Publish fcm retry metrics

gcm-sender-async/src/main/java/org/whispersystems/gcm/server/Sender.java

@@ -151,4 +151,8 @@ public class Sender {
     }
   }
 
+  public Retry getRetry() {
+    return retry;
+  }
+
 }

gcm-sender-async/src/test/resources/logback-test.xml

@@ -0,0 +1,6 @@
+<!-- Turning down the wiremock logging -->
+<logger name="com.github.tomakehurst.wiremock" level="WARN"/>
+<logger name="wiremock.org" level="ERROR"/>
+<logger name="WireMock" level="WARN"/>
+<!-- wiremock has per endpoint servlet logging -->
+<logger name="/" level="WARN"/>

service/src/main/java/org/whispersystems/textsecuregcm/push/GCMSender.java

@@ -12,6 +12,7 @@ import org.whispersystems.gcm.server.Sender;
 import org.whispersystems.textsecuregcm.storage.Account;
 import org.whispersystems.textsecuregcm.storage.AccountsManager;
 import org.whispersystems.textsecuregcm.storage.Device;
+import org.whispersystems.textsecuregcm.util.CircuitBreakerUtil;
 import org.whispersystems.textsecuregcm.util.Constants;
 import org.whispersystems.textsecuregcm.util.SystemMapper;
 import org.whispersystems.textsecuregcm.util.Util;
@@ -49,6 +50,8 @@ public class GCMSender implements Managed {
   public GCMSender(AccountsManager accountsManager, String signalKey) {
     this.accountsManager = accountsManager;
     this.signalSender    = new Sender(signalKey, SystemMapper.getMapper(), 6);
+
+    CircuitBreakerUtil.registerMetrics(metricRegistry, signalSender.getRetry(), Sender.class);
   }
 
   @VisibleForTesting

service/src/main/java/org/whispersystems/textsecuregcm/util/CircuitBreakerUtil.java

@@ -5,7 +5,6 @@ import com.codahale.metrics.MetricRegistry;
 
 import static com.codahale.metrics.MetricRegistry.name;
 import io.github.resilience4j.circuitbreaker.CircuitBreaker;
-import io.github.resilience4j.retry.AsyncRetry;
 import io.github.resilience4j.retry.Retry;
 
 public class CircuitBreakerUtil {