[PoC] feat: add Endpoint Discovery

clients/client-timestream-query/TimestreamQueryClient.ts

@@ -1,5 +1,9 @@
 import { CancelQueryCommandInput, CancelQueryCommandOutput } from "./commands/CancelQueryCommand";
-import { DescribeEndpointsCommandInput, DescribeEndpointsCommandOutput } from "./commands/DescribeEndpointsCommand";
+import {
+  DescribeEndpointsCommand,
+  DescribeEndpointsCommandInput,
+  DescribeEndpointsCommandOutput,
+} from "./commands/DescribeEndpointsCommand";
 import { QueryCommandInput, QueryCommandOutput } from "./commands/QueryCommand";
 import { ClientDefaultValues as __ClientDefaultValues } from "./runtimeConfig";
 import {
@@ -17,6 +21,11 @@ import {
   getHostHeaderPlugin,
   resolveHostHeaderConfig,
 } from "@aws-sdk/middleware-host-header";
+import {
+  EndpointDiscoveryInputConfig,
+  EndpointDiscoveryResolvedConfig,
+  resolveEndpointDiscoveryConfig,
+} from "@aws-sdk/middleware-endpoint-discovery";
 import { getLoggerPlugin } from "@aws-sdk/middleware-logger";
 import { RetryInputConfig, RetryResolvedConfig, getRetryPlugin, resolveRetryConfig } from "@aws-sdk/middleware-retry";
 import {
@@ -150,11 +159,19 @@ export interface ClientDefaults extends Partial<__SmithyResolvedConfiguration<__
    * @internal
    */
   defaultUserAgentProvider?: Provider<__UserAgent>;
+
+  /**
+   * The provider which populates default for endpointDisvoveryEnabled configuration, if it's
+   * not passed during client creation.
+   * @internal
+   */
+  endpointDiscoveryEnabledProvider?: Provider<boolean | undefined>;
 }
 
 type TimestreamQueryClientConfigType = Partial<__SmithyConfiguration<__HttpHandlerOptions>> &
   ClientDefaults &
   RegionInputConfig &
+  EndpointDiscoveryInputConfig &
   EndpointsInputConfig &
   RetryInputConfig &
   HostHeaderInputConfig &
@@ -168,6 +185,7 @@ export interface TimestreamQueryClientConfig extends TimestreamQueryClientConfig
 type TimestreamQueryClientResolvedConfigType = __SmithyResolvedConfiguration<__HttpHandlerOptions> &
   Required<ClientDefaults> &
   RegionResolvedConfig &
+  EndpointDiscoveryResolvedConfig &
   EndpointsResolvedConfig &
   RetryResolvedConfig &
   HostHeaderResolvedConfig &
@@ -205,8 +223,9 @@ export class TimestreamQueryClient extends __Client<
     let _config_4 = resolveHostHeaderConfig(_config_3);
     let _config_5 = resolveAwsAuthConfig(_config_4);
     let _config_6 = resolveUserAgentConfig(_config_5);
-    super(_config_6);
-    this.config = _config_6;
+    let _config_7 = resolveEndpointDiscoveryConfig(_config_6, DescribeEndpointsCommand);
+    super(_config_7);
+    this.config = _config_7;
     this.middlewareStack.use(getRetryPlugin(this.config));
     this.middlewareStack.use(getContentLengthPlugin(this.config));
     this.middlewareStack.use(getHostHeaderPlugin(this.config));

clients/client-timestream-query/commands/QueryCommand.ts

@@ -13,6 +13,7 @@ import {
   MetadataBearer as __MetadataBearer,
   SerdeContext as __SerdeContext,
 } from "@aws-sdk/types";
+import { getEndpointDiscoveryCommandPlugin } from "@aws-sdk/middleware-endpoint-discovery";
 
 export interface QueryCommandInput extends QueryRequest {}
 export interface QueryCommandOutput extends QueryResponse, __MetadataBearer {}
@@ -54,7 +55,15 @@ export class QueryCommand extends $Command<QueryCommandInput, QueryCommandOutput
     configuration: TimestreamQueryClientResolvedConfig,
     options?: __HttpHandlerOptions
   ): Handler<QueryCommandInput, QueryCommandOutput> {
+    const isDiscoveredEndpointRequired = true;
     this.middlewareStack.use(getSerdePlugin(configuration, this.serialize, this.deserialize));
+    this.middlewareStack.use(
+      getEndpointDiscoveryCommandPlugin(configuration, {
+        isDiscoveredEndpointRequired,
+        clientStack,
+        options,
+      })
+    );
 
     const stack = clientStack.concat(this.middlewareStack);
 

clients/client-timestream-query/package.json

@@ -34,6 +34,7 @@
     "@aws-sdk/hash-node": "3.13.1",
     "@aws-sdk/invalid-dependency": "3.13.1",
     "@aws-sdk/middleware-content-length": "3.13.1",
+    "@aws-sdk/middleware-endpoint-discovery": "3.0.0",
     "@aws-sdk/middleware-host-header": "3.13.1",
     "@aws-sdk/middleware-logger": "3.13.1",
     "@aws-sdk/middleware-retry": "3.13.1",

