)
}
)
}
)
}
);
}
public Task<ClassDeclarationSyntax> GenerateClientClass(SemanticModel semanticModel, SyntaxGenerator gen, INamedTypeSymbol proxyInterface, string name, Accessibility accessibility, bool includeCancellableAsyncMethods, bool suppressWarningComments, MemberAccessibility constructorAccessibility, bool withInternalProxy)
{
if (name == null)
{
if (proxyInterface.Name.StartsWith("I"))
name = proxyInterface.Name.Substring(1);
if (name.EndsWith("Proxy"))
name = name.Substring(0, name.Length - "Proxy".Length);
if (!name.EndsWith("Client"))
name = name + "Client";
}
SyntaxNode targetClass = gen.ClassDeclaration(name,
baseType: gen.TypeExpression(semanticModel.Compilation.RequireType<MarshalByRefObject>()),
accessibility: accessibility,
modifiers: DeclarationModifiers.Sealed);
targetClass = gen.AddWarningCommentIf(!suppressWarningComments, targetClass);
targetClass = gen.AddInterfaceType(targetClass, gen.TypeExpression(semanticModel.Compilation.GetSpecialType(SpecialType.System_IDisposable)));
targetClass = gen.AddInterfaceType(targetClass, gen.TypeExpression(proxyInterface));
IEnumerable<IMethodSymbol> methods = GetOperationContractMethods(semanticModel.Compilation, proxyInterface).ToArray();
GenerationNameTable nameTable = new GenerationNameTable(methods.Select(m => m.Name).Concat(new[] { name }));
#region Private Fields
// ==> private IProxy m_cachedProxy;
SyntaxNode cachedProxyField =
gen.FieldDeclaration(nameTable[MemberNames.CachedProxyField], gen.TypeExpression(proxyInterface), Accessibility.Private, DeclarationModifiers.None)
.PrependLeadingTrivia(gen.CreateRegionTrivia("Private Fields"));
targetClass = gen.AddMembers(targetClass, cachedProxyField);
// ==> private readonly Func<IProxy> m_proxyFactory;
SyntaxNode proxyFactoryTypeExpression = gen.TypeExpression(semanticModel.Compilation.RequireTypeByMetadataName("System.Func`1").Construct(proxyInterface));
targetClass = gen.AddMembers(targetClass, gen.FieldDeclaration(nameTable[MemberNames.ProxyFactoryField], proxyFactoryTypeExpression, Accessibility.Private, DeclarationModifiers.ReadOnly)
.AddTrailingTrivia(gen.CreateEndRegionTrivia()).AddNewLineTrivia());
#endregion
#region Constructors
// Constructor
SyntaxNode constructor = gen.ConstructorDeclaration(
parameters: new[] { gen.ParameterDeclaration("proxyFactory", proxyFactoryTypeExpression) },
accessibility: withInternalProxy ? Accessibility.Private : ToAccessibility(constructorAccessibility)
);
constructor = gen.AddWarningCommentIf(!suppressWarningComments, constructor);
constructor = constructor.PrependLeadingTrivia(gen.CreateRegionTrivia("Constructors"));
constructor = gen.WithStatements(constructor,
new[]
{
// ==> if (proxyFactory == null)
// ==> throw new System.ArgumentNullException("proxyFactory");
gen.ThrowIfNullStatement("proxyFactory"),
// ==> m_proxyFactory = proxyFactory
gen.AssignmentStatement(
gen.MemberAccessExpression(
gen.ThisExpression(),
gen.IdentifierName(nameTable[MemberNames.ProxyFactoryField])),
gen.IdentifierName("proxyFactory")
)
}
).AddNewLineTrivia();
if (!withInternalProxy)
constructor = constructor.AddTrailingTrivia(gen.CreateEndRegionTrivia()).AddNewLineTrivia();
targetClass = gen.AddMembers(targetClass, constructor);
ClassDeclarationSyntax proxyClass = null;
if (withInternalProxy)
{
IEnumerable<IMethodSymbol> ctors;
proxyClass = GenerateProxyClass(semanticModel, gen, proxyInterface, nameTable[MemberNames.ProxyClass], Accessibility.Private, suppressWarningComments, MemberAccessibility.Public, out ctors)
.PrependLeadingTrivia(gen.CreateRegionTrivia("Proxy Class").Insert(0, gen.NewLine()))
.AddTrailingTrivia(gen.CreateEndRegionTrivia());
// Generate one constructor for each of the proxy's constructors.
