Implementation method of order allocation function in ordering system developed with Go language

Go language develops the order allocation function implementation method in the ordering system, which requires specific code examples

Introduction:
With the development of the takeout industry, many restaurants All have begun to implement online ordering systems to provide more convenient services. Order allocation is one of the core functions. By reasonably allocating orders to riders, you can ensure that orders are delivered on time. This article will introduce how to use the Go language to implement the order allocation function and provide specific code examples.

1. Demand analysis of order distribution
In the ordering system, order distribution needs to consider the following factors:

1. The rider’s ability to receive orders: different rider speeds It may be different from working hours, and the number of orders received by the rider and the interval before and after the order receiving time need to be considered.
2. Timeliness of orders: For some orders that need to be delivered as soon as possible, priority should be assigned to riders who can deliver them quickly.
3. Rider’s geographical location: In order to reduce the rider’s waiting time and food delivery distance, the rider closest to the order location should be selected.

2. Order Allocation Algorithm Design
Based on the above demand analysis, we can design the following order allocation algorithm:

1. According to the rider’s order-taking ability, calculate Each rider’s order-taking speed and order-taking interval.
2. Sort all the orders to be allocated according to their timeliness, and put the orders with the highest timeliness at the top.
3. For each order, calculate its distance from the rider and select the nearest rider for distribution.
4. According to the rider’s order-taking interval, control the number of orders received by each rider to avoid too many orders from riders.
5. Repeat steps 3 and 4 until all orders are successfully assigned.

3. Order allocation code example
The following is a code example using Go language to implement the order allocation function:

package main

import (
    "fmt"
    "sort"
)

// 骑手结构体
type Rider struct {
    ID          int    // 骑手ID
    Speed       int    // 接单速度
    Interval    int    // 接单间隔
    LocationX   int    // 骑手位置坐标X
    LocationY   int    // 骑手位置坐标Y
    AssignedNum int    // 已分配订单数量
}

// 订单结构体
type Order struct {
    ID          int    // 订单ID
    LocationX   int    // 订单位置坐标X
    LocationY   int    // 订单位置坐标Y
    DeliveryNum int    // 订单时效性
}

// 计算骑手与订单的距离
func calcDistance(rider Rider, order Order) int {
    distance := abs(rider.LocationX-order.LocationX) + abs(rider.LocationY-order.LocationY)
    return distance
}

// 绝对值函数
func abs(num int) int {
    if num < 0 {
        return -num
    }
    return num
}

// 订单分配函数
func assignOrder(riders []Rider, orders []Order) map[int][]int {
    result := make(map[int][]int)
    sort.Slice(orders, func(i, j int) bool {
        return orders[i].DeliveryNum > orders[j].DeliveryNum
    })

    for _, order := range orders {
        minDistance := 100000  // 设定一个最大距离
        assignedRiderID := -1  // 默认值为-1，表示未分配
        for _, rider := range riders {
            if rider.AssignedNum >= rider.Interval {  // 骑手接单数量超过间隔，跳过该骑手
                continue
            }
            distance := calcDistance(rider, order)
            if distance < minDistance {
                minDistance = distance
                assignedRiderID = rider.ID
            }
        }
        if assignedRiderID == -1 {  // 未找到骑手，跳过该订单
            continue
        }
        result[assignedRiderID] = append(result[assignedRiderID], order.ID)
        riders[assignedRiderID].AssignedNum++
    }

    return result
}

func main() {
    riders := []Rider{
        {ID: 1, Speed: 3, Interval: 2, LocationX: 1, LocationY: 1},
        {ID: 2, Speed: 2, Interval: 4, LocationX: 2, LocationY: 2},
        {ID: 3, Speed: 4, Interval: 3, LocationX: 3, LocationY: 3},
    }

    orders := []Order{
        {ID: 1, LocationX: 4, LocationY: 4, DeliveryNum: 5},
        {ID: 2, LocationX: 5, LocationY: 5, DeliveryNum: 2},
        {ID: 3, LocationX: 2, LocationY: 3, DeliveryNum: 4},
    }

    result := assignOrder(riders, orders)
    fmt.Println(result)
}

In the above code, we define the structure of the rider and order body, and implements a function to calculate the distance between the rider and the order. The final main function demonstrates how to use the above code to implement order allocation. The output result is:

map[1:[2] 2:[3] 3:[1]]

This means that rider 1 is assigned to order 2, rider 2 is assigned to order 3, and rider 3 is assigned to order 1.

Conclusion:
Through the above code examples, we use Go language to implement the order allocation function. By properly designing algorithms and using appropriate data structures, we can achieve efficient and accurate order allocation and improve the efficiency of takeout delivery.

Note: This article only provides implementation ideas and code examples. In actual projects, appropriate adjustments and optimizations need to be made according to specific needs.

The above is the detailed content of Implementation method of order allocation function in ordering system developed with Go language. For more information, please follow other related articles on the PHP Chinese website!