Am 28.11.2017 um 08:11 schrieb pmouawad@apache.org:
> Author: pmouawad
> Date: Tue Nov 28 07:11:35 2017
> New Revision: 1816519
>
> URL: http://svn.apache.org/viewvc?rev=1816519&view=rev
> Log:
> Bug 61802 - Loop / ForEach Controller should expose a variable for current iteration
> Bugzilla Id: 61802
>
> Modified:
>      jmeter/trunk/src/components/org/apache/jmeter/control/ForeachController.java
>      jmeter/trunk/src/core/org/apache/jmeter/control/LoopController.java
>      jmeter/trunk/src/core/org/apache/jmeter/util/JMeterUtils.java
>      jmeter/trunk/test/src/org/apache/jmeter/control/TestLoopController.java
>      jmeter/trunk/xdocs/changes.xml
>
> Modified: jmeter/trunk/src/components/org/apache/jmeter/control/ForeachController.java
> URL: http://svn.apache.org/viewvc/jmeter/trunk/src/components/org/apache/jmeter/control/ForeachController.java?rev=1816519&r1=1816518&r2=1816519&view=diff
> ==============================================================================
> --- jmeter/trunk/src/components/org/apache/jmeter/control/ForeachController.java (original)
> +++ jmeter/trunk/src/components/org/apache/jmeter/control/ForeachController.java Tue Nov 28 07:11:35 2017
> @@ -24,7 +24,9 @@ import org.apache.jmeter.samplers.Sample
>   import org.apache.jmeter.testelement.property.BooleanProperty;
>   import org.apache.jmeter.testelement.property.StringProperty;
>   import org.apache.jmeter.threads.JMeterContext;
> +import org.apache.jmeter.threads.JMeterContextService;
>   import org.apache.jmeter.threads.JMeterVariables;
> +import org.apache.jmeter.util.JMeterUtils;
>   import org.slf4j.Logger;
>   import org.slf4j.LoggerFactory;
>   
> @@ -36,6 +38,7 @@ import org.slf4j.LoggerFactory;
>    *
>    */
>   public class ForeachController extends GenericController implements Serializable {
> +
>       private static final Logger log = LoggerFactory.getLogger(ForeachController.class);
>   
>       private static final long serialVersionUID = 241L;
> @@ -195,12 +198,21 @@ public class ForeachController extends G
>       // Prevent entry if nothing to do
>       @Override
>       public Sampler next() {
> -        if (emptyList()) {
> -            reInitialize();
> -            resetLoopCount();
> -            return null;
> +        try {
> +            if (emptyList()) {
> +                reInitialize();
> +                resetLoopCount();
> +                return null;
> +            }
> +            return super.next();
> +        } finally {
> +            JMeterVariables variables = JMeterContextService.getContext().getVariables();
> +            if(variables != null) {
> +                variables.putObject(
> +                    JMeterUtils.formatJMeterExportedVariableName(
> +                            getName()+LoopController.INDEX_VAR_NAME_SUFFIX), loopCount);
> +            }
>           }
> -        return super.next();
>       }
>   
>       /**
>
> Modified: jmeter/trunk/src/core/org/apache/jmeter/control/LoopController.java
> URL: http://svn.apache.org/viewvc/jmeter/trunk/src/core/org/apache/jmeter/control/LoopController.java?rev=1816519&r1=1816518&r2=1816519&view=diff
> ==============================================================================
> --- jmeter/trunk/src/core/org/apache/jmeter/control/LoopController.java (original)
> +++ jmeter/trunk/src/core/org/apache/jmeter/control/LoopController.java Tue Nov 28 07:11:35 2017
> @@ -25,12 +25,16 @@ import org.apache.jmeter.testelement.pro
>   import org.apache.jmeter.testelement.property.IntegerProperty;
>   import org.apache.jmeter.testelement.property.JMeterProperty;
>   import org.apache.jmeter.testelement.property.StringProperty;
> +import org.apache.jmeter.threads.JMeterContextService;
> +import org.apache.jmeter.threads.JMeterVariables;
> +import org.apache.jmeter.util.JMeterUtils;
>   
>   /**
>    * Class that implements the Loop Controller, ie iterate infinitely or a configured number of times
>    */
>   public class LoopController extends GenericController implements Serializable {
> -
> +    static final String INDEX_VAR_NAME_SUFFIX = "__idx";
Should this be private?

