1 /* 2 * Copyright 2019 Google LLC 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package io.perfmark; 18 19 import javax.annotation.Nullable; 20 21 /** Tag is a dynamic, runtime created identifier (such as an RPC id). */ 22 public final class Tag { 23 @Nullable final String tagName; 24 final long tagId; 25 Tag(@ullable String tagName, long tagId)26 Tag(@Nullable String tagName, long tagId) { 27 // tagName should be non-null, but checking is expensive 28 this.tagName = tagName; 29 this.tagId = tagId; 30 } 31 } 32