Jmeter已经内置了各种协议的取样器,已经能满足常用的性能压测需求。且在前面一章Jmeter扩展开发--自定义java取样器-CSDN博客中也有关于Java取样器的扩展开发,不过有时候我们期望能定制自己的取样器和界面。为此,需要对Jmeter做扩展,自定义取样器开发
基本的依赖和打包可以查看前一章Jmeter扩展开发--自定义java取样器-CSDN博客
自定义取样器的使用效果如下图所示:
如上图,成功编写自定义取样器之后,打包,将相关jar包放置在:Jmeter安装目录/lib/ext目录,重启Jmeter即可,当选择某个自定义插件之后,实例界面如下:
在自定义取样器开发中有两个类需要重点介绍
该类是自定义Jmeter取样器的ui显示类,可以直接像操作Swing一样编辑Jmeter取样器的ui界面,如上图2所示。该类包含如下重要方法介绍如下:
自定义取样器在Jmeter界面上显示的名字如下图:
示例代码如下:
- public String getStaticLabel() {
- return "YC http请求";
- }
同上,取样器名称的本地化方法,返回一样即可(其实上层组件调用的是getStaticLabel方法获取取样器名称,如果没有国际化的处理,直接放回相同即可)
- public String getLabelResource() {
- return "YC http请求";
- }
该方法会创建一个AbstractSampler对象返回即可,必须对该对象中的字段做赋值的动作,一般的即是一个ui字段对应一个AbstractSampler字段即可,示例代码如下:
- public TestElement createTestElement() {
- YcSample ycSample = new YcSample();
- ycSample.setUserName(this.userNameField.getText());
- ycSample.setAddress(this.addressField.getText());
- ycSample.setAge(this.ageField.getText());
- ycSample.setScore(this.scoreField.getText());
- return ycSample;
- }
该方法是将UI界面上配置的信息,传递给执行测试Samper对象完成测试,其实就是将界面上传递的参数传递给sampler,完成数据传递的过程,一般的,通过ui界面的字段取值,然后设置到sampler对应的字段值上去即可,实例代码如下:
- public void modifyTestElement(TestElement element) {
- YcSample ycSample = (YcSample)element;
- ycSample.setUserName(this.userNameField.getText());
- ycSample.setAddress(this.addressField.getText());
- ycSample.setAge(this.ageField.getText());
- ycSample.setScore(this.scoreField.getText());
- }
ui的核心方法是构造器的,在构造器中可以直接使用Swing的方法构建ui界面即可,示例方法如下:
- public YcHttpGui() {
- super(); // 此处一定要先调用父类构造器
- setLayout(new BorderLayout());
- setBorder(makeBorder());
- add(makeTitlePanel(), BorderLayout.NORTH);
-
- JPanel mainPanel = new VerticalPanel();
- add(mainPanel, BorderLayout.CENTER);
-
-
- JPanel jPanel = new JPanel();
- jPanel.setLayout(new GridLayout(2,3));
-
- jPanel.add(userNameField);
- jPanel.add(addressField);
- jPanel.add(ageField);
- jPanel.add(scoreField);
-
- VerticalPanel verticalPanel = new VerticalPanel();
- verticalPanel.add(jPanel);
-
- TitledBorder border = BorderFactory.createTitledBorder("用户信息");
- verticalPanel.setBorder(border);
-
- mainPanel.add(verticalPanel);
- }
以上基本是一些ui定式,如果还需要其他的ui元素,添加即可
该类是自定义Jmeter取样器的逻辑运行类,核心方法之后一个sample,说明如下
该方法是自定义取样器的核心逻辑运行方法,只需要返回一个SampleResult对象即可(此处和扩展java取样器逻辑一样),示例代码如下:
- public SampleResult sample(Entry e) {
- SampleResult result = new SampleResult();
- result.sampleStart();
- log.info("userName is:{}",this.userName);
- System.out.println("运行时名称是:" + this.userName);
- result.sampleEnd();
- result.setSuccessful(true);
- result.setSamplerData("this is test!");
- result.setResponseCode("200");
- return result;
- }
自定义Jmeter取样器UI完整代码如下:
- import org.apache.jmeter.gui.util.VerticalPanel;
- import org.apache.jmeter.samplers.gui.AbstractSamplerGui;
- import org.apache.jmeter.testelement.TestElement;
- import org.apache.jorphan.gui.JLabeledTextField;
-
- import javax.swing.*;
- import javax.swing.border.TitledBorder;
- import java.awt.*;
-
- public class YcHttpGui extends AbstractSamplerGui {
-
- private JLabeledTextField userNameField = new JLabeledTextField("用户名");
- private JLabeledTextField addressField = new JLabeledTextField("地址");
- private JLabeledTextField ageField = new JLabeledTextField("年龄");
- private JLabeledTextField scoreField = new JLabeledTextField("score");
-
- public YcHttpGui() {
- super(); // 此处一定要先调用父类构造器
- setLayout(new BorderLayout());
- setBorder(makeBorder());
- add(makeTitlePanel(), BorderLayout.NORTH);
-
- JPanel mainPanel = new VerticalPanel();
- add(mainPanel, BorderLayout.CENTER);
-
-
- JPanel jPanel = new JPanel();
- jPanel.setLayout(new GridLayout(2,3));
-
- jPanel.add(userNameField);
- jPanel.add(addressField);
- jPanel.add(ageField);
- jPanel.add(scoreField);
-
- VerticalPanel verticalPanel = new VerticalPanel();
- verticalPanel.add(jPanel);
-
- TitledBorder border = BorderFactory.createTitledBorder("用户信息");
- verticalPanel.setBorder(border);
-
- mainPanel.add(verticalPanel);
- }
-
- @Override
- public String getStaticLabel() {
- return "YC http请求";
- }
-
- @Override
- public String getLabelResource() {
- return "YC http请求";
- }
-
- @Override
- public TestElement createTestElement() {
- YcSample ycSample = new YcSample();
- ycSample.setUserName(this.userNameField.getText());
- ycSample.setAddress(this.addressField.getText());
- ycSample.setAge(this.ageField.getText());
- ycSample.setScore(this.scoreField.getText());
- return ycSample;
- }
-
- @Override
- public void modifyTestElement(TestElement element) {
- YcSample ycSample = (YcSample)element;
- ycSample.setUserName(this.userNameField.getText());
- ycSample.setAddress(this.addressField.getText());
- ycSample.setAge(this.ageField.getText());
- ycSample.setScore(this.scoreField.getText());
- }
-
- }
自定义Jmeter取样器sampler完整代码如下:
- import lombok.Data;
- import lombok.extern.slf4j.Slf4j;
- import org.apache.jmeter.samplers.AbstractSampler;
- import org.apache.jmeter.samplers.Entry;
- import org.apache.jmeter.samplers.SampleResult;
-
- @Data
- @Slf4j
- public class YcSample extends AbstractSampler {
-
- private String userName;
- private String address;
- private String age;
- private String score;
-
- @Override
- public SampleResult sample(Entry e) {
- SampleResult result = new SampleResult();
- result.sampleStart();
- log.info("userName is:{}",this.userName);
- System.out.println("运行时名称是:" + this.userName);
- result.sampleEnd();
- result.setSuccessful(true);
- result.setSamplerData("this is test!");
- result.setResponseCode("200");
- return result;
- }
- }
后续会继续分享关于Jmeter自定义取样器的源码分析,届时会把相关逻辑梳理清楚