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JMeter example source code file (ExampleSampler.java)

This example JMeter source code file (ExampleSampler.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - JMeter tags/keywords

abstractsampler, data, examplesampler, examplesampler, logger, non-nls-1, non-nls-1, ok, sampler, sampleresult, sampleresult, start, string, string

The JMeter ExampleSampler.java source code

/*
 * 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.jmeter.examples.sampler;

import org.apache.jmeter.samplers.AbstractSampler;
import org.apache.jmeter.samplers.Entry;
import org.apache.jmeter.samplers.SampleResult;
import org.apache.jorphan.logging.LoggingManager;
import org.apache.log.Logger;

/**
 * Example Sampler (non-Bean version)
 *
 * JMeter creates an instance of a sampler class for every occurrence of the
 * element in every thread. [some additional copies may be created before the
 * test run starts]
 *
 * Thus each sampler is guaranteed to be called by a single thread - there is no
 * need to synchronize access to instance variables.
 *
 * However, access to class fields must be synchronized.
 *
 * @version $Revision: 937663 $
 */
public class ExampleSampler extends AbstractSampler {

    private static final long serialVersionUID = 240L;

    private static final Logger log = LoggingManager.getLoggerForClass();

    // The name of the property used to hold our data
    public final static String DATA = "ExampleSampler.data"; //$NON-NLS-1$

    private static int classCount = 0; // keep track of classes created

    // (for instructional purposes only!)

    public ExampleSampler() {
        classCount++;
        trace("ExampleSampler()");
    }

    /**
     * {@inheritDoc}
     */
    public SampleResult sample(Entry e) {
        trace("sample()");
        SampleResult res = new SampleResult();
        boolean isOK = false; // Did sample succeed?
        String data = getData(); // Sampler data
        String response = null;

        res.setSampleLabel(getTitle());
        /*
         * Perform the sampling
         */
        res.sampleStart(); // Start timing
        try {

            // Do something here ...

            response = Thread.currentThread().getName();

            /*
             * Set up the sample result details
             */
            res.setSamplerData(data);
            res.setResponseData(response, null);
            res.setDataType(SampleResult.TEXT);

            res.setResponseCodeOK();
            res.setResponseMessage("OK");// $NON-NLS-1$
            isOK = true;
        } catch (Exception ex) {
            log.debug("", ex);
            res.setResponseCode("500");// $NON-NLS-1$
            res.setResponseMessage(ex.toString());
        }
        res.sampleEnd(); // End timimg

        res.setSuccessful(isOK);

        return res;
    }

    /**
     * @return a string for the sampleResult Title
     */
    private String getTitle() {
        return this.getName();
    }

    /**
     * @return the data for the sample
     */
    public String getData() {
        return getPropertyAsString(DATA);
    }

    /*
     * Helper method
     */
    private void trace(String s) {
        String tl = getTitle();
        String tn = Thread.currentThread().getName();
        String th = this.toString();
        log.debug(tn + " (" + classCount + ") " + tl + " " + s + " " + th);
    }
}

Other JMeter examples (source code examples)

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