001/*
002 *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
003 *  <p>
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *  <p>
008 *  http://www.apache.org/licenses/LICENSE-2.0
009 *  <p>
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package com.mybatisflex.core.audit;
017
018import java.util.ArrayList;
019import java.util.Collections;
020import java.util.List;
021import java.util.concurrent.Executors;
022import java.util.concurrent.ScheduledExecutorService;
023import java.util.concurrent.TimeUnit;
024import java.util.concurrent.locks.ReentrantReadWriteLock;
025
026/**
027 * 默认的审计消息收集器，其收集消息后，定时通过消息发送器{@link MessageReporter}把消息发送过去
028 */
029public class ScheduledMessageCollector implements MessageCollector, Runnable {
030
031    private final ScheduledExecutorService scheduler;
032    private final MessageReporter messageSender;
033
034    private final List<AuditMessage> messages = Collections.synchronizedList(new ArrayList<>());
035    private final ReentrantReadWriteLock rrwLock = new ReentrantReadWriteLock();
036
037    public ScheduledMessageCollector() {
038        this(10, new ConsoleMessageReporter());
039    }
040
041
042    public ScheduledMessageCollector(long period, MessageReporter messageSender) {
043        this.messageSender = messageSender;
044        this.scheduler = Executors.newSingleThreadScheduledExecutor(runnable -> {
045            Thread thread = new Thread(runnable, "ScheduledMessageCollector");
046            thread.setDaemon(true);
047            return thread;
048        });
049        this.scheduler.scheduleAtFixedRate(this, period, period, TimeUnit.SECONDS);
050    }
051
052
053    @Override
054    public void collect(AuditMessage message) {
055        try {
056            rrwLock.readLock().lock();
057            messages.add(message);
058        } finally {
059            rrwLock.readLock().unlock();
060        }
061    }
062
063
064    @Override
065    public void run() {
066        if (messages.isEmpty()) {
067            return;
068        }
069        List<AuditMessage> sendMessages;
070        try {
071            rrwLock.writeLock().lock();
072            sendMessages = new ArrayList<>(messages);
073            messages.clear();
074        } finally {
075            rrwLock.writeLock().unlock();
076        }
077        messageSender.sendMessages(sendMessages);
078    }
079
080    public void release() {
081        run(); //clear the messages
082        scheduler.shutdown();
083    }
084
085}