Jan 28, 2021 · A java.util.concurrent.locks.ReadWriteLock is a high-level thread lock tool. It allows various threads to read a specific resource but allows only one to write it, at a time. The approach is, that multiple threads can read from a shared resource without causing concurrency errors.

Jul 8, 2019 · Using ReadWriteLock, you can improve performance of an application in which more reads are performed on a shared object than writes. ReadWriteLock maintains two locks for read and write operations. Only one lock either read or write can be acquired at the same time.

Mar 26, 2025 · Simply put, a lock is a more flexible and sophisticated thread synchronization mechanism than the standard synchronized block. The Lock interface has been around since Java 1.5. It’s defined inside the java.util.concurrent.lock package, and it provides extensive operations for locking.

Determining whether to grant the read lock or the write lock, when both readers and writers are waiting, at the time that a writer releases the write lock. Writer preference is common, as writes are expected to be short and infrequent.

May 26, 2022 · ReentrantReadWriteLock class of Java is an implementation of ReadWriteLock, that also supports ReentrantLock functionality. The ReadWriteLock is a pair of associated locks, one for read-only operations and one for writing.

Feb 2, 2022 · ReadWriteLock is an interface in java. A ReadWriteLock allows us to add a thread-safety feature to a data structure while increasing throughput by allowing multiple threads to read the data concurrently and one thread to update the data exclusively.

Oct 18, 2015 · Read/Write locks - also known as Shared/Exclusive locks - are designed for use cases where an application allows simultaneous read access to some piece of data by multiple processes at the same time, while restricting write access to …

May 28, 2011 · Locking a node would be locking it using its write lock and locking every parent using read locks. A parent cannot be locked while a child is, because you cannot acquire its write lock as locking a child already acquired the read lock.

Aug 13, 2019 · In this Java concurrency tutorial, you will understand how ReadWriteLock works and use it for simple cases with ReentrantReadWriteLock implementation.

Feb 13, 2025 · A ReadWriteLock has two types of locks: Read Lock: Multiple threads can hold this lock at the same time. Used when a thread wants to read the shared resource.