foreach (var ctorEntry in ctors.AsSmartEnumerable())
{
var ctor = ctorEntry.Value;
var targetCtor = gen.ConstructorDeclaration(ctor);
var lambda = gen.ValueReturningLambdaExpression(
gen.ObjectCreationExpression(gen.IdentifierName(gen.GetName(proxyClass)), ctor.Parameters.Select(p => gen.IdentifierName(p.Name)))
);
targetCtor = gen.WithThisConstructorInitializer(targetCtor, new[] { lambda });
targetCtor = gen.AddWarningCommentIf(!suppressWarningComments, targetCtor);
targetCtor = gen.WithAccessibility(targetCtor, ToAccessibility(constructorAccessibility));
if (ctorEntry.IsLast)
{
targetCtor = targetCtor.AddTrailingTrivia(gen.CreateEndRegionTrivia()).AddNewLineTrivia();
}
targetClass = gen.AddMembers(targetClass, targetCtor.AddNewLineTrivia());
}
}
#endregion
#region Operation Contract Methods
// ==> catch
// ==> {
// ==> this.CloseProxy(false);
// ==> throw;
// ==> }
var catchAndCloseProxyStatement = gen.CatchClause(new SyntaxNode[]
{
// ==> this.CloseProxy(false);
gen.ExpressionStatement(
gen.InvocationExpression(
gen.MemberAccessExpression(
gen.ThisExpression(),
nameTable[MemberNames.CloseProxyMethod]
),
gen.FalseLiteralExpression()
)
),
// throw;
gen.ThrowStatement()
});
foreach (var sourceMethodEntry in methods.AsSmartEnumerable())
{
var sourceMethod = sourceMethodEntry.Value;
using (nameTable.PushScope(sourceMethod.Parameters.Select(p => p.Name)))
{
bool isAsync = ReturnsTask(semanticModel.Compilation, sourceMethod);
bool isVoid = sourceMethod.ReturnType.SpecialType == SpecialType.System_Void || sourceMethod.ReturnType.Equals(semanticModel.Compilation.RequireType<Task>());
SyntaxNode targetMethod = gen.MethodDeclaration(sourceMethod);
if (sourceMethodEntry.IsFirst)
targetMethod = targetMethod.PrependLeadingTrivia(gen.CreateRegionTrivia("Contract Methods")).AddLeadingTrivia(gen.NewLine());
targetMethod = gen.AddWarningCommentIf(!suppressWarningComments, targetMethod);
targetMethod = gen.WithModifiers(targetMethod, isAsync ? DeclarationModifiers.Async : DeclarationModifiers.None);
targetMethod = gen.WithStatements(targetMethod, new SyntaxNode[]
{
// ==> try {
gen.TryCatchStatement(new SyntaxNode[]
{
CreateProxyVaraibleDeclaration(gen, nameTable, isAsync),
CreateProxyInvocationStatement(semanticModel.Compilation, gen, nameTable, sourceMethod)
}, new SyntaxNode[]
{
catchAndCloseProxyStatement
}
)
});
targetMethod = targetMethod.AddNewLineTrivia();
if (sourceMethodEntry.IsLast && !(isAsync && includeCancellableAsyncMethods))
targetMethod = targetMethod.AddTrailingTrivia(gen.CreateEndRegionTrivia()).AddNewLineTrivia();
targetClass = gen.AddMembers(targetClass, targetMethod);
if (isAsync && includeCancellableAsyncMethods)
{
targetMethod = gen.MethodDeclaration(sourceMethod);
targetMethod = gen.AddParameters(targetMethod, new[] { gen.ParameterDeclaration(nameTable[MemberNames.CancellationTokenParameter], gen.TypeExpression(semanticModel.Compilation.RequireType<CancellationToken>())) });
targetMethod = gen.WithModifiers(targetMethod, isAsync ? DeclarationModifiers.Async : DeclarationModifiers.None);
targetMethod = gen.WithStatements(targetMethod, new SyntaxNode[]
{
// ==> try {
gen.TryCatchStatement(new SyntaxNode[]
{
CreateProxyVaraibleDeclaration(gen, nameTable, isAsync),
CreateCancellableProxyInvocationStatement(semanticModel.Compilation, gen, nameTable, sourceMethod)
}, new SyntaxNode[]
{
catchAndCloseProxyStatement
}
)
});
targetMethod = gen.AddWarningCommentIf(!suppressWarningComments, targetMethod.AddNewLineTrivia());
if (sourceMethodEntry.IsLast)
targetMethod = targetMethod.AddTrailingTrivia(gen.CreateEndRegionTrivia()).AddNewLineTrivia();
targetClass = gen.AddMembers(targetClass, targetMethod);
}
}
}
#endregion
#region Internal Methods