> +
>       public static final int INFINITE_LOOP_COUNT = -1; // $NON-NLS-1$
>       
>       public static final String LOOPS = "LoopController.loops"; // $NON-NLS-1$
> @@ -114,15 +118,23 @@ public class LoopController extends Gene
>        */
>       @Override
>       public Sampler next() {
> -        if(endOfLoop()) {
> -            if (!getContinueForever()) {
> -                setDone(true);
> +        try {
> +            if(endOfLoop()) {
> +                if (!getContinueForever()) {
> +                    setDone(true);
> +                }
> +                return null;
> +            }
> +            return super.next();
> +        } finally {
> +            JMeterVariables variables = JMeterContextService.getContext().getVariables();
> +            if(variables != null) {
> +                variables.putObject(
> +                        JMeterUtils.formatJMeterExportedVariableName(getName()+INDEX_VAR_NAME_SUFFIX), loopCount);
>               }
> -            return null;
>           }
> -        return super.next();
>       }
> -
> +
>       private boolean endOfLoop() {
>           final int loops = getLoops();
>           return (loops > INFINITE_LOOP_COUNT) && (loopCount >= loops);
>
> Modified: jmeter/trunk/src/core/org/apache/jmeter/util/JMeterUtils.java
> URL: http://svn.apache.org/viewvc/jmeter/trunk/src/core/org/apache/jmeter/util/JMeterUtils.java?rev=1816519&r1=1816518&r2=1816519&view=diff
> ==============================================================================
> --- jmeter/trunk/src/core/org/apache/jmeter/util/JMeterUtils.java (original)
> +++ jmeter/trunk/src/core/org/apache/jmeter/util/JMeterUtils.java Tue Nov 28 07:11:35 2017
> @@ -79,7 +79,7 @@ import com.thoughtworks.xstream.security
>    */
>   public class JMeterUtils implements UnitTestManager {
>       private static final Logger log = LoggerFactory.getLogger(JMeterUtils.class);
> -
> +    private static final String JMETER_VARS_PREFIX = "__jm__";
>       // Note: cannot use a static variable here, because that would be processed before the JMeter properties
>       // have been defined (Bug 52783)
>       private static class LazyPatternCacheHolder {
> @@ -1261,4 +1261,16 @@ public class JMeterUtils implements Unit
>           // TODO : How much are we concerned by CVE-2013-7285
>           xstream.addPermission(AnyTypePermission.ANY);
>       }
> +
> +    /**
> +     * @param elementName String elementName
> +     * @return variable name for index following JMeter convention
> +     */
> +    public static String formatJMeterExportedVariableName(String elementName) {
> +        StringBuilder builder = new StringBuilder(
> +                JMETER_VARS_PREFIX.length()+elementName.length());
> +        return builder.append(JMETER_VARS_PREFIX)
> +                .append(elementName)
> +                .toString();

a "return JMETER_VARS_PREFIX + elementName;" is probably more readable 
and should result in some equivalent bytecode.

Regards,
  Felix

> +    }
>   }
>
> Modified: jmeter/trunk/test/src/org/apache/jmeter/control/TestLoopController.java
> URL: http://svn.apache.org/viewvc/jmeter/trunk/test/src/org/apache/jmeter/control/TestLoopController.java?rev=1816519&r1=1816518&r2=1816519&view=diff
> ==============================================================================
> --- jmeter/trunk/test/src/org/apache/jmeter/control/TestLoopController.java (original)
> +++ jmeter/trunk/test/src/org/apache/jmeter/control/TestLoopController.java Tue Nov 28 07:11:35 2017
> @@ -36,12 +36,17 @@ import org.apache.jmeter.testelement.pro
>   import org.apache.jmeter.threads.JMeterContext;
>   import org.apache.jmeter.threads.JMeterContextService;
>   import org.apache.jmeter.threads.JMeterVariables;
> +import org.apache.jmeter.util.JMeterUtils;
>   import org.junit.Test;
>   
>   public class TestLoopController extends JMeterTestCase {
>   
>           @Test
>           public void testProcessing() throws Exception {
> +            JMeterContext jmctx = JMeterContextService.getContext();
> +            JMeterVariables variables = new JMeterVariables();
> +            jmctx.setVariables(variables);
> +
>               GenericController controller = new GenericController();
>               GenericController sub_1 = new GenericController();
>               sub_1.addTestElement(new TestSampler("one"));
> @@ -49,6 +54,8 @@ public class TestLoopController extends
>               controller.addTestElement(sub_1);
>               controller.addTestElement(new TestSampler("three"));
>               LoopController sub_2 = new LoopController();
> +            String lcName = "LC";
> +            sub_2.setName(lcName);
>               sub_2.setLoops(3);
>               GenericController sub_3 = new GenericController();
>               sub_2.addTestElement(new TestSampler("four"));
> @@ -65,41 +72,72 @@ public class TestLoopController extends
>               sub_2.setRunningVersion(true);
>               sub_3.setRunningVersion(true);
