46 lines
1.5 KiB
JavaScript
46 lines
1.5 KiB
JavaScript
import { constructStack } from "@smithy/middleware-stack";
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export class Client {
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config;
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middlewareStack = constructStack();
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initConfig;
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handlers;
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constructor(config) {
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this.config = config;
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}
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send(command, optionsOrCb, cb) {
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const options = typeof optionsOrCb !== "function" ? optionsOrCb : undefined;
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const callback = typeof optionsOrCb === "function" ? optionsOrCb : cb;
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const useHandlerCache = options === undefined && this.config.cacheMiddleware === true;
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let handler;
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if (useHandlerCache) {
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if (!this.handlers) {
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this.handlers = new WeakMap();
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}
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const handlers = this.handlers;
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if (handlers.has(command.constructor)) {
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handler = handlers.get(command.constructor);
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}
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else {
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handler = command.resolveMiddleware(this.middlewareStack, this.config, options);
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handlers.set(command.constructor, handler);
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}
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}
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else {
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delete this.handlers;
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handler = command.resolveMiddleware(this.middlewareStack, this.config, options);
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}
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if (callback) {
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handler(command)
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.then((result) => callback(null, result.output), (err) => callback(err))
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.catch(() => { });
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}
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else {
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return handler(command).then((result) => result.output);
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}
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}
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destroy() {
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this.config?.requestHandler?.destroy?.();
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delete this.handlers;
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}
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}
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