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateGetProxyMethod(semanticModel.Compilation, gen, proxyInterface, nameTable, false).AddLeadingTrivia(gen.CreateRegionTrivia("Private Methods")).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateGetProxyMethod(semanticModel.Compilation, gen, proxyInterface, nameTable, true).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateStaticCloseProxyMethod(semanticModel.Compilation, gen, nameTable, false).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateStaticCloseProxyMethod(semanticModel.Compilation, gen, nameTable, true).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateCloseProxyMethod(semanticModel.Compilation, gen, nameTable, false).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateCloseProxyMethod(semanticModel.Compilation, gen, nameTable, true).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateEnsureProxyMethod(semanticModel.Compilation, gen, nameTable, false).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, gen.AddWarningCommentIf(!suppressWarningComments, CreateEnsureProxyMethod(semanticModel.Compilation, gen, nameTable, true).AddTrailingTrivia(gen.CreateEndRegionTrivia()).AddNewLineTrivia()));
targetClass = gen.AddMembers(targetClass, CreateDisposeMethods(semanticModel.Compilation, gen, nameTable, suppressWarningComments));
if (withInternalProxy)
{
targetClass = gen.AddMembers(targetClass, proxyClass);
}
#endregion
targetClass = AddGeneratedCodeAttribute(gen, targetClass);
return Task.FromResult((ClassDeclarationSyntax)targetClass);
}
private SyntaxNode CreateGetProxyMethod(Compilation compilation, SyntaxGenerator g, INamedTypeSymbol proxyInterface, GenerationNameTable nameTable, bool isAsync)
{
//private IProxy GetProxy()
//{
// EnsureProxy();
// return m_cachedProxy;
//}
return g.MethodDeclaration(
isAsync ? nameTable[MemberNames.GetProxyAsyncMethod] : nameTable[MemberNames.GetProxyMethod],
returnType: g.TypeExpression(isAsync ? compilation.RequireType(typeof(Task<>)).Construct(proxyInterface) : proxyInterface),
accessibility: Accessibility.Private,
modifiers: isAsync ? DeclarationModifiers.Async : DeclarationModifiers.None,
statements: new SyntaxNode[]
{
g.ExpressionStatement(
AwaitExpressionIfAsync(g, isAsync,
g.InvocationExpression(
g.MemberAccessExpression(
g.ThisExpression(),
isAsync ? nameTable[MemberNames.EnsureProxyAsyncMethod] : nameTable[MemberNames.EnsureProxyMethod]
)
)
)
),
g.ReturnStatement(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
)
)
}
);
}
private SyntaxNode CreateCancellableProxyInvocationStatement(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, IMethodSymbol sourceMethod)
{
//using (cancellationToken.Register(s => CloseProxy((System.ServiceModel.ICommunicationObject)s, true), proxy, false))
string stateVariableName = GetUniqueParameterName("s", sourceMethod);
return g.UsingStatement(
g.InvocationExpression(
g.MemberAccessExpression(
g.IdentifierName(nameTable[MemberNames.CancellationTokenParameter]),
"Register"
),
g.ValueReturningLambdaExpression(
stateVariableName,
g.InvocationExpression(
g.IdentifierName(nameTable[MemberNames.CloseProxyMethod]),
g.CastExpression(
compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"),
g.IdentifierName(stateVariableName)
),
g.TrueLiteralExpression()
)
),
g.IdentifierName(nameTable[MemberNames.ProxyVariable]),
g.FalseLiteralExpression()
),
new SyntaxNode[]
{
CreateProxyInvocationStatement(compilation, g, nameTable, sourceMethod)
}
);
}
private SyntaxNode CreateCloseProxyMethod(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, bool asAsync)
{
return
(g.MethodDeclaration(
asAsync ? nameTable[MemberNames.CloseProxyAsyncMethod] : nameTable[MemberNames.CloseProxyMethod],
returnType: asAsync ? g.TypeExpression(compilation.RequireType <Task>()) : null,
parameters: new SyntaxNode[] { g.ParameterDeclaration("alwaysAbort", g.TypeExpression(SpecialType.System_Boolean)) },
