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Why "Polyglot Programming" or "Do It Yourself Programming Languages" or "Language Oriented Programming" sucks?

Last year we saw the launch of a new Web programming language Dart - Structured Web Programming from Google. A very interesting approach to support web application development. Not so long after Go, Groovy, Ruby, Scala, << name your DSL here >> ; we see Dart. Is it a good thing to have at least one programming language to solve one problem? The answer is, like we already know, it depends. Some important backgrounds you should know about the multi programming language paradigm are following: 1. You can read Martin Fowler article about language oriented programming with language workbenches which enables you to write small programming languages easily. In this article I see everyone writing their small languages, everywhere. In this concept we see DSL (Domain Specific Language) as the future of our programming activities. Source: http://martinfowler.com/articles/languageWorkbench.html 2. Neal Ford talked about Polyglot Programming, combining multiple programming language

Software Development Macro and Micro Process

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Creating Spring Bean dynamically in the Runtime

In my training someone asked me whether it is possible to create an object (a Spring Bean) dynamically so you can choose which implementation you want to have  in the runtime . So at the compile time you don't know what object actually should be created yet. The application should decide what object to be created based on a property file . 1. We create an annotation so we can mark the method which should be able to create the object dynamically: ... package your.package; ... @Retention(RetentionPolicy.RUNTIME) public @interface InjectDynamicObject { } ... 2. Use the new created annotation in your method which should be able to create the object dynamically: ... @Named("customerBo") public class CustomerBoImpl implements CustomerBo { ...     @Override   @InjectDynamicObject   public Customer getDynamicCustomer() {         return this.dynamicCustomer; } ... 3. Write an aspect with Pointcut and Advise which change the ob