JMeter example source code file (OnceOnlyController.java)

This example JMeter source code file (OnceOnlyController.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

genericcontroller, io, loopcontroller, loopiterationlistener, loopiterationlistener, nextisnullexception, nextisnullexception, onceonlycontroller, onceonlycontroller, override, sampler, serializable, serializable

The JMeter OnceOnlyController.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.control;

import java.io.Serializable;

import org.apache.jmeter.engine.event.LoopIterationEvent;
import org.apache.jmeter.engine.event.LoopIterationListener;
import org.apache.jmeter.samplers.Sampler;

/**
 * Controller to run its children once per cycle.
 */
public class OnceOnlyController extends GenericController implements Serializable, LoopIterationListener {

    private static final long serialVersionUID = 240L;

    /**
     * Constructor for the OnceOnlyController object.
     */
    public OnceOnlyController() {
    }

    /**
     * @see LoopIterationListener#iterationStart(LoopIterationEvent)
     */
    public void iterationStart(LoopIterationEvent event) {
        int numIteration = 1;
        // Bug 39509: iteration to 0 for all controller which not LoopController (and TG)
        if (!(event.getSource() instanceof LoopController)) {
            numIteration = 0;
        }
        if (event.getIteration() == numIteration) {
            reInitialize();
        }
    }

    @Override
    protected Sampler nextIsNull() throws NextIsNullException {
        return null;
    }
}