Java Technical Notes

kafka

used for building real-time data pipelines and streaming apps. scalable/fault-tolerant/fast

ref: kafka

Redis

Active MQ/Kafka

Lucence/ Solr

FastDFS

MyBatis / Hibernate

HashMap history

1. linkedlist -> RBT
2. enhance hash algorithm in string

json

• how to parse json faster?
  • small memory footprint
  • stream API?