Add MicrometerRegistryManager

service/src/main/java/org/whispersystems/textsecuregcm/metrics/MicrometerRegistryManager.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2022 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.whispersystems.textsecuregcm.metrics;
+
+import io.dropwizard.lifecycle.Managed;
+import io.micrometer.core.instrument.MeterRegistry;
+
+public class MicrometerRegistryManager implements Managed {
+
+  private final MeterRegistry meterRegistry;
+
+  public MicrometerRegistryManager(final MeterRegistry meterRegistry) {
+    this.meterRegistry = meterRegistry;
+  }
+
+  @Override
+  public void start() throws Exception {
+
+  }
+
+  @Override
+  public void stop() throws Exception {
+    // closing the registry publishes one final set of metrics
+    meterRegistry.close();
+  }
+}