SpringBoot如何實現動態控制定時任務支持多參數功能
這篇文章將為大家詳細講解有關SpringBoot如何實現動態控制定時任務支持多參數功能，小編覺得挺實用的，因此分享給大家做個參考，希望大家閱讀完這篇文章后可以有所收獲。
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由于工作上的原因，需要進行定時任務的動態增刪改查，網上大部分資料都是整合quertz框架實現的。本人查閱了一些資料，發現springBoot本身就支持實現定時任務的動態控制。并進行改進，現支持任意多參數定時任務配置
實現結果如下圖所示：
后臺測試顯示如下：
github 簡單demo地址如下：
springboot-dynamic-task
1.定時任務的配置類：SchedulingConfig
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
/**
* @program: simple-demo
* @description: 定時任務配置類
* @author: CaoTing
* @date: 2019/5/23
**/
@Configuration
public class SchedulingConfig {
@Bean
public TaskScheduler taskScheduler() {
ThreadPoolTaskScheduler taskScheduler = new ThreadPoolTaskScheduler();
// 定時任務執行線程池核心線程數
taskScheduler.setPoolSize(4);
taskScheduler.setRemoveOnCancelPolicy(true);
taskScheduler.setThreadNamePrefix("TaskSchedulerThreadPool-");
return taskScheduler;
}
}2.定時任務注冊類：CronTaskRegistrar
這個類包含了新增定時任務，移除定時任務等等核心功能方法
import com.caotinging.demo.task.ScheduledTask;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.config.CronTask;
import org.springframework.stereotype.Component;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* @program: simple-demo
* @description: 添加定時任務注冊類，用來增加、刪除定時任務。
* @author: CaoTing
* @date: 2019/5/23
**/
@Component
public class CronTaskRegistrar implements DisposableBean {
private final Map<Runnable, ScheduledTask> scheduledTasks = new ConcurrentHashMap<>(16);
@Autowired
private TaskScheduler taskScheduler;
public TaskScheduler getScheduler() {
return this.taskScheduler;
}
/**
* 新增定時任務
* @param task
* @param cronExpression
*/
public void addCronTask(Runnable task, String cronExpression) {
addCronTask(new CronTask(task, cronExpression));
}
public void addCronTask(CronTask cronTask) {
if (cronTask != null) {
Runnable task = cronTask.getRunnable();
if (this.scheduledTasks.containsKey(task)) {
removeCronTask(task);
}
this.scheduledTasks.put(task, scheduleCronTask(cronTask));
}
}
/**
* 移除定時任務
* @param task
*/
public void removeCronTask(Runnable task) {
ScheduledTask scheduledTask = this.scheduledTasks.remove(task);
if (scheduledTask != null)
scheduledTask.cancel();
}
public ScheduledTask scheduleCronTask(CronTask cronTask) {
ScheduledTask scheduledTask = new ScheduledTask();
scheduledTask.future = this.taskScheduler.schedule(cronTask.getRunnable(), cronTask.getTrigger());
return scheduledTask;
}
@Override
public void destroy() {
for (ScheduledTask task : this.scheduledTasks.values()) {
task.cancel();
}
this.scheduledTasks.clear();
}
}3.定時任務執行類：SchedulingRunnable
import com.caotinging.demo.utils.SpringContextUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.ReflectionUtils;
import java.lang.reflect.Method;
import java.util.Objects;
/**
* @program: simple-demo
* @description: 定時任務運行類
* @author: CaoTing
* @date: 2019/5/23
**/
public class SchedulingRunnable implements Runnable {
private static final Logger logger = LoggerFactory.getLogger(SchedulingRunnable.class);
private String beanName;
private String methodName;
private Object[] params;
public SchedulingRunnable(String beanName, String methodName) {
this(beanName, methodName, null);
}
public SchedulingRunnable(String beanName, String methodName, Object...params ) {
this.beanName = beanName;
this.methodName = methodName;
this.params = params;
}
@Override
public void run() {
logger.info("定時任務開始執行 - bean：{}，方法：{}，參數：{}", beanName, methodName, params);
long startTime = System.currentTimeMillis();
try {
Object target = SpringContextUtils.getBean(beanName);
Method method = null;
if (null != params && params.length > 0) {
Class<?>[] paramCls = new Class[params.length];
for (int i = 0; i < params.length; i++) {
paramCls[i] = params[i].getClass();
}
method = target.getClass().getDeclaredMethod(methodName, paramCls);
} else {
method = target.getClass().getDeclaredMethod(methodName);
}
ReflectionUtils.makeAccessible(method);
if (null != params && params.length > 0) {
method.invoke(target, params);
} else {
method.invoke(target);
}
} catch (Exception ex) {
logger.error(String.format("定時任務執行異常 - bean：%s，方法：%s，參數：%s ", beanName, methodName, params), ex);
}
long times = System.currentTimeMillis() - startTime;
logger.info("定時任務執行結束 - bean：{}，方法：{}，參數：{}，耗時：{} 毫秒", beanName, methodName, params, times);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
SchedulingRunnable that = (SchedulingRunnable) o;
if (params == null) {
return beanName.equals(that.beanName) &&
methodName.equals(that.methodName) &&
that.params == null;
}
return beanName.equals(that.beanName) &&
methodName.equals(that.methodName) &&
params.equals(that.params);
}
@Override