modifiers: asAsync?DeclarationModifiers.Async: DeclarationModifiers.None,
accessibility: Accessibility.Private,
statements: new SyntaxNode[]
{
g.IfStatement(
g.ReferenceNotEqualsExpression(
g.IdentifierName(nameTable[MemberNames.CachedProxyField]),
g.NullLiteralExpression()
),
new SyntaxNode[]
{
g.LocalDeclarationStatement(
"proxy",
g.TryCastExpression(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
),
compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject")
)
),
g.TryFinallyStatement(
new SyntaxNode[]
{
AwaitExpressionIfAsync(g, asAsync,
g.InvocationExpression(
g.IdentifierName(asAsync ? nameTable[MemberNames.CloseProxyAsyncMethod] : nameTable[MemberNames.CloseProxyMethod]),
g.IdentifierName("proxy"),
g.IdentifierName("alwaysAbort")
)
)
},
new SyntaxNode[]
{
g.AssignmentStatement(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
),
g.NullLiteralExpression()
)
}
)
}
)
}
));
}
public ScopeDisposer(GenerationNameTable table)
{
m_table = table;
}
private SyntaxNode CreateEnsureProxyMethod(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, bool asAsync)
{
/*
* private async System.Threading.Tasks.Task EnsureProxyAsync()
* {
* if (m_cachedProxy != null && (
* ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Faulted ||
* ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Closed))
* {
* await CloseProxyAsync().ConfigureAwait(false);
* }
*
* if (m_cachedProxy == null)
* {
* var proxy = m_proxyFactory();
* await System.Threading.Tasks.Task.Factory.FromAsync(((System.ServiceModel.ICommunicationObject)proxy).BeginOpen, ((System.ServiceModel.ICommunicationObject)proxy).EndOpen, null).ConfigureAwait(false);
* m_cachedProxy = proxy;
* }
* }
*/
return
(g.MethodDeclaration(
asAsync ? nameTable[MemberNames.EnsureProxyAsyncMethod] : nameTable[MemberNames.EnsureProxyMethod],
returnType: asAsync ? g.TypeExpression(compilation.RequireType <Task>()) : null,
accessibility: Accessibility.Private,
modifiers: asAsync ? DeclarationModifiers.Async : DeclarationModifiers.None,
statements: new SyntaxNode[]
{
//if (m_cachedProxy != null && (
// ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Faulted ||
// ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Closed))
g.IfStatement(
g.LogicalAndExpression(
// m_cachedProxy != null
g.ReferenceNotEqualsExpression(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
),
g.NullLiteralExpression()
),
g.LogicalOrExpression(
// ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Faulted
g.ValueEqualsExpression(
g.MemberAccessExpression(
g.CastExpression(
compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"),
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
)
),
"State"
),
g.DottedName("System.ServiceModel.CommunicationState.Faulted")
),
// ((System.ServiceModel.ICommunicationObject)m_cachedProxy).State == System.ServiceModel.CommunicationState.Faulted
g.ValueEqualsExpression(
g.MemberAccessExpression(
g.CastExpression(
compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"),
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
)
),
"State"
),
g.DottedName("System.ServiceModel.CommunicationState.Closed")
)
)
),
new SyntaxNode[]
{
// await CloseProxyAsync(false).ConfigureAwait(false);
// or
// CloseProxy(false);
AwaitExpressionIfAsync(g, asAsync,
g.InvocationExpression(
g.MemberAccessExpression(
g.ThisExpression(),
asAsync ? nameTable[MemberNames.CloseProxyAsyncMethod] : nameTable[MemberNames.CloseProxyMethod]
),
g.FalseLiteralExpression()
)
)
}
),
g.IfStatement(
g.ReferenceEqualsExpression(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
),
g.NullLiteralExpression()
),
new SyntaxNode[]
{
g.LocalDeclarationStatement(
"proxy",
g.InvocationExpression(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.ProxyFactoryField]
)
)
),
g.ExpressionStatement(
asAsync ?
