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Optional Parameters in Java 8 Lambda Expressions

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Optional Parameters in Java 8 Lambda Expressions

· Java Zone ·
Free Resource

How do you break a Monolith into Microservices at Scale? This ebook shows strategies and techniques for building scalable and resilient microservices.

Yeah, they don't really exist, but we can use polymorphism, method overloading and default methods instead to make it a bit more convenient to use our APIs.

As an example, here's an event bus implementation where I can register event handlers with an optional header parameter.

  Bus bus = new Bus();
  bus.register(event -> System.out.println("I gots an event"));
  bus.register((event,header) -> System.out.println("I gots an event w/ header"));

Here are the dirty details on how you can do this (and - when dispatching - events, use default methods to avoid type coercion.

How do you break a Monolith into Microservices at Scale? This ebook shows strategies and techniques for building scalable and resilient microservices.

Topics:
java8 ,lambda

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