ElasticSearch DSL Script使用案例分享，涉及到的功能点：
- 脚本片段使用
- 多行文本使用
- 添加属性字段
1前言
先看看elasticsearch官方的script dsl块文本的写法：通过一对""" """来包含块文本
{
"query": {
"function_score": {
"script_score": {
"script": {
"lang": "painless",
"source": """
int total = 0;
for (int i = 0; i < doc['goals'].length; ++i) {
total += doc['goals'][i];
}
return total;
"""
}
}
}
}
}
对应的bboss script dsl块文本的写法：通过一对@""" """来包含块文本
{
"query": {
"function_score": {
"script_score": {
"script": {
"lang": "painless",
"source": @"""
int total = 0;
for (int i = 0; i < doc['goals'].length; ++i) {
total += doc['goals'][i];
}
return total;
"""
}
}
}
}
}
bboss中管理的dsl块文本和elasticsearch官方的dsl中的块文本唯一的区别就是在开头的"""前面加了个@符号
2.定义dsl配置
在demo.xml文件中增加以下配置
2.执行脚本处理
定义类ScriptImpl,增加方法updateDocumentByScriptPath来执行脚本
package org.bboss.elasticsearchtest.script;
/*
* Copyright 2008 biaoping.yin
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import org.bboss.elasticsearchtest.crud.DocumentCRUD;
import org.frameworkset.elasticsearch.ElasticSearchHelper;
import org.frameworkset.elasticsearch.client.ClientInterface;
import java.util.HashMap;
import java.util.Map;
public class ScriptImpl {
private String mappath = "esmapper/demo.xml";
public void updateDocumentByScriptPath(){
//初始化数据，会创建type为demo的indice demo，并添加docid为2的文档
DocumentCRUD documentCRUD = new DocumentCRUD();
documentCRUD.testCreateIndice();
documentCRUD.testBulkAddDocument();
//创建加载配置文件的客户端工具，用来检索文档，单实例多线程安全
ClientInterface clientUtil = ElasticSearchHelper.getConfigRestClientUtil(mappath);
Map params = new HashMap();
//为id为2的文档增加last和nick两个属性
params.put("last","gaudreau");
params.put("nick","hockey");
//通过script脚本为文档id为2的文档增加last和nick两个属性，为了演示效果强制refresh，实际环境慎用
clientUtil.updateByPath("demo/demo/2/_update?refresh","scriptDsl",params);
//获取更新后的文档，会看到新加的2个字段属性
String doc = clientUtil.getDocument("demo","demo","2");
System.out.println(doc);
}
}
3.一个比较复杂Script的案例
code], "dynamic_price_template.name":#[dynamicPriceTemplate->name], "dynamic_price_template.count_products":#[dynamicPriceTemplate->countProducts], "dynamic_price_template.is_deleted":#[dynamicPriceTemplate->isDeleted], "dynamic_price_template.user_id_update":#[dynamicPriceTemplate->userIdUpdate], "dynamic_price_template.rules": [ #foreach($rule in $dynamicPriceTemplate.rules) #if($velocityCount > 0),#end { "id": #[dynamicPriceTemplate->rules[$velocityCount].id], "sort_num": #[dynamicPriceTemplate->rules[$velocityCount]->sortNum], "act_expired_time_tick": #[dynamicPriceTemplate->rules[$velocityCount]->actExpiredTimeTick], "act_expired_time_value": #[dynamicPriceTemplate->rules[$velocityCount]->actExpiredTimeValue], "act_expired_time_unit": #[dynamicPriceTemplate->rules[$velocityCount]->actExpiredTimeUnit], "price_new_type": #[dynamicPriceTemplate->rules[$velocityCount]->priceNewType], "price_new_coefficient": #[dynamicPriceTemplate->rules[$velocityCount]->priceNewCoefficient], "price_new_custom": #[dynamicPriceTemplate->rules[$velocityCount]->priceNewCustom], "auto_set_commend": #[dynamicPriceTemplate->rules[$velocityCount].autoSetCommend], "auto_set_tag": #[dynamicPriceTemplate->rules[$velocityCount]->autoSetTag] } #end ] } } } ]]>
4 参考资料
https://my.oschina.net/bboss/blog/1556866#h3_37
https://www.elastic.co/guide/en/elasticsearch/painless/6.3/painless-examples.html
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