load different sdk defaults value from defaults mode (smithy-lang#11) (smithy-lang#495)

* load different sdk defaults value from defaults mode

* resolveDefaultsModeConfig to accept a hash

* simplify node runtime config defaults mode resolution

* import defaults mode interfaces from smithy-client package

Author: AllanZhengYP

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

@@ -44,9 +44,9 @@ final class RuntimeConfigGenerator {
     private final Map<String, Consumer<TypeScriptWriter>> nodeRuntimeConfigDefaults = MapUtils.of(
             "requestHandler", writer -> {
                 writer.addDependency(TypeScriptDependency.AWS_SDK_NODE_HTTP_HANDLER);
-                writer.addImport("NodeHttpHandler", "NodeHttpHandler",
+                writer.addImport("NodeHttpHandler", "RequestHandler",
                         TypeScriptDependency.AWS_SDK_NODE_HTTP_HANDLER.packageName);
-                writer.write("new NodeHttpHandler()");
+                writer.write("new RequestHandler(defaultConfigProvider)");
             },
             "sha256", writer -> {
                 writer.addDependency(TypeScriptDependency.AWS_SDK_HASH_NODE);
@@ -94,9 +94,9 @@ final class RuntimeConfigGenerator {
     private final Map<String, Consumer<TypeScriptWriter>> browserRuntimeConfigDefaults = MapUtils.of(
             "requestHandler", writer -> {
                 writer.addDependency(TypeScriptDependency.AWS_SDK_FETCH_HTTP_HANDLER);
-                writer.addImport("FetchHttpHandler", "FetchHttpHandler",
+                writer.addImport("FetchHttpHandler", "RequestHandler",
                         TypeScriptDependency.AWS_SDK_FETCH_HTTP_HANDLER.packageName);
-                writer.write("new FetchHttpHandler()");
+                writer.write("new RequestHandler(defaultConfigProvider)");
             },
             "sha256", writer -> {
                 writer.addDependency(TypeScriptDependency.AWS_CRYPTO_SHA256_BROWSER);

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

@@ -69,6 +69,9 @@ public enum TypeScriptDependency implements SymbolDependencyContainer {
 
     AWS_SDK_UTIL_WAITERS("dependencies", "@aws-sdk/util-waiter",  false),
 
+    AWS_SDK_UTIL_DEFAULTS_MODE_NODE("dependencies", "@aws-sdk/util-defaults-mode-node", true),
+    AWS_SDK_UTIL_DEFAULTS_MODE_BROWSER("dependencies", "@aws-sdk/util-defaults-mode-browser", true),
+
     // Conditionally added when httpChecksumRequired trait exists
     MD5_BROWSER("dependencies", "@aws-sdk/md5-js", false),
     STREAM_HASHER_NODE("dependencies", "@aws-sdk/hash-stream-node", false),

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/integration/AddDefaultsModeDependency.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+package software.amazon.smithy.typescript.codegen.integration;
+
+import software.amazon.smithy.codegen.core.SymbolProvider;
+import software.amazon.smithy.model.Model;
+import software.amazon.smithy.typescript.codegen.TypeScriptDependency;
+import software.amazon.smithy.typescript.codegen.TypeScriptSettings;
+import software.amazon.smithy.typescript.codegen.TypeScriptWriter;
+import software.amazon.smithy.utils.SmithyInternalApi;
+
+/**
+ * Adds defaults mode dependencies if needed.
+ */
+@SmithyInternalApi
+public class AddDefaultsModeDependency implements TypeScriptIntegration {
+    @Override
+    public void addConfigInterfaceFields(
+            TypeScriptSettings settings,
+            Model model,
+            SymbolProvider symbolProvider,
+            TypeScriptWriter writer
+    ) {
+        // Dependencies used in the default runtime config template.
+        writer.addDependency(TypeScriptDependency.AWS_SDK_UTIL_DEFAULTS_MODE_BROWSER);
+        writer.addDependency(TypeScriptDependency.AWS_SDK_UTIL_DEFAULTS_MODE_NODE);
+        writer.addImport("DefaultsMode", "DefaultsMode", TypeScriptDependency.AWS_SMITHY_CLIENT.packageName);
+        writer.addImport("Provider", "Provider", TypeScriptDependency.AWS_SDK_TYPES.packageName);
+        writer.writeDocs("The {@link DefaultsMode} that will be used to determine how certain default configuration "
+                + "options are resolved in the SDK.");
+        writer.write("defaultsMode?: DefaultsMode | Provider<DefaultsMode>;");
+    }
+}

smithy-typescript-codegen/src/main/resources/META-INF/services/software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration

@@ -1,2 +1,3 @@
 software.amazon.smithy.typescript.codegen.integration.AddEventStreamDependency
-software.amazon.smithy.typescript.codegen.integration.AddChecksumRequiredDependency
+software.amazon.smithy.typescript.codegen.integration.AddChecksumRequiredDependency
+software.amazon.smithy.typescript.codegen.integration.AddDefaultsModeDependency

smithy-typescript-codegen/src/main/resources/software/amazon/smithy/typescript/codegen/runtimeConfig.browser.ts.template

@@ -1,15 +1,20 @@
 import { ${clientConfigName} } from "${clientModuleName}";
 import { getRuntimeConfig as getSharedRuntimeConfig } from "./runtimeConfig.shared";
+import { loadConfigsForDefaultMode } from "@aws-sdk/smithy-client";
+import { resolveDefaultsModeConfig } from "@aws-sdk/util-defaults-mode-browser";
 
 /**
  * @internal
  */
 export const getRuntimeConfig = (config: ${clientConfigName}) => {
+  const defaultsMode = resolveDefaultsModeConfig(config);
+  const defaultConfigProvider = () => defaultsMode().then(loadConfigsForDefaultMode);
   const clientSharedValues = getSharedRuntimeConfig(config);
   return {
     ...clientSharedValues,
     ...config,
     runtime: "browser",
+    defaultsMode,
 ${customizations}
   };
 };

smithy-typescript-codegen/src/main/resources/software/amazon/smithy/typescript/codegen/runtimeConfig.ts.template

@@ -1,15 +1,20 @@
 import { ${clientConfigName} } from "${clientModuleName}";
 import { getRuntimeConfig as getSharedRuntimeConfig } from "./runtimeConfig.shared";
+import { loadConfigsForDefaultMode } from "@aws-sdk/smithy-client";
+import { resolveDefaultsModeConfig } from "@aws-sdk/util-defaults-mode-node";
 
 /**
  * @internal
  */
 export const getRuntimeConfig = (config: ${clientConfigName}) => {
+  const defaultsMode = resolveDefaultsModeConfig(config);
+  const defaultConfigProvider = () => defaultsMode().then(loadConfigsForDefaultMode);
   const clientSharedValues = getSharedRuntimeConfig(config);
   return {
     ...clientSharedValues,
     ...config,
     runtime: "node",
+    defaultsMode,
 ${customizations}
   };
 };