.net operation redis list list

One 、List List Overview

Redis List is a simple list of strings , Sort by insertion order . A list can contain at most 232 - 1 Elements (4294967295, Each list exceeds 40 100 million elements ).

Two 、 Use scenarios

Linked lists are widely used , There are many scenarios to obtain the latest data , Such as the following list of fans 、 My collection list 、 Latest news list 、 Ranking List 、 There is time axis data 、 Comment system of Weibo 、 The messaging 、 Parallel to serial 、 Message queue 、 Keep a log, etc .

3、 ... and 、.NET operation

1、 Add in sequence

string listid = "kgxk_list";
var litaibai = new UserInfo() { Id = 1, Name = " Li Taibai " };
client.AddItemToList(listid, JsonConvert.SerializeObject(litaibai));
var jiaxu = new UserInfo() { Id = 2, Name = " Jia Xu " };
client.AddItemToList(listid, JsonConvert.SerializeObject(jiaxu));

2、 stay list The last additional value

var liubei = new UserInfo() { Id = 1, Name = " Liu bei " };
client.PushItemToList(listid, JsonConvert.SerializeObject(liubei));

3、 Set expiration time

string listid = "kgxk_list";
var litaibai = new UserInfo() { Id = 1, Name = " Li Taibai " };
client.AddItemToList(listid, JsonConvert.SerializeObject(litaibai));
var liubei = new UserInfo() { Id = 2, Name = " Liu bei " };
client.PushItemToList(listid, JsonConvert.SerializeObject(liubei));
// Only store one second in memory 
client.ExpireEntryAt(listid, DateTime.Now.AddSeconds(1));
Console.WriteLine(client.GetListCount(listid));
Task.Delay(1 * 1000).Wait();
Console.WriteLine("1 Seconds later ");
Console.WriteLine(client.GetListCount(listid));
// An avalanche   problem ： Instantly a large amount of data disappears -》 A lot of data should not disappear all at once 

4、 Set expiration time Jump the queue （ Rank first ）

var litaibai = new UserInfo() { Id = 1, Name = " Li Taibai " };
client.AddItemToList(listid, JsonConvert.SerializeObject(litaibai));
var jiaxu = new UserInfo() { Id = 2, Name = " Jia Xu " };
client.AddItemToList(listid, JsonConvert.SerializeObject(jiaxu));
var gaunyu = new UserInfo() { Id = 3, Name = " Guan yu " };
// Adding to the right is jumping in line 
client.PrependItemToList(listid, JsonConvert.SerializeObject(gaunyu));
Console.WriteLine(" Jump the queue ");
var caomegndeng = new UserInfo() { Id = 4, Name = " Cao mengde " };
client.PrependItemToList(listid, JsonConvert.SerializeObject(caomegndeng));

5、 Batch addition

client.AddRangeToList(listid, new List<string>() { "001", "002", "003", "004" });
// Read in batches list The elements in 
var lists = client.GetAllItemsFromList(listid);
foreach (var item in lists)
{
   Console.WriteLine(item);
}

6、 obtain key Subscript is star To end Set of values for

client.AddRangeToList(listid, new List<string>() { "001", "002", "003", "004" });
var lists = client.GetRangeFromList(listid, 0, 1);// From the subscript 0 To 1 Value 
foreach (var item in lists)
{
    Console.WriteLine(item);
}

7、list Queue and set operations mq

var litaibai = new UserInfo() { Id = 1, Name = " Li Taibai " };
client.AddItemToList(listid, JsonConvert.SerializeObject(litaibai));
var jiaxu = new UserInfo() { Id = 2, Name = " Jia Xu " };
client.AddItemToList(listid, JsonConvert.SerializeObject(jiaxu));
var gaunyu = new UserInfo() { Id = 3, Name = " Guan yu " };
client.AddItemToList(listid, JsonConvert.SerializeObject(gaunyu));
var caomegndeng = new UserInfo() { Id = 3, Name = " Cao mengde " };
client.PrependItemToList(listid, JsonConvert.SerializeObject(caomegndeng));
// Remove the tail   And return the removed data   Delete first and then give the data 
Console.WriteLine(client.RemoveEndFromList(listid));
foreach (var item in client.GetAllItemsFromList(listid))
{
  Console.WriteLine(JsonConvert.DeserializeObject<UserInfo>(item).Name);
}
// Remove the header and return the removed data 
Console.WriteLine(client.RemoveStartFromList(listid));
foreach (var item in client.GetAllItemsFromList(listid))
{
   Console.WriteLine(JsonConvert.DeserializeObject<UserInfo>(item).Name);
}
// From a list Remove a piece of data at the end of , Add to another list The head of , And return the value of the move 
Console.WriteLine(client.PopAndPushItemBetweenLists(listid, "newlist"));
Console.WriteLine(" The element result of the new queue after the move ");
Console.WriteLine(client.GetItemFromList("newlist", 0));
// Get the desired set element according to the subscript , Do not remove 
var userstr = client.GetItemFromList(listid, 0);
Console.WriteLine(JsonConvert.DeserializeObject<UserInfo>(userstr).Name);
// Modify the result of the current subscript 
client.SetItemInList(listid, 0, "new value");