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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *   http://www.apache.org/licenses/LICENSE-2.0
   10    *
   11    * Unless required by applicable law or agreed to in writing, software
   12    * distributed under the License is distributed on an "AS IS" BASIS,
   13    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   14    * See the License for the specific language governing permissions and
   15    * limitations under the License.
   16    *
   17    */
   18   
   19   package org.apache.jmeter.visualizers;
   20   
   21   import org.apache.jmeter.samplers.SampleResult;
   22   
   23   /**
   24    * Implement this method to be a Visualizer for JMeter. This interface defines a
   25    * single method, "add()", that provides the means by which
   26    * {@link org.apache.jmeter.samplers.SampleResult SampleResults} are passed to
   27    * the implementing visualizer for display/logging. The easiest way to create
   28    * the visualizer is to extend the
   29    * {@link org.apache.jmeter.visualizers.gui.AbstractVisualizer} class.
   30    *
   31    */
   32   public interface Visualizer {
   33       /**
   34        * This method is called by sampling thread to inform the visualizer about
   35        * the arrival of a new sample.
   36        */
   37       public void add(SampleResult sample);
   38   
   39       /**
   40        * This method is used to indicate a visualizer generates statistics.
   41        *
   42        * @return true if visualiser generates statistics
   43        */
   44       public boolean isStats();
   45   }

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