• Run Linux on UAM workstation
• Use IntelliJ IDEA

• Get familiar with basic concept of spring application context
• Get familiar with complex JMS Java code

• Comprehensive programming and configuration model
• Dependency Injection
• Aspect-Oriented Programming (transaction management...)
• Support for JDBC, JPA, JMS
• Hello world example

ActivaMQ specific:

• ActiveMQConnectionFactory
• ActiveMQQueue
• ActiveMQTopic Spring specific:
• JmsTemplate
  • connectionFactory
  • send
• SimpleMessageListenerContainer
  • messageListener
  • connectionFactory
  • destination
• MessageCreator

• As a OfferService I want to publish offer on "offerTopic" topic
  • message should contain "buyQueue" for retailers to response (in javax.jms.Message#setJMSReplyTo) and price (Double)
• As a OrderService I want to receive all offers from "offerTopic" topic
• As a OrderService when price in offer is below my max price then I want to send buy message (javax.jms.MapMessage) with quantity and retailerID to queue (from javax.jms.Message#getJMSReplyTo)
• As a BuyService I want to receive all buy messages from "buyQueue"

• Implement pl.edu.amu.dji.jms.lab2.wholesaler.service.OfferService#sendOffer method
• Send map message by using org.springframework.jms.core.JmsTemplate#send(final Destination destination, final MessageCreator messageCreator) with:
  • Implement org.springframework.jms.core.MessageCreator#createMessage
  • Map message should contain
    • Price as a javax.jms.MapMessage#setDouble (use "price" string as a key)
    • OrderQueue as a javax.jms.Message#setJMSReplyTo
• Go to /context.xml
  • Create pl.edu.amu.dji.jms.lab2.wholesaler.service.OfferService bean (set all properties)

• Implement pl.edu.amu.dji.jms.lab2.retailer.service.BuyService#onMessage method
  • Cast message to javax.jms.MapMessage
  • Get price from map message (javax.jms.MapMessage#getDouble, use "price" string as a key)
  • If price is ok (maxPrice.compareTo(price)==1) send order
    • Send order by using org.springframework.jms.core.JmsTemplate#send(final Destination destination, final MessageCreator messageCreator)
    • Use javax.jms.Message#getJMSReplyTo as a destination
    • Implement org.springframework.jms.core.MessageCreator#createMessage
    • Map message should contain
      • retailerID string with getClass().getName() as a value
      • quantity with some double value
• Go to /context.xml
  • Create pl.edu.amu.dji.jms.lab2.retailer.service.BuyService (with buyService as a id)
    • Set all properties
  • Create org.springframework.jms.listener.SimpleMessageListenerContainer
    • Set messageListener property to buyService
    • Set connectionFactory property to connectionFactory
    • Set destination to offerTopic

• Implement pl.edu.amu.dji.jms.lab2.wholesaler.service.OrderService#onMessage
  • Just print quantity and retailerID
• Go to /context.xml
  • Create pl.edu.amu.dji.jms.lab2.wholesaler.service.OrderService bean (with orderService as a id)
  • Create org.springframework.jms.listener.SimpleMessageListenerContainer
    • Set messageListener property to buyService
    • Set connectionFactory property to connectionFactory
    • Set destination to orderQueue

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