AwaitExpression(g,
g.InvocationExpression(
g.DottedName("System.Threading.Tasks.Task.Factory.FromAsync"),
g.MemberAccessExpression(
g.CastExpression(
compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"),
g.IdentifierName("proxy")
),
"BeginOpen"
),
g.MemberAccessExpression(
g.CastExpression(
compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"),
g.IdentifierName("proxy")
),
"EndOpen"
),
g.NullLiteralExpression()
)
)
:
g.InvocationExpression(
g.MemberAccessExpression(
g.CastExpression(
compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"),
g.IdentifierName("proxy")
),
"Open"
)
)
),
g.AssignmentStatement(
g.MemberAccessExpression(
g.ThisExpression(),
nameTable[MemberNames.CachedProxyField]
),
g.IdentifierName("proxy")
)
}
)
}
));
}
private SyntaxNode CreateProxyInvocationStatement(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, IMethodSymbol sourceMethod)
{
bool isAsync = ReturnsTask(compilation, sourceMethod);
bool isVoid = IsVoid(compilation, sourceMethod);
// proxy.Method(arg1, arg2, ...);
SyntaxNode invocation = g.InvocationExpression(
g.MemberAccessExpression(
g.IdentifierName(nameTable[MemberNames.ProxyVariable]),
sourceMethod.Name
),
sourceMethod.Parameters.Select(p => g.IdentifierName(p.Name))
);
if (isAsync)
{
// await proxy.Method(arg1, arg2, ...).ConfigureAwait(false);
invocation =
g.AwaitExpression(
g.InvocationExpression(
g.MemberAccessExpression(
invocation,
"ConfigureAwait"
),
g.FalseLiteralExpression()
)
);
}
if (isVoid)
{
invocation = g.ExpressionStatement(invocation);
}
else
{
invocation = g.ReturnStatement(invocation);
}
return(invocation);
}
public ScopeDisposer(GenerationNameTable table)
{
m_table = table;
}
private SyntaxNode CreateProxyInvocationStatement(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, IMethodSymbol sourceMethod)
{
bool isAsync = ReturnsTask(compilation, sourceMethod);
bool isVoid = IsVoid(compilation, sourceMethod);
// proxy.Method(arg1, arg2, ...);
SyntaxNode invocation = g.InvocationExpression(
g.MemberAccessExpression(
g.IdentifierName(nameTable[MemberNames.ProxyVariable]),
sourceMethod.Name
),
sourceMethod.Parameters.Select(p => g.IdentifierName(p.Name))
);
if (isAsync)
{
// await proxy.Method(arg1, arg2, ...).ConfigureAwait(false);
invocation =
g.AwaitExpression(
g.InvocationExpression(
g.MemberAccessExpression(
invocation,
"ConfigureAwait"
),
g.FalseLiteralExpression()
)
);
}
if (isVoid)
{
invocation = g.ExpressionStatement(invocation);
}
else
{
invocation = g.ReturnStatement(invocation);
}
return invocation;
}
