package org.bigbluebutton.api.messaging;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingQueue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
public class MessageSender {
private static Logger log = LoggerFactory.getLogger(MessageSender.class);
private JedisPool redisPool;
private volatile boolean sendMessage = false;
private final Executor msgSenderExec = Executors.newSingleThreadExecutor();
private final Executor runExec = Executors.newSingleThreadExecutor();
private BlockingQueue<MessageToSend> messages = new LinkedBlockingQueue<MessageToSend>();
public void stop() {
sendMessage = false;
}
public void start() {
log.info("Redis message publisher starting!");
try {
sendMessage = true;
Runnable messageSender = new Runnable() {
public void run() {
while (sendMessage) {
try {
MessageToSend msg = messages.take();
publish(msg.getChannel(), msg.getMessage());
} catch (InterruptedException e) {
log.warn("Failed to get message from queue.");
}
}
}
};
msgSenderExec.execute(messageSender);
} catch (Exception e) {
log.error("Error subscribing to channels: " + e.getMessage());
}
}
public void send(String channel, String message) {
MessageToSend msg = new MessageToSend(channel, message);
messages.add(msg);
}
private void publish(final String channel, final String message) {
Runnable task = new Runnable() {
public void run() {
Jedis jedis = redisPool.getResource();
try {
jedis.publish(channel, message);
} catch(Exception e){
log.warn("Cannot publish the message to redis", e);
} finally {
redisPool.returnResource(jedis);
}
}
};
runExec.execute(task);
}
public void setRedisPool(JedisPool redisPool){
this.redisPool = redisPool;
}
}