Failsafe metadata (open-telemetry#14694)

Author: jaydeluca

docs/instrumentation-list.yaml

@@ -3046,6 +3046,38 @@ libraries:
       description: Whether to instrument all classes that implement the Executor interface.
       type: boolean
       default: false
+  failsafe:
+  - name: failsafe-3.0
+    description: This standalone instrumentation enables metrics for Failsafe circuit
+      breakers.
+    library_link: https://failsafe.dev
+    source_path: instrumentation/failsafe-3.0
+    scope:
+      name: io.opentelemetry.failsafe-3.0
+    target_versions:
+      library:
+      - dev.failsafe:failsafe:3.0.1
+    telemetry:
+    - when: default
+      metrics:
+      - name: failsafe.circuit_breaker.execution.count
+        description: Count of circuit breaker executions.
+        type: LONG_SUM
+        unit: execution
+        attributes:
+        - name: failsafe.circuit_breaker.name
+          type: STRING
+        - name: failsafe.circuit_breaker.outcome
+          type: STRING
+      - name: failsafe.circuit_breaker.state_changes.count
+        description: Count of circuit breaker state changes.
+        type: LONG_SUM
+        unit: execution
+        attributes:
+        - name: failsafe.circuit_breaker.name
+          type: STRING
+        - name: failsafe.circuit_breaker.state
+          type: STRING
   finagle:
   - name: finagle-http-23.11
     description: |

instrumentation-docs/instrumentations.sh

@@ -158,6 +158,7 @@ readonly INSTRUMENTATIONS=(
   "influxdb-2.4:javaagent:test"
   "influxdb-2.4:javaagent:testStableSemconv"
   "java-http-server:javaagent:test"
+  "failsafe-3.0:library:test"
 )
 
 #  Some instrumentation test suites don't run ARM, so we use colima to run them in an x86_64

instrumentation/failsafe-3.0/library/build.gradle.kts

@@ -5,3 +5,7 @@ plugins {
 dependencies {
   library("dev.failsafe:failsafe:3.0.1")
 }
+
+tasks.test {
+  systemProperty("collectMetadata", findProperty("collectMetadata")?.toString() ?: "false")
+}

instrumentation/failsafe-3.0/metadata.yaml

@@ -0,0 +1,2 @@
+description: This standalone instrumentation enables metrics for Failsafe circuit breakers.
+library_link: https://failsafe.dev