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Some of the tools you use in building applications also apply as you build out your services. The Single Responsibility Principle (SRP), for example, makes as much sense at the service level as it ...

The Observable design pattern is used in many important Java APIs. One well-known example is a JButton that uses the ActionListener API to execute an action. In this example, we have an ActionListener ...

The iterator design pattern is a commonly used pattern that provides a very useful abstraction. The iterator pattern is used to access and traverse the elements of a collection without the need to ...