[feat] 新增LPOP，支持Redis7下的列表索引查找，Redis7-版本通过多次LRange遍历实现。close: https://github.com/NewLifeX/NewLife.Redis/issues/137

NewLife.Redis/Queues/RedisReliableQueue.cs

@@ -442,6 +442,7 @@ public class RedisReliableQueue<T> : QueueBase, IProducerConsumer<T>, IDisposabl
 
         // 清理已经失去Status的Ack
         foreach (var key in rds.Search($"{_Key}:Ack:*", 1000))
+        {
             if (!acks.Contains(key))
             {
                 var queue = rds.GetList<String>(key) as RedisList<String>;
@@ -449,6 +450,7 @@ public class RedisReliableQueue<T> : QueueBase, IProducerConsumer<T>, IDisposabl
                 XTrace.WriteLine("全局清理死信：{0} {1}", key, msgs.ToJson());
                 rds.Remove(key);
             }
+        }
 
         return count;
     }

NewLife.Redis/RedisList.cs

@@ -68,11 +68,28 @@ public class RedisList<T> : RedisBase, IList<T>
         // Redis7支持LPOS
         if (Redis.Version.Major >= 7) return LPOS(item);
 
-        var count = Count;
+        var p = 0;
-        if (count > 1000) throw new NotSupportedException($"[{Key}]的元素个数过多，不支持！");
+        var batch = 100;
+        while (true)
+        {
+            var arr = LRange(p, p + batch - 1);
+            if (arr == null || arr.Length == 0) break;
 
-        var arr = GetAll();
+            var idx = Array.IndexOf(arr, item);
-        return Array.IndexOf(arr, item);
+            if (idx >= 0) return p + idx;
+
+            if (p >= 1_000_000) throw new NotSupportedException($"[{Key}]的元素个数过多，不支持遍历！");
+
+            p += batch;
+        }
+
+        return -1;
+
+        //var count = Count;
+        //if (count > 1000)
+
+        //var arr = GetAll();
+        //return Array.IndexOf(arr, item);
     }
 
     /// <summary>在指定位置插入</summary>

XUnitTest/ListTests.cs

@@ -1,5 +1,6 @@
 using NewLife.Caching;
 using NewLife.Log;
+using NewLife.Security;
 using System;
 using System.Diagnostics;
 using System.Linq;
@@ -164,6 +165,38 @@ public class ListTests
         Assert.Equal(vs3[1], item2);
     }
 
+    [Fact]
+    public void List_IndexOf()
+    {
+        var key = "lkey_indexof";
+
+        // 删除已有
+        _redis.Remove(key);
+
+        var rlist = _redis.GetList<String>(key) as RedisList<String>;
+        Assert.NotNull(rlist);
+
+        // 添加
+        var vs = Enumerable.Range(0, 1000).Select(e => Rand.NextString(8)).ToArray();
+        rlist.AddRange(vs);
+        _redis.SetExpire(key, TimeSpan.FromSeconds(60));
+
+        // 索引
+        var idx = rlist.IndexOf(vs[1]);
+        Assert.Equal(1, idx);
+
+        idx = rlist.IndexOf("abcd2");
+        Assert.Equal(-1, idx);
+
+        idx = rlist.IndexOf(vs[321]);
+        Assert.Equal(321, idx);
+
+        var rs = rlist.Contains(vs[456]);
+        Assert.True(rs);
+
+        _redis.Remove(key);
+    }
+
     [Fact]
     public void RPOPLPUSH_Test()
     {