JMeter example source code file (RegexFunction.java)
This example JMeter source code file (RegexFunction.java) is included in the DevDaily.com
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/*
* 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.
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*/
package org.apache.jmeter.functions;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Random;
import org.apache.jmeter.engine.util.CompoundVariable;
import org.apache.jmeter.samplers.SampleResult;
import org.apache.jmeter.samplers.Sampler;
import org.apache.jmeter.threads.JMeterVariables;
import org.apache.jmeter.util.JMeterUtils;
import org.apache.jorphan.logging.LoggingManager;
import org.apache.log.Logger;
import org.apache.oro.text.MalformedCachePatternException;
import org.apache.oro.text.regex.MatchResult;
import org.apache.oro.text.regex.Pattern;
import org.apache.oro.text.regex.PatternMatcher;
import org.apache.oro.text.regex.PatternMatcherInput;
import org.apache.oro.text.regex.Perl5Compiler;
import org.apache.oro.text.regex.Util;
/**
* Implements regular expression parsing of sample results and variables
*/
// @see TestRegexFunction for unit tests
public class RegexFunction extends AbstractFunction {
private static final Logger log = LoggingManager.getLoggerForClass();
public static final String ALL = "ALL"; //$NON-NLS-1$
public static final String RAND = "RAND"; //$NON-NLS-1$
public static final String KEY = "__regexFunction"; //$NON-NLS-1$
private Object[] values;// Parameters are stored here
private static final Random rand = new Random();
private static final List<String> desc = new LinkedList();
private static final String TEMPLATE_PATTERN = "\\$(\\d+)\\$"; //$NON-NLS-1$
/** initialised to the regex \$(\d+)\$ */
private final Pattern templatePattern;
// Number of parameters expected - used to reject invalid calls
private static final int MIN_PARAMETER_COUNT = 2;
private static final int MAX_PARAMETER_COUNT = 7;
static {
desc.add(JMeterUtils.getResString("regexfunc_param_1"));// regex //$NON-NLS-1$
desc.add(JMeterUtils.getResString("regexfunc_param_2"));// template //$NON-NLS-1$
desc.add(JMeterUtils.getResString("regexfunc_param_3"));// which match //$NON-NLS-1$
desc.add(JMeterUtils.getResString("regexfunc_param_4"));// between text //$NON-NLS-1$
desc.add(JMeterUtils.getResString("regexfunc_param_5"));// default text //$NON-NLS-1$
desc.add(JMeterUtils.getResString("function_name_paropt")); // output variable name //$NON-NLS-1$
desc.add(JMeterUtils.getResString("regexfunc_param_7"));// input variable //$NON-NLS-1$
}
public RegexFunction() {
templatePattern = JMeterUtils.getPatternCache().getPattern(TEMPLATE_PATTERN,
Perl5Compiler.READ_ONLY_MASK);
}
/** {@inheritDoc} */
@Override
public synchronized String execute(SampleResult previousResult, Sampler currentSampler)
throws InvalidVariableException {
String valueIndex = "", defaultValue = "", between = ""; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
String name = ""; //$NON-NLS-1$
String inputVariable = ""; //$NON-NLS-1$
Pattern searchPattern;
Object[] tmplt;
try {
searchPattern = JMeterUtils.getPatternCache().getPattern(((CompoundVariable) values[0]).execute(),
Perl5Compiler.READ_ONLY_MASK);
tmplt = generateTemplate(((CompoundVariable) values[1]).execute());
if (values.length > 2) {
valueIndex = ((CompoundVariable) values[2]).execute();
}
if (valueIndex.length() == 0) {
valueIndex = "1"; //$NON-NLS-1$
}
if (values.length > 3) {
between = ((CompoundVariable) values[3]).execute();
}
if (values.length > 4) {
String dv = ((CompoundVariable) values[4]).execute();
