# springBoot整合redission框架
pom依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.redisson</groupId>
<artifactId>redisson-spring-boot-starter</artifactId>
<version>3.12.5</version>
</dependency>
<!--整合redission框架enc-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
</dependency>
YML配置
spring:
#redisson配置,默认连接库0,无密码只配置连接地址即可
redis:
host: 127.0.0.1
database: 0
password:
redission锁使用
package com.cyc.redission.n1;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import java.util.Calendar;
import java.util.concurrent.TimeUnit;
@RestController
@RequestMapping("/lock")
public class RedissonLockTest {
public static int amount = 5;
@Autowired
private RedissonClient redissonClient;
//没获取到锁阻塞线程
@RequestMapping(value = "/test", method = RequestMethod.GET)
public Integer test() {
RLock lock = null;
try {
//TODO 创建一个名字为lock的锁,如果是并发访问,会阻塞到 lock.lock();,知道2秒后,才能执行下面的逻辑代码
lock = redissonClient.getLock("lock");
lock.lock();
System.out.println(formatDate() + " " + Thread.currentThread().getName() + "获取到锁");
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
if (null != lock && lock.isHeldByCurrentThread()) {
lock.unlock();
}
}
return amount;
}
//立刻返回获取锁的状态
@RequestMapping("/test1")
public Integer test1() {
RLock lock = null;
try {
lock = redissonClient.getLock("lock");
//TODO 判断获取锁,执行业务逻辑,否则直接返回提示信息
if (lock.tryLock()) {
System.out.println(formatDate() + " " + Thread.currentThread().getName() + "获取到锁");
Thread.sleep(2000);
} else {
System.out.println(formatDate() + " " + Thread.currentThread().getName() + "已抢光");
}
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
if (null != lock && lock.isHeldByCurrentThread()) {
lock.unlock();
}
}
return amount;
}
//立刻返回获取锁的状态
@RequestMapping("/test2")
public Integer test2() {
RLock lock = redissonClient.getLock("lock"); //非公平锁,随机取一个等待中的线程分配锁
//RLock lock=redissonClient.getFairLock("lock"); //公平锁,按照先后顺序依次分配锁
try {
if (lock.tryLock(2, 10, TimeUnit.SECONDS)) { //最多等待锁2秒,10秒后强制解锁,推荐使用
System.out.println(formatDate() + " " + Thread.currentThread().getName() + "获取到锁");
Thread.sleep(4500);
} else {
System.out.println(formatDate() + " " + Thread.currentThread().getName() + "未获取到锁");
}
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
if (null != lock && lock.isHeldByCurrentThread()) {
lock.unlock();
}
}
return amount;
}
public String formatDate() {
Calendar c = Calendar.getInstance();
return c.get(Calendar.SECOND) + ":" + c.get(Calendar.MILLISECOND);
}
}
限流器
package com.cyc.redission.n1;
import org.redisson.api.RRateLimiter;
import org.redisson.api.RateIntervalUnit;
import org.redisson.api.RateType;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/*
* 限流器
* 1.先调用init方法生成5个令牌
* 2.通过该限流器的名称rateLimiter来获取令牌limiter.tryAcquire()
* 3.谁抢到,谁先执行,否则返回提示信息,可以用于秒杀场景
* */
@RestController
@RequestMapping("/limiter")
public class RateLimiterTest {
@Autowired
private RedissonClient redissonClient;
//初始化限流器
@RequestMapping("/init")
public void init() {
RRateLimiter limiter = redissonClient.getRateLimiter("rateLimiter");
limiter.trySetRate(RateType.PER_CLIENT, 5, 1, RateIntervalUnit.SECONDS);//每1秒产生5个令牌
}
//获取令牌
@RequestMapping("/thread")
public void thread() {
RRateLimiter limiter = redissonClient.getRateLimiter("rateLimiter");
if (limiter.tryAcquire()) {//尝试获取1个令牌
System.out.println(Thread.currentThread().getName() + "成功获取到令牌");
} else {
System.out.println(Thread.currentThread().getName() + "未获取到令牌");
}
}
}
List、Queue测试
package com.cyc.redission.n1;
import org.redisson.api.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.PostConstruct;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.function.Consumer;
//List、Queue测试
@RestController
@RequestMapping("/collection")
