Misc

Web Application

• An application that's accessed with a web browser
• Commonly a three-tiered application - web browser : engine (CGI, PHP / JSP / ASP, Servlets) : database

Daemon

• On Unix, a daemon is a computer program that runs in the background.
• The DOS equivalent is Terminate and Stay Resident (TSR) software.
• The Windows equivalent is Services.

• A common role for a daemon is to respond to network requests.

• It's instantiated as a process.
  
• The name typically ends in a "d".

• Unix recognises as a daemon any process that has process number 1 (init) as its parent process. The init process adopts any process whose parent dies without waiting for the child's status
• In common Unix usage a daemon may be any background process, whether a child of init or not.
• init (short for "initialization") is the program on Unix and Unix-like systems which spawns all other processes. It runs as a daemon and typically has PID 1.

Java EE Connector

• Generic architecture for connection to legacy systems (including databases)
• Integrate JMS providers with Java EE application servers by wrapping the client library of the JMS provider in a resource adapter

JNDI

• Java Naming and Directory Interface
• An API for directory services
• Specifies an SPI (Service Provider Interface) for the underlying directory service (LDAP, DNS, NIS, file system, ...)
  
• Used by Java RMI and Java EE to lookup objects in a network

IDL

• Interface Definition Language
• Used for describing the interface for a software component

Misc

• The interface is described in a machine-processable format such as WSDL.

• Binary protocols: JRMP, RMI-IIOP
  
• Text-based protocols: SOAP

• Binary formats: RMI, CORBA
  
• Text-based formats: XML

• JMS (Java Message Service)
  
• JAXP (Java API for XML Processing)

• EJB specifies RPC using RMI-IIOP or CORBA (or possibly JRMP (plain RMI))
• JINI has its own lookup service and does not use the JNDI API

• Database pools / Database connection pools
  
• Security realms