[jmx-scraper] Create weaver model for jmx-scraper metrics #2072

 - fixed the updated desc in JvmIntegrationTest

Author: mcmho

jmx-scraper/src/integrationTest/java/io/opentelemetry/contrib/jmxscraper/target_systems/JvmIntegrationTest.java

@@ -186,7 +186,7 @@ protected MetricsVerifier createMetricsVerifier() {
             "jvm.threads.count",
             metric ->
                 metric
-                    .hasDescription("number of threads")
+                    .hasDescription("current number of thread count")
                     .hasUnit("{thread}")
                     .isGauge()
                     .hasDataPointsWithoutAttributes());

jmx-scraper/src/main/resources/jvm.yaml

@@ -75,13 +75,13 @@ rules:
     mapping:
       Usage.committed:
         metric: jvm.memory.pool.committed
-        desc: current memory pool usage
+        desc: current memory pool size
       Usage.init:
         metric: jvm.memory.pool.init
-        desc: current memory pool usage
+        desc: initial memory pool size
       Usage.max:
         metric: jvm.memory.pool.max
-        desc: current memory pool usage
+        desc: max memory pool size
       Usage.used:
         metric: jvm.memory.pool.used
         desc: current memory pool usage
@@ -92,4 +92,4 @@ rules:
       ThreadCount:
         metric: jvm.threads.count
         unit: "{thread}"
-        desc: number of threads
+        desc: current number of thread count

jmx-scraper/templates/registry/rules/jvm.yaml.j2

@@ -98,19 +98,19 @@ rules:
       {%- if m.id == jvm_memory_prefix + "pool.committed" %}
       Usage.committed:
         metric: {{ m.id | safe }}
-        desc: current memory pool usage
+        desc: {{ m.brief | safe }}
       {%- elif m.id == jvm_memory_prefix + "pool.init" %}
       Usage.init:
         metric: {{ m.id | safe }}
-        desc: current memory pool usage
+        desc: {{ m.brief | safe }}
       {%- elif m.id == jvm_memory_prefix + "pool.max" %}
       Usage.max:
         metric: {{ m.id | safe }}
-        desc: current memory pool usage
+        desc: {{ m.brief | safe }}
       {%- elif m.id == jvm_memory_prefix + "pool.used" %}
       Usage.used:
         metric: {{ m.id | safe }}
-        desc: current memory pool usage
+        desc: {{ m.brief | safe }}
       {%- endif %}
       {%- endfor %}
 
@@ -121,4 +121,4 @@ rules:
         {%- set m_threads_count = (ctx.groups | selectattr("id", "equalto", "jvm.threads.count") | first) %}
         metric: {{ m_threads_count.id | safe}}
         unit: "{{ m_threads_count.unit | safe }}"
-        desc: number of threads
+        desc: {{ m_threads_count.brief | safe }}