title: Caching a Map variable and accessing it across four tomcat servers (java)
body: <p>I have a case where I need to frequently update and retrieve values of a map. This variable should have the same keys and values throughout all four servers. If one server updates the Map, it should be reflective in the other servers.</p>
  
  <p>I believe I should be caching this..</p>
  
  <p>Can I have some example codes in how I should be achieving this ?</p>
  
  <p>Thank you.</p>