Publish

1 files changed, 70 insertions, 0 deletions

diff --git a/simplemetrics/src/main/java/com/yahoo/metrics/simple/MetricSettings.java b/simplemetrics/src/main/java/com/yahoo/metrics/simple/MetricSettings.java
new file mode 100644
index 00000000000..f47a796948f
--- /dev/null
+++ b/simplemetrics/src/main/java/com/yahoo/metrics/simple/MetricSettings.java
@@ -0,0 +1,70 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.metrics.simple;
+
+import com.google.common.annotations.Beta;
+
+/**
+ * All information needed for creating any extra data structures associated with
+ * a single metric, outside of its basic type.
+ *
+ * @author steinar
+ */
+@Beta
+public final class MetricSettings {
+
+    /**
+     * A builder for the immutable MetricSettings instances.
+     */
+    @Beta
+    public static final class Builder {
+        private boolean histogram = false;
+
+        /**
+         * Create a new builder for a MetricSettings instance with default
+         * settings.
+         */
+        public Builder() {
+        }
+
+        /**
+         * Set whether a resulting metric should have a histogram. Default is
+         * false.
+         *
+         * @param histogram
+         *            whether to generate a histogram
+         * @return this, to facilitate chaining
+         */
+        public Builder histogram(boolean histogram) {
+            this.histogram = histogram;
+            return this;
+        }
+
+        /**
+         * Build a fresh MetricSettings instance.
+         *
+         * @return a MetricSettings instance containing the values set in this
+         *         builder
+         */
+        public MetricSettings build() {
+            return new MetricSettings(histogram);
+        }
+    }
+
+    private final int significantDigits; // could have been static, but would
+                                         // just introduce bugs when we must
+                                         // expose this setting
+    private final boolean histogram;
+
+    private MetricSettings(boolean histogram) {
+        this.histogram = histogram;
+        this.significantDigits = 2;
+    }
+
+    int getSignificantdigits() {
+        return significantDigits;
+    }
+
+    boolean isHistogram() {
+        return histogram;
+    }
+}