Add Jedis pool metrics binder

build.gradle

@@ -94,6 +94,7 @@ dependencies {
     implementation 'com.coveo:spillway:3.0.0'
 
     // monitoring
+    implementation 'io.micronaut.micrometer:micronaut-micrometer-core'
     implementation 'io.micronaut.micrometer:micronaut-micrometer-registry-prometheus'
     // Also required to enable endpoint
     implementation 'io.micronaut:micronaut-management'

src/main/groovy/io/seqera/wave/redis/JedisPoolMetricsBinder.groovy

@@ -0,0 +1,61 @@
+/*
+ *  Wave, containers provisioning service
+ *  Copyright (c) 2023-2024, Seqera Labs
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package io.seqera.wave.redis
+
+import groovy.transform.CompileStatic;
+import io.micrometer.core.instrument.MeterRegistry;
+import io.micrometer.core.instrument.binder.MeterBinder;
+import redis.clients.jedis.JedisPool;
+
+/**
+ * Implements {@link MeterBinder} for {@link redis.clients.jedis.JedisPool}
+ *
+ * @author Paolo Di Tommaso <[email protected]>
+ */
+@CompileStatic
+class JedisPoolMetricsBinder implements MeterBinder {
+
+    private final JedisPool pool
+
+    JedisPoolMetricsBinder(JedisPool pool) {
+        this.pool = pool;
+    }
+
+    @Override
+    void bindTo(MeterRegistry registry) {
+        registry.gauge("jedis.pool.active", pool, JedisPool::getNumActive);
+        registry.gauge("jedis.pool.idle", pool, JedisPool::getNumIdle);
+        registry.gauge("jedis.pool.waiters", pool, JedisPool::getNumWaiters);
+
+        // Connection lifecycle metrics
+        registry.gauge("jedis.pool.created", pool, JedisPool::getCreatedCount);
+        registry.gauge("jedis.pool.destroyed", pool, JedisPool::getDestroyedCount);
+
+        // Borrow/Return statistics
+        registry.gauge("jedis.pool.borrowed", pool, JedisPool::getBorrowedCount);
+        registry.gauge("jedis.pool.returned", pool, JedisPool::getReturnedCount);
+
+        // Additional metrics (resets, evictions, etc.)
+        registry.gauge("jedis.pool.max.borrow.wait.millis", pool, (p)-> p.maxBorrowWaitDuration.toMillis() as double)
+        registry.gauge("jedis.pool.mean.borrow.wait.millis", pool, (p)-> p.meanBorrowWaitDuration.toMillis() as double)
+        registry.gauge("jedis.pool.mean.active.millis", pool, (p)-> p.meanActiveDuration.toMillis() as double)
+        registry.gauge("jedis.pool.mean.idle.millis", pool, (p)-> p.meanIdleDuration.toMillis() as double)
+
+    }
+}

src/main/groovy/io/seqera/wave/redis/RedisFactory.groovy

@@ -20,10 +20,12 @@ package io.seqera.wave.redis
 
 import groovy.transform.CompileStatic
 import groovy.util.logging.Slf4j
+import io.micrometer.core.instrument.MeterRegistry
 import io.micronaut.context.annotation.Factory
 import io.micronaut.context.annotation.Requires
 import io.micronaut.context.annotation.Value
 import io.micronaut.core.annotation.Nullable
+import jakarta.inject.Inject
 import jakarta.inject.Singleton
 import redis.clients.jedis.DefaultJedisClientConfig
 import redis.clients.jedis.JedisClientConfig
@@ -42,6 +44,9 @@ import redis.clients.jedis.util.JedisURIHelper
 @CompileStatic
 class RedisFactory {
 
+    @Inject
+    private MeterRegistry meterRegistry
+
     @Singleton
     JedisPool createRedisPool(
             @Value('${redis.uri}') String connection,
@@ -62,7 +67,11 @@ class RedisFactory {
         // client config
         final clientConfig = clientConfig(uri, password, timeout)
         // create the jedis pool
-        return new JedisPool(config, JedisURIHelper.getHostAndPort(uri), clientConfig)
+        final result = new JedisPool(config, JedisURIHelper.getHostAndPort(uri), clientConfig)
+        // Instrument the internal pool
+        new JedisPoolMetricsBinder(result).bindTo(meterRegistry);
+        // final return the jedis pool
+        return result
     }
 
     protected JedisClientConfig clientConfig(URI uri, String password, int timeout) {

src/test/groovy/io/seqera/wave/redis/RedisFactoryTest.groovy

@@ -20,6 +20,7 @@ package io.seqera.wave.redis
 
 import spock.lang.Specification
 
+import io.micrometer.core.instrument.MeterRegistry
 import redis.clients.jedis.exceptions.InvalidURIException
 /**
  *
@@ -28,7 +29,7 @@ import redis.clients.jedis.exceptions.InvalidURIException
 class RedisFactoryTest extends Specification {
     def 'should create redis pool with valid URI'() {
         given:
-        def factory = new RedisFactory()
+        def factory = new RedisFactory(meterRegistry: Mock(MeterRegistry))
 
         when:
         def pool = factory.createRedisPool(URI_STRING, MIN_IDLE, MAX_IDLE, MAX_TOTAL, TIMEOUT, 'password')
@@ -44,7 +45,7 @@ class RedisFactoryTest extends Specification {
 
     def 'should throw exception for invalid URI'() {
         given:
-        def factory = new RedisFactory()
+        def factory = new RedisFactory(meterRegistry: Mock(MeterRegistry))
 
         when:
         factory.createRedisPool(URI_STRING, MIN_IDLE, MAX_IDLE, MAX_TOTAL, TIMEOUT, null)