Creating and Using Thread-Scoped Variables

Creating and Using Thread-Scoped Variables

Sometimes you need variables scoped by thread so that each thread has an independent copy. There’s an easy way to create and manage such variables.

The java.lang.ThreadLocal class provides a wrapper around an object that’s guaranteed to be independent in each accessing thread. To create a ThreadLocal object, implement the initialValue() method to create and initialize the object you want to maintain. For example:

 ThreadLocal threadVar = newadLocal(){     protected Object initialValue(){       return new MyObject(); //do any default initialization here    } };

The threadVar variable that’s created is then accessible as any other variable; you can declare it to be static, give it an access restriction like private or public, etc. To retrieve the maintained object, just call the get() method on the ThreadLocal instance (the class cast is optional):

 MyObject myObject = (MyObject) threadVar.get();

The myObject object, when retrieved this way, is independent in each thread that runs this code and initialized to its default value as set in the initialValue() method. When using this technique, you can avoid having to synchronize the encapsulated object and utilize truly “thread-safe” variables in your applications.

Share the Post:
Heading photo, Metadata.

What is Metadata?

What is metadata? Well, It’s an odd concept to wrap your head around. Metadata is essentially the secondary layer of data that tracks details about the “regular” data. The regular

XDR solutions

The Benefits of Using XDR Solutions

Cybercriminals constantly adapt their strategies, developing newer, more powerful, and intelligent ways to attack your network. Since security professionals must innovate as well, more conventional endpoint detection solutions have evolved

AI is revolutionizing fraud detection

How AI is Revolutionizing Fraud Detection

Artificial intelligence – commonly known as AI – means a form of technology with multiple uses. As a result, it has become extremely valuable to a number of businesses across

AI innovation

Companies Leading AI Innovation in 2023

Artificial intelligence (AI) has been transforming industries and revolutionizing business operations. AI’s potential to enhance efficiency and productivity has become crucial to many businesses. As we move into 2023, several

data fivetran pricing

Fivetran Pricing Explained

One of the biggest trends of the 21st century is the massive surge in analytics. Analytics is the process of utilizing data to drive future decision-making. With so much of

kubernetes logging

Kubernetes Logging: What You Need to Know

Kubernetes from Google is one of the most popular open-source and free container management solutions made to make managing and deploying applications easier. It has a solid architecture that makes