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OpenTelemetry auto-instrumentation and instrumentation libraries for Java
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dougqh 726236bd64 Type cache overhaul 
This change overhauls the core type cache

The new approach aims to achieve several things...
1 - cache is strictly bounded -- no variance for number of classes of ClassLoaders
2 - cache is significantly smaller
3 - cache doesn't compromise start-up time
4 - primary eviction policy isn't driven by time
5 - primary eviction policy isn't driven by GC

There are some slight compromises here.
In practice, start-up does increase slightly in a memory rich environment; however, start-up improves considerably in a memory poor environment.

The basic approcach is to have a single unified Guava cache for all ClassLoaders -- nominally keyed a composite of ClassLoader & class name

The ByteBuddy CacheProvider are simply thin wrappers around the Guava cache associated to a particular ClassLoader

However rather than having a large number of WeakReferences floating around.  The cache assigns an ID to each ClassLoader.

To further avoid, consuming memory the cache only preserves a small map of Loader / ID assignments.  This means a ClassLoader may have more than one active ID.

This introduce the possibility for ID exhaustion.  That unlikely case is handle by retiring the internal CacheInstance and starting anew.
 		2020-01-23 10:55:16 -05:00
.circleci Fix CircleCI muzzle build running out of memory 2019-11-27 12:37:43 -08:00
.github Fix log message and add ignores 2019-05-24 11:44:10 -07:00
buildSrc Update muzzle maven URL to use https 2020-01-15 11:22:10 -08:00
dd-java-agent Type cache overhaul 2020-01-23 10:55:16 -05:00
dd-smoke-tests Upgradle to gradle 6.0 2019-11-12 16:26:46 -05:00
dd-trace-api Check for both regular and lowercase names with decorator enabled flags. 2020-01-17 11:05:44 -08:00
dd-trace-ot Check for both regular and lowercase names with decorator enabled flags. 2020-01-17 11:05:44 -08:00
gradle Update bytebuddy to 1.10.6 2020-01-15 10:40:46 -05:00
tooling Copy over dd_jvm_stats.sh from #939 2019-08-20 12:27:36 -07:00
utils Avoid loading `Config` in `DDSpecification` 2019-10-10 12:56:53 -04:00
.editorconfig Apply and enforce google checkstyle and formatting 2017-07-12 07:47:19 -07:00
.gitignore Add crash dumps to gitignore 2019-06-24 12:57:08 -04:00
.gitmodules Use git submodules to load metrics.yaml files 2019-01-08 10:13:18 -08:00
CONTRIBUTING.md Apply suggestions from CR #827 2019-05-17 10:15:03 +02:00
LICENSE Create LICENSE 2017-07-13 11:10:37 -04:00
LICENSE-3rdparty.csv simple load generator tool 2019-11-07 16:50:23 -05:00
NOTICE Create NOTICE 2017-07-13 10:16:04 -04:00
README.md Remove documentation from readme and point to official docs 2018-01-31 16:31:25 -08:00
dd-trace-java.gradle Begin 0.42.0 2020-01-14 11:11:06 -08:00
gradle.properties Try doubling the metaspace size to fix check task. 2019-01-04 13:43:40 -08:00
gradlew Upgradle to gradle 6.0 2019-11-12 16:26:46 -05:00
gradlew.bat Update gradle to 5.5.1 2019-07-12 10:07:08 -04:00
settings.gradle [rmi] Instrumentation for RMI 1.2 and later 2019-12-19 17:20:50 +01:00

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