Set of standard tag names/values (#60)

tritium-registry/src/main/java/com/palantir/tritium/metrics/tags/MetricTags.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2017 Palantir Technologies, Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.palantir.tritium.metrics.tags;
+
+/**
+ * The standard set of metric tags as well as constant tag values.
+ */
+public final class MetricTags {
+
+    private MetricTags() {}
+
+    public static final String SERVICE_NAME = "service-name";
+    public static final String ENDPOINT = "endpoint";
+    public static final String USER_AGENT = "user-agent";
+
+    /**
+     * Tags for response code families.
+     */
+    public static final String RESPONSE_FAMILY = "family";
+    public static final String RESPONSE_1XX = "1xx";
+    public static final String RESPONSE_2XX = "2xx";
+    public static final String RESPONSE_3XX = "3xx";
+    public static final String RESPONSE_4XX = "4xx";
+    public static final String RESPONSE_5XX = "5xx";
+    public static final String RESPONSE_OTHER = "other";
+}