introduction of messenger
The concept of messenger comes from the mvvm foundation project.Source codeLater, we found that the Messenger is a good mechanism, and we designed our own messenger based on the actual situation.
As the name suggests, as a behavior transmitter here, messenger is responsible for receiving behavior subscriptions in advance and executing these behaviors as needed, that is, publishing.
Figure 4. Messenger class diagram
From the class diagram, we can see that mess
Message subscription and delivery are designed on the "platform-Application of plug-ins in Software Architecture Design
1.First, describe what is "Platform-Plug-in software design.
As the name implies, "platform-plug-in" is to first establish a platform to provide underlying basic services. Based on this platform, in subsequent development, the platform is directly inserted as a plug-in, this design is flexible and scalable.
For example, our comp
Python implements the redis subscription and publishing function, pythonredis
Redis is a key-value storage system. Similar to Memcached, Memcached supports more storage value types, including string, list, set, and zset) and hash (hash type ). The subscription and publishing system can also be implemented. Let's take a look at how to use redis and python to subscribe and publish,
Import redisclass RedisSubs
Original: SQL Server initializes the subscription with a backupWhen you create a transactional replication, if the publication database is large, the snapshot initialization is used for a long time, and if a problem occurs, it may be reinitialized. Using Backup initialization can save a lot of time, but the database cannot be accessed during the creation of a publication subscription. Use Backup instead of
e-mail marketing, known as an EDM, is an acronym for Email Direct Marketing, a network marketing tool that delivers value information to target users in the form of e-mail, with the prior permission of the user. Mail push is one of the most effective means of interacting with users, so any one platform needs to communicate with users, mail push system is an essential link.
This article mainly explains how to use Drupal to build a mail push system, to achieve user
Tags: blog style account and my BSP tutorial start a dataThere are a lot of tutorials for publishing subscriptions for SQL Server online, but a lot of things are not written in detail, often misleading, and now, according to their own circumstances, new collation:1. Server-sideAnd then the next step,2. Subscribers (FOCUS)Give the server a local alias that is the same as the real server name of the serviceAdd Distribution Agent Security, note that this account and password are consistent with our
...] # Subscribe to one or more patterns, the pattern parameter can contain glob style matches (*,[],?)Psubscirbe news::[ie]t# The behavior of the unsubscribe command is different for each client, REDIS-CLI directly out of the client to unsubscribe, Python and Ruby need to display the execution commandUnsubcribe [channel|[ Channel ...] # Unsubscribe from designated channels and unsubscribe from all subscribed channels if not specifiedPunsubcribe [pattern|[ Pattern ...]] # unsubscribe from the s
Online issuance and subscription of new shares:
(1) purchase procedures for online bidding
The specific procedures for online bidding of new shares are as follows:
1. For new stock bidding, the primary dealer must submit an application to the stock exchange with the approval document of the China Securities Regulatory Commission (CSRC) and organize the application after review. The issuer shall, at least two to five working days prior to the implement
controllable class (named result);
2. Then extend the FN object in Ko.observablearray (Ko.observabelarray's FN overrides the array-related operations, such as remove, push, etc.)
3. Extension of a method through extends (trackarraychanages, see more information on 2.5)
4. Returns the extended result object.
Ko.observablearray = function (initialvalues) {
initialvalues = initialvalues | | [];
if (typeof initialvalues!= ' object ' | |!) (' Length ' in Initialvalues ')
throw new Error (
Concept See also: https://msdn.microsoft.com/zh-cn/library/ms151170.aspx
Push subscriptions
changes can be pushed to subscribers on demand, continuously, or on a schedule. The Distribution Agent or Merge Agent runs at the Distributor.
release requires data to be moved approximately in real time.
High processor overhead on the distributor does not affect performance.
typically used with snapshot and transaction
1. redis subscription publishing IntroductionRedis subscription and publishing is a message communication mode: the publisher (publisher) sends messages, and the subscriber (subscriber) receives messages. Similar to the observer mode in design patterns.The publisher and subscriber use a channel for communication. When a message needs to be sent, the subscriber sends the message to the channel through the pu
Manage users and assigned subscription information on the Office365When it comes to Office365 users, we know that there are two types, one is the global administrative user of online created on Office365, the other is a user who synchronizes the local ad user to online with the dirsync tool. Whether it's a user created online or a user on-premises to online, how we manage user information, how we manage the subscriptions that our users assign, we all
[email protected] ~]# Yum install ntploaded plugins:fastestmirror, Product-id, Search-disabled-repos, Subscription-managerThis system isn't registered to Red Hat Subscription Management. You can use the Subscription-manager to register.Http://mirrors.163.com/centos/%24releasever/os/x86_64/repodata/repomd.xml: [Errno] HTTP Error 404-not foundtrying Other mirror. T
Original: The SQL Server updatable subscription has a row filter in the Synchronous replication removal project without reinitialization of all subscriptions!In synchronous replication of updatable subscriptions, there is a row-filtered Item table, which prompts for reinitialization of all snapshots and applies this snapshot, which causes all subscription databases to be reinitialized.For example, when remo
Concept See also: https://msdn.microsoft.com/zh-cn/library/ms151170.aspx
Push subscriptions
changes can be pushed to subscribers on demand, continuously, or on a schedule. The Distribution Agent or Merge Agent runs at the Distributor.
Typically, data is synchronized continuously or in accordance with a schedule that is frequently repeated.
Publishing requires data to be moved approximately in real time.
High processor overhead at th
Service Broker publishing-subscription (publish-subscribe) Framework (2)
For more information about the publishing-subscription framework, visit the previous article about service broker publishing-subscription (publish-subscribe) Framework (1 ).
Application publisher LogicIn the Stored Procedure sp_publisherservice, implement the entry point of the publisherserv
Log error prompt:Rhsm-complianced:this system is missing one or more valid entitlement certificates. Please run Subscription-manager for more information.Steps:[Email protected] gdm]# Rpm-qa|grep Subscription-managerSubscription-manager-0.95.5.21-1.el5Subscription-manager-gnome-0.95.5.21-1.el5Subscription-manager-firstboot-0.95.5.21-1.el5[Email protected] gdm]# rpm-e su
In the previous article, I have already written about the PTP (point-to-point) mode of the JMS message mechanism. Today I will write about my personal publishing-subscription mode of the JMS message mechanism.
Before reading the text, I would like to explain the features and differences between PTP and publishing-subscription.
Features:
Point-to-Point message model: this model is implemented through a Serve
if you want to apply for Linux kernel maillist Best New application for a mailbox, because the daily volume of mail is very large. Article Summary:1. Subscription method2. Problem recurrence and solutionNote: The format of the message must be in plain text format, and the body must not appear with extra spaces or other characters such as line breaks.1. Subscription method(1) Request a subscriptionsend an e
Redis.clients.jedis.JedisPubSub; public class Redissubscriber extends jedispubsub{private static final Logger log = Loggerfactory.getlogger (REDISSUBSCRI
Ber.class); Gets the message after the subscription is processed public void onMessage (string s, string s1) {//TODO auto-generated Method Stub log.debug ("Message rece
ived,channel:{},msg:{} ", S,S1);
}//Gets the message that is subscribed by expression after processing public void Onpmessage
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