src/main/resources/mapper/PeerMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.g8backend.mapper.PeerMapper">
    <select id="getPeerByPK">
        SELECT * FROM peers
        WHERE peer_id = #{peerId} and info_hash = #{infoHash} and passkey = #{passkey}
    </select>
    <select id="getPeerByInfoHashAndPeerId">
        SELECT * FROM peers
        WHERE info_hash = #{infoHash} and peer_id = #{peerId}
    </select>
    <select id="selectAllInfoHashesWithPeers" resultType="String">
        SELECT DISTINCT info_hash FROM peers
    </select>

    <select id="countRecentActivity" resultType="Long" parameterType="String">
        SELECT COUNT(*) FROM peers
        WHERE info_hash = #{infoHash}
        AND last_activity_time >= DATE_SUB(NOW(), INTERVAL 7 DAY)
    </select>
    <select id="selectByInfoHashList" parameterType="list" resultType="com.example.g8backend.entity.Torrent">
        SELECT * FROM torrents
        WHERE info_hash IN
        <foreach item="item" index="index" collection="infoHashes" open="(" separator="," close=")">
            #{item}
        </foreach>
    </select>
    <update id="updatePeer">
        UPDATE peers
        SET uploaded = #{uploaded}, downloaded = #{downloaded}
        WHERE peer_id = #{peerId} and info_hash = #{info_hash} and passkey = #{passkey}
    </update>
</mapper>