subscriber booster

thread tasks under different operating environments. The asynchronous implementation of RxJava is achieved through an extended observer pattern. Observable (observers, or observers) and Subscriber (subscribers) are the two main classes. On RxJava, a Observable is a class that emits a stream of data or an event, and Subscriber is a class that processes (takes action) the emitted items (data streams or event

I. Extended Observer patternThe asynchronous implementation of RxJava is achieved through an extended observer pattern.Observer mode before writing a series of blogs, you can read:http://blog.csdn.net/a910626/article/details/50766019The release subscription model implementation diagram in RX:Observable and subscriber can do anything, your observable can be a database query, subscriber get the query results

Introduction to the Observer pattern:The Observer pattern is also known as the Publish subscription pattern. is a one-to-many dependency, that is, when the state of an object (the message publisher) changes, other objects (subscribers) automatically perform their actions when they receive the message.　　Objects that are involved in this pattern:　1. Message issuer (one)1.1 The message Publisher will first establish an array of notifications arr, which is used to store the

between the coupling, need to obtain the other party, such as an instance, and naturally to find out if there is a solution to the coupling between the library, Eventbus emerged, this is Greenrobot written by the great God, how the classic has no need to say more, GitHub Address: Https://github.com/greenrobot/EventBus, although we will use, but also need to understand the principle of the inside, so the use of the rest assured that, after all, for unfamiliar things do not understand the interna

This series of articles index the "Response Spring's word Wizard"Previously feed-response Flow | Reactor 3 Quick Start | Responsive Flow Specification2.9 ProcessorProcessoris both a special publisher ( Publisher ) and a Subscriber ( Subscriber ). So you can subscribe to one Processor or call the methods they provide to manually insert the data into the sequence, or terminate the sequence.The front has been

powerful, but can cause conflicts and requires special attention to ensure the integrity of the data in each library. Merge Replication: You can merge data from multiple databases and copy them to the target database. For our needs, we have chosen the most simple transactional Replication. Transactional Replication Principle There are 3 roles in transactional replication: publisher (publisher), Distributor (distributor), Subscriber (

programming easier. ZMQ is used for communication between nodes. a node can be a host or a process. III. purpose of this article In the process of providing services to external clusters, we have many configurations that need to be updated at any time as needed. if this information is pushed to each node? And ensures information consistency and reliability? This article attempts to use ZMQ to implement a configuration distribution center based on the introduction of the basic ZMQ theory. From o

The above cobwebs the most important signal mechanism to leave the division. But the various operations in RAC are also essential, and some complex operators are also a combination of basic operations, a bit of the flavor of building blocks.Then I follow the previous thinking, write some simple operators how to achieve.Operation appended Concat (splicing)Concat Use ExampleQhqsignal *demooriginsignal = [qhqsignal createsignal:^ (ID subscriber) {[

of registration is to use method to make an integration.3, all the way to annotate the subscription method (the old version of the Eventbus by the fixed method name tag subscribers)4, most of the same rules, such as the subscription method can only have one parameter.5. Inter-process communication is not applicableDifferent points1, Otto more lightweight, simple structure. Eventbus is a little more complicated.2, Otto by default in the main thread to use, can not be used in other threads, by se

Previously overviewIn the previous article, we introduced the basic use of eventbus and some advanced techniques. This and several subsequent blogs will focus on parsing Eventbus.java to see how the author gracefully implements this seemingly simple event distribution/reception mechanism.This article outlinesProfiling the register process, let's get started!Method signatureThe complete register method is signed as follows, and we usually call the register (this ) in fact the final call to the re

The active Standby pair is a fixed mode of TimesTen replication, which is an active to 1 Standby, and then 0 or 127 subscriber, such as:Configure Active Standby Pair (without cache group)The approximate steps are as follows:1. Create a database2. Create a copy using the creation ACTIVE STANDBY pair3. Call to Call ttRepStateSet(‘ACTIVE‘) set the active database role to Active4. Invoke Call ttRepStart , start the replication agent5. Create a user in the

Label:Replication: Data transfer to other servers to store, do backup.Mirror: The primary server database is hung and the other one is automatically run as the primary server.LOG: a controllable image.Cluster: The primary server is hung, and the other one is automatically run as the primary server, not limited to the database. Details: Quoted http://hi.baidu.com/jaimy_jie/blog/item/6e099ed52f42a4d250da4b24.html One, database replication SQL Server 2008 database replication is a publish/subscribe

Oralce (2) [SQL] // table join query // 1. select s. subscriberno, c. customerid from subscribern s, customer c where s. customerkey = c. customerkey and subscriberno = 'cxm'; // 2. join // select s. subscriberno, c. customerid from subscriber s inner join customer c on s. customerkey = c. customerkey where s. subscrinerno = 'cxm'; // naturally connects to select s. subscriberno, c. customerid from subscriber