使用 Redis 搜索

package com.redislabs.edu.redi2read.boot;

import com.redislabs.edu.redi2read.models.Book;
import com.redislabs.lettusearch.CreateOptions;
import com.redislabs.lettusearch.Field;
import com.redislabs.lettusearch.RediSearchCommands;
import com.redislabs.lettusearch.StatefulRediSearchConnection;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.CommandLineRunner;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import io.lettuce.core.RedisCommandExecutionException;
import lombok.extern.slf4j.Slf4j;

@Component
@Order(6)
@Slf4j
public class CreateBooksSearchIndex implements CommandLineRunner {

  @Autowired
  private StatefulRediSearchConnection<String, String> searchConnection;

  @Value("${app.booksSearchIndexName}")
  private String searchIndexName;

  @Override
  @SuppressWarnings({ "unchecked" })
  public void run(String... args) throws Exception {
    RediSearchCommands<String, String> commands = searchConnection.sync();
    try {
      commands.ftInfo(searchIndexName);
    } catch (RedisCommandExecutionException rcee) {
      if (rcee.getMessage().equals("Unknown Index name")) {

        CreateOptions<String, String> options = CreateOptions.<String, String>builder()//
            .prefix(String.format("%s:", Book.class.getName())).build();

        Field<String> title = Field.text("title").sortable(true).build();
        Field<String> subtitle = Field.text("subtitle").build();
        Field<String> description = Field.text("description").build();
        Field<String> author0 = Field.text("authors.[0]").build();
        Field<String> author1 = Field.text("authors.[1]").build();
        Field<String> author2 = Field.text("authors.[2]").build();
        Field<String> author3 = Field.text("authors.[3]").build();
        Field<String> author4 = Field.text("authors.[4]").build();
        Field<String> author5 = Field.text("authors.[5]").build();
        Field<String> author6 = Field.text("authors.[6]").build();

        commands.create(
          searchIndexName, //
          options, //
          title, subtitle, description, //
          author0, author1, author2, author3, author4, author5, author6 //
        );

        log.info(">>>> Created Books Search Index...");
      }
    }
  }
}