Last day of the training and I am glad it is over…this stuff is draining
Here is what was covered today
Network Programming
Low Level TCP/IP Protocols
IPv4 and IPv6
UDP Multicast
TCP/IP
Message Based protocols
HTTP
Connections framework using URL (Unified Resource Locator)
Remote Objects
RMI (Remote Method Invocation)
CORBA (Common Object Request Broker Architecture)
Optional packages supporting additional protocols
SOAP, Mail etc etc
We talked about port numbers, here are some common ones that you might know
20 & 21: File Transfer Protocol (FTP)
22: Secure Shell (SSH)
23: Telnet remote login service
25: Simple Mail Transfer Protocol (SMTP)
53: Domain Name System (DNS) service
80: Hypertext Transfer Protocol (HTTP)
110: Post Office Protocol (POP3)
119: Network News Transfer Protocol (NNTP)
143: Internet Message Access Protocol (IMAP)
161: Simple Network Management Protocol (SNMP)
443: HTTP Secure (HTTPS)
Threads
In an operating process, each running program is basically a process
The operating system schedules processes for execution
Each process has its own (virtual) address space
Communications between processes is hampered by context switching
A thread is a flow of execution within a java process
The JVM schedules therads for execution
Threads share access to java objects
Communication between threads is quick
On multi-CPU/multi-core machines, several threads can execute at the same time
Executing with threads
One thread is started automatically to execute main()
The main() method may start additional threads
Single threaded applications run until main() terminates
Multi threaded applications run until all threads have terminated or if one of the threads calls System.exit()
Static methods manipulate the current thread
currentThread() returns a refernce to the thread that is currently executing
yield() pauses the currently executing thread
sleep(int ms) blocks the currently executing thread for a specific milliseconds
Instance methods that manipulate a particular thread
start() starts thread execution
getName() gets the name of the thread
interrupt() throws an exception or sets the interrupt status
join() waits for the thread to die
setPriority set the priority for a thread
The run() method will hold the code to be executed by a thread
The stop(), suspend() and resume() methods are deprecated
Local variables are never shared between threads, threads can share memory on the heap like static variables, instance variables and members of arrays
We covered synchronization, thread scheduling
JDBC
WE covered the regular DB related stuff, how to connect to a DB, explanation what the 4 type of jdbc drivers are, executing, statements, prepared statements and stored procedures
Web programming
We covered servlets, JSP, javabeans, struts, mvc…pretty much similar stuff I was doing in 2001 but now we have many more frameworks to makes things easier
Denis has been working with SQL Server since version 6.5. Although he worked as an ASP/JSP/ColdFusion developer before the dot com bust, he has been working exclusively as a database developer/architect since 2002. In addition to English, Denis is also fluent in Croatian and Dutch, but he can curse in many other languages and dialects (just ask the SQL optimizer) He lives in Princeton, NJ with his wife and three kids.
