GpsDataBuffer.java
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package com.bsth.client;
import com.bsth.Application;
import com.bsth.entity.GpsEntity;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.TimeUnit;
/**
* 定时定距数据
*/
@Component
public class GpsDataBuffer implements CommandLineRunner {
static ConcurrentLinkedQueue<GpsEntity> linkedList = new ConcurrentLinkedQueue();
static final int MAX_SIZE = 4000 * 20;
static int size = 0;
static Logger logger = LoggerFactory.getLogger(GpsDataBuffer.class);
public void put(GpsEntity gps) {
try {
if(null == gps)
return;
linkedList.add(gps);
size++;
} catch (Exception e) {
logger.error("", e);
}
}
public static List<GpsEntity> pollAll() {
List<GpsEntity> rs = new ArrayList<>(300);
GpsEntity gps;
while (true) {
gps = linkedList.poll();
if (gps == null) {
size = 0;
break;
}
rs.add(gps);
}
//logger.info("poll size: " + rs.size() + " -current size: " + size);
return rs;
}
/**
* 清理数据，保持最大 MAX_SIZE 个数的元素
*/
public static void clear() {
if (size <= MAX_SIZE)
return;
int len = size - MAX_SIZE;
for (int j = 0; j < len; j++) {
linkedList.poll();
size--;
}
logger.info("clear size: " + len + " -current size: " + size);
}
@Autowired
BufferSizeCheck bufferSizeCheck;
@Override
public void run(String... args) {
Application.mainServices.scheduleWithFixedDelay(bufferSizeCheck, 60, 30, TimeUnit.SECONDS);
}
@Component
public static class BufferSizeCheck extends Thread {
@Override
public void run() {
GpsDataBuffer.clear();
}
}
}