LSP and DAP communication refactor (#335)

* Restarted lib

* Added message adapter

* Added handler

* Update IJsonRpcMessageAdapter.cs

* Added request handling

* Completed connection flow

* Update JsonRpcConnection.cs

* Update OneOf.sbncs

* Tweaks

* More tweaks

* Update IJsonRpcMethodHandler.cs

* Update IJsonRpcMethodHandler.cs

* No exception but hangs

* Fixes

* Fixed hanging task

* All fixed

* Shutdown

* Updating RPC connection

* Docs

* Update JsonRpcConnection.cs

* Ported to new code

* Debug adapter ported

* Factored out proxy

* Factored out method handler

* Unused usings

* Update JsonRpcConnection.cs

* Update JsonRpcConnection.cs

* Update JsonRpcConnection.cs

* Simplification

src/Draco.Compiler/Internal/Symbols/Metadata/TypeProvider.cs

@@ -1,3 +1,4 @@
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Linq;
@@ -21,7 +22,7 @@ internal sealed class TypeProvider : ISignatureTypeProvider<TypeSymbol, Symbol>,
     private IntrinsicSymbols IntrinsicSymbols => this.compilation.IntrinsicSymbols;
 
     private readonly Compilation compilation;
-    private readonly Dictionary<CacheKey, TypeSymbol> cache = new();
+    private readonly ConcurrentDictionary<CacheKey, TypeSymbol> cache = new();
 
     public TypeProvider(Compilation compilation)
     {
@@ -94,12 +95,7 @@ public TypeSymbol GetGenericTypeParameter(Symbol genericContext, int index)
     public TypeSymbol GetTypeFromDefinition(MetadataReader reader, TypeDefinitionHandle handle, byte rawTypeKind)
     {
         var key = new CacheKey(reader, handle);
-        if (!this.cache.TryGetValue(key, out var type))
-        {
-            type = this.BuildTypeFromDefinition(reader, handle, rawTypeKind);
-            this.cache.Add(key, type);
-        }
-        return type;
+        return this.cache.GetOrAdd(key, _ => this.BuildTypeFromDefinition(reader, handle, rawTypeKind));
     }
 
     private TypeSymbol BuildTypeFromDefinition(MetadataReader reader, TypeDefinitionHandle handle, byte rawTypeKind)
@@ -137,12 +133,7 @@ private TypeSymbol BuildTypeFromDefinition(MetadataReader reader, TypeDefinition
     public TypeSymbol GetTypeFromReference(MetadataReader reader, TypeReferenceHandle handle, byte rawTypeKind)
     {
         var key = new CacheKey(reader, handle);
-        if (!this.cache.TryGetValue(key, out var type))
-        {
-            type = this.BuildTypeFromReference(reader, handle, rawTypeKind);
-            this.cache.Add(key, type);
-        }
-        return type;
+        return this.cache.GetOrAdd(key, _ => this.BuildTypeFromReference(reader, handle, rawTypeKind));
     }
 
     private TypeSymbol BuildTypeFromReference(MetadataReader reader, TypeReferenceHandle handle, byte rawTypeKind)

src/Draco.Dap/Adapter/DebugAdapter.cs

@@ -4,6 +4,7 @@
 using System.Reflection;
 using System.Threading.Tasks;
 using Draco.Dap.Attributes;
+using Draco.JsonRpc;
 
 namespace Draco.Dap.Adapter;
 
@@ -50,7 +51,7 @@ public static async Task RunAsync(this IDebugClient client, IDebugAdapter adapte
         await connection.ListenAsync();
     }
 
-    private static void RegisterAdapterRpcMethods(object target, DebugAdapterConnection connection)
+    private static void RegisterAdapterRpcMethods(object target, IJsonRpcConnection connection)
     {
         // Go through all methods of the adapter and register it
         // NOTE: We go through the interfaces, because interface attributes are not inherited
@@ -62,7 +63,7 @@ private static void RegisterAdapterRpcMethods(object target, DebugAdapterConnect
 
         foreach (var method in adapterMethods)
         {
-            connection.AddRpcMethod(method, target);
+            connection.AddHandler(DebugAdapterMethodHandler.Create(method, target));
         }
     }