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README
GPL-2.0

启动说明

请点击参考

日志处理

SpringBoot2.0版本:https://gitee.com/52itstyle/spring-boot-elasticsearch/tree/spring-boot2-elasticsearch/

其实做这个Demo的目的是如何基于Elasticsearch构建网站日志处理系统,通过数据同步工具等一些列开源组件来快速构建一个日志处理系统,项目雏形初步成型中。

日志演示网址:http://es.52itstyle.vip (内存不存、演示暂停)

输入图片说明

区域演示网址:http://es.52itstyle.vip/area/index (内存不存、演示暂停)

输入图片说明

当然,项目功能会逐步增加,实现一个365°全方位的Demo案例。

输入图片说明

开发环境

JDK1.8、Maven、Eclipse、SpringBoot1.5.9、elasticsearch2.4.6、Dubbo2.6.2、zookeeper3.4.13、Redis、kafka、Vue、Iview

QQ群

  • JAVA爱好者④:JAVA爱好者

版本介绍

spring-boot-starter-parent-1.5.9.RELEASE、spring-data-elasticsearch-2.1.9.RELEAS、elasticsearch-2.4.6(5.0+以上需要依赖JDK8)

截止2018年1月22日,ElasticSearch目前最新的已到6.1.2,但是spring-boot的更新速度远远跟不上ElasticSearch更新的速度,目前spring-boot支持的最新版本是elasticsearch-2.4.6。

参考:https://github.com/spring-projects/spring-data-elasticsearch/wiki/Spring-Data-Elasticsearch---Spring-Boot---version-matrix

输入图片说明

接入方式

使用spring-boot中的spring-data-elasticsearch,可以使用两种内置客户端接入

1、节点客户端(node client): 配置文件中设置为local:false,节点客户端以无数据节点(node-master或node-client)身份加入集群,换言之,它自己不存储任何数据,但是它知道数据在集群中的具体位置,并且能够直接转发请求到对应的节点上。

2、传输客户端(Transport client): 配置文件中设置为local:true,这个更轻量的传输客户端能够发送请求到远程集群。它自己不加入集群,只是简单转发请求给集群中的节点。 两个Java客户端都通过9300端口与集群交互,使用Elasticsearch传输协议(Elasticsearch Transport Protocol)。集群中的节点之间也通过9300端口进行通信。如果此端口未开放,你的节点将不能组成集群。

服务说明

使用本地ElasticSearch服务(application-dev.properties)
spring.data.elasticsearch.cluster-name=elasticsearch
#默认就是本机,如果要使用远程服务器,或者局域网服务器,那就需要在这里配置ip:prot;可以配置多个,以逗号分隔,相当于集群。
#Java客户端:通过9300端口与集群进行交互
#其他所有程序语言:都可以使用RESTful API,通过9200端口的与Elasticsearch进行通信。
#spring.data.elasticsearch.cluster-nodes=192.168.1.180:9300
使用远程ElasticSearch服务(application-dev.properties)

项目结构

     
├─src
│  ├─main
│  │  ├─java
│  │  │  └─com
│  │  │      └─itstyle
│  │  │          └─es
│  │  │              │  Application.java
│  │  │              │  
│  │  │              ├─common
│  │  │              │  ├─constant
│  │  │              │  │      PageConstant.java
│  │  │              │  │      
│  │  │              │  └─interceptor
│  │  │              │          MyAdapter.java
│  │  │              │          
│  │  │              └─log
│  │  │                  ├─controller
│  │  │                  │      LogController.java
│  │  │                  │      
│  │  │                  ├─entity
│  │  │                  │      Pages.java
│  │  │                  │      SysLogs.java
│  │  │                  │      
│  │  │                  ├─repository
│  │  │                  │      ElasticLogRepository.java
│  │  │                  │      
│  │  │                  └─service
│  │  │                      │  LogService.java
│  │  │                      │  
│  │  │                      └─impl
│  │  │                              LogServiceImpl.java
│  │  │                              
│  │  ├─resources
│  │  │  │  application-dev.properties
│  │  │  │  application-prod.properties
│  │  │  │  application-test.properties
│  │  │  │  application.yml
│  │  │  │  
│  │  │  ├─static
│  │  │  │  ├─iview
│  │  │  │  │  │  iview.css
│  │  │  │  │  │  iview.min.js
│  │  │  │  │  │  
│  │  │  │  │  └─fonts
│  │  │  │  │          ionicons.eot
│  │  │  │  │          ionicons.svg
│  │  │  │  │          ionicons.ttf
│  │  │  │  │          ionicons.woff
│  │  │  │  │          
│  │  │  │  ├─jquery
│  │  │  │  │      jquery-3.2.1.min.js
│  │  │  │  │      
│  │  │  │  └─vue
│  │  │  │          vue.min.js
│  │  │  │          
│  │  │  └─templates
│  │  │      └─log
│  │  │              index.html
│  │  │              
│  │  └─webapp
│  │      │  index.jsp
│  │      │  
│  │      └─WEB-INF
│  │              web.xml
│  │              
│  └─test
│      └─java
│          └─com
│              └─itstyle
│                  └─es
│                      └─test
│                              Logs.java


