Package bayou.od

A simple library for Service Locator pattern.

See: Description

Interface Summary

Interface	Description
OD.Binding	Binding of (type,tags)->supplier.
OD.Predicate<T>	Similar to Predicate in Java 8.
OD.Supplier<T>	Similar to Supplier in Java 8.

Class Summary

Class	Description
OD	A Service Locator library.
OD.BindingBuilder<T>	Builder for creating bindings.
OD.Local	Thread-local bindings.

Exception Summary

Exception	Description
OD.NotFoundException	Binding is not found for (type,tags).

Package bayou.od Description

A simple library for Service Locator pattern.

This library contains bind and lookup operations, based on (type,tags). For example

     OD.bind(Foo.class).to(foo);
     ...
     OD.get(Foo.class);  // lookup
 

There is a global binding list, which is totally ordered; multiple bindings may match a lookup, the latest binding has priority.

Each thread also contains a local binding list; local bindings are only visible to lookups in the same thread. Local bindings have priority over global bindings.

     OD.Local.bind(Foo.class).to(foo2);

     // later in the same thread
     OD.get(Foo.class); // sees `foo2`
 

Type in (type,tags) can be generic; see ClassType.

Tags in (type,tags) can be arbitrary objects, including `null`. For example

     OD.bind(Foo.class).tags("x", 1).to(x1);

     OD.get(Foo.class, "x", 1); // sees `x1`