将之前串行处理优化为多线程推送

src/main/java/com/mashibing/mapper/AirMapper.java

@@ -4,6 +4,7 @@ import com.mashibing.entity.Air;
 import org.apache.ibatis.annotations.Param;
 import org.apache.ibatis.annotations.Select;
 
+import java.util.Date;
 import java.util.List;
 
 /**
@@ -15,5 +16,15 @@ public interface AirMapper {
     @Select("select * from air")
     List<Air> findAll();
 
+    // 提供一个查询需要推送数据的SQL总条数
+    @Select("select count(1) from air where monitor_time = #{monitorTime}")
+    long selectCountNeedPush(@Param("monitorTime")String monitorTime);
 
+    // 查询今日第一个需要推送的数据,目的是获取ID方便计算
+    @Select("select id from air where monitor_time = #{monitorTime} order by id limit 1")
+    Long selectOneNeedPush(@Param("monitorTime")String monitorTime);
+
+    // 查询需要推送的数据的内容，基于ID范围去查询。
+    @Select("select * from air where monitor_time = #{monitorTime} and id between #{fromId} and #{toId} order by id")
+    List<Air> selectByIdAndLimit(@Param("monitorTime")String monitorTime,@Param("fromId") long fromId,@Param("toId") long toId);
 }

src/main/java/com/mashibing/service/PushService.java

@@ -1,11 +1,13 @@
 package com.mashibing.service;
 
+import java.util.concurrent.ExecutionException;
+
 /**
  * @author zjw
  * @description
  */
 public interface PushService {
 
-    void pushData();
+    void pushData(String date) throws ExecutionException, InterruptedException;
 
 }

src/main/java/com/mashibing/service/impl/PushServiceImpl.java

@@ -11,6 +11,7 @@ import org.springframework.stereotype.Service;
 import javax.annotation.Resource;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.*;
 
 /**
  * @author zjw
@@ -20,16 +21,72 @@ import java.util.List;
 @Slf4j
 public class PushServiceImpl implements PushService {
 
+    private final int COUNT = 10000;
+    private final int COUNT_ID = 9999;
+
+    private final ExecutorService executor = Executors.newFixedThreadPool(50);
+
+
     @Autowired
     private PushUtil pushUtil;
 
     @Resource
     private AirMapper airMapper;
 
+
+    /**
+     * 多线程推送数据到审核服务
+     */
     @Override
+    public void pushData(String date) throws ExecutionException, InterruptedException {
+
+        // 将数据计算做好。
+        //1.1 获取到今天需要推送数据的总数
+        long totalCount = airMapper.selectCountNeedPush(date);
+        System.out.println(totalCount);
+        //1.2 查询今日需要推送的数据的第一个id
+        Long firstId = airMapper.selectOneNeedPush(date);
+        //1.3 计算投递任务的个数
+        long times = totalCount % COUNT == 0 ? totalCount / COUNT : totalCount / COUNT + 1;
+
+        List<Future<String>> futureList = new ArrayList<>();
+        //1.4 开始计算每个线程推送的数据
+        for (int i = 0; i < times; i++) {
+            // 计算好每次每个线程需要查询的数据范围
+            long fromId = firstId;
+            long toId = firstId + COUNT_ID;
+            firstId = firstId + COUNT;
+            //2.1 基于线程池投递数据
+            Future<String> future = executor.submit(() -> {
+                //2.2 查询当前线程需要推送的数据
+                List<Air> airList = airMapper.selectByIdAndLimit(date, fromId, toId);
+                //2.3 推送数据
+                for (Air air : airList) {
+                    boolean success = pushUtil.push(air);
+                    if (!success) {
+                        // 3.1 代表推送失败，需要落库做好数据的留存，后面该重试
+                    }
+                }
+                log.info("【推送数据】 当前线程推送完毕数据。");
+                return "OK";
+            });
+            futureList.add(future);
+        }
+        for (Future future : futureList) {
+            future.get();
+        }
+        // 3.2 差选推送失败的数据库表的中信息，可以再次尝试推送（这里推送成功的，可以直接删除，失败的继续留存。）
+        CopyOnWriteArrayList<Air> airs = pushUtil.get();
+        System.out.println(airs.size());
+    }
+
+    /*@Override
     public void pushData() {
         long start = System.currentTimeMillis();
+
+        // 推送失败数据
         List<Air> errorData = new ArrayList<>();
+        // 查询需要推送数据。
         List<Air> airList = airMapper.findAll();
         log.info("【推送数据】 推送air数据条数 = {}",airList.size());
         for (Air air : airList) {
@@ -41,5 +98,5 @@ public class PushServiceImpl implements PushService {
         }
         long end = System.currentTimeMillis();
         log.info("【推送数据】 推送air数据条数 = {}，花费时间 = {}",airList.size() - errorData.size(),(end - start) / 1000);
-    }
+    }*/
 }

src/main/java/com/mashibing/util/PushUtil.java

@@ -3,6 +3,8 @@ package com.mashibing.util;
 import com.mashibing.entity.Air;
 import org.springframework.stereotype.Component;
 
+import java.util.concurrent.CopyOnWriteArrayList;
+
 /**
  * @author zjw
  * @description
@@ -10,14 +12,15 @@ import org.springframework.stereotype.Component;
 @Component
 public class PushUtil {
 
+    CopyOnWriteArrayList<Air> list = new CopyOnWriteArrayList();
 
     public boolean push(Air air){
-        try {
+        list.add(air);
-            Thread.sleep(1);
-        } catch (InterruptedException e) {
-            e.printStackTrace();
-        }
         return true;
     }
 
+    public CopyOnWriteArrayList<Air> get(){
+        return list;
+    }
+
 }

src/test/java/com/mashibing/mapper/AirMapperTest.java

@@ -0,0 +1,43 @@
+package com.mashibing.mapper;
+
+import com.mashibing.entity.Air;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import javax.annotation.Resource;
+
+import java.util.List;
+
+import static org.junit.Assert.*;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class AirMapperTest {
+
+    @Resource
+    private AirMapper airMapper;
+
+    @Test
+    public void findAll() {
+    }
+
+    @Test
+    public void selectCountNeedPush() {
+        long count = airMapper.selectCountNeedPush("2024-05-21");
+        System.out.println(count);
+    }
+
+    @Test
+    public void selectOneNeedPush() {
+        Long id = airMapper.selectOneNeedPush("2024-05-21");
+        System.out.println(id);
+    }
+
+    @Test
+    public void selectByIdAndLimit() {
+        List<Air> airList = airMapper.selectByIdAndLimit("2024-05-21", 67, 10066);
+        System.out.println(airList.size());
+    }
+}

src/test/java/com/mashibing/service/PushServiceTest.java

@@ -6,6 +6,8 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.context.junit4.SpringRunner;
 
+import java.util.concurrent.ExecutionException;
+
 import static org.junit.Assert.*;
 
 @RunWith(SpringRunner.class)
@@ -16,7 +18,7 @@ public class PushServiceTest {
     private PushService pushService;
 
     @Test
-    public void pushData() {
+    public void pushData() throws ExecutionException, InterruptedException {
-        pushService.pushData();
+        pushService.pushData("2024-05-21");
     }
 }