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Asked: 2026-06-12T12:14:24+00:00

I have the following scenario. I have two tables. One stores multi values that

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I have the following scenario.
I have two tables. One stores multi values that are counters for transactions. Through a java application the first table value is read, incremented and written to the second table, as well as the new value being written back to the first table. Obviously there is potential for this to go wrong as it’s a multiple user system.
My solution, in Java, to the issue is to provide Locks that have to, well should, be aquired before any action can be taken on either table. These Locks, ReentrantLocks, are static and there is one for each column in Table 1 as the values are completely independent of each other.

Is this a recommended approached?

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  1. Editorial Team

    No. Use implicit Database Locks1 for Database Concurrency. Relational databases support Transactions which are a vital part of ACID: use them.

    Java-centric locks will not work cross-VM and as such will not help in multi-User/Server environments.

    1 Databases are smart enough to acquire/release locks to ensure Consistency and Isolation and may even use “lock free” implementations such as MVCC. There are rare occasions when explicit database locks must be requested, but this is an advanced use-case.

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