Sergei Chernov on JAVAPRO International

Optimizing Spring Integration Tests at Scale

Wed, 17 Dec 2025 07:00:02 +0000

1. Introduction

Sprint Boot is a popular Java framework that provides a rich platform for integration testing. It’s pretty convenient and flexible; however, at a large scale, when the project has hundreds or even thousands of integration tests using lots of heavy components (like TestContainers-managed beans), there can be performance and other issues. There are many hidden details that make much sense when the codebase becomes bigger and the configuration becomes more complicated. In this article, we’ll look at how the framework works under the hood, why it can be slow and inefficient, and how to boost the performance.

Fluent setter: breaking the convention

Wed, 01 Oct 2025 07:00:02 +0000

What if we implement a fluent Interface, whereby the setter method returns this instead of void?

CODE

public class SimplePojo {
 private String value;

 public String getValue() {
 return value;
 }

 public SimplePojo setValue(String value) {
 this.value = value;
 return this;
 }

 // equals, hashCode, toString
}

Now, let’s rewrite a standard piece of code using a fluent interface:

CODE

private static AssignmentGroupedActivitiesResource create() {
 return new AssignmentGroupedActivitiesResource()
 .setGrouping(new UserActivitiesGroupingResource()
 .setAlignmentScore(1)
 .setFocusScore(0)
 .setAdvancedGroups(List.of(
 new ProductivityGroupResource()
 .setSectionName("Development")
 .setColor("#2196f3")
 .setSpentTime(5L),
 new ProductivityGroupResource()
 .setSectionName("Chat")
 .setColor("#E502FA")
 .setSpentTime(1L)
 ))
 .setPeriodLong(10L)
 .setTotalTrackedTime(7L)
 .setIntensityScore(2));
}

Here’s the same code, without a fluent interface:

How to Speed up Maven Builds

Tue, 26 Aug 2025 07:00:01 +0000

As a Maven project grows in size, the question of build speed and test execution time becomes more important. One of the most obvious ways to optimize is to switch to another build system (e.g., Gradle). However, before making the switch (which will inevitably bring new challenges—we’ll discuss this at the end), let’s first explore what we can do to speed things up while staying on Maven. Many of these tips will be useful regardless, even if you eventually decide to migrate.