ACTIVEMQ This open source messaging server provides multi-lingual support, in addition to the General Java client, you can also use the C + +, PHP, Python, JavaScript (Ajax) and other languages to develop the client. Recently, because of project needs, we need to provide PHP and Python theme subscription client. Here, as a summary, lists the simple installation and use of the client for both languages.For PHP and Python, you can communicate with the m
We've learned how to deploy ACTIVEMQ in the front,We know that the task queue can be viewed through a management background in ACTIVEMQ.TodayUsing PHP to manipulate ACTIVEMQ, we can use a third-party extension.Download:require fusesource/stomp-php:2.0.*Then create a new test.php:require __DIR__.‘/vendor/autoload.php‘; //引入自动加载的文件$connect = new \FuseSource\Stomp\Stomp(‘tcp://10.211.55.13/:61613‘);$connect->c
Brief Introduction
Actual combat one, the actual combat two introduced the basic concept and the configuration way of ACTIVEMQ.
This article introduces a way to use spring to send, consume topic, queue type messages. Do not understand the topic and queue of Google.
As shown in the illustration, topic and queue represent a topic and a queue message channel respectively. Topicmessageproducer sends messages to topic, Topicconsumera and Topicconsumerb
logic
The following shows the encoding template for JMS:
Send side:
Java code publicclassqueuesender{ publicstaticvoidmain (String[]args) throws jmsexception{ Connectionfactoryfactory=newactivemqconnectionfactory ("tcp://localhost:61616");//Here for simplicity, A JMS implementation that relies on ACTIVEMQ. In a real-world program, you can find factory through Jndi lookups, which completely avoids associating specific JMS implementations. a
The directory after ACTIVEMQ is extracted as follows:
Each directory is described as follows: Bin:activemq's startup script conf:activemq all profile data: Log file and persistent message DOCS:ACTIVEMQ official documentation EXAMPLES:ACTIVEMQ the official demo LIB:ACTIVEMQ Run the required library WEBAPPS:ACTIVEMQ Web console WEBAPPS-DEMO:ACTIVEMQ WebApps related demo ACTIVEMQ-ALL-5.13.2.JAR:ACTIVEMQ CLI ja
ACTIVEMQ Number of servers: 3 (3 copies)Activemq-a (consumer), Activemq-b (producer, consumer), Activemq-c (producer, consumer)Modifying a configuration fileModify the files in the Activemq-a (port number 8161 and 61616, this is the default), modify the Activemq.xml in the
RabbitMQ, ACTIVEMQ, and ZEROMQ are excellent messaging middleware, but which of our options is better for our project? Many developers face this annoyance. Below I will make a comparison of the three message middleware, after you have seen it.RABBITMQ is a leading implementation of the AMQP protocol that implements the broker architecture, meaning that messages can be queued on the central node before they are sent to the client. This feature makes RA
Activemq startup is very simple.Such as1. Booting from a binary release packageOn Windows:CD [ACTIVEMQ_INSTALL_DIR]BIN\ACTIVEMQ Start2. Start from source mode650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M00/83/F7/wKioL1eCJReRNI5JAAA6BdItzjs378.png "title=" 111. PNG "alt=" Wkiol1ecjrerni5jaaa6bditzjs378.png "/>Main Class:org.apache.activemq.console.MainArguments:start Xbean:activemq2.xmlOne of the
Deployment configuration details for distributed ActiveMQ clusters:Official information: http://activemq.apache.org/clustering.htmlBasically look at this is enough, this article does not specifically analyze the configuration file.1.Queue consumer clusters:The same queue, if a consumer fails, the unacknowledged message is sent to the other queue's on the consumer. If a consumer processes messages faster, it will process more messages. The Queue cons
RabbitMQ, ACTIVEMQ, and ZEROMQ are excellent messaging middleware, but which of our options is better for our project? Many developers face this annoyance. Below I will make a comparison of the three message middleware, after you have seen it.RABBITMQ is a leading implementation of the AMQP protocol that implements the broker architecture, meaning that messages can be queued on the central node before they are sent to the client. This feature makes RA
ActiveMQ-cpp client application exited abnormallyThe author uses ActiveMQ as the server for message distribution in the system. The Java Web program reads the database real-time records as the Producer, and the receiving end is the client program developed by C ++ Builder. It is resident in the lower right corner of the client, the pop-up window displays real-time messages. During the test, it is found that
When activemq is used in Android projects, an error is reported.
The reason should be: the class you are about to use calls another class, and this class calls other classes. This relationship may have many layers. During this call, the missing package of a class will cause the above error.
Cannot be called. Http://www.blogjava.net/zJun/archive/2007/10/16/153374.html)
Read an article about how to use activemq
, you will cause a memory leak. This was discovered when I was testing it. Originally thought closed connection, the session generated by this connection will also be automatically closed, the result is not the case, the session did not close, resulting in memory leaks. So be sure to explicitly close the connection and session.
1.5 to the session to do object pool
Do object pooling for session, not connection. Session is also an expensive object, and each use is new and closed, at a very high pr
Security
ACTIVEMQ supports pluggable security mechanisms for switching between different provider. For example, JAAS authentication Plugin,custom authentication Implementation,authorization PluginThe following is an example of Jaas authentication plugin.
The Jaas authentication plugin relies on the standard JAAS mechanism to implement authentication. In general, you need to configure the login modules configuration file by setting the Java.security.au
Reprint please indicate the source: http://blog.csdn.net/l1028386804/article/details/75246853
ACTIVEMQ has support for both transactions, JMS transactions-the commit ()/rollback () methods on a session (which are like doing commit ()/Rollbac K () on a JDBC connection) XA Transactions-where The xasession acts as a XAResource by communicating and the message Br Oker, rather like a JDBC Connection takes place in an XA transaction through communicating w
The problems and solutions of the single machine affairs of Taobao's mass storage
http://blog.csdn.net/jiao_fuyou/article/details/15499261
This article is quite good. Core keywords: idempotent.
Message Queue Activemq:redeliver, how to do the retry mechanism does not result in a piece of information being executed multiple times. Http://stackoverflow.com/questions/4934386/avoiding-duplicated-messages-on-jms-activemq this inside mentioned two. One is
Internet architect Video Lesson Dubbo ActiveMQ Spring Netty MongoDB JVM===================================================================2016 Netty/mina/java nio Video tutorial Java game Server Design tutorialInternet Architect Tutorial: http://blog.csdn.net/pplcheer/article/details/71887910Required add qq:1225462853, note: Programmer learning VideoOther videos can be requested (Netty NET C + +, etc.)==================================================
-3.3.6.tar.gz
and then unzip:
TAR-XVF zookeeper-3.3.6.tar.gz-c/opt/amqbroker (path to be unzipped)
Modify Profile:
zoo_sample.cfg Modify file name Zoo.cfg
Modify the Zoo.cfg configuration file content to
ticktime=2000
initlimit=10
synclimit=5
datadir=/opt/amqbroker/zookeeper/data
datalogdir=/opt/ Amqbroker/zookeeper/log
clientport=2181
server.one=192.168.0.100:2888:3888
server.two= 192.168.0.101:2888:3888
server.three=192.168.0.102:2888:3888
Then create the myID file in the/op
In the development process encountered a activemq deadlock problem, painful experience:
scenario: background processes (Appserver1) constantly generate tasks, send to queue front application (appservers) requests, get messages to the queue, and retrieve corresponding data according to the message.
question:
multithreading to the same queue directly call receive, receive messages, the queue will be locked:
The information on the server side dump is as
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