✨ Add histogram for configuration saving times

diff --git a/src/main/java/net/pterodactylus/sone/core/Core.java b/src/main/java/net/pterodactylus/sone/core/Core.java
index 6525ac3..d79cd40 100644 (file)
--- a/src/main/java/net/pterodactylus/sone/core/Core.java
+++ b/src/main/java/net/pterodactylus/sone/core/Core.java
@@ -88,6 +88,7 @@ import net.pterodactylus.util.service.AbstractService;
 import net.pterodactylus.util.thread.NamedThreadFactory;
 
 import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Stopwatch;
 import com.google.common.collect.FluentIterable;
 import com.google.common.collect.HashMultimap;
 import com.google.common.collect.Multimap;
@@ -176,6 +177,7 @@ public class Core extends AbstractService implements SoneProvider, PostProvider,
        private volatile long lastConfigurationUpdate;
 
        private final MetricRegistry metricRegistry;
+       private final Histogram configurationSaveTimeHistogram;
 
        /**
         * Creates a new core.
@@ -207,6 +209,7 @@ public class Core extends AbstractService implements SoneProvider, PostProvider,
                this.database = database;
                this.metricRegistry = metricRegistry;
                preferences = new Preferences(eventBus);
+               this.configurationSaveTimeHistogram = metricRegistry.histogram("configuration.save.duration", () -> new Histogram(new ExponentiallyDecayingReservoir(3000, 0)));
        }
 
        //
@@ -1546,7 +1549,9 @@ public class Core extends AbstractService implements SoneProvider, PostProvider,
                        database.save();
 
                        /* now save it. */
+                       Stopwatch stopwatch = Stopwatch.createStarted();
                        configuration.save();
+                       configurationSaveTimeHistogram.update(stopwatch.elapsed(TimeUnit.MICROSECONDS));
 
                } catch (ConfigurationException ce1) {
                        logger.log(Level.SEVERE, "Could not store configuration!", ce1);