In this lab, we will have a look at the statistics, Apache Active MQ is providing us through its web console.
You need to have done Lab 2 and Lab 3 to get statistics, or otherwise published and consumed messages on the broker.
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Click on the name of the broker you created in Lab 1 and scroll a bit down to the Connections section. Here you find the links to the ActiveMQ Web Console. Only the link to the current primary broker will work. Try either link to find out which link is working at this time.
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On the next page, click on Manage ActiveMQ broker and provide the credentials for the user that you entered when creating the broker or in the CloudFormation stack. After a successful login, you are forwarded to the overview page. Here you can find, among others, the information about the brokers up-time and used memory:
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Click on the Queues link in the top navigation bar to get some detailed information about the existing queues and some key information like number of active consumers, number of pending messages, messages enqueued and messages dequeued. This page also provides functions to Purge the entire queue, to Delete a queue or to Send a message to this queue.
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Click on one of the queues, e.g. queue.user1 to browse the queue content. Choose a queue which has some pending messages. On this page you can also Delete individual message, if you have to.
If you don't have a queue with pending messages, just start a sender and send some messages into a queue, as you have done in Lab 2.
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By clicking on one of the messages, you can see the details of the message, including the timestamp when the message was sent, the unique message id and the content of the message. From this page, you can also Delete the message or Copy/Move it into another queue.
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Click on the Topics link in the top navigation bar to get some detailed information about the existing topics and some key information like number of active consumers, messages enqueued and messages dequeued. This page provides also the function to Delete a topic or to Send a message to a topic.
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You may be wondering about the different ActiveMQ.Advisory. topics. Apache Active MQ publishes different kind of events to the different Advisory topics which gives you the ability to react to these events. An example message from the ActiveMQ.Advisory.Producer.Topic.workshop.topicA topic could look like this one:
{
commandId = 0,
responseRequired = false,
messageId = ID:ip-10-0-1-207-33499-1523623744067-1:1:0:0:149,
originalDestination = null,
originalTransactionId = null,
producerId = ID:ip-10-0-1-207-33499-1523623744067-1:1:0:0,
destination = topic://ActiveMQ.Advisory.Producer.Topic.workshop.topicA,
transactionId = null,
expiration = 0,
timestamp = 0,
arrival = 0,
brokerInTime = 1523703346934,
brokerOutTime = 1523703346935,
correlationId = null,
replyTo = null,
persistent = false,
type = Advisory,
priority = 0,
groupID = null,
groupSequence = 0,
targetConsumerId = null,
compressed = false,
userID = null,
content = null,
marshalledProperties = org.apache.activemq.util.ByteSequence@1dfc39d,
dataStructure = ProducerInfo {
commandId = 4,
responseRequired = true,
producerId = ID:c4b301d0e35d-62410-1523703346186-1:1:1:1,
destination = topic://workshop.topicA,
brokerPath = null,
dispatchAsync = false,
windowSize = 0,
sentCount = 0
},
redeliveryCounter = 0,
size = 0,
properties = {
producerCount=1,
originBrokerName=workshop,
originBrokerURL=ssl://ip-10-0-1-207:61617,
originBrokerId=b-4e4bfd69-7b83-4a27-9faf-4684cfa80443
},
readOnlyProperties = true,
readOnlyBody = true,
droppable = false,
jmsXGroupFirstForConsumer = false
}
Browse to the Subscribers, Connections and Network links in the top navigation bar to get additional information about the broker.
By clicking on the Send link in the top navigation bar, you can easily send a message to a queue or topic of your choice.
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Congratulations, you've successfully completed Lab 7! You can move on to Lab 8: Protocol Interoperability