public int hashCode() {
if (params == null) {
return Objects.hash(beanName, methodName);
}
return Objects.hash(beanName, methodName, params);
}
}4.定時任務控制類：ScheduledTask
import java.util.concurrent.ScheduledFuture;
/**
* @program: simple-demo
* @description: 定時任務控制類
* @author: CaoTing
* @date: 2019/5/23
**/
public final class ScheduledTask {
public volatile ScheduledFuture<?> future;
/**
* 取消定時任務
*/
public void cancel() {
ScheduledFuture<?> future = this.future;
if (future != null) {
future.cancel(true);
}
}
}5.定時任務的測試
編寫一個需要用于測試的任務類
import org.springframework.stereotype.Component;
/**
* @program: simple-demo
* @description:
* @author: CaoTing
* @date: 2019/5/23
**/
@Component("demoTask")
public class DemoTask {
public void taskWithParams(String param1, Integer param2) {
System.out.println("這是有參示例任務：" + param1 + param2);
}
public void taskNoParams() {
System.out.println("這是無參示例任務");
}
}進行單元測試
import com.caotinging.demo.application.DynamicTaskApplication;
import com.caotinging.demo.application.SchedulingRunnable;
import com.caotinging.demo.config.CronTaskRegistrar;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
/**
* @program: simple-demo
* @description: 測試定時任務
* @author: CaoTing
* @date: 2019/5/23
**/
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = DynamicTaskApplication.class)
public class TaskTest {
@Autowired
CronTaskRegistrar cronTaskRegistrar;
@Test
public void testTask() throws InterruptedException {
SchedulingRunnable task = new SchedulingRunnable("demoTask", "taskNoParams", null);
cronTaskRegistrar.addCronTask(task, "0/10 * * * * ?");
// 便于觀察
Thread.sleep(3000000);
}
@Test
public void testHaveParamsTask() throws InterruptedException {
SchedulingRunnable task = new SchedulingRunnable("demoTask", "taskWithParams", "haha", 23);
cronTaskRegistrar.addCronTask(task, "0/10 * * * * ?");
// 便于觀察
Thread.sleep(3000000);
}
}6.工具類：SpringContextUtils
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
/**
* @program: simple-demo
* @description: spring獲取bean工具類
* @author: CaoTing
* @date: 2019/5/23
**/
@Component
public class SpringContextUtils implements ApplicationContextAware {
private static ApplicationContext applicationContext = null;
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
if (SpringContextUtils.applicationContext == null) {
SpringContextUtils.applicationContext = applicationContext;
}
}
//獲取applicationContext
public static ApplicationContext getApplicationContext() {
return applicationContext;
}
//通過name獲取 Bean.
public static Object getBean(String name) {
return getApplicationContext().getBean(name);
}
//通過class獲取Bean.
public static <T> T getBean(Class<T> clazz) {
return getApplicationContext().getBean(clazz);
}
//通過name,以及Clazz返回指定的Bean
public static <T> T getBean(String name, Class<T> clazz) {
return getApplicationContext().getBean(name, clazz);
}
}7.我的pom依賴
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatisplus-spring-boot-starter</artifactId> <version>1.0.5</version> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus</artifactId> <version>2.1.9</version> </dependency> <dependency> <groupId>MySQL</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.9</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-aop</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- 數據庫--> <!--<dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency>--> <!-- https://mvnrepository.com/artifact/com.hynnet/oracle-driver-ojdbc --> <!--<dependency> <groupId>com.oracle</groupId> <artifactId>ojdbc6</artifactId> <version>11.2.0.1.0</version> </dependency>--> <!-- 單元測試 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>provided</scope> </dependency> <!--redisTemplate --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.7.3</version> </dependency> <!-- http連接 restTemplate --> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient-cache</artifactId> </dependency> <!-- 工具--> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.31</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> </dependency> <dependency> <groupId>commons-lang</groupId> <artifactId>commons-lang</artifactId> <version>2.6</version> </dependency> <!-- https://mvnrepository.com/artifact/com.google/guava --> <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>10.0.1</version> </dependency> <!-- pinyin4j --> <dependency> <groupId>com.belerweb</groupId> <artifactId>pinyin4j</artifactId> <version>2.5.0</version> </dependency> </dependencies>
springboot是什么
springboot一種全新的編程規范，其設計目的是用來簡化新Spring應用的初始搭建以及開發過程，SpringBoot也是一個服務于框架的框架，服務范圍是簡化配置文件。
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