public class RedisQueueTest {
@Autowired
private RedissonClient redissonClient;
/**
* //List测试 - 添加元素
* http://127.0.0.1:8080/collection//list/add?a="亚春2"
* http://127.0.0.1:8080/collection//list/add?a="亚春2"
* 1. 可添加相同名称的元素
*
* @param a
* @return
*/
@RequestMapping("/list/add")
public List<String> addAndGetList(String a) {
RList<String> list = redissonClient.getList("my_list");
list.add(a);
return list.readAll();
}
/**
* //List测试 - 删除元素
* http://127.0.0.1:8080/collection//list/del?a="亚春2"
* 1 removeAll():删除值相同的多个元素
* 2 remove()删除元素,仅删除匹配到的第一个元素
*
* @param a
* @return
*/
@RequestMapping("/list/del")
public List<String> removeList(String a) {
RList<String> list = redissonClient.getList("my_list");
/* 自定义删除条件
list.removeIf(new Predicate<String>() {
@Override
public boolean test(String s) {
return s.length()>10;
}
});*/
//list.remove(a);//删除元素,仅删除匹配到的第一个元素
list.removeAll(Arrays.asList(a));//删除指定集合中所有元素
return list.readAll();
}
//Queue测试 - 添加元素
@RequestMapping("/queue/add")
public List<String> addQueue(String a) {
RQueue<String> list = redissonClient.getQueue("my_queue");
list.add(a);//添加一个元素到集合最末尾
return list.readAll();
}
//Queue测试 - 读取元素
@RequestMapping("/queue/poll")
public String pollQueue() {
RQueue<String> list = redissonClient.getQueue("my_queue");
return list.poll();//从队列的头部获取一个元素并从队列中删除该元素,队列为空时返回null
}
//Blocking Queue测试 - 添加元素
@RequestMapping("/blocking/add")
public List<String> addBlockingQueue(String a) {
RBlockingQueue<String> list = redissonClient.getBlockingQueue("my_blocking_queue");
list.add(a);
return list.readAll();
}
//Blocking Queue测试 - 读取元素
@RequestMapping("/blocking/get")
public String getBlockingQueue() throws InterruptedException {
RBlockingQueue<String> list = redissonClient.getBlockingQueue("my_blocking_queue");
//return list.poll();//从队列的头部获取一个元素并从队列中删除该元素,队列为空时返回null
return list.take();//从队列的头部获取一个元素并从队列中删除该元素,队列为空时阻塞线程
//return list.peek();//从队列的头部获取一个元素但不删除该元素,队列为空时返回null
}
//Delayed Queue测试 - 添加元素
@RequestMapping("/delayed/add")
public List<String> addDelayedQueue(String a, Long b) {
RQueue<String> queue = redissonClient.getQueue("my_blocking_queue");//目标队列
RDelayedQueue<String> list = redissonClient.getDelayedQueue(queue);//延迟队列,数据临时存放地,发出后删除该元素
list.offer(a, b, TimeUnit.SECONDS);
return list.readAll();
}
@PostConstruct
public void acceptElement() {
RBlockingQueue<String> list = redissonClient.getBlockingQueue("my_blocking_queue");
list.subscribeOnElements(new Consumer<String>() {
public void accept(String s) {
System.out.println("获取到元素:" + s);
}
});
}
}
RedisRScoredSortedSet
package com.cyc.redission.n1;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.time.DateUtils;
import org.redisson.api.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.Date;
import java.util.concurrent.TimeUnit;
@Slf4j
@RestController
@RequestMapping("/score")
public class RedisRScoredSortedSet {
@Autowired
private RedissonClient redissonClient;
@RequestMapping("/add")
public String addScore(String a,Double b){
//创建Set
RScoredSortedSet<String> set = redissonClient.getScoredSortedSet("simpleSet1");
//设置过期时间
boolean exists=set.isExists();
set.addListener(new ExpiredObjectListener() {
public void onExpired(String name) {
System.out.println("超时事件被触发,name="+name);
log.info("超时事件被触发,name={}",name);
}
});
//添加元素
set.addScore(a,b);
if(!exists) {
set.expireAt(DateUtils.addMinutes(new Date(), 2));
}
//获取元素在集合中的位置
Integer index=set.revRank(a);
//获取元素的评分
Double score=set.getScore(a);
log.info("size={},a={},index={},score={}",set.size(),a,index,score);
//可以设置单一元属过期,但是不能触发对应过期事件
RSetCache<String> map = redissonClient.getSetCache("simpleSet2");
map.add(a,1, TimeUnit.MINUTES);
//TODO 可设置,但不会触发监听.