clients/client-timestream-query/runtimeConfig.browser.ts

@@ -25,6 +25,7 @@ export const ClientDefaultValues: Required<ClientDefaults> = {
     serviceId: ClientSharedValues.serviceId,
     clientVersion: packageInfo.version,
   }),
+  endpointDiscoveryEnabledProvider: () => Promise.resolve(undefined),
   maxAttempts: DEFAULT_MAX_ATTEMPTS,
   region: invalidProvider("Region is missing"),
   requestHandler: new FetchHttpHandler(),

clients/client-timestream-query/runtimeConfig.ts

@@ -4,6 +4,7 @@ import { decorateDefaultCredentialProvider } from "@aws-sdk/client-sts";
 import { NODE_REGION_CONFIG_FILE_OPTIONS, NODE_REGION_CONFIG_OPTIONS } from "@aws-sdk/config-resolver";
 import { defaultProvider as credentialDefaultProvider } from "@aws-sdk/credential-provider-node";
 import { Hash } from "@aws-sdk/hash-node";
+import { NODE_ENDPOINT_DISCOVERY_CONFIG_OPTIONS } from "@aws-sdk/middleware-endpoint-discovery";
 import { NODE_MAX_ATTEMPT_CONFIG_OPTIONS } from "@aws-sdk/middleware-retry";
 import { loadConfig as loadNodeConfig } from "@aws-sdk/node-config-provider";
 import { NodeHttpHandler, streamCollector } from "@aws-sdk/node-http-handler";
@@ -28,6 +29,7 @@ export const ClientDefaultValues: Required<ClientDefaults> = {
     serviceId: ClientSharedValues.serviceId,
     clientVersion: packageInfo.version,
   }),
+  endpointDiscoveryEnabledProvider: loadNodeConfig(NODE_ENDPOINT_DISCOVERY_CONFIG_OPTIONS),
   maxAttempts: loadNodeConfig(NODE_MAX_ATTEMPT_CONFIG_OPTIONS),
   region: loadNodeConfig(NODE_REGION_CONFIG_OPTIONS, NODE_REGION_CONFIG_FILE_OPTIONS),
   requestHandler: new NodeHttpHandler(),

packages/endpoint-cache/LICENSE

@@ -0,0 +1,201 @@
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packages/endpoint-cache/README.md

@@ -0,0 +1,17 @@
+# @aws-sdk/endpoint-cache
+
+[![NPM version](https://img.shields.io/npm/v/@aws-sdk/endpoint-cache/latest.svg)](https://www.npmjs.com/package/@aws-sdk/endpoint-cache)
+[![NPM downloads](https://img.shields.io/npm/dm/@aws-sdk/endpoint-cache.svg)](https://www.npmjs.com/package/@aws-sdk/endpoint-cache)
+
+> An internal package
+
+## Usage
+
+You probably shouldn't, at least directly.
+
+## EndpointCache
+
+- uses `mnemonist/lru-cache` for storing the cache.
+- the `set` operation stores milliseconds elapsed since the UNIX epoch in Expires param based on CachePeriodInMinutes provided in Endpoint.
+- the `get` operation returns all un-expired endpoints with their Expires values.
+- the `getEndpoint` operation returns a randomly selected un-expired endpoint.

packages/endpoint-cache/jest.config.js

@@ -0,0 +1,5 @@
+const base = require("../../jest.config.base.js");
+
+module.exports = {
+  ...base,
+};

packages/endpoint-cache/package.json

@@ -0,0 +1,45 @@
+{
+  "name": "@aws-sdk/endpoint-cache",
+  "version": "3.0.0",
+  "scripts": {
+    "prepublishOnly": "yarn build && downlevel-dts dist/types dist/types/ts3.4",
+    "build:cjs": "tsc -p tsconfig.cjs.json",
+    "build:es": "tsc -p tsconfig.es.json",
+    "build": "yarn build:es && yarn build:cjs",
+    "test": "jest --passWithNoTests"
+  },
+  "author": {
+    "name": "AWS SDK for JavaScript Team",
+    "url": "https://aws.amazon.com/javascript/"
+  },
+  "license": "Apache-2.0",
+  "main": "./dist/cjs/index.js",
+  "module": "./dist/es/index.js",
+  "types": "./dist/types/index.d.ts",
+  "dependencies": {
+    "mnemonist": "0.38.3",
+    "tslib": "^2.0.0"
+  },
+  "devDependencies": {
+    "@types/jest": "^26.0.4",
+    "@types/node": "^10.0.0",
+    "jest": "^26.1.0",
+    "typescript": "~4.2.4"
+  },
+  "engines": {
+    "node": ">= 10.0.0"
+  },
+  "typesVersions": {
+    "<4.0": {
+      "types/*": [
+        "types/ts3.4/*"
+      ]
+    }
+  },
+  "homepage": "https://github.com/aws/aws-sdk-js-v3/tree/main/packages/endpoint-cache",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/aws/aws-sdk-js-v3.git",
+    "directory": "packages/endpoint-cache"
+  }
+}