I want to make an application like JConsole. Is it possible? If yes, what are the changes need to done at JVM level? I am planning to use Spring-Boot. As per my knowledge, JMX is enabled by default. Do I need to configure anything extra in my Spring-Boot app in order to access the JMXBeans which are exposed by default?
Here I'm not trying to expose any MBean instead I'm trying to access those beans which are already exposed by JVM. How to achieve it?
JConsole is a JMX compliant monitoring and management application. The architecture is quite simple. It's a client-server architecture. Where the client is the Remote application (Example JConsole or the one that you want to build) and the server is the JMX Agent. In your case, you want to build your own client which is possible.
I want to make an application like JConsole. Is it possible?
Yes, it is possible.
If yes, what are the changes need to done at JVM level?
What do you mean by changes at JVM level? You are simply creating a client application that connects to the server (JMX Agent) using a certain protocol. Remote Method Invocation (RMI) is the protocol used by JConsole for the connection to the JMX Agent. If you want to use RMI for communication, you don't have to do anything on the server side. But if you want to use some other protocol for communication, you can define your own Protocol adapter.
As per my knowledge, JMX is enabled by default.
As of Java SE 6 it is. But you can only monitor it locally. For connection from a remote machine, you need to define an RMI port to start listening for incoming connections.
Here I'm not trying to expose any MBean instead I'm trying to access those beans which are already exposed by JVM. How to achieve it?
Please check out the example from this link - Mimicking Out-of-the-Box Management Using the JMX Remote API. It shows you how to create a simple client application that connects to a remote JMX agent and access the MBeans. This should guide you in the right direction.
Related
I have a embedded ActiveMQ instance in my Spring Boot app and I would like to consume a queue on that instance, from another processes or machine.
Is that possible?
Yes, that is definitely possible given the proper broker configuration. It just needs connectors that are bound to network interfaces visible from remote clients.
I have a functioning application using Spring Boot, Rabbit MQ & MySQL DB locally. I'm curious, how I can upload this app to the AWS Environment and get it working seamlessly.
The only part where I'm lost is how to get RabbitMQ in the cloud? Any suggestions?
I see three options for your needs :
Use AmazonMQ managed service. This uses ActiveMQ under the hood, and supports the AMQP protocol (so you can continue to use the RabbitMQ client). Here's an article on how to do it : https://aws.amazon.com/blogs/compute/migrating-from-rabbitmq-to-amazon-mq/.
Use a third-party managed service (such as CloudAMQP). This is similar to the first option, but you can choose a RabbitMQ provider if you wish.
Install RabbitMQ on an EC2 instance and manage it yourself. This is the most flexible option, but it will require more effort on your part and it will probably cost more. I would recommend this option only if you have special requirements that are not met by using a hosted service.
In all cases, I would also recommend to use a messaging library such as Spring Messaging or Apache Camel to isolate your code from your messaging implementation. This will reduce the boilerplate code you need for messaging and allows you to focus on your application logic.
I want to expose some custom application metrics like how many records processed to JMX in mulesoft flow.
My application is spring boot application.
Any idea on how to achieve this?
Thanks & Regards,
Vikas Gite
Using the Default JMX Support Agent
You can configure several JMX agents simultaneously using the element. When set, this element registers the following agents:
List item
JMX agent
RMI registry agent (if necessary) on rmi://localhost:1099
Remote JMX access on service:jmx:rmi:///jndi/rmi://localhost:1099/server
(Optional) Log4J JMX agent, which exposes the configuration of the Log4J instance used by Mule for JMX management
JMX notification agent used to receive server notifications using JMX notifications
(Optional) MX4J adapter, which provides web-based JMX management, statistics, and configuration viewing of a Mule instance
Also you can try below which can directly be configured under the MULE's wrapper.conf (under $MULE_HOME/conf/wrapper.conf) to enable JMX connectivity so that we can use tools like JMC (Java Mission Control), VisualVM, JConsole to pull the JMX attribute values from the Mule Server and the deployed applications -
wrapper.java.additional.<n>=-Dcom.sun.management.jmxremote
wrapper.java.additional.<n>=-Dcom.sun.management.jmxremote.port=9999
wrapper.java.additional.<n>=-Dcom.sun.management.jmxremote.authenticate=false
wrapper.java.additional.<n>=-Dcom.sun.management.jmxremote.local.only=false
wrapper.java.additional.<n>=-Dcom.sun.management.jmxremote.ssl=false
wrapper.java.additional.<n>=-Djava.rmi.server.hostname=<localhost ip>
wrapper.java.additional.<n>=-Djava.rmi.activation.port=9998
Here should be removed with the next incremental value of the java wrapper value and will be the ip of the the Mule runtime host/server
I hope you are looking for this, if not then please post further queries or clarity so that i will help you out.
I can monitor individual SPRING INTEGRATION applications via visualvm changing the command line parameters when starting the JVM (-Dcom.sun.....)
My application has components in multiple jvm's, each of which i can name.
I would like my operational console to connect per server to one JMX service via one port. Then as I add JVM's(services) they are discoverable by the operational console(lets assume its visualvm) by name.
Any help is greatly appreciated
Take a look at Jolokia I believe a single client can connect to multiple agents (you install a jolokia agent on each JVM).
I am new to MDB, so my questions may sound simple.
I implemented an MDB( serving as a Consumer ) using JDeveloper 11.1.7 and built a JAR file using deployment functionality. Now I need to deploy it to WebLogic 10.3 app server. I have several questions:
1) Should I deploy it as a library or as an application?
2) After I successfully deploy and it's in the "RUNNING" mode I assume it should be listening to the particular Queue I specified as a Resource in my MDB implementation. Is that correct?
3) When implementing an MDB all the examples only specify the "destination" but not the "ConnectionFactory". How does it know where to connect to?
Should I deploy it as a library or as an application?
Deploy as an application since the MDB will likely contain business logic specific to the app.
After I successfully deploy and it's in the "RUNNING" mode I assume it
should be listening to the particular Queue I specified as a Resource
in my MDB implementation. Is that correct?
Yes, if your JMS provider is local, specify the name bound in the local JNDI tree for the destination using destination-jndi-name.
When implementing an MDB all the examples only specify the
"destination" but not the "ConnectionFactory". How does it know where
to connect to?
If the MDB is consuming messages from the local WebLogic JMS provider, the container manages configuration for the connections and sessions automatically, so don't set provider-url, initial-context-factory, or connection-factory-jndi-name, unless you have a custom factory to use.
Refer to WebLogic 10.3 documentation for details: