如何在Java版本6.5.1中使用Elastic Search
[英]How to Use Elastic Search with Java version 6.5.1
问题描述
我需要的
- 我需要构建Crud Insert Update从Mysql删除和获取数据。
我看过Elastic search的文档
https://www.elastic.co/guide/en/elasticsearch/reference/current/search-search.html
我确实在Postman Rest客户端中尝试了一些示例。
我找到了链接
https://www.javacodegeeks.com/2018/03/elasticsearch-tutorial-beginners.html
适用于Elastic 6.2.1
作为6.5.1 Pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>6.5.1</version>
<dependencies>
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch-core</artifactId>
<version>6.5.1</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-high-level-client</artifactId>
<version>6.5.1</version>
</dependency>
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch-secure-sm</artifactId>
<version>6.5.1</version>
<scope>compile</scope>
</dependency>
Application.java
package com.javacodegeeks.example;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.http.HttpHost;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.action.delete.DeleteRequest;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.action.update.UpdateResponse;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.client.*;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
public class Application {
//The config parameters for the connection
private static final String HOST = "localhost";
private static final int PORT_ONE = 9200;
private static final int PORT_TWO = 9201;
private static final String SCHEME = "http";
private static RestHighLevelClient restHighLevelClient;
private static ObjectMapper objectMapper = new ObjectMapper();
private static final String INDEX = "persondata";
private static final String TYPE = "person";
/**
* Implemented Singleton pattern here
* so that there is just one connection at a time.
* @return RestHighLevelClient
*/
private static synchronized RestHighLevelClient makeConnection() {
if (restHighLevelClient == null) {
/*restHighLevelClient client = new RestHighLevelClient(
RestClient.builder(
new HttpHost("localhost", 9200, "http"),
new HttpHost("localhost", 9201, "http")));
*/
restHighLevelClient = new RestHighLevelClient(
RestClient.builder(
new HttpHost(HOST, PORT_ONE, SCHEME),
new HttpHost(HOST, PORT_TWO, SCHEME)));
}
return restHighLevelClient;
}
private static synchronized void closeConnection() throws IOException {
restHighLevelClient.close();
restHighLevelClient = null;
}
private static Person insertPerson(Person person) {
person.setPersonId(UUID.randomUUID().toString());
Map < String, Object > dataMap = new HashMap < String, Object > ();
dataMap.put("personId", person.getPersonId());
dataMap.put("name", person.getName());
IndexRequest indexRequest = new IndexRequest(INDEX, TYPE, person.getPersonId())
.source(dataMap);
try {
IndexResponse response = restHighLevelClient.index(indexRequest);
} catch (ElasticsearchException e) {
e.getDetailedMessage();
} catch (java.io.IOException ex) {
ex.getLocalizedMessage();
}
return person;
}
private static Person getPersonById(String id) {
GetRequest getPersonRequest = new GetRequest(INDEX, TYPE, id);
GetResponse getResponse = null;
try {
getResponse = restHighLevelClient.get(getPersonRequest);
} catch (java.io.IOException e) {
e.getLocalizedMessage();
}
return getResponse != null ?
objectMapper.convertValue(getResponse.getSourceAsMap(), Person.class) : null;
}
private static Person updatePersonById(String id, Person person) {
UpdateRequest updateRequest = new UpdateRequest(INDEX, TYPE, id)
.fetchSource(true); // Fetch Object after its update
try {
String personJson = objectMapper.writeValueAsString(person);
updateRequest.doc(personJson, XContentType.JSON);
UpdateResponse updateResponse = restHighLevelClient.update(updateRequest);
return objectMapper.convertValue(updateResponse.getGetResult().sourceAsMap(), Person.class);
} catch (JsonProcessingException e) {
e.getMessage();
} catch (java.io.IOException e) {
e.getLocalizedMessage();
}
System.out.println("Unable to update person");
return null;
}
private static void deletePersonById(String id) {
DeleteRequest deleteRequest = new DeleteRequest(INDEX, TYPE, id);
try {
DeleteResponse deleteResponse = restHighLevelClient.delete(deleteRequest);
} catch (java.io.IOException e) {
e.getLocalizedMessage();
}
}
public static void main(String[] args) throws IOException {
makeConnection();
System.out.println("Inserting a new Person with name testst...");
Person person = new Person();
person.setName("Testttt");
person = insertPerson(person);
System.out.println("Person inserted --> " + person);
System.out.println("Changing name to testst...");
person.setName("testst");
updatePersonById(person.getPersonId(), person);
System.out.println("Person updated --> " + person);
System.out.println("Getting testst...");
Person personFromDB = getPersonById(person.getPersonId());
System.out.println("Person from DB --> " + personFromDB);
System.out.println("Deleting teststss...");
deletePersonById(personFromDB.getPersonId());
System.out.println("Person Deleted");
closeConnection();
}
}
Person.java
package com.javacodegeeks.example;
public class Person {
private String personId;
private String name;
public String getPersonId() {
return personId;
}
public void setPersonId(String personId) {
this.personId = personId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return String.format("Person{personId='%s', name='%s'}", personId, name);
}
}
任何人都可以建议使用6.5版本指导示例示例的任何教程。
杰森输出
{
name: "MIT22",
cluster_name: "elasticsearch",
cluster_uuid: "KMJcFFe9ST6H7bbir3OPzQ",
version: {
number: "6.5.1",
build_flavor: "default",
build_type: "zip",
build_hash: "8c58350",
build_date: "2018-11-16T02:22:42.182257Z",
build_snapshot: false,
lucene_version: "7.5.0",
minimum_wire_compatibility_version: "5.6.0",
minimum_index_compatibility_version: "5.0.0"
},
tagline: "You Know, for Search"
}
Refrence
https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/transport-client.html
https://www.elastic.co/blog/logstash-jdbc-input-plugin
https://github.com/jprante/elasticsearch-jdbc#quick-links
谢谢
1 个解决方案
解决方案1
0 2018-11-23 12:47:09
Java.lang.IllegalStateException：jar地狱！ 在Elastic 6.5.1中
[英]Java.lang.IllegalStateException: jar hell! in Elastic 6.5.1
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