>               controller.initialize();
> +            int loopControl = 0;
>               for (int i = 0; i < 2; i++) {
> +                loopControl = 0;
>                   assertEquals(15, counter);
>                   counter = 0;
>                   TestElement sampler = null;
>                   while ((sampler = controller.next()) != null) {
>                       assertEquals(order[counter++], sampler.getName());
> +                    if("four".equals(sampler.getName())) {
> +                        Integer value = (Integer) variables.getObject(
> +                                JMeterUtils.formatJMeterExportedVariableName(lcName+LoopController.INDEX_VAR_NAME_SUFFIX));
> +                        assertNotNull(value);
> +                        assertEquals(Integer.valueOf(loopControl++), value);
> +                    }
>                   }
> +
>               }
> +
>           }
>   
>           @Test
>           public void testLoopZeroTimes() throws Exception {
> +            JMeterContext jmctx = JMeterContextService.getContext();
> +            JMeterVariables variables = new JMeterVariables();
> +            jmctx.setVariables(variables);
> +
>               LoopController loop = new LoopController();
> +            String lcName = "LC";
> +            loop.setName(lcName);
>               loop.setLoops(0);
>               loop.addTestElement(new TestSampler("never run"));
>               loop.initialize();
>               assertNull(loop.next());
> +            Integer value = (Integer) variables.getObject(
> +                    JMeterUtils.formatJMeterExportedVariableName(lcName+LoopController.INDEX_VAR_NAME_SUFFIX));
> +            assertNotNull(value);
> +            assertEquals(Integer.valueOf(0), value);
>           }
>   
>           @Test
>           public void testInfiniteLoop() throws Exception {
> +            JMeterContext jmctx = JMeterContextService.getContext();
>               LoopController loop = new LoopController();
> +            String lcName = "LC";
> +            loop.setName(lcName);
>               loop.setLoops(LoopController.INFINITE_LOOP_COUNT);
>               loop.addTestElement(new TestSampler("never run"));
> +            JMeterVariables variables = new JMeterVariables();
> +            jmctx.setVariables(variables);
>               loop.setRunningVersion(true);
>               loop.initialize();
>               for (int i = 0; i < 42; i++) {
>                   assertNotNull(loop.next());
> +                Integer value = (Integer) variables.getObject(
> +                        JMeterUtils.formatJMeterExportedVariableName(lcName+LoopController.INDEX_VAR_NAME_SUFFIX));
> +                assertNotNull(value);
> +                assertEquals(Integer.valueOf(i), value);
>               }
>           }
>               
>           @Test
>           public void testBug54467() throws Exception {
>               JMeterContext jmctx = JMeterContextService.getContext();
> +            String lcName = "LC";
>               LoopController loop = new LoopController();
> +            loop.setName(lcName);
>               Map<String, String> variables = new HashMap<>();
>               ReplaceStringWithFunctions transformer = new ReplaceStringWithFunctions(new CompoundVariable(), variables);
>               jmctx.setVariables(new JMeterVariables());
> @@ -116,6 +154,10 @@ public class TestLoopController extends
>               for (int i = 0; i < loops; i++) {
>                   Sampler s = loop.next();
>                   assertNotNull(s);
> +                Integer value = (Integer) jmctx.getVariables().getObject(
> +                        JMeterUtils.formatJMeterExportedVariableName(lcName+LoopController.INDEX_VAR_NAME_SUFFIX));
> +                assertNotNull(value);
> +                assertEquals(Integer.valueOf(i), value);
>               }
>               assertNull(loop.next());
>           }
>
> Modified: jmeter/trunk/xdocs/changes.xml
> URL: http://svn.apache.org/viewvc/jmeter/trunk/xdocs/changes.xml?rev=1816519&r1=1816518&r2=1816519&view=diff
> ==============================================================================
> --- jmeter/trunk/xdocs/changes.xml [utf-8] (original)
> +++ jmeter/trunk/xdocs/changes.xml [utf-8] Tue Nov 28 07:11:35 2017
> @@ -172,6 +172,7 @@ Summary
>       <li><bug>61640</bug>JSR223 Test Elements : Enable by default caching. Contributed by Ubik Load Pack (support at ubikloadpack.com)</li>
>       <li><bug>61785</bug>Add <menuchoice><guimenuitem>Help</guimenuitem><guimenuitem>Useful links</guimenuitem></menuchoice> to create issues and download nightly build</li>
>       <li><bug>61808</bug>Fix main frame position. Implemented by Artem Fedorov (artem at blazemeter.com) and contributed by BlazeMeter Ltd.</li>
> +    <li><bug>61802</bug>Loop / ForEach Controller should expose a variable for current iteration. Contributed by Ubik Load Pack (support at ubikloadpack.com)</li>
>   </ul>
>   
>   <ch_section>Non-functional changes</ch_section>
>
>