【大话性能】性能测试jmeter如何扩展function，新人也可以快速掌握 - 51Testing软件测试论坛

package jmeter.test.functions;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import java.util.Random;
import org.apache.jmeter.engine.util.CompoundVariable;
import org.apache.jmeter.functions.AbstractFunction;
import org.apache.jmeter.functions.InvalidVariableException;
import org.apache.jmeter.samplers.SampleResult;
import org.apache.jmeter.samplers.Sampler;
public class MyRandomFunc extends AbstractFunction {
// 自定义function的描述
private static final List<String> desc = new LinkedList<String>();
static {
desc.add("Get a random int within specified parameter value.");
}
// function名称
private static final String KEY = "__MyRandomFunc";
private static final int MAX_PARA_COUNT = 1;
private static final int MIN_PARA_COUNT = 1;
// 传入参数的值
private Object[] values;
private Random r = new Random();
@Override
public List<String> getArgumentDesc() {
return desc;
}
@Override
public String execute(SampleResult previousResult, Sampler currentSampler) throws InvalidVariableException {
try {
int max = new Integer(((CompoundVariable) values[0]).execute().trim());
int val = r.nextInt(max);
return String.valueOf(val);
} catch (Exception ex) {
throw new InvalidVariableException(ex);
}
}
@Override
public String getReferenceKey() {
return KEY;
}
@Override
public void setParameters(Collection<CompoundVariable> parameters) throws InvalidVariableException {
checkParameterCount(parameters, MIN_PARA_COUNT, MAX_PARA_COUNT); // 检查参数的个数是否正确
values = parameters.toArray(); // 将值存入类变量中。
}
}

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