map.addListener(new ExpiredObjectListener() {
public void onExpired(String name) {
log.info("entryExpiredListener超时事件被触发,event={}",name);
}
});
//不能设置单一元属过期
RSet<String> set1 = redissonClient.getSet("simpleSet3");
set1.add(a);
return "SUCCESS";
}
@RequestMapping("/show")
public String showList(String key){
log.info("排行榜={}", key);
RScoredSortedSet<String> set = redissonClient.getScoredSortedSet(key);
set.stream().forEach(a->{
Integer index=set.revRank(a);//获取元素在集合中的位置
Double score=set.getScore(a);//获取元素的评分
log.info("size={},key={},index={},score={}", set.size(), a, index, score);
});
return "SUCCESS";
}
@RequestMapping("/clear")
public String clearList(){
long size=redissonClient.getKeys().deleteByPattern("*impl*");
log.info("删除数量:{}",size);
return "SUCCESS";
}
@RequestMapping("/deleteAll")
public String deleteAll(String pattern){
long amount=redissonClient.getKeys().deleteByPattern(pattern);
log.info("删除数量:{}",amount);
return "SUCCESS";
}
}
RedissonMapTest
package com.cyc.redission.n1;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RMapCache;
import org.redisson.api.RedissonClient;
import org.redisson.api.map.event.EntryEvent;
import org.redisson.api.map.event.EntryExpiredListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.PostConstruct;
import java.util.concurrent.TimeUnit;
@Slf4j
@RestController
@RequestMapping("/map")
public class RedissonMapTest {
@Autowired
private RedissonClient redissonClient;
//测试map集合的名称
private final static String key = "my_test_map";
/**
* //初始化Listener,仅初始化一次,过期事件不一定那么及时触发,存在一定的延时
* //注意如果触发2次,则会执行2次回调..
*/
@PostConstruct
public void init() {
//redissonClient.getXXX来创建不同类型的map ,KEY为要执行监听的key
RMapCache<String, String> map = redissonClient.getMapCache(key);
map.addListener(new EntryExpiredListener<String, String>() {
@Override
public void onExpired(EntryEvent<String, String> event) {
log.info("{}已过期,原来的值为:{},现在的值为:{}", event.getKey(), event.getOldValue(), event.getValue());
}
});
log.info("{}初始化完成", key);
}
//存放Key-Value对
//http://127.0.0.1:8080/map/put/?a=myKey&b=myKeyValue22&flag=true
@RequestMapping("/put")
public String put(String a, String b, boolean flag) {
//redissonClient.getXXX来创建不同类型的map ,KEY为要执行监听的key
RMapCache<String, String> map = redissonClient.getMapCache(key);
if (flag) {
map.put(a, b, 2, TimeUnit.SECONDS);//key设置有效时间,并在实现时,触发上面的监听函数
} else {
map.put(a, b);
}
log.info("设置{}={}成功", a, b);
return "SUCCESS";
}
/**
* 遍历map中的所以元素,需要指定key
*
* @return
*/
@RequestMapping("/show")
public String put() {
RMapCache<String, String> map = redissonClient.getMapCache(key);
map.keySet().stream().forEach(i -> log.info("{},{}", i, map.get(i)));
return "SUCCESS";
}
}
RedisTopicTest
package com.cyc.redission.n1;
import org.redisson.api.RTopic;
import org.redisson.api.RedissonClient;
import org.redisson.api.listener.MessageListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.PostConstruct;
/*
* 话题(订阅分发)
* */
@RestController
@RequestMapping("/topic")
public class RedisTopicTest {
