generate server-side exceptions as classes

.github/CODEOWNERS

@@ -9,6 +9,5 @@ smithy-typescript-integ-tests/* @adamthom-amzn @gosar @JordonPhillips
 
 # These are all specific to SSDK functionality.
 smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/ServerCommandGenerator.java @adamthom-amzn @gosar @JordonPhillips
-smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/ServerErrorGenerator.java @adamthom-amzn @gosar @JordonPhillips
 smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/ServerGenerator.java @adamthom-amzn @gosar @JordonPhillips
 smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/ServerSymbolVisitor.java @adamthom-amzn @gosar @JordonPhillips

config/checkstyle/checkstyle.xml

@@ -32,7 +32,7 @@
     <!-- Files must contain a copyright header. -->
     <module name="RegexpHeader">
         <property name="header"
-                  value="/\*\n \* Copyright 20(19|20|21) Amazon\.com, Inc\. or its affiliates\. All Rights Reserved\.\n"/>
+                  value="/\*\n \* Copyright 20(19|20|21|22) Amazon\.com, Inc\. or its affiliates\. All Rights Reserved\.\n"/>
         <property name="fileExtensions" value="java"/>
     </module>
 

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/CodegenVisitor.java

@@ -370,7 +370,6 @@ public Void serviceShape(ServiceShape shape) {
 
         if (settings.generateServerSdk()) {
             generateServiceInterface(shape);
-            generateServerErrors(shape);
         }
 
         if (protocolGenerator != null) {
@@ -470,20 +469,6 @@ private void generateServiceInterface(ServiceShape shape) {
         });
     }
 
-    private void generateServerErrors(ServiceShape service) {
-        final OperationIndex operationIndex = OperationIndex.of(model);
-
-        TopDownIndex.of(model)
-                .getContainedOperations(service)
-                .stream()
-                .flatMap(o -> operationIndex.getErrors(o, service).stream())
-                .distinct()
-                .sorted()
-                .forEachOrdered(error -> writers.useShapeWriter(service, symbolProvider, writer -> {
-                    new ServerErrorGenerator(settings, model, error, symbolProvider, writer).run();
-                }));
-    }
-
     private void generateCommands(ServiceShape shape) {
         // Generate each operation for the service.
         TopDownIndex topDownIndex = TopDownIndex.of(model);

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/HttpProtocolTestGenerator.java

@@ -741,9 +741,9 @@ private void writeServerResponseTest(OperationShape operation, HttpResponseTestC
         writer.write("const request = new HttpRequest({method: 'POST', hostname: 'example.com'});");
 
         // Create a new serializer factory that always returns our test serializer.
-        writer.addImport("SmithyException", "__SmithyException", "@aws-sdk/types");
+        writer.addImport("ServiceException", "__ServiceException", "@aws-smithy/server-common");
         writer.addImport("OperationSerializer", "__OperationSerializer", "@aws-smithy/server-common");
-        writer.openBlock("const serFn: (op: $1T) => __OperationSerializer<$2T<{}>, $1T, __SmithyException> = (op) =>"
+        writer.openBlock("const serFn: (op: $1T) => __OperationSerializer<$2T<{}>, $1T, __ServiceException> = (op) =>"
                         + " { return new TestSerializer(); };", serviceOperationsSymbol, serviceSymbol);
 
         writer.addImport("serializeFrameworkException", null,

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/IndexGenerator.java

@@ -60,6 +60,12 @@ static void writeIndex(
 
         // write export statement for models
         writer.write("export * from \"./models\";");
+
+        // Write each custom export.
+        for (TypeScriptIntegration integration : integrations) {
+            integration.writeAdditionalExports(settings, model, symbolProvider, writer);
+        }
+
         fileManifest.writeFile(Paths.get(CodegenUtils.SOURCE_FOLDER, "index.ts").toString(), writer.toString());
     }
 
@@ -121,11 +127,5 @@ private static void writeClientExports(
         if (operations.stream().anyMatch(operation -> operation.hasTrait(WaitableTrait.ID))) {
             writer.write("export * from \"./waiters\";");
         }
-
-        // Write each custom export.
-        for (TypeScriptIntegration integration : integrations) {
-            integration.writeAdditionalExports(settings, model, symbolProvider, writer);
-        }
-        fileManifest.writeFile(Paths.get(CodegenUtils.SOURCE_FOLDER, "index.ts").toString(), writer.toString());
     }
 }

