I have a requirement where I want to trigger an event based on some action, and this functionality is to be implemented as a jar file.
Lets explain this with an example.
There is a web application WAR_FILE.
There is a rest client named REST_CLIENT.
There is a jar file that has api methods for client REST_CLIENT named as MY_JAR.
Now WAR_FILE will be using MY_JAR to post data to REST_CLIENT.
But WAR_FILE does not want to wait for its response.Its like post data and do not care for response.
MY_JAR will take all inputs from WAR_FILE and store it in a queue as cache.I am using redis to maintain this queue as cache.
The main problem is MY_JAR has to check every time that if there is any request in that queue to act upon.
Sol 1: use quartz in MY_JAR to check after every n seconds,if there is any new request to act upon.
problem1 : The WAR_FILE may itself be using some quartz.
problem2 : If one thread is executing a list of tasks from queue and other thread comes and start executing the same request.
Sol 2: use cron job
problem : problem2 in sol 1
Sol 3 : RabitMQ / ActiveMQ (just heard of it)
problem : does not know how to use it and how it could be helping me.
Please help me.