本文节选自《Netkiller Java 手札》 作者：netkiller 网站: http://www.netkiller.cn
5.27. Spring boot with Elasticsearch 5.5.x
Spring data 目前还不支持 Elasticsearch 5.5.x 所以需要通过注入 TransportClient 这就意味着使用 5.5.x 版本你无法使用 ElasticsearchRepository 这种特性，只能通过官方的 TransportClient 操作 Elasticsearch。
5.27.1. Maven
Elasticsearch 依赖下来四个包
<dependency> <groupId>org.elasticsearch</groupId> <artifactId>elasticsearch</artifactId> <version>5.5.1</version> </dependency> <dependency> <groupId>org.elasticsearch.client</groupId> <artifactId>transport</artifactId> <version>5.5.1</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-api</artifactId> <version>2.8.2</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>2.8.2</version> </dependency>
下面是我的完整例子
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.example</groupId> <artifactId>api</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>api</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.6.RELEASE</version> <relativePath /> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> </dependency> --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <!-- https://mvnrepository.com/artifact/javax.persistence/persistence-api --> <dependency> <groupId>javax.persistence</groupId> <artifactId>persistence-api</artifactId> <version>1.0.2</version> </dependency> <!-- https://mvnrepository.com/artifact/org.json/json --> <dependency> <groupId>org.json</groupId> <artifactId>json</artifactId> </dependency> <dependency> <groupId>org.elasticsearch</groupId> <artifactId>elasticsearch</artifactId> <version>5.5.1</version> </dependency> <dependency> <groupId>org.elasticsearch.client</groupId> <artifactId>transport</artifactId> <version>5.5.1</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-api</artifactId> <version>2.8.2</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>2.8.2</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <configuration> <skip>true</skip> </configuration> </plugin> </plugins> </build> </project>
5.27.2. Application
package cn.netkiller;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;
import org.springframework.scheduling.annotation.EnableScheduling;
@SpringBootApplication
@EnableAutoConfiguration
@ComponentScan
@EnableMongoRepositories
@EnableJpaRepositories
@EnableScheduling
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}5.27.3. application.properties
注意：Elasticsearch 连接地址是 9300， 而不是 9200
spring.data.elasticsearch.cluster-nodes=172.0.0.1:9300 spring.data.elasticsearch.local=false spring.data.elasticsearch.properties.transport.tcp.connect_timeout=60s
5.27.4. ElasticsearchConfiguration
package com.example.api.config;
import java.net.InetAddress;
import java.net.UnknownHostException;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.transport.client.PreBuiltTransportClient;
import org.elasticsearch.common.settings.Settings;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
@Configuration
public class ElasticsearchConfiguration implements FactoryBean<TransportClient>, InitializingBean, DisposableBean {
private static final Logger logger = LoggerFactory.getLogger(ElasticsearchConfiguration.class);
@Value("${spring.data.elasticsearch.cluster-nodes}")
private String clusterNodes;
private TransportClient transportClient;
private PreBuiltTransportClient preBuiltTransportClient;
@Override
public void destroy() throws Exception {
try {
logger.info("Closing elasticSearch client");
if (transportClient != null) {
transportClient.close();
}
} catch (final Exception e) {
logger.error("Error closing ElasticSearch client: ", e);
}
}
@Override
public TransportClient getObject() throws Exception {
return transportClient;
}
@Override
public Class<TransportClient> getObjectType() {
return TransportClient.class;
}
@Override
public boolean isSingleton() {
return false;
}
@Override
public void afterPropertiesSet() throws Exception {
buildClient();
}
protected void buildClient() {
try {
preBuiltTransportClient = new PreBuiltTransportClient(settings());
String InetSocket[] = clusterNodes.split(":");
String address = InetSocket[0];
Integer port = Integer.valueOf(InetSocket[1]);
transportClient = preBuiltTransportClient.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(address), port));
} catch (UnknownHostException e) {
logger.error(e.getMessage());
}
}
/**
* 初始化默认的client
*/
private Settings settings() {
// Settings settings = Settings.builder().put("cluster.name", clusterName).put("client.transport.sniff", true).build();
Settings settings = Settings.builder().put("cluster.name", "elasticsearch").build();
return settings;
}
}5.27.5. RestController
package com.example.api.restful;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.client.transport.TransportClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/restful/search")
public class SearchRestController {
@Autowired
private TransportClient client;
@RequestMapping(value = "/client/{articleId}")
public GetResponse test(@PathVariable String articleId) {
GetResponse response = client.prepareGet("information", "article", articleId).get();
return response;
}
}使用 Curl 测试 restful 接口
MacBook-Pro:~ neo$ curl -k https://test:test@localhost:8443/restful/search/client/1093.json
{"fields":{},"id":"1093","type":"article","source":{"@timestamp":"2017-07-31T05:41:00.248Z","author":"test","@version":"1","description":"test","ctime":"2017-07-31T05:40:35.000Z","id":1093,"source":"test","title":"test11111","content":"<p>test</p><p>aaaaaaaaaaaaaa</p>"},"version":3,"index":"information","sourceAsBytes":"eyJAdGltZXN0YW1wIjoiMjAxNy0wNy0zMVQwNTo0MTowMC4yNDhaIiwiYXV0aG9yIjoidGVzdCIsIkB2ZXJzaW9uIjoiMSIsImRlc2NyaXB0aW9uIjoidGVzdCIsImN0aW1lIjoiMjAxNy0wNy0zMVQwNTo0MDozNS4wMDBaIiwiaWQiOjEwOTMsInNvdXJjZSI6InRlc3QiLCJ0aXRsZSI6InRlc3QxMTExMSIsImNvbnRlbnQiOiI8cD50ZXN0PC9wPjxwPmFhYWFhYWFhYWFhYWFhPC9wPiJ9","sourceInternal":{"childResources":[]},"sourceAsString":"{\"@timestamp\":\"2017-07-31T05:41:00.248Z\",\"author\":\"test\",\"@version\":\"1\",\"description\":\"test\",\"ctime\":\"2017-07-31T05:40:35.000Z\",\"id\":1093,\"source\":\"test\",\"title\":\"test11111\",\"content\":\"<p>test</p><p>aaaaaaaaaaaaaa</p>\"}","sourceEmpty":false,"sourceAsMap":{"@timestamp":"2017-07-31T05:41:00.248Z","author":"test","@version":"1","description":"test","ctime":"2017-07-31T05:40:35.000Z","id":1093,"source":"test","title":"test11111","content":"<p>test</p><p>aaaaaaaaaaaaaa</p>"},"exists":true,"sourceAsBytesRef":{"childResources":[]},"fragment":false}