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Introduction
Both firms and employees had a tough year in the past. Software development, however, wasn't as significantly impacted and is still booming. While technology advances, Java programming is also undergoing a substantial change.
The potential of Java developers has been placed in doubt by the introduction of new ideas and technology. Java usage is a worry for peers, from wearable applications to AI solutions. We'll discuss Java developers and extending Play in this blog.
Java Developers-Extending Play
Any dependency injection framework can be used to create a module. To ensure that your extension can function without the help of dependency injection, you must stay away from dependencies on specific frameworks when you want to extend Play. Previously, Play used the Play.Plugin system to accomplish this, however, in version 2.5.x, Play modules have taken the role of Plugins.
A class that extends Play.inject is known as a play module.
The modules can be registered with Play without explicitly relying on a specific dependency injection mechanism. Everyone can use Play modules as a result.
In the module directory, a list of Play modules is given.
Additionally, as Play employs Play modules for built-in functionality, built-in functionality must be replaced or improved upon using a Play module.
Creating and Migrating Play Modules
Creating a Play module is simple:
public class MyApi {}
public class MyModule extends play.inject.Module {
public List<Binding<?>> bindings(Environment environment, Config config) {
return Collections.singletonList(bindClass(MyApi.class).toSelf());
}
}
You can also try this code with Online Java Compiler
Any class named module defined in the root package (the "app" directory) or specifically defined inside the reference.conf or the application.conf will be loaded by default by Play:
play.modules.enabled += "modules.MyModule"
Application Lifecycle
By injecting the Play.inject.ApplicationLifecycle interface and a shutdown hook into the singleton instance, a module can track when Play shuts down.
Testing Play Modules
Through the use of the GuiceApplicationBuilder and the addition of a binding to the module, Play Modules may be tested using the built-in test capability of Play.
Application application = new GuiceApplicationBuilder().bindings(new MyModule()).build();
Listing Existing Play Modules
A list of all Play modules available in an application will be shown using the Modules.locate(env, conf) method. There isn't a comparable Java class.
Overriding Built-In Modules
In some circumstances, a built-in module provided by Play needs to be overridden.
For instance, AhcWSClientProvider supports the WSClient interface, which implements WSClient functionality. You can bind a substitute class, MyWSClient, which extends WSClient, with:
public class MyWSModule extends play.inject.Module {
public List<Binding<?>> bindings(Environment environment, Config config) {
return Collections.singletonList(
bindClass(WSClient.class).toProvider(MyWSClientProvider.class));
}
}
You can also try this code with Online Java Compiler
When uploading a Play module, you shouldn't disable any existing modules in reference.conf because doing so can have unintended effects.
Frequently Asked Questions
Is Java still in demand in 2021?
Java has been around for 26 years, and it's still doing well. Programmers who are familiar with it are still in great demand. Since more than 90% of Fortune 500 organizations still use Java for their development projects, they will be for a very long time. Over 8 million Java developers work worldwide.
Will Java developers still be in-demand in future?
The need for Java developers continues to be very high year after year. According to a recent analysis by the analytical firm Burning Glass, Java Developer is one of the most popular IT jobs in the U.S. In February 2020, around 4,000 available positions will be open in the U.S. alone.
What are the responsibilities of a Java developer?
A Java Developer is in charge of the planning, creating, and administering Java-based programs. The daily roles vary significantly due to the widespread use of Java, particularly by large enterprises, but might include owning a specific application or working on several at once.
Should I still use Java in 2022?
Yes is the basic answer. Java is being used more and more frequently as a language as society shifts toward mobile apps and convenience. In the past two years, recruiters placed it as the third most popular language, making it one of the most vital languages we have seen.
Is Java losing popularity?
Some data from the TIOBE Index, which offers a monthly update of the most widely used programming languages worldwide, reveals that Java is lagging behind other prevalent languages. The most recent message from the group is that "Java was still number 1 on the TIOBE Index in April 2020."
Conclusion
Finally, you have reached the article's conclusion. Congratulations!! You gained knowledge of the Java developers-Extending Play in this blog. You now have mastery over Java developers-Extending Play
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