利用 disruptor DB批量存储

CoreMonitorDataRing：

package com.cloudeye.core.disruptor;


import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeanUtils;


import com.cloudeye.common.bean.monitor.MonitorDataBean;
import com.lmax.disruptor.EventFactory;
import com.lmax.disruptor.RingBuffer;
import com.lmax.disruptor.SleepingWaitStrategy;
import com.lmax.disruptor.dsl.Disruptor;
import com.lmax.disruptor.dsl.ProducerType;


public class CoreMonitorDataRing {
    private final static Logger logger = LoggerFactory.getLogger(CoreMonitorDataRing.class);
    private static CoreMonitorDataRing instance;
    private static int RING_SIZE = 1024 * 8; // 无锁环的大小，可以无覆盖的形式容纳8192个数据
    private RingBuffer ringBufferDB;
    private CoreSaveMonitorDataHandler saveMetricDataHandler; // 负责将监控数据记录至历史数据表的处理类


    public CoreMonitorDataRing() {
        initRing();
    }


    public static CoreMonitorDataRing getInstance() {
        if (instance == null) {
            instance = new CoreMonitorDataRing();
        }
        return instance;
    }


    @SuppressWarnings("unchecked")
    private void initRing() {
        try {
            saveMetricDataHandler = new CoreSaveMonitorDataHandler();
            //BlockingWaitStrategy,SleepingWaitStrategy,YieldingWaitStrategy
            Disruptor disruptorDB = new Disruptor<>(EVENT_FACTORY, RING_SIZE,
                    new LimitedThreadFactory(), ProducerType.MULTI, new SleepingWaitStrategy());
            disruptorDB.handleEventsWith(saveMetricDataHandler);
            ringBufferDB = disruptorDB.start();
        } catch (Exception e) {
            logger.error("init handler fail!", e);
            System.exit(1);
        }
    }


    public void publish(MonitorDataBean metricData) {
        long sequence = ringBufferDB.next();
        try {
            MonitorDataBean ringValue = ringBufferDB.get(sequence);
            BeanUtils.copyProperties(metricData, ringValue);
        } finally {
            ringBufferDB.publish(sequence);
        }
    }


    public final EventFactory EVENT_FACTORY =
            new EventFactory() {
                public MonitorDataBean newInstance() {
                    return new MonitorDataBean();
                }
            };


    public class LimitedThreadFactory implements ThreadFactory {
        private final AtomicInteger count = new AtomicInteger(0);
        public Thread newThread(Runnable r) {
            if (count.compareAndSet(0, 2)) {
                return new Thread(r);
            } else {
                throw new IllegalStateException("Created more that one thread");
            }
        }
    }

}

CoreSaveMonitorDataHandler：

package com.cloudeye.core.disruptor;


import java.util.List;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


import com.cloudeye.common.bean.monitor.MonitorDataBean;
import com.cloudeye.common.util.COMNSpringUtil;
import com.cloudeye.core.service.CoreMonitorDataService;
import com.google.common.collect.Lists;
import com.lmax.disruptor.EventHandler;


public class CoreSaveMonitorDataHandler implements EventHandler {
    
    private final static Logger logger = LoggerFactory.getLogger(CoreSaveMonitorDataHandler.class);
    
    private final static int DB_BATCH_SIZE = 50;
    private final static int RING_BATCH_SIZE = 1024;
    private List cache = Lists.newArrayList();
    
    private CoreMonitorDataService monitorDataService = COMNSpringUtil.getBean(CoreMonitorDataService.class);
    
    @Override
    public void onEvent(MonitorDataBean value, long sequence, boolean endOfBatch)
            throws Exception {
        try {
            saveMetricData(value, sequence, endOfBatch);
        } catch (Exception e) {
            logger.error("Exception ", e);
        }
    }


    private void saveMetricData(MonitorDataBean value, long sequence, boolean endOfBatch) {
        cache.add(value);
        if ((sequence + 1) % DB_BATCH_SIZE == 0) {
            monitorDataService.batchSave(cache);
            cache.clear();
        }
        if (endOfBatch) {
            if ((sequence + 1) % RING_BATCH_SIZE != 0) {
                monitorDataService.batchSave(cache);
                cache.clear();
            }
        }
    }
}