title: How to Synchronize object between multiple instance of Node Js application
body: <p>Is there any to lock any object in Node JS application.</p>
  
  <p>Is there are multiple instance for application is available some function shouldnt run concurrent. If instance A function is completed, it should unlock that object/key or some identifier and B instance of application should check if its unlock it should run some function.</p>
  
  <p>Any Object or Key can be used for identifying the locking and unlocking the function.</p>
  
  <p>How to do that in NodeJS application which have multiple instances. </p>