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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 Server Message Queue. The message sender writes messages to the queue, and the message receiver

one consumer per message (Consumer) (that is, once consumed, the message is no longer in the message queue) There is no dependency on time between the sender and the receiver, that is, when the sender sends the message, regardless of whether the recipient is running, it does not affect the message being sent to the queue The recipient needs to answer the queue successfully after receiving the message successfully If you want to send every message will be successfully processed, the

Context.lookup () mode and begins the call, the implementation of JBoss Jndi is to get the object instance from JNP server, serialize it back to local, It is then deserialized locally, and then the class is called locally. Through this mechanism, we can know that the local actually must have bound to the JBoss object instance class, otherwise the deserialization will certainly fail, and the remote communication needs to do is to perform a remote operation, and obtain the corresponding resul

), receiver (receiver). Each message is sent to a specific queue, and the recipient obtains the message from the queue. The queue retains messages until they are consumed or timed out.The characteristics of peer-to Only one consumer per message (Consumer) (that is, once consumed, the message is no longer in the message queue) There is no dependency on time between the sender and the receiver, that is, when the sender sends the message, regardless of whether the recipient is running,

ModeContains three role topics (Topic), publisher (publisher), Subscriber (subscriber). Multiple publishers send messages to topic, which the system passes to multiple subscribers.Features of Pub/sub Each message can have multiple consumers There is a time dependency between the Publisher and the Subscriber. Subscribers to a topic (TOPIC) must creat

card, which lays the foundation for the future development of personal communication. The 2. Base station subsystem (BSS) Base station subsystem is connected to the Mobile Service Switching Center (MSC) in the Network Path System (NSS) to achieve communication connections between mobile users or between mobile users and fixed network users, and to transmit system signals and user information. Of course, the BSS section should be operated and maintained, and the communication connection betwee

official website document of the words, but according to my actual use. The use of Realm.getdefaultinstance () asobservable () will never be dropped using the OnComplete () method, which is a pit, quite deep, and, in the course of use, Call OnNext () multiple times, causing multiple calls in Subscriber.onnext (), which means the interface will be refreshed multiple timesIf you want to take a data, you need to use Filter/first () Query code final Realm Realm = Realm.getdefaultinstance (); obser

the backbone of the broadband technology is not too much involved. The Broadband access network provides the usually-said last-kilometer connection-the connection between the user and the backbone network. In the access network, the current international mainstream and more mature technology, including xDSL technology, HOMEPNA technology, optical fiber access technology, cable technology and wireless Broadband access network technology. These technologies are based on a different hardware env

Demand: In order to accurately monitor the internal state of each server, without affecting the existing business logic, a simple centralized monitoring system for the server needs to be deployed quickly. After consideration, you can use the Redis pub/sub function to implement a monitoring system is very good and appropriate. Of course, we can also pass this to do batch management. Pub/sub is literally the publication (Publish) and Subscription (Subscribe), in Redis, you can set a key value f

procedure required by the system exists (if it does not exist, it needs to be restored):Sp_addextendedproc ' xp_regenumvalues ', @dllname = ' Xpstar.dll 'GoSp_addextendedproc ' Xp_regdeletevalue ', @dllname = ' Xpstar.dll 'GoSp_addextendedproc ' Xp_regdeletekey ', @dllname = ' Xpstar.dll 'GoSp_addextendedproc xp_cmdshell, @dllname = ' Xplog70.dll 'Next, you can use SQL Server Enterprise Manager [Copy]-> right-click to select->[Configure the publishing, subs