Read the docs: https://flightstats.github.io/hub/

What is the Hub?

The hub is a distributed linked list.
The hub is a messaging system.
The hub is a long term data store.

The hub is like a Key Value Store

Stores each item at a unique key (url) (http://hub/channel/whatIs/2016/12/31/23/59/59/bhJ23I)
Items are available for an arbitrarily long time
Fault tolerant, easy to cluster
Requires a quorum for a successful write

with some differences

Most KV stores allow mutations. The hub does not.
The hub imposes that all item keys always move forward in time
The hub offers ordering guarantees to provide consistent answers to time based queries

The hub is like a Messaging system

Items are immutable
Item keys always increase

and some differences

Most messaging systems do not let you access arbitrarily old items
Many messaging systems are difficult to cluster
Many messaging system require custom clients

How to build hub:

Run ./gradlew build

The above command compiles the code, runs the unit tests and integration tests.~~~~

How to run System tests:

From Local:

Setup hub: a) ./localDocker.sh (from root directory) b) docker run -p 80:80 hub:local
set base.url property in integration-hub.properties
Go to root of hub project source and run below command ./gradlew systemTest -i