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/ServerGenerator.java

@@ -63,7 +63,7 @@ static void generateServiceHandler(SymbolProvider symbolProvider,
             writer.write("private readonly service: $T<Context>;", serviceSymbol);
             writer.write("private readonly mux: __Mux<$S, $T>;", serviceShape.getId().getName(), operationsType);
             writer.write("private readonly serializerFactory: <T extends $T>(operation: T) => "
-                            + "__OperationSerializer<$T<Context>, T, __SmithyException>;",
+                            + "__OperationSerializer<$T<Context>, T, __ServiceException>;",
                     operationsType, serviceSymbol);
             writer.write("private readonly serializeFrameworkException: (e: __SmithyFrameworkException, "
                             + "ctx: __ServerSerdeContext) => Promise<__HttpResponse>;");
@@ -87,7 +87,7 @@ static void generateServiceHandler(SymbolProvider symbolProvider,
                 writer.write("service: $T<Context>,", serviceSymbol);
                 writer.write("mux: __Mux<$S, $T>,", serviceShape.getId().getName(), operationsType);
                 writer.write("serializerFactory:<T extends $T>(op: T) => "
-                                + "__OperationSerializer<$T<Context>, T, __SmithyException>,",
+                                + "__OperationSerializer<$T<Context>, T, __ServiceException>,",
                         operationsType, serviceSymbol);
                 writer.write("serializeFrameworkException: (e: __SmithyFrameworkException, ctx: __ServerSerdeContext) "
                         + "=> Promise<__HttpResponse>,");
@@ -208,7 +208,7 @@ private static void addCommonHandlerImports(TypeScriptWriter writer) {
         writer.addImport("SmithyFrameworkException", "__SmithyFrameworkException", "@aws-smithy/server-common");
         writer.addImport("HttpRequest", "__HttpRequest", "@aws-sdk/protocol-http");
         writer.addImport("HttpResponse", "__HttpResponse", "@aws-sdk/protocol-http");
-        writer.addImport("SmithyException", "__SmithyException", "@aws-sdk/types");
+        writer.addImport("ServiceException", "__ServiceException", "@aws-smithy/server-common");
         writer.addImport("ValidationCustomizer", "__ValidationCustomizer", "@aws-smithy/server-common");
     }
 
@@ -226,7 +226,7 @@ private static void writeHandleFunction(TypeScriptWriter writer) {
                     writer.write("request: __HttpRequest,");
                     writer.write("context: Context,");
                     writer.write("operationName: O,");
-                    writer.write("serializer: __OperationSerializer<S, O, __SmithyException>,");
+                    writer.write("serializer: __OperationSerializer<S, O, __ServiceException>,");
                     writer.write("operation: __Operation<__OperationInput<S[O]>, __OperationOutput<S[O]>, Context>,");
                     writer.write("serializeFrameworkException: (e: __SmithyFrameworkException, "
                             + "ctx: __ServerSerdeContext) => Promise<__HttpResponse>,");

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/StructureGenerator.java

@@ -20,7 +20,6 @@
 
 import java.util.List;
 import java.util.stream.Collectors;
-import java.util.stream.Stream;
 import software.amazon.smithy.codegen.core.Symbol;
 import software.amazon.smithy.codegen.core.SymbolProvider;
 import software.amazon.smithy.codegen.core.SymbolReference;
@@ -140,61 +139,6 @@ private void renderNonErrorStructure() {
         renderStructureNamespace(config, includeValidation);
     }
 
