From 6cb3313793bf45e197b3048f0abd2f600bf97bb5 Mon Sep 17 00:00:00 2001
From: alex <alexander.vrabel@proton.me>
Date: Sun, 12 Jul 2026 15:00:16 +0200
Subject: multi exec and discard

---
 pkg/commands/exec.go | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 pkg/commands/exec.go

(limited to 'pkg/commands/exec.go')

diff --git a/pkg/commands/exec.go b/pkg/commands/exec.go
new file mode 100644
index 0000000..a260f69
--- /dev/null
+++ b/pkg/commands/exec.go
@@ -0,0 +1,68 @@
+package commands
+
+import (
+	"errors"
+	"net"
+	"redisClone/pkg/core"
+	"sort"
+)
+
+func Exec(db core.RedisDB, session *ClientSession, conn net.Conn, execArgs []string) interface{} {
+	if session.Queue == nil {
+		return errors.New("EXEC without MULTI")
+	}
+
+	shardMap := make(map[int]*core.Shard)
+	lockedAll := false
+	var sortedIDs []int
+
+	for _, cmdArgs := range session.Queue {
+		cmdName := cmdArgs[0]
+		if cmd, ok := BaseRegistry[cmdName]; ok {
+			if cmd.LocksAll {
+				db.LockAll()
+				lockedAll = true
+				break
+			}
+			for _, key := range cmd.ExtractKeys(cmdArgs) {
+				shard := db.GetShard(key)
+				shardMap[shard.Id] = shard
+			}
+		}
+	}
+
+	if !lockedAll {
+		for id := range shardMap {
+			sortedIDs = append(sortedIDs, id)
+		}
+		sort.Ints(sortedIDs)
+		for _, id := range sortedIDs {
+			shardMap[id].Mu.Lock()
+		}
+		
+		defer func() {
+			for i := len(sortedIDs) - 1; i >= 0; i-- {
+				shardMap[sortedIDs[i]].Mu.Unlock()
+			}
+		}()
+	} else {
+		defer db.UnlockAll()
+	}
+
+	var results []interface{}
+	
+	for _, cmdArgs := range session.Queue {
+		cmdName := cmdArgs[0]
+		if cmd, ok := BaseRegistry[cmdName]; ok {
+			// Capture the result of the command
+			res := cmd.Execute(cmdArgs, db.GetShard)
+			results = append(results, res)
+		} else {
+			results = append(results, "ERR unknown command") 
+		}
+	}
+
+	session.Queue = nil
+
+	return results
+}
\ No newline at end of file
-- 
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