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LindenDemo.md

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Get started

  • git clone https://github.com/XiaoMi/linden.git
  • cd to root directory of linden source code
  • $ mvn clean package -DskipTests
  • $ sh ./bin/start-zk-server.sh & or run > .\bin\start-zk-server.cmd in windows OS
  • $ sh ./bin/start-linden-server.sh demo/cars/conf/ or run > .\bin\start-linden-server.cmd  demo/cars/conf/ in windows OS
  • Play the demo at http://localhost:10000

Demo config

http://localhost:10000/#/config/ displays this demo configuration

  • Runtime Status Runtime Status

  • Linden Properties (from demo/cars/conf/properties) Linden Properties

  • Linden Schema Linden Schema

This demo index is from demo/cars/data/cars.json. There is 15000 cars data in JSON format in this file, for example

{
    "id":0,
    "groupid":"0",
    "tags":"hybrid,leather,moon-roof,reliable",
    "category":"compact",
    "mileage":14900,
    "price":7500,
    "contents":"yellow compact hybrid leather moon-roof reliable u.s.a. florida tampa asian acura 1.6el ",
    "color":"yellow",
    "year":1994,
    "makemodel":"asian/acura/1.6el",
    "city":"u.s.a./florida/tampa"
}
  • Linden schema must contain an ID field, this field is string type, ID field in document stores a unique string to indicate the identification of this document. In this demo ID field name is “id”
  • groupid and category are string type fields
  • tags and contents are string type fields but tokenized
  • mileage and price are long type fields which store a long type value
  • color, year, makemodel and city are facet type fields which can be used in facet search. See http://lucene.apache.org/core/4_0_0/facet/org/apache/lucene/facet/doc-files/userguide.html

Play the Demo

Play the demo in http://localhost:10000/#/search/ Here are some sample BQL queries you can try:

select * from linden source
select * from linden by query is "tags:electric" source explain
select * from linden by query is "tags:electric" where color='green' and price < 5000 source
select * from linden browse by color(3) source
select * from linden where price > 15000 browse by makemodel(5, 'asian') source
select * from linden browse by makemodel(5, 'european/audi') source
select * from linden browse by color(3) drill down makemodel('european/audi')  source
select * from linden browse by color(3), makemodel drill sideways makemodel('european/audi')  source
select * from linden where category='luxury' aggregate by price({*, 5000}, [5000, 10000}, [10000, 15000}, [15000, *}) source
select * from linden where category='compact' aggregate by price({*, 5000}, [5000, 10000}, [10000, 15000}, [15000, *}) source