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Internet Communications Engine 3.2
Internet Communications Engine is a modern object middleware solution. more>>
Ice, the Internet Communications Engine, is middleware for the practical programmer. A high-performance Internet communications platform, Ice includes a wealth of layered services and plug-ins. Ice means simplicity, speed, and power.
Ice is available under the terms of the GNU General Public License (GPL). Commercial licenses are available for customers who wish to use Ice with proprietary products. Please contact sales@zeroc.com for more information.
Ice is currently available for C++, Java, C#, Visual Basic, Python, and PHP, and is supported on various operating systems. Additional operating systems and languages will be supported in future releases.
Ice consists of the following packages:
Slice The Specification Language for Ice. Slice establishes a contract between clients and servers, and is also used to describe persistent data.
The Slice Compilers Tools to compile from Slice into target languages, such as C++ and Java, or to automatically generate documentation from Slice files.
Ice The Ice core library. Among many other features, the Ice core library manages all the communication tasks using a highly efficient protocol (including protocol compression and support for both TCP and UDP), provides a flexible thread pool for multi-threaded servers, and additional functionality that supports extreme scalability with potentially millions of Ice objects.
IceUtil A collection of utility functions, such as Unicode handling and thread programming. (C++ only.)
IceBox An application server specifically for Ice applications. IceBox can easily run and administer Ice services that are dynamically loaded as a DLL, shared library, or Java class.
IcePack A sophisticated server activation and deployment tool. With IcePack, the complex task of deploying applications in a heterogeneous computer network is dramatically simplified. Simply write a deployment descriptor in industry-standard XML, and IcePack handles the rest.
Freeze Freeze provides automatic persistence for Ice servants. With just a few lines of code, an application can incorporate a highly-scalable evictor that efficiently manages persistent objects.
FreezeScript It is common for persistent data types to change, especially in large software projects. In order to minimize the impact of these changes, FreezeScript provides inspection and migration tools for Freeze databases. The tools support an XML-based scripting capability that is both powerful and easy to use.
IceSSL A dynamic SSL transport plug-in for the Ice core. It provides authentication, encryption, and message integrity, using the industry-standard SSL protocol.
Glacier One of the most difficult challenges for object middleware systems is security and firewalls. Glacier, the firewall solution for Ice, greatly simplifies the deployment of secure applications. Glacier authenticates and filters client requests and allows callbacks to the client in a secure fashion. In combination with IceSSL, Glacier provides a powerful security solution that is both non-intrusive and easy to configure.
IceStorm A messaging service with support for federation. In contrast to most other messaging or event services, IceStorm supports typed events, meaning that broadcasting a message over a federation is as easy as invoking a method on an interface.
IcePatch A patching service for software distributions. Keeping software up-to-date is often a tedious task. IcePatch automates updating of individual files as well as complete directory hierarchies. Only files that have changed are downloaded to the client machine, using efficient compression algorithms.
Enhancements:
- Various additions, including redundant IceGrid registries.
<<lessIce is available under the terms of the GNU General Public License (GPL). Commercial licenses are available for customers who wish to use Ice with proprietary products. Please contact sales@zeroc.com for more information.
Ice is currently available for C++, Java, C#, Visual Basic, Python, and PHP, and is supported on various operating systems. Additional operating systems and languages will be supported in future releases.
Ice consists of the following packages:
Slice The Specification Language for Ice. Slice establishes a contract between clients and servers, and is also used to describe persistent data.
The Slice Compilers Tools to compile from Slice into target languages, such as C++ and Java, or to automatically generate documentation from Slice files.
Ice The Ice core library. Among many other features, the Ice core library manages all the communication tasks using a highly efficient protocol (including protocol compression and support for both TCP and UDP), provides a flexible thread pool for multi-threaded servers, and additional functionality that supports extreme scalability with potentially millions of Ice objects.
IceUtil A collection of utility functions, such as Unicode handling and thread programming. (C++ only.)
IceBox An application server specifically for Ice applications. IceBox can easily run and administer Ice services that are dynamically loaded as a DLL, shared library, or Java class.
IcePack A sophisticated server activation and deployment tool. With IcePack, the complex task of deploying applications in a heterogeneous computer network is dramatically simplified. Simply write a deployment descriptor in industry-standard XML, and IcePack handles the rest.
Freeze Freeze provides automatic persistence for Ice servants. With just a few lines of code, an application can incorporate a highly-scalable evictor that efficiently manages persistent objects.
FreezeScript It is common for persistent data types to change, especially in large software projects. In order to minimize the impact of these changes, FreezeScript provides inspection and migration tools for Freeze databases. The tools support an XML-based scripting capability that is both powerful and easy to use.
IceSSL A dynamic SSL transport plug-in for the Ice core. It provides authentication, encryption, and message integrity, using the industry-standard SSL protocol.
