From 56bcff8908a554433c64b37c77cf9efd3d958e74 Mon Sep 17 00:00:00 2001
From: byteblogs168 <598092184@qq.com>
Date: Tue, 25 Jun 2024 00:01:33 +0800
Subject: [PATCH] =?UTF-8?q?=E8=B0=83=E8=AF=95map?=
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---
 pom.xml                                       |   6 +-
 .../snailjob/job/TestMapJobExecutor.java      | 146 ++++++++++++++++++
 2 files changed, 149 insertions(+), 3 deletions(-)
 create mode 100644 src/main/java/com/example/snailjob/job/TestMapJobExecutor.java

diff --git a/pom.xml b/pom.xml
index d4b5773..716b2d1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -44,17 +44,17 @@
         <dependency>
             <groupId>com.aizuda</groupId>
             <artifactId>snail-job-client-starter</artifactId>
-            <version>1.0.0</version>
+            <version>1.1.0-beta2</version>
         </dependency>
         <dependency>
             <groupId>com.aizuda</groupId>
             <artifactId>snail-job-client-retry-core</artifactId>
-            <version>1.0.0</version>
+            <version>1.1.0-beta2</version>
         </dependency>
         <dependency>
             <groupId>com.aizuda</groupId>
             <artifactId>snail-job-client-job-core</artifactId>
-            <version>1.0.0</version>
+            <version>1.1.0-beta2</version>
         </dependency>
         <dependency>
             <groupId>com.googlecode.aviator</groupId>
diff --git a/src/main/java/com/example/snailjob/job/TestMapJobExecutor.java b/src/main/java/com/example/snailjob/job/TestMapJobExecutor.java
new file mode 100644
index 0000000..70528f3
--- /dev/null
+++ b/src/main/java/com/example/snailjob/job/TestMapJobExecutor.java
@@ -0,0 +1,146 @@
+package com.example.snailjob.job;
+
+import com.aizuda.snailjob.client.job.core.dto.MapArgs;
+import com.aizuda.snailjob.client.job.core.executor.AbstractMapExecutor;
+import com.aizuda.snailjob.client.model.ExecuteResult;
+import com.aizuda.snailjob.common.core.util.JsonUtil;
+import com.google.common.collect.Lists;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.Getter;
+import org.springframework.stereotype.Component;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.Random;
+
+/**
+ * 以下是一个统计某电商公司商家的一年的营业额的计算过程
+ *
+ * @author: opensnail
+ * @date : 2024-06-13
+ * @since : sj_1.1.0
+ */
+@Component
+public class TestMapJobExecutor extends AbstractMapExecutor {
+
+    @Override
+    public ExecuteResult doJobMapExecute(MapArgs mapArgs) {
+        MapEnum mapEnum = MapEnum.ofMap(mapArgs.getTaskName());
+        if (Objects.nonNull(mapEnum)) {
+            Map map = mapEnum.getMap();
+            return doMap(map.map(mapArgs), mapEnum.name());
+        }
+
+        // 未找到map的任务，则说明当前需要进行处理
+        String mapResult = mapArgs.getMapResult();
+
+        // 获取最后一次map的信息.
+        MonthMap.SubTask subTask = JsonUtil.parseObject(mapResult, MonthMap.SubTask.class);
+        // 此处可以统计数据或者做其他的事情
+        // 模拟统计营业额
+        int turnover = new Random().nextInt(1000000);
+        return ExecuteResult.success(turnover);
+
+    }
+
+    @Getter
+    private enum MapEnum {
+        MAP_ROOT(new RootMap()),
+        MONTH_MAP(new MonthMap())
+        ;
+
+        private final Map map;
+
+        MapEnum(Map map) {
+            this.map = map;
+        }
+
+        public static MapEnum ofMap(String taskName) {
+            for (final MapEnum value : MapEnum.values()) {
+                if (value.name().equals(taskName)) {
+                    return value;
+                }
+            }
+
+            return null;
+        }
+
+    }
+
+    private static class RootMap implements Map  {
+
+        @Override
+        public List map(MapArgs args) {
+            // 第一层按照商家ID分片
+            // 假设总共有一百万商家 每个分片处理10万商家
+            List<List<Long>> ranges = doSharding(1L, 1000000L, 100000);
+            return ranges;
+        }
+    }
+
+    public static class MonthMap implements Map  {
+
+        @Override
+        public List map(MapArgs args) {
+
+            // 第二层按照月分片
+            // 4个季度
+            List<Long> lists = JsonUtil.parseList(args.getMapResult(), Long.class);
+            List<SubTask> list = new ArrayList<>();
+            for (final Long id : lists) {
+                for (int i = 1; i <= 4; i++) {
+                    list.add(new SubTask(id, i));
+                }
+            }
+
+            return list;
+        }
+
+        @Data
+        @AllArgsConstructor
+        public static class SubTask {
+            // 商家id
+            private Long id;
+
+            // 需要处理的月份
+            private Integer quarter;
+
+        }
+    }
+
+    interface Map{
+        List<Object> map(MapArgs args);
+    }
+
+    public static List<List<Long>> doSharding(Long min, Long max, int interval) {
+
+        if (max.equals(min)) {
+            return new ArrayList<>();
+        }
+
+        // 总数量
+        long total = max - min + 1;
+
+        // 计算分页总页数
+        Long totalPages = total / interval;
+        if (total % interval != 0) {
+            totalPages++;
+        }
+
+        List<List<Long>> partitions = new ArrayList<>();
+        for (Long index = 0L; index < totalPages; index++) {
+
+            // 计算起始点 因为是从min开始所以每次需要加上一个min
+            Long start = index * interval + min;
+
+            // 结算结束点 若最后一个 start + interval - 1 > max 取max
+            // 减一是保证 [start, end] 都是闭区间
+            Long end = Math.min(start + interval - 1, max);
+            partitions.add(Lists.newArrayList(start, end));
+        }
+
+        return partitions;
+    }
+}