Spring Data ElasticSearch を使い始めたばかりです。独自のリポジトリを実装しましたが、エンティティを保存しようとすると null ポインター例外が発生します。次のコードを取得しました。これは単なるテスト コードです。
package org.test.elasticsearch.models;
import org.springframework.data.annotation.Id;
import org.springframework.data.elasticsearch.annotations.Document;
@Document(indexName = "test", type = "book", shards = 1, replicas = 0)
public class Book {
@Id
private String id;
private String title;
private String author;
public Book(final String id, final String title, final String author) {
this.id = id;
this.title = title;
this.author = author;
}
public String getId() {
return this.id;
}
public void setId(final String id) {
this.id = id;
}
public String getTitle() {
return this.title;
}
public void setTitle(final String title) {
this.title = title;
}
public String getAuthor() {
return this.author;
}
public void setAuthor(final String author) {
this.author = author;
}
}
package org.test.elasticsearch.configs;
import org.elasticsearch.node.NodeBuilder;
import org.test.elasticsearch.repositories.implementations.BookRepositoryImpl;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.elasticsearch.core.ElasticsearchOperations;
import org.springframework.data.elasticsearch.core.ElasticsearchTemplate;
import org.springframework.data.elasticsearch.repository.config.EnableElasticsearchRepositories;
@Configuration
@EnableElasticsearchRepositories("org.test.elasticsearch.repositories")
public class ElasticsearchConfiguration {
@Bean
public ElasticsearchOperations elasticsearchTemplate() {
final NodeBuilder nodeBuilder = new NodeBuilder();
return new ElasticsearchTemplate(nodeBuilder.local(true).clusterName("elasticsearch").node().client());
}
@Bean
public BookRepositoryImpl bookRepositoryImplementation() {
return new BookRepositoryImpl();
}
}
package org.test.elasticsearch.repositories;
import org.test.elasticsearch.models.Book;
import org.springframework.data.elasticsearch.repository.ElasticsearchCrudRepository;
public interface BookRepository extends ElasticsearchCrudRepository<Book, String>, BookRepositoryCustom {
// query methods
}
package org.test.webapp;
import org.test.elasticsearch.models.Book;
import org.test.elasticsearch.models.Book.BookBuilder;
import org.test.elasticsearch.repositories.BookRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
@Configuration
@ComponentScan
@EnableAutoConfiguration
public class Test {
@Autowired
static BookRepository BookRepository;
public static void main(final String[] args) {
SpringApplication.run(test.class, args);
final Book testBook = new Book("12345", "TestTitle", "TestAuthor");
BookRepository.save(testBook);
}
}
それが私のコードです。Spring Boot アプリケーションを実行すると、次のメッセージが表示されます。
Exception in thread "main" java.lang.NullPointerException
at org.test.webapp.test.main(Test.java:24)
誰にもアイデアはありますか?もう 1 つの質問: カスタム リポジトリで ElasticsearchTemplate を IndexQuery と共に使用して、エンティティを保存する必要があるのはいつですか?