@Autowired
private RedissonClient redissonClient;
/**
* //分发
* http://127.0.0.1:8080/topic/produce?a=redis主题
*
* @param a
* @return
*/
@RequestMapping("/produce")
public String produce(String a) {
RTopic topic = redissonClient.getTopic("anyTopic");
topic.publish(a);
return "发送消息:" + a;
}
//订阅
@PostConstruct
public void consume() {
RTopic topic = redissonClient.getTopic("anyTopic");//订阅指定话题
//RPatternTopic topic=redissonClient.getPatternTopic("*any*");//指定话题表达式订阅多个话题
topic.addListener(String.class, new MessageListener<String>() {
@Override
public void onMessage(CharSequence charSequence, String map) {
System.out.println("接收到消息:" + map);
}
});
}
}
RedisTransactionTest
package com.cyc.redission.n1;
import org.apache.commons.lang3.RandomUtils;
import org.redisson.api.RMap;
import org.redisson.api.RTransaction;
import org.redisson.api.RedissonClient;
import org.redisson.api.TransactionOptions;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.concurrent.TimeUnit;
/*
* Redisson为RMap、RMapCache、RLocalCachedMap、RSet、RSetCache和RBucket这样的对象提供了具有ACID属性的事务功能
* Redisson事务通过分布式锁保证了连续写入的原子性,同时在内部通过操作指令队列实现了Redis原本没有的提交与滚回功能
* 当提交与滚回遇到问题的时候,将通过org.redisson.transaction.TransactionException告知用户
* */
@RestController
@RequestMapping("/tx")
public class RedisTransactionTest {
@Autowired
private RedissonClient redissonClient;
@RequestMapping("/test/{key}")
public void test(@PathVariable String key){
TransactionOptions options=TransactionOptions.defaults().syncSlavesTimeout(5, TimeUnit.SECONDS)
.responseTimeout(3,TimeUnit.SECONDS).retryInterval(2,TimeUnit.SECONDS)
.retryAttempts(3).timeout(5,TimeUnit.SECONDS);
RTransaction transaction=redissonClient.createTransaction(options);
RMap<String, Integer> map=transaction.getMap("myMap");
System.out.println(map.get("userId"));
map.put("userId", RandomUtils.nextInt(1,100));
System.out.println(map.get(key).toString());
try {
transaction.commit();
} catch (Exception e) {
e.printStackTrace();
transaction.rollback();
}
}
}
CountDownLatchTest
package com.cyc.redission.n1;
import org.redisson.api.RCountDownLatch;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.concurrent.TimeUnit;
@RestController
@RequestMapping("/count")
public class CountDownLatchTest {
@Autowired
private RedissonClient redissonClient;
//主线程等待所有子线程完成
@RequestMapping("/await")
public void await(){
try {
RCountDownLatch latch = redissonClient.getCountDownLatch("latch");
latch.trySetCount(3);//设置计数器初始大小
long count = latch.getCount();
System.out.println("count = " + count);
latch.await();//阻塞线程直到计数器归零
System.out.println(Thread.currentThread().getName()+"所有子线程已运行完毕");
} catch (InterruptedException e) {
e.printStackTrace();
}
}
//子线程
@RequestMapping("/thread")
public void thread(){
try {
RCountDownLatch latch = redissonClient.getCountDownLatch("latch");
System.out.println(Thread.currentThread().getName()+"抵达现场");
TimeUnit.SECONDS.sleep(1);
latch.countDown();//计数器减1,当计数器归零后通知所有等待着的线程恢复执行
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}