Java EE Overview
and
WebLogic Operations
JEE: Where we are?
2003
2006
2009
2013
OCCAS 5.x
JBoss EAP 6.x
List of JEE6 Specs
Vendors
Topics
JNDI
Cluster-wide timers
JMS
JDBC
Thread
EJB
WLST
Java Naming and Directory Interface
- Look up objects in a network
- API
-
a mechanism to bind an object to a name
-
a directory-lookup interface that allows general queries
-
- SPI
-
LDAP
-
DNS
-
file system
-
Naming
Efficient naming conventions always form a tree (directory).
Interface
Cluster-wide JNDI updates
- The updates need some time to finish.
- It is the cause of JNDI naming conflicts.
- An EJB is un-deployed from the Admin Server;
- Immediately, the EJB is deployed from the Admin Server;
- Got conflicts... because updates on the way;
- Wait some time, the EJB can be deployed successfully!
In-depth Readings
Monitoring
- JNDI is per server
Cluster-wide timers
- Is able to perform load balancing and failover
- Continues to function as long as one cluster member is alive
InitialContext ic = new InitialContext();
commonj.timers.TimerManager jobScheduler =(common.timers.TimerManager)ic.lookup
("weblogic.JobScheduler");
commonj.timers.TimerListener timerListener = new MySerializableTimerListener();
jobScheduler.schedule(timerListener, 0, 30*1000);
// execute this job every 30 seconds
In-depth Readings
Monitoring
Java Message Service
loosely coupled, reliable, and asynchronous
Why need it?
Tightly coupled with synchronous RPC
loosely coupled, reliable, and asynchronous
Point-to-Point
Pub-Sub
Programming Model
Monitoring
JDBC: What is it?
JDBC in WebLogic
Programming Model
Monitoring
What is thread?
Thread
Thread Contentions
WebLogic Scripting Tool
Based on Jython 2.2.1
WLST Recording
WLST Samples
Java EE overview and WebLogic operations
By aclisp
Java EE overview and WebLogic operations
I do not think anyone should use WebLogic today...
