content: /**
   * 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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.atlas.utils;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Handles logging of performance measurements.
   */
  public final class AtlasPerfTracer {
      private static final long reportingThresholdMs = 0L;
  
      private final Logger logger;
      private final String tag;
      private final long   startTimeMs;
  
      private AtlasPerfTracer(Logger logger, String tag) {
          this.logger = logger;
          this.tag    = tag;
          startTimeMs = System.currentTimeMillis();
      }
  
      public static Logger getPerfLogger(String name) {
          return LoggerFactory.getLogger("org.apache.atlas.perf." + name);
      }
  
      public static Logger getPerfLogger(Class<?> cls) {
          return AtlasPerfTracer.getPerfLogger(cls.getName());
      }
  
      public static boolean isPerfTraceEnabled(Logger logger) {
          return logger.isDebugEnabled();
      }
  
      public static AtlasPerfTracer getPerfTracer(Logger logger, String tag) {
          return new AtlasPerfTracer(logger, tag);
      }
  
      public static void log(AtlasPerfTracer tracer) {
          if (tracer != null) {
              tracer.log();
          }
      }
  
      public String getTag() {
          return tag;
      }
  
      public long getStartTime() {
          return startTimeMs;
      }
  
      public long getElapsedTime() {
          return System.currentTimeMillis() - startTimeMs;
      }
  
      public void log() {
          long elapsedTime = getElapsedTime();
  
          if (elapsedTime > reportingThresholdMs) {
              logger.debug("PERF|{}|{}", tag, elapsedTime);
          }
      }
  }
  