"Google Cloud " !!

"Points You Should Remember While Designing a Solution "

1)          Partitions of Application

2)           Ease of Use ( Use Abstraction to use loose coupling between layers.)

3)            Structuring – ( Communication of components)

4)            Performance ( Use of Caching)

5)            Maintanance (Logging and instrumentation)

6)            Secuirty (Authentication & Authorization)

7)            Secuirty ( How pass sensitive data over  network)

8)            Exception Management

9)             Session Management

10)         Validation

" Those Basic layers "

"Web Application Deployment "

"Web-INF Directory Structure !!

Deployment Architecture

Clustering with MULE-ESB

Enterprise Arch Vs Solution Arch

JVM Memory

JSON for REST

JProfiler

Code Quality in JAVA

REST + JAVA

MULE ESB - Configuration

MULE ESB - Architecture

MULE - ESB

ESB features

"Restful WebServices" - in NutShell

Intro:
  1) REST is an Arch style, based on
                     a) Web Standards
                     b) HTTP Protocol

  2) Everything is a "RESOURCE"
  3) REST Client ---> REST Service
  4) Resources are identified as "Global IDs" (URLs)
  5) HTTP Methods  -  (GET, PUT, POST, DELETE)
  6) MIME Types are - (XML , Text, JSON, User-defined..)
  7) JAX-RS supports
                  a)  XML
                  b)  JSON (via JAXB)

 8) JAVA -> REST -> JERSEY

 9) Register Servlet provided by Jersey Via "Web.xml"
 10) Define the PATH, under which your Application is available
     
       Base URL of Servlet is


http://your_domain:port/display-name/url-pattern/path_from_rest_class

 11)This servlet which analyze the incoming HTTP request and select the correct class and method to respond to this request. This selection is based on annotation in the class and methods.
 12) The complete path to a resource is therefore based on the base URL and the @PATh annotation in your class.

http://your_domain:port/display-name/url-pattern/path_from_rest_class

13) JERSEY - contains "Rest Server" + "Rest Client"

Spring - in NutShell

Advantages of Spring:
    1) Layered Arch (only take what you need !! )
    2) Enables POJO Programming
    3) DI & IOC simplifies JDBC
    4) Open Source

Advantages of IoC:
    1) Lesser Source Code
    2) Making Application - more testable
          a) no need of Singletons
          b) no need of DNS lookups
    3) Loose Coupling
    4) IOC Containers support
               a) Eager Instantiation
               b) Lazy Loading of Services
Injections:
     1) Setter Injection
     2) Constructor Injection

Modules:
     1) Core Container
     2) Spring- Context
     3) Spring- AOP
     4) Spring-DAO
     5) Spring-ORM
     6) Spring- Web Module
     7) Spring- MV Framework

Advantages of Application Context:
   1) Resolving "text Messages"
   2) Support for "internationalisation"
   3) Generic way to load  - "File Resources"
   4) Sending Events to BEANs (which registered as Listeners)

Multiple Context Files:
    Splitting Web Application Context into
                   1) Persistance.xml
                   2) Transaction.xml
                   3) Service.xml

Spring - Features

1) Light Wt
2) Inversion Of Control
3) Aspect Oriented (AOP)
4) Container
5) MVC Framework
6) Transaction Management
7) JDBC Exception Handling