生产者收到单条消息后暂存,当暂存的消息到达N条,或者暂存的时间达到M秒,那么一次性将所有暂存的消息写入Redis List中; java代码设计并实现
时间: 2023-05-27 20:08:05 浏览: 45
1. 定义Producer类,其中包含一个List用于暂存消息,一个计数器用于累计消息数量,以及一个定时器用于定时写入Redis。
```java
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
public class Producer {
private List<String> messageList;
private int messageCount;
private Timer timer;
public Producer() {
messageList = new ArrayList<>();
messageCount = 0;
timer = new Timer();
}
public synchronized void handleMessage(String message) {
messageList.add(message);
messageCount++;
if (messageCount >= N) {
writeMessageList();
} else {
startTimer();
}
}
private void startTimer() {
timer.cancel();
timer = new Timer();
timer.schedule(new TimerTask() {
@Override
public void run() {
writeMessageList();
}
}, M * 1000);
}
private void writeMessageList() {
if (!messageList.isEmpty()) {
// 将消息写入Redis
RedisUtils.writeMessageList(messageList);
messageList.clear();
messageCount = 0;
}
}
}
```
2. 对于Redis的操作,我们可以使用Redisson来简化代码:
```java
import org.redisson.Redisson;
import org.redisson.api.RList;
import org.redisson.api.RedissonClient;
import org.redisson.client.RedisConnectionException;
import org.redisson.config.Config;
public class RedisUtils {
private static RedissonClient redissonClient;
private static RList<String> messageList;
static {
Config config = new Config();
config.useSingleServer().setAddress("redis://127.0.0.1:6379");
redissonClient = Redisson.create(config);
messageList = redissonClient.getList("message_list");
}
public static void writeMessageList(List<String> messages) {
try {
messageList.addAll(messages);
} catch (RedisConnectionException e) {
// 处理Redis连接异常
}
}
}
```
3. 在实际应用中,我们可以使用线程池来处理消息,以提高并发性能:
```java
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class MessageHandler {
private static final int THREAD_POOL_SIZE = 10;
private static ExecutorService executorService = Executors.newFixedThreadPool(THREAD_POOL_SIZE);
private static Producer producer = new Producer();
public static void handleMessage(String message) {
executorService.submit(() -> {
producer.handleMessage(message);
});
}
}
```
4. 在调用方代码中,直接调用MessageHandler.handleMessage(message)来处理消息即可。