In a JBoss environment (specifically EAP 6) with several JARs deployed, several data sources, a lot of system properties, etc. How can I find what a particular JAR users?
For example, is there anyway I can see that "deployment-1.jar" uses "datasource-1" "system-property-2" and "system-property-5"?
What about the reverse? Eg finding out which deployments use a particular datasource?
Note: I'm looking at this from the perspective of an App Admin, maintaining a production system without necessarily having access to the source code.
Related
I'm trying to find the best way to grammatically determine if my program is running on Jboss 5 or Jboss 7 (eap-6.1). The ways I've been finding so far are jboss 5 or jboss 7 specific, which doesn't work because the code has to work in both. Tried both solutions from here: How do I programmatically obtain the version in JBoss AS 5.1? and they didn't work. One complained about org.jboss.Main not existing in jboss 7, the other complained aobut not finidng "jmx/rmi/RMIAdaptor".
The only way I can see is to do Class.forName to look for "org.jboss.Version" (should be found if jboss 5) and if that fails, do Class.forName "org.jboss.util.xml.catalog.Version" (jboss 7). But that seems like a terrible idea.
The reason I need to know if the war is running on jboss 5 or 7 is because there are some custom files that are located in different places in both. So it's like "if jboss 5, execute this piece of code, if jboss 7 execute the other.
Ok i just saw what the problem is.
I would suggest you to think about design issues/refactoring of your software.
If you want to provide your software within different environments, seperate your logic from
technology dependencies.
Build facedes and interfaces to meet environmental requironments.
In my oppionen thats much better as to think we must support all integration platforms and support all there versions. This is completely impossible.
So decouple your business logic and offer specific interfaces. These interfaces (adapters) are much simplier to implement and to maintain.
Hope it helps.
UPDATE DUE TO COMMENT.
I think a solution is for servers 4 to 6 is to use
the MBean Server of JBoss to lookup the registered web application
which is associated to the deployed WarFile.
I suggest first to lookup the registered MBean of the web application manually using the JBoss jmx-console. The name of the WebApplication should be found under the capital "web" or "web-deployment" within the jmx-console.
If you found that name you can implement an own jmx based lookup mechanism
to check for that name.
Here is an Tutorial: pretty old but i think it gives you an idea how to do.
There must be more tutorials for this problem:
http://www.theserverside.com/news/1364648/Using-JMX-to-Manage-Web-Applications
Within JBoss 7 i just can give you the hint that its architecture is based on OSGI. So to lookup for other services you should have a look to this mechanism.
In any case you don't have direct access to the file system and the deployment directory
from an application which is deployed within a JEE container, except of
using the mechanisms provided by the container. JNDI Lookup, JMX ManagedBean mechanism, Java Connector Archicture (JCA) (makes no sense in your case)
It's not an answer just an suggestions since the implementations are completely different
One way could be to use the "interceptors" which are executed during bootstrap and before any ejb invocation and there you have access to the invocation context in other words ejb container.
I can't give you any example but this would be an access point to start.
Another accesspoint is to check for system wide JMX Beans by looking through the
Adminstratore console of the JBoss Server.
You can inject JMX Bean state into your application through the Context Mechansim.
Take a look from Version 4 to 6 at the JMX Managed Bean mechanism. The JMX Achitecture is the main concept of JBoss 3 to 6, so at this point you can influence and maintain the JBoss behaviour.
Aditionally i think you have differences from 4 to 6.x version and 7.0 because since
7 it's a completely new architecture. Since 7.0 the JMX architecture doens't exists anymore.
As mentioned in the article https://community.jboss.org/wiki/DataSourceConfigurationInAS7 JBoss 7 provides 2 main ways to configure a data source.
What is the BEST practice of configuring a data source in JBoss 7 AS ? Is it
As a module?
As a deployment?
(The same question has been asked in the thread https://community.jboss.org/thread/198023, but no one has provided an acceptable answer yet.)
The guide JBoss AS7 DS configuration says the recommended way is to configure the datasource by deployment
But according to discussion on the link Jboss 7 DS configuration JBoss Community Discussion on page 54 of the guide it mentions that the recommended way to deploy JDBC driver is to use modular approach
But I personally say that the better(not the best) approach to configure JDBC driver would be to use modules because of 3 reasons
JDBC driver will generally not change.
Re-usability : You can use the same module across various applications and not deploy the jar along with each application, this prevents duplicacy
Space Effective : Using the module approach lets you reduce the size of your EAR/WAR as you do not need to supply the jar with the package
Hence I would argue that the better of the two approaches is via modules
#Mukul Goel
It's not necessary to include it the EAR of your application it's sufficient to put the .jar inside the deployments folder so:
no need to embed in ear
no need to create a module
Jist deploy in deployments folder or via admin console
I am trying to use maven profiles and filtering in order to produce two different versions of a given web archive (war):
A first one for local deployment to my local machine on localhost
A second one for remote deployment to cloudfoundry
There are a number of properties that differ according to whether the app is deployed to my local machine or to cloudfoundry.
