Usar um aplicativo Java para interagir com um bot do Amazon Lex V2

O AWS SDK para Java 2.0 fornece uma interface que você pode usar nos aplicativos Java para interagir com os bots. Use o SDK para Java para criar aplicativos cliente para os usuários.

O aplicativo a seguir interage com o OrderFlowers bot que você criou emExercício 1: criar um bot a partir de um exemplo. Ele usa o LexRuntimeV2Client do SDK for Java para chamar RecognizeTexta operação e conduzir uma conversa com o bot.

A saída da conversa parece com o exemplo a seguir:

User : I would like to order flowers
Bot  : What type of flowers would you like to order?
User : 1 dozen roses
Bot  : What day do you want the dozen roses to be picked up?
User : Next Monday
Bot  : At what time do you want the dozen roses to be picked up?
User : 5 in the evening
Bot  : Okay, your dozen roses will be ready for pickup by 17:00 on 2021-01-04.  Does this sound okay?
User : Yes
Bot  : Thanks.

Para as estruturas JSON enviadas entre o aplicativo cliente e o bot Amazon Lex V2, consulte Exercício 2: revisar o fluxo da conversação.

Para executar o aplicativo de amostra, é necessário fornecer as seguintes informações:

Os aplicativos usam uma função chamada getRecognizeTextRequest para criar solicitações individuais para o bot. A função cria uma solicitação com os parâmetros necessários para enviar ao Amazon Lex V2.

package com.lex.recognizetext.sample;

import software.amazon.awssdk.auth.credentials.AwsBasicCredentials;
import software.amazon.awssdk.auth.credentials.AwsCredentialsProvider;
import software.amazon.awssdk.auth.credentials.StaticCredentialsProvider;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.lexruntimev2.LexRuntimeV2Client;
import software.amazon.awssdk.services.lexruntimev2.model.RecognizeTextRequest;
import software.amazon.awssdk.services.lexruntimev2.model.RecognizeTextResponse;

import java.net.URISyntaxException;
import java.util.UUID;


/**
 * This is a sample application to interact with a bot using RecognizeText API.
 */
public class OrderFlowersSampleApplication {

    public static void main(String[] args) throws URISyntaxException, InterruptedException {
        String botId = "";
        String botAliasId = "";
        String localeId = "en_US";
        String accessKey = "";
        String secretKey = "";
        String sessionId = UUID.randomUUID().toString();
        Region region = Region.US_EAST_1; // pick an appropriate region

        AwsBasicCredentials awsCreds = AwsBasicCredentials.create(accessKey, secretKey);
        AwsCredentialsProvider awsCredentialsProvider = StaticCredentialsProvider.create(awsCreds);

        LexRuntimeV2Client lexV2Client = LexRuntimeV2Client
                .builder()
                .credentialsProvider(awsCredentialsProvider)
                .region(region)
                .build();

        // utterance 1
        String userInput = "I would like to order flowers";
        RecognizeTextRequest recognizeTextRequest = getRecognizeTextRequest(botId, botAliasId, localeId, sessionId, userInput);
        RecognizeTextResponse recognizeTextResponse = lexV2Client.recognizeText(recognizeTextRequest);

        System.out.println("User : " + userInput);
        recognizeTextResponse.messages().forEach(message -> {
            System.out.println("Bot : " + message.content());
        });

        // utterance 2
        userInput = "1 dozen roses";
        recognizeTextRequest = getRecognizeTextRequest(botId, botAliasId, localeId, sessionId, userInput);
        recognizeTextResponse = lexV2Client.recognizeText(recognizeTextRequest);

        System.out.println("User : " + userInput);
        recognizeTextResponse.messages().forEach(message -> {
            System.out.println("Bot : " + message.content());
        });

        // utterance 3
        userInput = "next monday";
        recognizeTextRequest = getRecognizeTextRequest(botId, botAliasId, localeId, sessionId, userInput);
        recognizeTextResponse = lexV2Client.recognizeText(recognizeTextRequest);

        System.out.println("User : " + userInput);
        recognizeTextResponse.messages().forEach(message -> {
            System.out.println("Bot : " + message.content());
        });

        // utterance 4
        userInput = "5 in evening";
        recognizeTextRequest = getRecognizeTextRequest(botId, botAliasId, localeId, sessionId, userInput);
        recognizeTextResponse = lexV2Client.recognizeText(recognizeTextRequest);

        System.out.println("User : " + userInput);
        recognizeTextResponse.messages().forEach(message -> {
            System.out.println("Bot : " + message.content());
        });

        // utterance 5
        userInput = "Yes";
        recognizeTextRequest = getRecognizeTextRequest(botId, botAliasId, localeId, sessionId, userInput);
        recognizeTextResponse = lexV2Client.recognizeText(recognizeTextRequest);

        System.out.println("User : " + userInput);
        recognizeTextResponse.messages().forEach(message -> {
            System.out.println("Bot : " + message.content());
        });
    }

    private static RecognizeTextRequest getRecognizeTextRequest(String botId, String botAliasId, String localeId, String sessionId, String userInput) {
        RecognizeTextRequest recognizeTextRequest = RecognizeTextRequest.builder()
                .botAliasId(botAliasId)
                .botId(botId)
                .localeId(localeId)
                .sessionId(sessionId)
                .text(userInput)
                .build();
        return recognizeTextRequest;
    }
}