JMeter example source code file (InterleaveControl.java)

This example JMeter source code file (InterleaveControl.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

ignore_sub_controllers, interleavecontrol, interleavecontrol, io, nextisnullexception, nextisnullexception, override, override, sampler, sampler, serializable, string, style, testelement, use_sub_controllers

The JMeter InterleaveControl.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.samplers.Sampler;
import org.apache.jmeter.testelement.TestElement;
import org.apache.jmeter.testelement.property.IntegerProperty;

public class InterleaveControl extends GenericController implements Serializable {
    private static final long serialVersionUID = 233L;

    private static final String STYLE = "InterleaveControl.style";// $NON-NLS-1$

    public static final int IGNORE_SUB_CONTROLLERS = 0;

    public static final int USE_SUB_CONTROLLERS = 1;

    private boolean skipNext;

    private transient TestElement searchStart = null;

    private boolean currentReturnedAtLeastOne;

    private boolean stillSame = true;

    /***************************************************************************
     * Constructor for the InterleaveControl object
     **************************************************************************/
    public InterleaveControl() {
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void reInitialize() {
        setFirst(true);
        currentReturnedAtLeastOne = false;
        searchStart = null;
        stillSame = true;
        skipNext = false;
        incrementIterCount();
        recoverRunningVersion();
    }

    public void setStyle(int style) {
        setProperty(new IntegerProperty(STYLE, style));
    }

    public int getStyle() {
        return getPropertyAsInt(STYLE);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Sampler next() {
        if (isSkipNext()) {
            reInitialize();
            return null;
        }
        return super.next();
    }

   /**
     * {@inheritDoc}
     */
    @Override
    protected Sampler nextIsAController(Controller controller) throws NextIsNullException {
        Sampler sampler = controller.next();
        if (sampler == null) {
            currentReturnedNull(controller);
            return next();
        }
        currentReturnedAtLeastOne = true;
        if (getStyle() == IGNORE_SUB_CONTROLLERS) {
            incrementCurrent();
            skipNext = true;
        } else {
            searchStart = null;
        }
        return sampler;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected Sampler nextIsASampler(Sampler element) throws NextIsNullException {
        skipNext = true;
        incrementCurrent();
        return element;
    }

    /**
     * If the current is null, reset and continue searching. The searchStart
     * attribute will break us off when we start a repeat.
     * <p>
     * {@inheritDoc}
     */
    @Override
    protected Sampler nextIsNull() {
        resetCurrent();
        return next();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void setCurrentElement(TestElement currentElement) throws NextIsNullException {
        // Set the position when next is first called, and don't overwrite
        // until reInitialize is called.
        if (searchStart == null) {
            searchStart = currentElement;
        } else if (searchStart == currentElement && !stillSame) {
            // We've gone through the whole list and are now back at the start
            // point of our search.
            reInitialize();
            throw new NextIsNullException();
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void currentReturnedNull(Controller c) {
        if (c.isDone()) {
            removeCurrentElement();
        } else if (getStyle() == USE_SUB_CONTROLLERS) {
            incrementCurrent();
        }
    }

    protected boolean isSkipNext() {
        return skipNext;
    }

    protected void setSkipNext(boolean skipNext) {
        this.skipNext = skipNext;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void incrementCurrent() {
        if (currentReturnedAtLeastOne) {
            skipNext = true;
        }
        stillSame = false;
        super.incrementCurrent();
    }
}