Virtual threads let us keep ordinary blocking code while many more requests wait concurrently. Under load, however, that brings three critical questions into focus: How much work do we admit? Cheap threads can still build an expensive queue. What belongs inside a lock? A sleeping lock holder still makes everyone else wait. Who stops abandoned … Read more
Structured concurrency has reached its sixth preview in Java 26 through JEP 525, and at this point, it’s no longer experimental in spirit. The idea is simple and surprisingly powerful: if you start a few related tasks together, you should manage them together. They succeed or fail as a unit. This sounds obvious, but it’s … Read more
The structured concurrency API changed again after two incubations and four rounds of previews. Ideally, this scenario is unexpected. However, given its status as a preview API, such changes can occur, as was the case here. These changes lend considerable maturity to the API, and I am hopeful it will now stabilize without requiring further … Read more
In the context of virtual threads, pinning refers to the condition where a virtual thread is “stuck” to its carrier thread (the platform thread on which it runs).
A compelling narrative around web crawling in Java, contrasting classical threads with their newer counterpart: virtual threads.
As we inch to the release of JDK 21 in September (next month!), get familiar with the features and improvements this version will bring!
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