if (dv.length() != 0) {
defaultValue = dv;
}
}
if (values.length > 5) {
name = ((CompoundVariable) values[5]).execute();
}
if (values.length > 6) {
inputVariable = ((CompoundVariable) values[6]).execute();
}
} catch (MalformedCachePatternException e) {
throw new InvalidVariableException(e.toString());
}
// Relatively expensive operation, so do it once
JMeterVariables vars = getVariables();
if (vars == null){// Can happen if called during test closedown
return defaultValue;
}
if (name.length() > 0) {
vars.put(name, defaultValue);
}
String textToMatch=null;
if (inputVariable.length() > 0){
textToMatch=vars.get(inputVariable);
} else if (previousResult != null){
textToMatch = previousResult.getResponseDataAsString();
}
if (textToMatch == null || textToMatch.length() == 0) {
return defaultValue;
}
List<MatchResult> collectAllMatches = new ArrayList();
try {
PatternMatcher matcher = JMeterUtils.getMatcher();
PatternMatcherInput input = new PatternMatcherInput(textToMatch);
while (matcher.contains(input, searchPattern)) {
MatchResult match = matcher.getMatch();
collectAllMatches.add(match);
}
} catch (NumberFormatException e) {//TODO: can this occur?
log.error("", e); //$NON-NLS-1$
return defaultValue;
} finally {
if (name.length() > 0){
vars.put(name + "_matchNr", "" + collectAllMatches.size()); //$NON-NLS-1$ //$NON-NLS-2$
}
}
if (collectAllMatches.size() == 0) {
return defaultValue;
}
if (valueIndex.equals(ALL)) {
StringBuilder value = new StringBuilder();
Iterator<MatchResult> it = collectAllMatches.iterator();
boolean first = true;
while (it.hasNext()) {
if (!first) {
value.append(between);
} else {
first = false;
}
value.append(generateResult(it.next(), name, tmplt, vars));
}
return value.toString();
} else if (valueIndex.equals(RAND)) {
MatchResult result = collectAllMatches.get(rand.nextInt(collectAllMatches.size()));
return generateResult(result, name, tmplt, vars);
} else {
try {
int index = Integer.parseInt(valueIndex) - 1;
MatchResult result = collectAllMatches.get(index);
return generateResult(result, name, tmplt, vars);
} catch (NumberFormatException e) {
float ratio = Float.parseFloat(valueIndex);
MatchResult result = collectAllMatches
.get((int) (collectAllMatches.size() * ratio + .5) - 1);
return generateResult(result, name, tmplt, vars);
} catch (IndexOutOfBoundsException e) {
return defaultValue;
}
}
}
private void saveGroups(MatchResult result, String namep, JMeterVariables vars) {
if (result != null) {
for (int x = 0; x < result.groups(); x++) {
vars.put(namep + "_g" + x, result.group(x)); //$NON-NLS-1$
}
}
}
/** {@inheritDoc} */
public List<String> getArgumentDesc() {
return desc;
}
private String generateResult(MatchResult match, String namep, Object[] template, JMeterVariables vars) {
saveGroups(match, namep, vars);
StringBuilder result = new StringBuilder();
for (int a = 0; a < template.length; a++) {
if (template[a] instanceof String) {
result.append(template[a]);
} else {
result.append(match.group(((Integer) template[a]).intValue()));
}
}
if (namep.length() > 0){
vars.put(namep, result.toString());
}
return result.toString();
}
/** {@inheritDoc} */
@Override
public String getReferenceKey() {
return KEY;
}
/** {@inheritDoc} */
@Override
public synchronized void setParameters(Collection<CompoundVariable> parameters) throws InvalidVariableException {
checkParameterCount(parameters, MIN_PARAMETER_COUNT, MAX_PARAMETER_COUNT);
values = parameters.toArray();
}
private Object[] generateTemplate(String rawTemplate) {
List<String> pieces = new ArrayList();
// String or Integer
List<Object> combined = new LinkedList
