Remark: This handler must be installed (How to install new features).

There is now a new version named AMQPTransportHandler, it works the same but is now part of the core system.

Important: If you want to use this handler e.g. to send csv data to Odysseus, use CSV protocol handler and send csv-values with a trailing "\n", as the CSV handler needs this! e.g. "9,7,Blue,98.3\n"

This transport handler allow to send and receive object via the AMQP protocol, implemented with RabbitMQ (see http://www.rabbitmq.com/). Further parameter information can be found here: http://www.rabbitmq.com/api-guide.html

Options

  • queue_name: The queue to send to or receive from

  • exchange_name: The exchange to publish the message to

  • consumer_tag: The consumer tag

  • host: The host where the server runs

  • port: The port of the server (if not default)

  • username: Username (if required)

  • password: Password (if required)

  • virtualhost: The virtual host (if required)

  • durable (true / false)

  • exclusive (true / false)
  • auto_delete (true / false)

In addition, arbitrary options can be defined. They need to start with the prefix "amqp." which will be removed in the actual argument. Example: ['amqp.x-message-ttl',1000]  will be the argument 'x-message-ttl' with the long value '1000'. 

Example

#PARSER PQL
#RUNQUERY
input = ACCESS({
            transport='AMQP',
            source= 'Receiver',
            wrapper='GenericPush',
            protocol='SimpleCSV',
            datahandler='Tuple',
            options=[
              ['EXCHANGE_NAME','TelCoSim'],
              ['QUEUE_NAME','DataUsage'],
              ['CONSUMER_TAG','Odysseus'],
              ['HOST','localhost'],
              ['ByteOrder', 'Little_Endian'],
              ['csv.delimiter',';']
            ],
            schema=[
              ['TIMESTAMP', 'STARTTIMESTAMP'],
              ['id', 'String'],
              ['volume', 'Long']
            ]                                                                 
          }                                 
        )

See https://git.swl.informatik.uni-oldenburg.de/projects/ODYDATGEN/repos/telcosim/browse/src/main/java/de/uniol/inf/is/telCoSim/Simulation.java how the data is generated for this input queue.

See RabbitMQ use case for an example how to connect external software with Odysseus via RabbitMQ.

Send and Receive with AMQP

Here is a simple example where content is send to an AMQP broker (here RabbitMQ) and received with Odysseus again.

#PARSER PQL
#ADDQUERY
timer = TIMER({PERIOD = 1000, SOURCE = 'timersource'})

SENDER = SENDER({
              transport='AMQP',
              wrapper='GenericPush',
              protocol='csv',
              datahandler='Tuple',
              SINK="SENDER",
              options=[
                ['QUEUE_NAME','nexmark'],
                ['CONSUMER_TAG','bid'],
                ['HOST','localhost']
               ]                        
            },
            timer
          )

Receiver

#PARSER PQL
#REMOVEQUERY A
#QNAME A
#RUNQUERY
input = ACCESS({
            transport='AMQP',
            source= 'Receiver',
            wrapper='GenericPush',
            protocol='csv',
            datahandler='Tuple',
            options=[
              ['QUEUE_NAME','nexmark'],
              ['CONSUMER_TAG','bid'],
              ['HOST','localhost'],
              ['ByteOrder', 'LittleEndian']
            ],
            schema=[['time', 'StartTimestamp']]                                        
          }


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