Java Modifiers
#Java
What is Gp,LP,PE
(copied from https://www.financialpoise.com/accreditedinvestormarkets/90-second-lesson-what-is-a-gp-lp-and-sponsor/) Many articles about...
ElasticSearch Queries
GET /event/event_data/_search { "query": { "bool": { "must": { "match":{ "deviceId" : { "query" : "dell", "type" : "boolean" } } } } },...
When should we use PUT and when should we use POST?
(Copied from http://restcookbook.com/HTTP%20Methods/put-vs-post/) The HTTP methods POST and PUT aren't the HTTP equivalent of the CRUD's...
Java Generic
It's important to note that List<Object> and List<?> are not the same. You can insert an Object, or any subtype of Object, into a...
ElasticSearch 2.1 changes
1. no more filter 2. does not support delete by query
Spring Boot External Configuration
Copied from (http://altfatterz.blogspot.com/2014/10/software-configuration-with-spring-boot.html) Software configuration with Spring Boot...
Storm VS Shark
Following texts copied from http://stackoverflow.com/questions/24119897/apache-spark-vs-apache-storm Apache Spark is an in-memory...
ElasticSearch Data Backup and Restore
PUT http://source_server:9200/_snapshot/es21 { "type": "fs", "settings": { "compress": "true", "location": "/tmp/bak_es21" } }...
ElasticSearch String Datatype
Parameters for string fieldsedit The following parameters are accepted by string fields: fielddata Can the field use in-memory fielddata...