| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.phoenix.trace; |
| |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.hadoop.hbase.util.Pair; |
| import org.apache.htrace.Span; |
| |
| /** |
| * Utilities for tracing |
| */ |
| public class TracingUtils { |
| public static final String METRIC_SOURCE_KEY = "phoenix."; |
| |
| /** Set context to enable filtering */ |
| public static final String METRICS_CONTEXT = "tracing"; |
| |
| /** Marker metric to ensure that we register the tracing mbeans */ |
| public static final String METRICS_MARKER_CONTEXT = "marker"; |
| |
| public static void addAnnotation(Span span, String message, int value) { |
| span.addKVAnnotation(message.getBytes(), Bytes.toBytes(Integer.toString(value))); |
| } |
| |
| public static Pair<String, String> readAnnotation(byte[] key, byte[] value) { |
| return new Pair<String, String>(new String(key), Bytes.toString(value)); |
| } |
| |
| /** |
| * @see #getTraceMetricName(String) |
| */ |
| public static final String getTraceMetricName(long traceId) { |
| return getTraceMetricName(Long.toString(traceId)); |
| } |
| |
| /** |
| * @param traceId unique id of the trace |
| * @return the name of the metric record that should be generated for a given trace |
| */ |
| public static final String getTraceMetricName(String traceId) { |
| return METRIC_SOURCE_KEY + traceId; |
| } |
| } |