项目演示

演示网址:http://es.52itstyle.com

项目截图

搜索页面

分页查询

使用ElasticsearchTemplate模板插入了20万条数据,本地向外网服务器(1核1G),用时60s+,一分钟左右的时间。虽然索引库容量有增加,但是等了大约 10分钟左右的时间才能搜索出来。

分页查询到10000+的时候系统报错,Result window is too large,修改config下的elasticsearch.yml 追加以下代码即可:

# 自行定义数量
index.max_result_window : '10000000'

参考:https://www.elastic.co/guide/en/elasticsearch/reference/current/index-modules.html

Java API

Elasticsearch为Java用户提供了两种内置客户端:

  • 节点客户端(node client):

节点客户端,顾名思义,其本身也是Elasticsearch集群的一个组成部分。以无数据节点(none data node)身份加入集群,换言之,它自己不存储任何数据,但是它知道数据在集群中的具体位置,并且能够直接转发请求到对应的节点上。

  • 传输客户端(Transport client):

这个更轻量的传输客户端能够发送请求到远程集群。它自己不加入集群,只是简单转发请求给集群中的节点。两个Java客户端都通过9300端口与集群交互,使用Elasticsearch传输协议(Elasticsearch Transport Protocol)。集群中的节点之间也通过9300端口进行通信。如果此端口未开放,你的节点将不能组成集群。

安装Elasticsearch-Head

elasticsearch-head是一个界面化的集群操作和管理工具,可以对集群进行傻瓜式操作。你可以通过插件把它集成到es(首选方式),也可以安装成一个独立webapp。

es-head主要有三个方面的操作:

  • 显示集群的拓扑,并且能够执行索引和节点级别操作
  • 搜索接口能够查询集群中原始json或表格格式的检索数据
  • 能够快速访问并显示集群的状态

插件安装方式、参考:https://github.com/mobz/elasticsearch-head

  • for Elasticsearch 5.x: site plugins are not supported. Run as a standalone server
  • for Elasticsearch 2.x: sudo elasticsearch/bin/plugin install mobz/elasticsearch-head
  • for Elasticsearch 1.x: sudo elasticsearch/bin/plugin -install mobz/elasticsearch-head/1.x
  • for Elasticsearch 0.x: sudo elasticsearch/bin/plugin -install mobz/elasticsearch-head/0.9

安装成功以后会在plugins目录下出现一个head目录,表明安装已经成功。

浏览截图:

Elasticsearch-Head

x-pack监控

Elasticsearch、Logstash 随着 Kibana 的命名升级直接从2.4跳跃到了5.0,5.x版本的 ELK 在版本对应上要求相对较高,不再支持5.x和2.x的混搭,同时 Elastic 做了一个 package ,对原本的 marvel、watch、alert 做了一个封装,形成了 x-pack 。

安装:https://www.elastic.co/guide/en/elasticsearch/reference/6.1/installing-xpack-es.html

用户管理

x-pack安装之后有一个超级用户elastic ,其默认的密码是changeme,拥有对所有索引和数据的控制权,可以使用该用户创建和修改其他用户,当然这里可以通过kibana的web界面进行用户和用户组的管理。

修改elastic用户的密码:

curl -XPUT -u elastic 'localhost:9200/_xpack/security/user/elastic/_password' -d '{
  "password" : "123456"
}'

IK Analysis for Elasticsearch

下载安装:

由于Elasticsearch版本是2.4.6,这里选择IK版本为1.10.6

wget https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v1.10.6/elasticsearch-analysis-ik-1.10.6.zip

下载解压以后在 Elasticsearch 的config下的elasticsearch.yml文件中,添加如下代码(2.0以上可以不设置)。

index:  
      analysis:                     
        analyzer:        
          ik:  
              alias: [ik_analyzer]  
              type: org.elasticsearch.index.analysis.IkAnalyzerProvider  
          ik_max_word:  
              type: ik  
              use_smart: false  
          ik_smart:  
              type: ik  
              use_smart: true

或者

index.analysis.analyzer.ik.type : “ik”

