Spring Boot与Kotlin 整合全文搜索引擎Elasticsearch

dependencies {
    compile "org.elasticsearch:elasticsearch:$elasticsearch_version"
    compile "org.elasticsearch.client:transport:$elasticsearch_version"
}

group 'name.quanke.kotlin'
version '1.0-SNAPSHOT'

buildscript {
    ext.kotlin_version = '1.2.10'
    ext.spring_boot_version = '1.5.4.RELEASE'
    ext.springfox_swagger2_version = '2.7.0'
    ext.mysql_version = '5.1.21'
    ext.mybatis_version = '1.1.1'
    ext.elasticsearch_version = '5.5.1'
    ext.fastjson_version = '1.2.7'
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath("org.springframework.boot:spring-boot-gradle-plugin:$spring_boot_version")

//        Kotlin整合SpringBoot的默认无参构造函数，默认把所有的类设置open类插件
        classpath("org.jetbrains.kotlin:kotlin-noarg:$kotlin_version")
        classpath("org.jetbrains.kotlin:kotlin-allopen:$kotlin_version")
    }
}

apply plugin: 'kotlin'
apply plugin: "kotlin-spring" // See https://kotlinlang.org/docs/reference/compiler-plugins.html#kotlin-spring-compiler-plugin
apply plugin: 'org.springframework.boot'
apply plugin: "kotlin-jpa"  //https://stackoverflow.com/questions/32038177/kotlin-with-jpa-default-constructor-hell
jar {
    baseName = 'chapter11-6-8-service'
    version = '0.1.0'
}
repositories {
    mavenCentral()
}


dependencies {
    compile "org.jetbrains.kotlin:kotlin-stdlib-jre8:$kotlin_version"
    compile("org.jetbrains.kotlin:kotlin-reflect:${kotlin_version}")

    compile "org.springframework.boot:spring-boot-starter-web:$spring_boot_version"
    compile "org.elasticsearch:elasticsearch:$elasticsearch_version"
    compile "org.elasticsearch.client:transport:$elasticsearch_version"
    compile "com.alibaba:fastjson:$fastjson_version"
    compile "org.apache.commons:commons-lang3:3.6"


    testCompile "org.springframework.boot:spring-boot-starter-test:$spring_boot_version"
    testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"

}

compileKotlin {
    kotlinOptions.jvmTarget = "1.8"
}
compileTestKotlin {
    kotlinOptions.jvmTarget = "1.8"
}

import com.alibaba.fastjson.JSON
import com.alibaba.fastjson.serializer.SerializerFeature
import org.elasticsearch.action.search.SearchResponse
import org.elasticsearch.client.transport.TransportClient
import org.elasticsearch.common.settings.Settings
import org.elasticsearch.common.transport.InetSocketTransportAddress
import org.elasticsearch.transport.client.PreBuiltTransportClient
import org.junit.After
import org.junit.Before

import java.net.InetAddress

/**
 * Elasticsearch 5.5.1 的client 和 ElasticsearchTemplate的初始化
 * 作为一个外部访问者，请求ES的集群，对于集群而言，它是一个外部因素。
 * Created by http://quanke.name on 2017/11/10.
 */
open class ElasticsearchClient {

    protected var client: TransportClient? = null

    @Before
    @Throws(Exception::class)
    fun setUp() {

        val esSettings = Settings.builder()
                .put("cluster.name", "utan-es") //设置ES实例的名称
                .put("client.transport.sniff", true) //自动嗅探整个集群的状态，把集群中其他ES节点的ip添加到本地的客户端列表中
                .build()

        /**
         * 这里的连接方式指的是没有安装x-pack插件,如果安装了x-pack则参考 [ElasticsearchXPackClient]
         * 1. java客户端的方式是以tcp协议在9300端口上进行通信
         * 2. http客户端的方式是以http协议在9200端口上进行通信
         */
        client = PreBuiltTransportClient(esSettings)
                .addTransportAddress(InetSocketTransportAddress(InetAddress.getByName("192.168.1.10"), 9300))

        println("ElasticsearchClient 连接成功")
    }

    @After
    @Throws(Exception::class)
    fun tearDown() {
        if (client != null) {
            client!!.close()
        }

    }

    protected fun println(searchResponse: SearchResponse) {
        val searchHits = searchResponse.hits.hits
        for (searchHit in searchHits) {
            println(JSON.toJSONString(searchHit.source, SerializerFeature.PrettyFormat))
        }
    }

}

import org.elasticsearch.index.query.QueryBuilders.matchAllQuery
import org.junit.Test
import org.junit.runner.RunWith
import org.springframework.boot.test.context.SpringBootTest
import org.springframework.test.context.junit4.SpringRunner


/**
 * Created by http://quanke.name on 2018/1/9.
 */
@RunWith(SpringRunner::class)
@SpringBootTest
class ApplicationTests : ElasticsearchClient() {

    @Test
    fun `es  test"`() {

        val qb = matchAllQuery()

        val response = client!!.prepareSearch("twitter")//可以是多个index
                .setTypes("tweet")//可以是多个类型
                .setQuery(qb)    // Query 查询条件
                .get()

        println(response)

    }

}