add torrent upload(finished) and tracker announce(unimplemnt)

Change-Id: I017c03df2bc1c40c4a080837821d56dfe58d6eb6
diff --git a/src/main/resources/mapper/TorrentMapper.xml b/src/main/resources/mapper/TorrentMapper.xml
new file mode 100644
index 0000000..9b53d29
--- /dev/null
+++ b/src/main/resources/mapper/TorrentMapper.xml
@@ -0,0 +1,32 @@
+<?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.TorrentMapper">
+    <insert id="insertTorrent" >
+        INSERT INTO torrents (user_id, torrent_name, info_hash, file_size)
+        VALUES (#{userId}, #{torrentName}, UNHEX(#{infoHash}), #{fileSize})
+    </insert>
+
+    <select id="getTorrentByInfoHash" resultType="com.example.g8backend.entity.Torrent">
+        SELECT
+            torrent_id,
+            user_id,
+            torrent_name,
+            HEX(info_hash) AS infoHash,
+            file_size
+        FROM torrents
+        WHERE info_hash = UNHEX(#{infoHash})
+    </select>
+
+    <select id="getTorrentByTorrentId" resultType="com.example.g8backend.entity.Torrent">
+        SELECT
+            torrent_id,
+            user_id,
+            torrent_name,
+            HEX(info_hash) AS infoHash,
+            file_size
+        FROM torrents
+        WHERE torrent_id = #{torrentId}
+    </select>
+</mapper>
\ No newline at end of file