Of course the difficult bit is that I am trying to do all this from STS/Eclipse and deploy from Eclipse to my local tomcat and to cloudfoundry...
Can anyone please provide advice, tips or suggestions?
If you are using Spring versioning 3.1+ the "profile" attribute for <beans> in the spring bean configuration xml would be the best choice. Take a look at the doc here: http://docs.cloudfoundry.com/frameworks/java/spring/spring.html#using-spring-profiles-to-conditionalize-cloud-foundry-configuration
Basically you need to specify at least 2 elements. One for your local properties (profile="default") and one for the properties when deployed to CF. The latter one should be defined as <beans profile="cloud">. When running locally the properties within "cloud" would be ignored and properties in "default" will take effect. When pushed to CF, CF will detect the profile named "cloud" and, which is better, inject corresponding datasource connection info of the services provisioned by CF itself. You can find the detailed CF-specified properties in that doc as well.
For more information about the profile attribute, see the doc here: http://blog.springsource.com/2011/02/11/spring-framework-3-1-m1-released/
Consider having a single project per artifact generated. Hence one project generating your local deployment and one project generating your cloudfoundry deployment.
Overlays (http://maven.apache.org/plugins/maven-war-plugin/overlays.html) is the officially sanctioned way to bake in extra files in an existing WAR file, giving a new WAR artifact. Very useful but may be too slow for comfort while developing.
I was using Jboss 6 . I am wondering to see jboss 7 which does not have many folders that jboss 6 had. It will be helpful if someone explains the difference between the jboss 7 stand alone server and the previous versions.
AS7 is different in a lot of respects to its predecessors AS6,5. So it wont be possible to list down all the differences here.
to list supported technology related differences, refer to below table.
Some Major Differences: (Thanks for #Jyore for additions)
Modular (on-demand) class-loading
Addition of domain managed nodes (multiple JVM management)
All configuration is done in Standalone.xml for standalone mode and domain.xml for domain mode.
About the new DIRECTORY Structure
configuration : Configuration files for the standalone server that runs off of this installation. All configuration information for the running server is located here and is the single place for configuration modifications for the standalone server.
data :Persistent information written by the server to survive a restart of the server
deployments: End user deployment content can be placed in this directory for automatic detection and deployment of that content into the server's runtime.
NOTE: The server's management API is recommended for installing deployment content. File system based deployment scanning capabilities remain for developer convenience.
lib/ext : Location for installed library jars referenced by applications using the Extension-List mechanism
log : standalone server log files
tmp : location for temporary files written by the server
Apart from that I really dont want to duplicate information on web
There is a migration guide from AS5,AS6 to AS7. This can help you understand what are the config changes that are generally required to switch to AS7. it also points out what has significantly changed, highly recommend going through it.
Also You can read Getting Started with AS7, to know AS7 better
I have an issue in Glassfish regarding dealing with properties wehn setting up a web application We are moving from using Jetty to a clustered environment setup with GlassFish on Amazon AWS
Conventionally speaking when dealing with Servlets you are meant to use a .properties file when you want to parse in environment variables, however this causes issues when you use a distributed environment (you would have to place the .properties file in every cluster node). GlassFish has the ability to configure properties of the web container through their Admin Console, which means the properties would automatically distribute through the cluster
The problem is, I am getting random behavior regarding retrieving the variables. The first time I ran a test application, I couldn't retrieve the variables, however no it no longer works
Basically I am setting the environment variables through the admin UI. Under Configurations there are 3 configuration stetings, one for the cluster (usually named .config), one default-config and one server-config. Under Web Container, I have put a test property in all 3 of the called "someVal".
I then created a quick Scalatra app in Scala (which uses Servlet 2.5) and I used this line to attempt to get the properties
getServletContext.getInitParameter("someVal")
Any ideas what I am doing incorrectly, it always returns null?
Update
It appears what I was attempting to do isn't the "correct" way of doing things. So my question is, what is the standard way of providing specific application settings (outside of the .war and outside of runtime) when dealing with clusters in GlassFish. myfear stated that using a database is the standard approach, however I use these configuration settings themselves to define the JDBC connection
I got it. You are referring to the Web Container Settings
http://docs.oracle.com/cd/E18930_01/html/821-2431/abedw.html
I'm afraid that this never has been thought of as providing application specific configuration and I strongly believe that you will never be able to access those properties from the servlet context.
So, you could (should) use the servlet init params in web.xml if you are talking about application specific information. if you use
getServletContext().setInitParameter("param", "value");
you might be able to set them (at least for the runtime of the application). I'm not sure about cluster replication here. The normal way would be to have you configuration settings in the database.