安装前:

http://192.168.1.180:9200/_analyze?analyzer=standard&pretty=true&text=我爱你中国
{
  "tokens" : [ {
    "token" : "我",
    "start_offset" : 0,
    "end_offset" : 1,
    "type" : "<IDEOGRAPHIC>",
    "position" : 0
  }, {
    "token" : "爱",
    "start_offset" : 1,
    "end_offset" : 2,
    "type" : "<IDEOGRAPHIC>",
    "position" : 1
  }, {
    "token" : "你",
    "start_offset" : 2,
    "end_offset" : 3,
    "type" : "<IDEOGRAPHIC>",
    "position" : 2
  }, {
    "token" : "中",
    "start_offset" : 3,
    "end_offset" : 4,
    "type" : "<IDEOGRAPHIC>",
    "position" : 3
  }, {
    "token" : "国",
    "start_offset" : 4,
    "end_offset" : 5,
    "type" : "<IDEOGRAPHIC>",
    "position" : 4
  } ]
}

安装后:

http://121.42.155.213:9200/_analyze?analyzer=ik&pretty=true&text=我爱你中国
{
  "tokens" : [ {
    "token" : "我爱你",
    "start_offset" : 0,
    "end_offset" : 3,
    "type" : "CN_WORD",
    "position" : 0
  }, {
    "token" : "爱你",
    "start_offset" : 1,
    "end_offset" : 3,
    "type" : "CN_WORD",
    "position" : 1
  }, {
    "token" : "中国",
    "start_offset" : 3,
    "end_offset" : 5,
    "type" : "CN_WORD",
    "position" : 2
  } ]
}

数据同步

使用第三方工具类库elasticsearch-jdbc实现MySql到elasticsearch的同步。

同步架构图

运行环境:

centos7.5、JDK8、elasticsearch-jdbc-2.3.2.0

安装步骤:

#!/bin/sh
# elasticsearch-jdbc 安装路径
bin=/home/elasticsearch-jdbc-2.3.2.0/bin
lib=/home/elasticsearch-jdbc-2.3.2.0/lib
echo '{
    "type" : "jdbc",
    "jdbc": {
        # 如果数据库中存在Json文件 这里设置成false,否则会同步出错
        "detect_json":false,
        "url":"jdbc:mysql://127.0.0.1:3306/itstyle_log??useUnicode=true&characterEncoding=utf-8&useSSL=false&allowMultiQueries=true",
        "user":"root",
        "password":"root",
        # 如果想自动生成_id,去掉第一个获取字段即可;如果想Id作为主键,把id设置为_id即可
        "sql":"SELECT id AS _id,id,user_id AS userId ,username,operation,time,method,params,ip,device_type AS deviceType,log_type AS logType,exception_detail AS exceptionDetail,
gmt_create AS gmtCreate,plat_from AS platFrom FROM sys_log",
        "elasticsearch" : {
             "host" : "127.0.0.1",#elasticsearch服务地址
             "port" : "9300" #远程elasticsearch服务 此端口一定要开放
        },
        "index" : "elasticsearch",# 索引名相当于库
        "type" : "sysLog" # 类型名相当于表
    }
}' | java \
       -cp "${lib}/*" \
       -Dlog4j.configurationFile=${bin}/log4j2.xml \
       org.xbib.tools.Runner \
       org.xbib.tools.JDBCImporter
  • 这里是列表文本第四部:授权并执行
chmod +x mysql_import_es.sh
./mysql_import_es.sh

ElasticSearchRepository和ElasticSearchTemplate

Spring-data-elasticsearch是Spring提供的操作ElasticSearch的数据层,封装了大量的基础操作,通过它可以很方便的操作ElasticSearch的数据。

ElasticSearchRepository的基本使用

/**
 * @param <T>
 * @param <ID>
 * @author Rizwan Idrees
 * @author Mohsin Husen
 */
@NoRepositoryBean
public interface ElasticsearchRepository<T, ID extends Serializable> extends ElasticsearchCrudRepository<T, ID> {

	<S extends T> S index(S entity);

	Iterable<T> search(QueryBuilder query);

	Page<T> search(QueryBuilder query, Pageable pageable);

	Page<T> search(SearchQuery searchQuery);

	Page<T> searchSimilar(T entity, String[] fields, Pageable pageable);

	void refresh();

	Class<T> getEntityClass();
}

ElasticsearchRepository里面有几个特殊的search方法,这些是ES特有的,和普通的JPA区别的地方,用来构建一些ES查询的。 主要是看QueryBuilder和SearchQuery两个参数,要完成一些特殊查询就主要看构建这两个参数。

输入图片说明

一般情况下,我们不是直接是new NativeSearchQuery,而是使用NativeSearchQueryBuilder。 通过NativeSearchQueryBuilder.withQuery(QueryBuilder1).withFilter(QueryBuilder2).withSort(SortBuilder1).withXXXX().build();这样的方式来完成NativeSearchQuery的构建。

输入图片说明 输入图片说明

ElasticSearchTemplate的使用

ElasticSearchTemplate更多是对ESRepository的补充,里面提供了一些更底层的方法。

这里我们主要实现快读批量插入的功能,插入20万条数据,本地向外网服务器(1核1G),用时60s+,一分钟左右的时间。虽然索引库容量有增加,但是等了大约10分钟左右的时间才能搜索出来。

//批量同步或者插入数据
public void bulkIndex(List<SysLogs> logList) {  
	long start = System.currentTimeMillis();
    int counter = 0;  
    try {  
        List<IndexQuery> queries = new ArrayList<>();  
        for (SysLogs log : logList) {  
            IndexQuery indexQuery = new IndexQuery();  
            indexQuery.setId(log.getId()+ "");  
            indexQuery.setObject(log);  
            indexQuery.setIndexName("elasticsearch");  
            indexQuery.setType("sysLog");  
            //也可以使用IndexQueryBuilder来构建  
            //IndexQuery index = new IndexQueryBuilder().withId(person.getId() + "").withObject(person).build();  
            queries.add(indexQuery);  
            if (counter % 1000 == 0) {  
            	elasticSearchTemplate.bulkIndex(queries);  
                queries.clear();  
                System.out.println("bulkIndex counter : " + counter);  
            }  
            counter++;  
        }  
        if (queries.size() > 0) {  
        	elasticSearchTemplate.bulkIndex(queries);  
        }
        long end = System.currentTimeMillis();
        System.out.println("bulkIndex completed use time:"+ (end-start));  
        
    } catch (Exception e) {  
        System.out.println("IndexerService.bulkIndex e;" + e.getMessage());  
        throw e;  
    }  
} 

Redis日志队列

见包:com.itstyle.es.common.redis

监听配置 RedisListener:

@Component
public class RedisListener {
    private static final Logger LOGGER = LoggerFactory.getLogger(RedisListener.class);
	@Bean
	RedisMessageListenerContainer container(
			RedisConnectionFactory connectionFactory,
			MessageListenerAdapter listenerAdapter) {
		LOGGER.info("启动监听"); 
		RedisMessageListenerContainer container = new RedisMessageListenerContainer();
		container.setConnectionFactory(connectionFactory);
		container.addMessageListener(listenerAdapter, new PatternTopic("itstyle_log"));
		return container;
	}

	@Bean
	MessageListenerAdapter listenerAdapter(Receiver receiver) {
		return new MessageListenerAdapter(receiver, "receiveMessage");
	}

	@Bean
	Receiver receiver(CountDownLatch latch) {
		return new Receiver(latch);
	}

	@Bean
	CountDownLatch latch() {
		return new CountDownLatch(1);
	}

	@Bean
	StringRedisTemplate template(RedisConnectionFactory connectionFactory) {
		return new StringRedisTemplate(connectionFactory);
	}
}

日志接收Receiver:

public class Receiver {
    private static final Logger LOGGER = LoggerFactory.getLogger(Receiver.class);
    @Autowired
	private  ElasticLogRepository elasticLogRepository;
    private CountDownLatch latch;

    @Autowired
    public Receiver(CountDownLatch latch) {
        this.latch = latch;
    }

    public void receiveMessage(String message) {
        LOGGER.info("接收log消息 <{}>",message);
        if(message == null){
            LOGGER.info("接收log消息 <" + null + ">");
        }else {
        	ObjectMapper mapper = new ObjectMapper();  
			try {
				SysLogs log = mapper.readValue(message, SysLogs.class);
				elasticLogRepository.save(log);
				LOGGER.info("接收log消息内容 <{}>",log.getOperation());
			} catch (JsonParseException e) {
				e.printStackTrace();
			} catch (JsonMappingException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			} catch (Exception e) {
				e.printStackTrace();
			}
        }
        latch.countDown();
    }
}

测试 LogController:http://lip:port/redisLog

Kafka日志队列

见包: com.itstyle.es.common.kafka

推荐阅读

JavaWeb项目架构之Elasticsearch日志处理系统

JavaWeb项目架构之Redis分布式日志队列

JavaWeb项目架构之Kafka分布式日志队列

作者: 小柒2012

欢迎关注: https://blog.52itstyle.vip

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(Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an offer, in accord with Subsection b above.) The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the executable. However, as a special exception, the source code distributed need not include anything that is normally distributed (in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself accompanies the executable. If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code. 4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance. 5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program. If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances. It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices. Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice. This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. 8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. {description} Copyright (C) 2018 小柒2012 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. {signature of Ty Coon}, 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License.

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ES全文搜索引擎,基于Elasticsearch构建网站日志处理系统,通过数据同步工具等一些列开源组件来快速构建一个日志处理系统,项目雏形初步成型中。 expand collapse
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