The Anypoint Connector for Virtual Machine (VM Connector) facilitates intra-app and inter-app communication via asynchronous queues that are either transitory or persistent:
Persistent queues work by serializing and saving the data on the disc while executing a Mule application in single runtime instance mode. When the Mule program runs in cluster runtime instance mode, the persistent queues are backed up in the memory grid. As a result, when a flow utilizes VM Connector to publish content to a queue, the Mule runtime engine decides whether to process the message in the same origin node or send it to the cluster to choose another node to handle it. The use of a VM Connector makes load distribution easier throughout a cluster.
While using persistent queues, the data you transfer must be serializable in either single or cluster runtime instance mode. Kryo has some limitations, despite the fact that you can enable serialization to acquire a greater set of serializable variables.
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While working with persistent queues, keep the following in mind:
Prerequisites
You should be acquainted with the following before using this connector:
You should have access to Anypoint Studio before you can create an app.
When you need to do the following, use VM Connector:
See the examples provided for connection operations to get the most out of Anypoint Connector for Virtual Machine (VM Connector):
Mule applications, properties, and configuration files can all be designed and updated using Anypoint Studio editors.
For adding and setting up a connector in Studio, follow these steps:
You may see the app log to verify for issues when you run the connection, as explained in View the App Log.
Create a new Mule project in Studio and add and set up the connector there:
Populate the XML automatically by adding VM Connector to your Mule project with the namespace of a connector and schema location and for adding the necessary dependencies to the “pom.xml” file in the project.
When you add a connection to a Mule project in Studio, it isn’t available to other Studio projects.
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A source initiates a flow when a certain condition is met. You might use one of the following input sources with VM Connector:
For example, to configure a VM Listener source, perform these steps:
When you add a connection operation to your flow, you specify the operation that the connector will perform.
Follow these procedures to add an operation to VM Connector:
[Related article: mule connectors]
It's ideal to set a global element that all instances of that connection in the app may utilize when configuring a connector. The queues on which the VM Connector operates are defined by the global configuration of the connector. You may specify as many configurations as you like, each with its own queue sets.
Only activities referencing that specific VM Connector setup can use each queue established within it. A queue name could not be repeated across configurations, and there can't be two queues with the same name in the same app or domain.
Follow these steps to configure the global element for VM Connector:
The screenshot below gives an example of how to configure the VM Connector:
An example of setting the VM queue is shown in the following screenshot:
The VM Connector setup in the XML editor appears like this:
You may look at the app log to see if there are any problems:
You can also view the app log in the default location MULE_HOME/logs/
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This session on VM connector in Mule has now reached its end, after completing the prerequisites and experimenting with templates and examples, you're ready to use Anypoint Studio to develop your app and set up the connector.
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