restarts at D2, the publisher sends M6 and M7. Now S'll receive M4, M5 followed by M6 and M7 and all for future messages. i.e. S would receive all messages from M1. M7. This is the difference between durable and non-durable consuming. If S were a non-durable consumer then it would only has received M1, M2, M3 and M6, M7-not M4 and M5. i.e because the subscription is durable, S would receive every message sent to T whether the Subscriber are running or not. For non-durable topics, only messages
Spring Integrated JMS Usage
The JMS full name Java Message Service, which is used to send messages.
1. Advantages1. Relative RPC achieves the decoupling effect: Decoupling from the Service Interface name (changing the interface name in RPC, the client needs to make modifications), decoupling from the service location (RPC needs to configure the service's network location to use the service),
JMS-based Active MQ message storage, jmsmqI. Message Storage Methods
ActiveMQ supports persistent messages and non-persistent messages in JMS specifications.
Persistent messages are usually used to ensure that messages are consumed by consumers regardless of whether the consumers are online or not. After the message is confirmed to be consumed, it will be deleted from the storage.
Non-persistent messages
Use Apache Flume to read the JMS Message Queuing message and write the message to the Hdfs,flume agent configuration as follows:Flume-agent.conf#name the components in this agentagenthdfs.sources = Jms_sourceAgenthdfs.sinks = Hdfs_sinkAgenthdfs.channels = Mem_channel# Describe/configure The sourceAgentHdfs.sources.jms_source.type = JMS# Bind to all interfacesAgentHdfs.sources.jms_source.initialContextFactor
1: ActiveMQ Zookeeper-based master-slave (LevelDB master/slave) construction and Spring-boot use (http://www.cnblogs.com/yshyee/p/7277801. HTML), the following code is used to send the JMS message:@Service Public class Producer { @Autowired private jmsmessagingtemplate jmstemplate; Public void Final String message) { jmstemplate.convertandsend (destination, message);} }After using JMeter for stress testing, it was found that
Select Activemq.
To establish a simple Maven project, the Pom.xml is as follows:
To create a test class:
Package com.gof.jms.test;
Import javax.jms.Connection;
Import Javax.jms.ConnectionFactory;
Import Javax.jms.DeliveryMode;
Import javax.jms.Destination;
Import Javax.jms.Message;
Import Javax.jms.MessageConsumer;
Import Javax.jms.MessageProducer;
Import javax.jms.Session;
Import Javax.jms.TextMessage;
Import Org.apache.activemq.ActiveMQConnectionFactory;
public class Simplemessagesend
(subscriber). The client sends the message to the topic. Multiple publishers send messages to topic, which the system passes to multiple subscribers. Each message can have multiple consumers There is a time dependency between the Publisher and the Subscriber. Subscribers to a topic (TOPIC) must create a subscription before they can consume the publisher's message and, in order to consume the message, the Subscriber must remain in a running state.Of course, to mitigate this strict time depende
Messagecreator callback to create a text message from a supported session object. Jmstemplate is built by passing connectionfactory references. Optionally, a default constructor and ConnectionFactory are provided and can be used to build instances of the JavaBean type (using a beanfactory or Pojo). Also, consider the base class provided by spring's Jmsgatewaysupport, which provides pre-built bean properties for the JMS configuration.
The Send (Strin
JPA
Java persistence API.
JPA uses JDK 5.0 annotations or XML to describe the ing relationship between objects and Relational Tables, and persistently stores object objects in the database at runtime.
Baidu Encyclopedia: http://baike.baidu.com/view/1036852.htm
JTA
Java transaction API, translated as Java transaction API.
JTA allows applications to execute Distributed Transaction Processing-accessing and updating data on two or more network computer resources. The JTA support of the JDBC driver
model, there are the following concepts:
Theme (Topic),
Publisher (publisher),
Subscribers (subscriber).
The client sends the message to the topic. Multiple publishers send messages to topic, which the system passes to multiple subscribers.? Each message can have multiple consumers? There is a time dependency between the Publisher and the Subscriber . Subscribers to a topic (TOPIC) must create a subscription before they can consume the publisher's message and, in order to
for class two modes in Springboot. But JMS-specific scenarios are between different applications, where producers and consumers are often in different applications. In addition, the message in the above example we send only strings, in fact, can also send the object type of message, can even use Messagecreator custom message conversion, instead of using the Convertandsend method default conversion.Sending messages between multiple applications1. Firs
SPRINGMVC + Mybatis + springsecurity (Permission control to method button) + Rest (service) + Webservice (service) + Quartz (timed dispatch) + Lucene (search engine) + HTML5 Bootstrap + Maven Project to build an absolute open source platformProject Mave Construction, simulation of large-scale Internet architecture, to achieve high concurrency, large data processing, the entire project using customized service ideas, to provide an atomic, modular scheme, the function module is split, can be commo
Today, my colleague asked me how to handle the JMS messages of receive and visible. A little bit ignorant, before the state of the message has never been concerned. In the Weblogic81, we can't see the message in destination, we can only see how many messages there are in the current destination, how many pending are there. And in 92, when we monitor the destination, we can see the specific message, and the message follows a state string. The title of
For many friends, want to be familiar with JMS related development knowledge, online example write is also more chaotic, special manual compiled an example and server configuration, I hope you like, support my
1 JBoss Configuration Queue Message Queue
Open the JBoss installation directory and locate the file Jbossmq-destinations-service.xml file under SERVER/DEFAULT/DEPLOY/JMS
Add the configuration code as
Session session = Connection.createsession (PARAMA,PARAMB);
Parama is set transaction, PARAMB is set acknowledgment mode
Parama values are:
1. True: Support transactions
When true: The value of PARAMB is ignored, acknowledgment mode is set to session_transacted by the JMS server.
2. False: Transaction not supported
When false: The value of Paramb can be one of Session.auto_acknowledge, Session.client_acknowledge, Dups_ok_acknowledge.
Paramb val
The JMS API defines five types of message bodies:
--------------------------------------------------------------------------------------------------------------- ----Stream-The message body of the Streammessage object contains the Java programming language primitive value stream ("Java basic type"). Populate and read sequentially.Map-The message body of the Mapmessage object contains a set of name-value pairs, where the name is a String object and th
Ack_mode Confirm Mode
--------------------------------------------------------------------------------------------------------------- -----The confirmation mode is used to indicate how the session confirms receipt of the message, which needs to be specified when using the connection CreateSession method, and the following four options are included in the JMS session interface· Auto_acknowledge = 1 Automatic ConfirmationThe session automatically confi
Configuring JMS in the Tomcat serverThe project was originally using WebLogic's JMS service and spring's jmstemplate, so the configuration could not modify the code of the message operation in the projectFirst, download activemq Decompression After the start, access to http://localhost:8161/adminDefault account password admin:admin, click queue, create a new queue TestQueue1Second, add context.xml under the
Exception Information:Exception is Java.lang.IllegalStateException:Cannot convert value of type [ Org.springframework.data.redis.connection.jedis.JedisConnectionFactory] to required type [ Javax.jms.ConnectionFactory] for property ' connectionfactory ': no matching editors or conversion strategy found
Because the project needs to integrate Redis and JMS, when the start times are wrong. It is suggested that the interface to implement the class impleme
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