Locking resources

The great thing about locking in the annotations framework is ... you don't do anything!! Thats right, you dont need to implement or annotate anything.

But there's a couple of things you need to be aware of...

Must provide a UniqueId

Milton's transparent locking mechanism relies on each resource having a persistent and reliable uniqueID to key locks on. You can do this by having an ID bean property on your domain object:

public Long getId() {
  return id;

Or you can annotate a method on the controller:

public String getProductCode(Product product) {
  return product.getProductCode();


Be Aware of Clustering

Milton's locking implementation uses an in-memory cache of lock tokens. If you deploy to a cluster you need to ensure this is replicated among your servers. At the time of writing milton doesnt have a built-in clustering solution, but one will be ready shortly. Please get in touch if you need help.

Next Article:

Creating collections