-    /**
-     * Error structures generate interfaces that extend from SmithyException
-     * and add the appropriate fault property.
-     *
-     * <p>Given the following Smithy structure:
-     *
-     * <pre>{@code
-     * namespace smithy.example
-     *
-     * @error("client")
-     * structure NoSuchResource {
-     *     @required
-     *     resourceType: String
-     * }
-     * }</pre>
-     *
-     * <p>The following TypeScript is generated:
-     *
-     * <pre>{@code
-     * import {
-     *     SmithyException as __SmithyException
-     * } from "@aws-sdk/types";
-     *
-     * export interface NoSuchResource extends __SmithyException, $MetadataBearer {
-     *   name: "NoSuchResource";
-     *   $fault: "client";
-     *   resourceType: string | undefined;
-     * }
-     * }</pre>
-     */
-    private void renderErrorStructure() {
-        ErrorTrait errorTrait = shape.getTrait(ErrorTrait.class).orElseThrow(IllegalStateException::new);
-        Symbol symbol = symbolProvider.toSymbol(shape);
-        writer.writeShapeDocs(shape);
-
-        // Find symbol references with the "extends" property, and add SmithyException.
-        writer.addImport("SmithyException", "__SmithyException", "@aws-sdk/types");
-        String extendsFrom = Stream.concat(
-                Stream.of("__SmithyException"),
-                symbol.getReferences().stream()
-                        .filter(ref -> ref.getProperty(SymbolVisitor.IMPLEMENTS_INTERFACE_PROPERTY).isPresent())
-                        .map(SymbolReference::getAlias)
-                ).collect(Collectors.joining(", "));
-
-        writer.openBlock("export interface $L extends $L {", symbol.getName(), extendsFrom);
-        writer.write("name: $S;", shape.getId().getName());
-        writer.write("$$fault: $S;", errorTrait.getValue());
-        HttpProtocolGeneratorUtils.writeRetryableTrait(writer, shape, ";");
-        StructuredMemberWriter structuredMemberWriter = new StructuredMemberWriter(
-                model, symbolProvider, shape.getAllMembers().values());
-        structuredMemberWriter.writeMembers(writer, shape);
-        writer.closeBlock("}"); // interface
-        writer.write("");
-    }
-
     private void renderStructureNamespace(StructuredMemberWriter structuredMemberWriter, boolean includeValidation) {
         Symbol symbol = symbolProvider.toSymbol(shape);
         writer.openBlock("export namespace $L {", "}", symbol.getName(), () -> {
@@ -228,4 +172,68 @@ private void renderStructureNamespace(StructuredMemberWriter structuredMemberWri
             });
         });
     }
+
+    /**
+     * Error structures generate classes that extend from service base exception
+     * (ServiceException in case of server SDK), and add the appropriate fault
+     * property.
+     *
+     * <p>Given the following Smithy structure:
+     *
+     * <pre>{@code
+     * namespace smithy.example
+     *
+     * @error("client")
+     * structure NoSuchResource {
+     *     @required
+     *     resourceType: String
+     * }
+     * }</pre>
+     *
+     * <p>The following TypeScript is generated:
+     *
+     * <pre>{@code
+     * import { ExceptionOptionType as __ExceptionOptionType } from "@aws-sdk/smithy-client";
+     * import { FooServiceException as __BaseException } from "./FooServiceException";
+     * // In server SDK:
+     * // import { ServiceException as __BaseException } from "@aws-smithy/server-common";
+     *
+     * export class NoSuchResource extends __BaseException {
+     *   name: "NoSuchResource";
+     *   $fault: "client";
+     *   resourceType: string | undefined;
+     *   // @internal
+     *   constructor(opts: __ExceptionOptionType<NoSuchResource, __BaseException>) {
+     *     super({
+     *       name: "NoSuchResource",
+     *       $fault: "client",
+     *       ...opts
+     *     });
+     *     Object.setPrototypeOf(this, NoSuchResource.prototype);
+     *     this.resourceType = opts.resourceType;
+     *   }
+     * }
+     * }</pre>
+     */
+    private void renderErrorStructure() {
+        ErrorTrait errorTrait = shape.getTrait(ErrorTrait.class).orElseThrow(IllegalStateException::new);
+        Symbol symbol = symbolProvider.toSymbol(shape);
+        writer.writeShapeDocs(shape);
+        boolean isServerSdk = this.includeValidation;
+        writer.openBlock("export class $T extends $L {", symbol, "__BaseException");
+        writer.write("readonly name: $1S = $1S;", shape.getId().getName());
+        writer.write("readonly $$fault: $1S = $1S;", errorTrait.getValue());
+        if (!isServerSdk) {
+            HttpProtocolGeneratorUtils.writeRetryableTrait(writer, shape, ";");
+        }
+        StructuredMemberWriter structuredMemberWriter = new StructuredMemberWriter(model, symbolProvider,
+                shape.getAllMembers().values());
+        // since any error interface must extend from JavaScript Error interface, message member is already
+        // required in the JavaScript Error interface
+        structuredMemberWriter.skipMembers.add("message");
+        structuredMemberWriter.writeMembers(writer, shape);
+        structuredMemberWriter.writeErrorConstructor(writer, shape, isServerSdk);
+        writer.closeBlock("}");
+        writer.write("");
+    }
 }

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/StructuredMemberWriter.java

@@ -124,22 +124,29 @@ void writeMemberFilterSensitiveLog(TypeScriptWriter writer, MemberShape member,
     }
 
     /**
-     * Writes a constructor function that takes in an object allowing modeled fields to be initialized.
+     * Writes constructor of SDK exception classes.
      */
-    void writeConstructor(TypeScriptWriter writer, Shape shape) {
-        writer.openBlock("constructor(opts: {", "}) {", () -> {
-            writeMembers(writer, shape);
+    void writeErrorConstructor(TypeScriptWriter writer, Shape shape, boolean isServerSdk) {
+        ErrorTrait errorTrait = shape.getTrait(ErrorTrait.class).orElseThrow(IllegalStateException::new);
+        Symbol symbol = symbolProvider.toSymbol(shape);
+        if (!isServerSdk) {
+            writer.writeDocs("@internal");
+        }
+        writer.addImport("ExceptionOptionType", "__ExceptionOptionType",
+                TypeScriptDependency.AWS_SMITHY_CLIENT.packageName);
+        writer.openBlock("constructor(opts: __ExceptionOptionType<$L, __BaseException>) {", symbol.getName());
+        writer.openBlock("super({", "});", () -> {
+            writer.write("name: $S,", shape.getId().getName());
+            writer.write("$$fault: $S,", errorTrait.getValue());
+            writer.write("...opts");
         });
-        writer.indent();
-
+        writer.write("Object.setPrototypeOf(this, $L.prototype);", symbol.getName());
         for (MemberShape member : members) {
             if (skipMembers.contains(member.getMemberName())) {
                 continue;
             }
-
             writer.write("this.${1L} = opts.${1L};", getSanitizedMemberName(member));
         }
-
         writer.closeBlock("}");
     }