package com.ctrip.framework.apollo.biz.message;
import com.google.common.collect.Queues;
import com.ctrip.framework.apollo.biz.entity.ReleaseMessage;
import com.ctrip.framework.apollo.biz.repository.ReleaseMessageRepository;
import com.ctrip.framework.apollo.core.utils.ApolloThreadFactory;
import com.ctrip.framework.apollo.tracer.Tracer;
import com.ctrip.framework.apollo.tracer.spi.Transaction;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;
import java.util.Objects;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.annotation.PostConstruct;
/**
* @author Jason Song(song_s@ctrip.com)
*/
@Component
public class DatabaseMessageSender implements MessageSender {
private static final Logger logger = LoggerFactory.getLogger(DatabaseMessageSender.class);
private static final int CLEAN_QUEUE_MAX_SIZE = 100;
private BlockingQueue<Long> toClean = Queues.newLinkedBlockingQueue(CLEAN_QUEUE_MAX_SIZE);
private final ExecutorService cleanExecutorService;
private final AtomicBoolean cleanStopped;
@Autowired
private ReleaseMessageRepository releaseMessageRepository;
public DatabaseMessageSender() {
cleanExecutorService = Executors.newSingleThreadExecutor(ApolloThreadFactory.create("DatabaseMessageSender", true));
cleanStopped = new AtomicBoolean(false);
}
@Override
@Transactional
public void sendMessage(String message, String channel) {
logger.info("Sending message {} to channel {}", message, channel);
if (!Objects.equals(channel, Topics.APOLLO_RELEASE_TOPIC)) {
logger.warn("Channel {} not supported by DatabaseMessageSender!");
return;
}
Tracer.logEvent("Apollo.AdminService.ReleaseMessage", message);
Transaction transaction = Tracer.newTransaction("Apollo.AdminService", "sendMessage");
try {
ReleaseMessage newMessage = releaseMessageRepository.save(new ReleaseMessage(message));
toClean.offer(newMessage.getId());
transaction.setStatus(Transaction.SUCCESS);
} catch (Throwable ex) {
logger.error("Sending message to database failed", ex);
transaction.setStatus(ex);
} finally {
transaction.complete();
}
}
@PostConstruct
private void initialize() {
cleanExecutorService.submit(() -> {
while (!cleanStopped.get() && !Thread.currentThread().isInterrupted()) {
try {
Long rm = toClean.poll(1, TimeUnit.SECONDS);
if (rm != null) {
cleanMessage(rm);
} else {
TimeUnit.SECONDS.sleep(5);
}
} catch (Throwable ex) {
Tracer.logError(ex);
}
}
});
}
private void cleanMessage(Long id) {
boolean hasMore = true;
//double check in case the release message is rolled back
ReleaseMessage releaseMessage = releaseMessageRepository.findOne(id);
if (releaseMessage == null) {
return;
}
while (hasMore && !Thread.currentThread().isInterrupted()) {
List<ReleaseMessage> messages = releaseMessageRepository.findFirst100ByMessageAndIdLessThanOrderByIdAsc(
releaseMessage.getMessage(), releaseMessage.getId());
releaseMessageRepository.delete(messages);
hasMore = messages.size() == 100;
messages.forEach(toRemove -> Tracer.logEvent(
String.format("ReleaseMessage.Clean.%s", toRemove.getMessage()), String.valueOf(toRemove.getId())));
}
}
void stopClean() {
cleanStopped.set(true);
}
}