[FLINK-34640][metrics] Replace DummyMetricGroup usage with Unregister…

…edMetricsGroup
apache · Mar 14, 2024 · a0c811e · a0c811e
1 parent 649e2b4
commit a0c811e
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Showing 3 changed files with 7 additions and 75 deletions.
diff --git a/flink-core/src/test/java/org/apache/flink/api/common/eventtime/WatermarkStrategyTest.java b/flink-core/src/test/java/org/apache/flink/api/common/eventtime/WatermarkStrategyTest.java
@@ -20,18 +20,12 @@
 
 import org.apache.flink.api.common.ExecutionConfig;
 import org.apache.flink.api.java.ClosureCleaner;
-import org.apache.flink.metrics.CharacterFilter;
-import org.apache.flink.metrics.Counter;
-import org.apache.flink.metrics.Gauge;
-import org.apache.flink.metrics.Histogram;
-import org.apache.flink.metrics.Meter;
-import org.apache.flink.metrics.MetricGroup;
+import org.apache.flink.metrics.groups.UnregisteredMetricsGroup;
 
 import org.junit.jupiter.api.Test;
 
 import java.io.Serializable;
 import java.time.Duration;
-import java.util.Map;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -173,72 +167,10 @@ public long extractTimestamp(Object element, long recordTimestamp) {
     }
 
     static TimestampAssignerSupplier.Context assignerContext() {
-        return DummyMetricGroup::new;
+        return UnregisteredMetricsGroup::new;
     }
 
     static WatermarkGeneratorSupplier.Context generatorContext() {
-        return DummyMetricGroup::new;
-    }
-
-    /**
-     * A dummy {@link MetricGroup} to be used when a group is required as an argument but not
-     * actually used.
-     */
-    public static class DummyMetricGroup implements MetricGroup {
-
-        @Override
-        public Counter counter(String name) {
-            return null;
-        }
-
-        @Override
-        public <C extends Counter> C counter(String name, C counter) {
-            return null;
-        }
-
-        @Override
-        public <T, G extends Gauge<T>> G gauge(String name, G gauge) {
-            return null;
-        }
-
-        @Override
-        public <H extends Histogram> H histogram(String name, H histogram) {
-            return null;
-        }
-
-        @Override
-        public <M extends Meter> M meter(String name, M meter) {
-            return null;
-        }
-
-        @Override
-        public MetricGroup addGroup(String name) {
-            return null;
-        }
-
-        @Override
-        public MetricGroup addGroup(String key, String value) {
-            return null;
-        }
-
-        @Override
-        public String[] getScopeComponents() {
-            return new String[0];
-        }
-
-        @Override
-        public Map<String, String> getAllVariables() {
-            return null;
-        }
-
-        @Override
-        public String getMetricIdentifier(String metricName) {
-            return null;
-        }
-
-        @Override
-        public String getMetricIdentifier(String metricName, CharacterFilter filter) {
-            return null;
-        }
+        return UnregisteredMetricsGroup::new;
     }
 }
diff --git a/...c/test/java/org/apache/flink/runtime/checkpoint/CheckpointCoordinatorMasterHooksTest.java b/...c/test/java/org/apache/flink/runtime/checkpoint/CheckpointCoordinatorMasterHooksTest.java
@@ -19,8 +19,8 @@
 package org.apache.flink.runtime.checkpoint;
 
 import org.apache.flink.api.common.JobID;
-import org.apache.flink.api.common.eventtime.WatermarkStrategyTest.DummyMetricGroup;
 import org.apache.flink.core.io.SimpleVersionedSerializer;
+import org.apache.flink.metrics.groups.UnregisteredMetricsGroup;
 import org.apache.flink.runtime.executiongraph.ExecutionAttemptID;
 import org.apache.flink.runtime.executiongraph.ExecutionGraph;
 import org.apache.flink.runtime.executiongraph.ExecutionGraphCheckpointPlanCalculatorContext;
@@ -500,7 +500,7 @@ private CheckpointCoordinator instantiateCheckpointCoordinator(
                         new ExecutionGraphCheckpointPlanCalculatorContext(graph),
                         graph.getVerticesTopologically(),
                         false),
-                new CheckpointStatsTracker(1, new DummyMetricGroup(), new JobID()));
+                new CheckpointStatsTracker(1, new UnregisteredMetricsGroup(), new JobID()));
     }
 
     private static <T> T mockGeneric(Class<?> clazz) {

diff --git a/.../src/test/java/org/apache/flink/runtime/checkpoint/CheckpointCoordinatorTestingUtils.java b/.../src/test/java/org/apache/flink/runtime/checkpoint/CheckpointCoordinatorTestingUtils.java
@@ -19,11 +19,11 @@
 package org.apache.flink.runtime.checkpoint;
 
 import org.apache.flink.api.common.JobID;
-import org.apache.flink.api.common.eventtime.WatermarkStrategyTest.DummyMetricGroup;
 import org.apache.flink.api.java.tuple.Tuple2;
 import org.apache.flink.core.fs.FSDataInputStream;
 import org.apache.flink.core.fs.Path;
 import org.apache.flink.core.io.SimpleVersionedSerializer;
+import org.apache.flink.metrics.groups.UnregisteredMetricsGroup;
 import org.apache.flink.runtime.OperatorIDPair;
 import org.apache.flink.runtime.concurrent.ComponentMainThreadExecutor;
 import org.apache.flink.runtime.concurrent.ComponentMainThreadExecutorServiceAdapter;
@@ -781,7 +781,7 @@ public static class CheckpointCoordinatorBuilder {
         private boolean allowCheckpointsAfterTasksFinished;
 
         private CheckpointStatsTracker checkpointStatsTracker =
-                new CheckpointStatsTracker(1, new DummyMetricGroup(), new JobID());
+                new CheckpointStatsTracker(1, new UnregisteredMetricsGroup(), new JobID());
 
         private BiFunction<
                         Set<ExecutionJobVertex>,