problem description when broadcasting with the ChannelGroup packet of netty, if there are multiple groups, how should the EventExecutor in the parameter be set when initializing ChannelGroup? Is it a direct GlobalEventExecutor.INSTANCE to make all Cha...
JIM is not defined;at pages record record page lifeCycleMethod onLoad function ReferenceError: JIM is not defined ** * -- * onLoad: function (option) { wx.showLoading({ title: , mask: true }); JIM.login({...
A scenario often encountered in a long-term connection to a server is that if a live broadcast room is hot, suddenly many users enter the room and connect. At this time, the service may be abnormal because the concurrency is too large. How to do overload...
IM chat how to store offline messages if the other person is not online ...
soon after I came into contact with python , I encountered a little confusion when learning class inheritance, as follows: so now I don t understand, has this ever happened to any other seniors? ...
in Vue, keep-alive sets caching or no caching in routing hooks. For example, if there are three routes A, B, C, B, if there are three routes A, B, C, B does not refresh, C does not refresh, and A the code I am looking for on the Internet has no effect ...
my data is placed in the parent component ajax request and then passed to the child component I find that a piece of my sub-component is updated frequently, and sometimes the data is updated when the data does not change, and the comDidM of the sub-...
is that when I was learning Servlet, I saw that there was another way to connect to the database, but I made a mistake in the test. this is what the book says Context ctx = new InitialContext(); DataSource ds = (DataSource)ctx.lookup("java:comp e...
suppose I have a Vuex store: with such a structure https: jsfiddle.net liqi0816...< a> root people: { name } age: { value } gender: { value } this structure actually has dependencies, age and gender depend on people . If people chan...