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:chart_with_upwards_trend: Capturing JVM- and application-level metrics. So you know what's going on...

7.1K Stars 1.7K Forks Last release: 10 days ago (v4.1.10.1) Apache License 2.0 2.7K Commits 94 Releases

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Capturing JVM- and application-level metrics. So you know what's going on.

For more information, please see the documentation.


Version 4.x.x (Javadoc)

Version 4.x.x (the last release is 4.1.7) is Java 8/9 compatible and the most fresh release of Metrics. The version targets Java 8 and removes a lot of internal cruft from 3.2.x (for instance, there's no dependency on the Unsafe API and custom




implementations). It's mostly compatible with the 3.2 API and the update should be painless in Java 8 environments. If you have a 3rd party application which is dependent on an old version of Metrics, you can force a new version by adding


to your Maven configuration. Check out the release notes for 4.0.0.

Source code for 4.1.x resides in the release/4.1.x branch.

Source code for 4.0.x resides in the release/4.0.x branch.

Version 3.2.x (Javadoc)

Version 3.2.x (the last release is 3.2.6) is Java 6 compatible and the most stable release of Metrics. 3.2.x was actively developed in 2017 and has many new features compared to 3.1.x (check out the release notes). Currently 3.2.x version is in maintenance mode. No future development is planned, but bugfixes are ported and you can expect maintenance releases.

Source code for 3.2.x resides in the release/3.2.x branch.

Version 3.1.x (Javadoc)

Version 3.1.x (the last release is 3.1.5) is a Java 6 compatible release of Metrics. It's the most common distribution of Metrics, albeit not actively developed and maintained. Version 3.1.2 was released in April, 2015 and since then there's been only a handful of bugfixes ported to this branch. If you're using Metrics 3.1.x , please strongly consider upgrading to 4.1.x , because this version is practically EOL. No future releases of 3.1.x are expected.

Source code for 3.1.x resides in the release/3.1.x branch.

Future development

New not-backward compatible features (for example, support for tags) will be implemented in a 5.x.x release. The release will have new Maven coordinates, a new package name and a backwards-incompatible API.

Source code for 5.x.x resides in the release/5.0.x branch.


Copyright (c) 2010-2013 Coda Hale,, 2014-2020 Dropwizard Team

Published under Apache Software License 2.0, see LICENSE

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