# Java concurrent queue for tag change scripts

**URL:** <https://forum.inductiveautomation.com/t/java-concurrent-queue-for-tag-change-scripts/82044>\
**Category:** Ignition\
**Created:** [November 17, 2023, 1:53pm UTC](https://forum.inductiveautomation.com/t/java-concurrent-queue-for-tag-change-scripts/82044 "2023-11-17T13:53:19Z")\
**Posts on this page:** 1\
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**Author:** ![bschroeder](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/bschroeder/32/13260_2.png) [@bschroeder](https://forum.inductiveautomation.com/u/bschroeder)\
**Post date:** [November 17, 2023, 1:53pm UTC](https://forum.inductiveautomation.com/t/java-concurrent-queue-for-tag-change-scripts/82044/1 "2023-11-17T13:53:19Z")

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Continuing the discussion from [[SOLVED] Are tag Value Changed scripts running asynchronously?](https://forum.inductiveautomation.com/t/solved-are-tag-value-changed-scripts-running-asynchronously/68704/5):

We've got code in our standard library that I need to log a value change on a tag and then associate various data points with that value change. The value is located in a UDT, and because this is part of our "standard" library we use for our customers, the number of tags is variable and quite possibly numerous so having a gateway tag event script isn't feasible for this solution.

I was reading up on the above-linked thread, and @pturmel mentioned using a Java concurrent queue. Does anyone have any pointers where I can start developing a solution for this?

In reading it seems that I would want to use a ConcurrentLinkedQueue, and add a dictionary of the parameters that are then serviced later on a timer event.

Or am I way off base here?

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