JAAS Tutorial: Single Sign-On mit Kerberos gegen Windows Domain

JAAS Tutorial: Single Sign-On mit Kerberos gegen Windows Domain

Ein Verzeichnisdienst ermöglicht die zentrale Verwaltung von Ressourcen und ein Single Sign-On über verschiedene Systeme. Die dafür notwendigen Schnittstellen bietet der Java Authentication and Authorization Service (JAAS) und der Java Naming and Directory Service (JNDI).

Dieses Tutorial beschreibt, wie ein Single Sign-On mit JAAS und dem Kerberos Version 5 Authentifizierungsprotokoll umgesetzt werden kann. Als Verzeichnisdienst wurde der Active Directory Service (ADS) von Microsoft verwendet. Mit dem Beispiel wurde das folgende Szenario abgebildet:

* Ein User authentifiziert sich über das Kerberos Version 5 Authentifizierungsprotokoll bei einer Applikation.
* Anschließend wird mittels LDAP aus dem Active Directory des Domänencontrollers die Benutzerrollen des Users ausgelesen.
* Als Beispiel für eine Autorisierung wird, abhängig von den Rollen des Users, die Umgebungsvariablen java.home und user.home ausgegeben.

Java theory and practice: Good housekeeping practices

Java theory and practice: Good housekeeping practices

- openDBcopy - an open-source database migration utility (Java),database migration,open-source,dbcopy,db,copy any database,jdbc,migrate databases,onli

- openDBcopy - an open-source database migration utility (Java),database migration,open-source,dbcopy,db,copy any database,jdbc,migrate databases,online migration,open-source software GPL,Puzzle ITC: "openDBcopy is a universal database utility to migrate data from and to any database given a JDBC driver.

* Standard filters are included
* Custom plugins can be added and/or developed
* Complete migration project saved as XML for easy re-use
* Run with GUI or as batch process"

Joda Time - Java date and time API - Home

Joda Time - Java date and time API - Home: "Joda-Time provides a quality replacement for the Java date and time classes. The design allows for multiple calendar systems, while still providing a simple API. The 'default' calendar is the ISO8601 standard which is used by XML. The Gregorian, Julian, Buddhist, Coptic and Ethiopic systems are also included, and we welcome further additions. Supporting classes include time zone, duration, format and parsing."

jNotes

jNotes: "jNotes is an application for personal information management. With jNotes, you can edit the diaries, schedule events and plan your personal projects.

Main features of jNotes:

* Calendar-based user interface for navigation through the date items
* Easy-to-use text editor for diary notes editing
* Support for the numerous collections of the notes (aka 'books')
* Scheduling the events with reminding in a time
* Lightweight ('minimal') alternative start mode for enabling the event notifications in background
* Scheduling the to-do tasks, grouped in the numerous project workflows
* Calculation of the projects execution progress
* Automatic background saving of the all data changes
* Publishing the notes in the various formats (with pluggable export filters)
* XML is the native format of the jNotes data
* Full I18N support. The program can be localized without a rebuilding the source code."

Tobago

Tobago: "The goal of Tobago is to provide the community with a well designed set of user interface components based on JSF and run on MyFaces.

Tobago is more than just a tag library. The following statements characterize Tobago and make it different from other frameworks:

* The focus of Tobago is to create business applications without the need for HTML design. The development of Tobago pages follows more the development of conventional user interfaces than the creation of web pages.
* The UI components are abstracted from HTML and any layout information that does not belong to the general page structure. The final output format is determined by the client/user-agent.
* A theming mechanism makes it easy to change the look and feel and to provide special implementations for certain browsers. A fallback solution ensures that as much code is reused for new themes as possible.
* A layout manager is used to arrange the components automatically. This means, no manual layouting with HTML tables or other constructs is needed.

The development of Tobago started in 2002."

taglibrarydoc: Documents & files

taglibrarydoc: Documents & files

Multithreaded Job Queue - The Code Project - Threads, Processes & IPC

Multithreaded Job Queue - The Code Project - Threads, Processes & IPC: "In many of our applications we just want to get some thing done asynchronously. This is where some times we prefer to use job queue. Where we can just assign or add a job to the job queue and then it is the job queue's responsibilities to complete the job. This gives the flexibility to the main thread to concentrate on some thing else where the jobs can be processed at the background. If the job queue can be multithreaded and can process multiple jobs at the same time, it is better.

This article describes such an implementation of job queue. This implementation has the following features :

* The job queue is multi threaded, so many jobs can be processed simultaneously. The job queue uses a pool of threads to execute the jobs.
* The job queue supports priorities. The jobs with high priority will be added before the jobs with lower priority, in the queue. So they will be processed before other lower priority jobs.
* The job queue can be paused, so that no new job can be processed from the time of pause. But the user still can add jobs to the queue. The jobs will be processed once the user choose to resume the job queue.
* The number of threads that will be used by the job queue to process the jobs can be increased or decreased at run time.

Background"

spawn JVM via RMI

Creating an Activatable Remote Object: "The RMI daemon, rmid, provides a Java virtual machine* (JVM) from which other JVM instances may be spawned."

This technique can be used to implement fail-over scenarios. Using the rmid to spawn a JVM you have to keep in mind that, if you are using just ONE rmid, this would be single point of failure (SPOF)!

Another possibility to start a NEW JVM is to use the classes provided in the ANT framework. If you have a look to the source code of the Ant Task and trace back to the point where a new JVM is startet you will find the class Execute, with which it is possible to start a completly new JVM (FORK).

java cluster server

JavaWeb_July_August_05Connections.pdf (application/pdf-Objekt)

JavaWeb_July_August_05Connections.pdf (application/pdf-Objekt)