Glacier One of the most difficult challenges for object middleware systems is security and firewalls. Glacier, the firewall solution for Ice, greatly simplifies the deployment of secure applications. Glacier authenticates and filters client requests and allows callbacks to the client in a secure fashion. In combination with IceSSL, Glacier provides a powerful security solution that is both non-intrusive and easy to configure.
IceStorm A messaging service with support for federation. In contrast to most other messaging or event services, IceStorm supports typed events, meaning that broadcasting a message over a federation is as easy as invoking a method on an interface.
IcePatch A patching service for software distributions. Keeping software up-to-date is often a tedious task. IcePatch automates updating of individual files as well as complete directory hierarchies. Only files that have changed are downloaded to the client machine, using efficient compression algorithms.
Enhancements:
- Various additions, including redundant IceGrid registries.
Download (15MB)
Added: 2007-03-30 License: GPL (GNU General Public License) Price:
941 downloads
SAP R/3 Communications Suite 0.9 Beta1
SAP R/3 Communications Suite allows SAP R/3 servers to communicate with external devices such as fax and GSM modems. more>>
SAP R/3 Communications Suite allows SAP R/3 servers to communicate with external devices such as fax and GSM modems by sending and receiving a fax or SMS.
SAP R/3 Communications Suite provides an easy configuration through a Web interface and a JMX console.
<<lessSAP R/3 Communications Suite provides an easy configuration through a Web interface and a JMX console.
Download (28.6MB)
Added: 2006-07-28 License: GPL (GNU General Public License) Price:
702 downloads
Meldware Communication Suite 1.0M6
Meldware Communication Suite is a platform independent groupware package. more>>
Meldware Communication Suite is a platform independent groupware package consisting of:
Meldware Mail
Meldware Calendar
Meldware Webmail
Meldware Secure Administration System
Together the package provides support for thousands of users to concurrently send and receive email and schedule meetings. MCS uniquely allows you to store all messages and scheduling events in nearly any database and runs on nearly all popular software and hardware platforms.
Additionally, while the scheduling and calendaring services are able to be installed separately, the integrated featureset provides both a unique and powerful experience to both users and server-side Mail Based Applications and Collaboration Based Application Services.
The MCS platform provides security integration using LDAP sources including Microsoft Active Directory as well as flat-file and Database sources. Additionally, extensible security allows custom authentication/authorization sources.
Enhancements:
- IMAP is now stable with Mozilla Thunderbird and POP/SMTP are production ready.
- New Filestore code was implemented and many improvements were made in mailbox and storage code.
<<lessMeldware Mail
Meldware Calendar
Meldware Webmail
Meldware Secure Administration System
Together the package provides support for thousands of users to concurrently send and receive email and schedule meetings. MCS uniquely allows you to store all messages and scheduling events in nearly any database and runs on nearly all popular software and hardware platforms.
Additionally, while the scheduling and calendaring services are able to be installed separately, the integrated featureset provides both a unique and powerful experience to both users and server-side Mail Based Applications and Collaboration Based Application Services.
The MCS platform provides security integration using LDAP sources including Microsoft Active Directory as well as flat-file and Database sources. Additionally, extensible security allows custom authentication/authorization sources.
Enhancements:
- IMAP is now stable with Mozilla Thunderbird and POP/SMTP are production ready.
- New Filestore code was implemented and many improvements were made in mailbox and storage code.
Download (64.9MB)
Added: 2006-12-13 License: LGPL (GNU Lesser General Public License) Price:
1050 downloads
DocBook to LaTeX/ConTeXt Publishing 0.2.6
DocBook to LaTeX/ConTeXt Publishing project is splitted in two instances working on the same principles. more>>
DocBook to LaTeX/ConTeXt Publishing project is splitted in two instances working on the same principles. Both instances are intended to produce DVI, PostScript, PDF documents from DocBook SGML or XML sources, by converting first to a high level set of TeX macros.
Even if close, each instance is provided as an independent package and works alone. The available instances are:
dblatex
Publishing is done by using LaTeX.
dbcontext
Publishing is done by using ConTeXt.
<<lessEven if close, each instance is provided as an independent package and works alone. The available instances are:
dblatex
Publishing is done by using LaTeX.
dbcontext
Publishing is done by using ConTeXt.
Download (0.64MB)
Added: 2007-06-26 License: LGPL (GNU Lesser General Public License) Price:
854 downloads
Inter-Thread Communication 1.1.3
Inter-Thread Communication (ITC) aims to make it exceedingly easy to call functions in other threads. more>>
Inter-Thread Communication (ITC) aims to make it exceedingly easy to call functions in other threads.
The lexer does all the work, so just run the lexer on your headers, then call the stub functions.
In addition, it also provides a complete threading API, with the four threading primitives and a high speed threadsafe FIFO class.
Enhancements:
- It add support for GCC 4.x, and the build system is fixed.
<<lessThe lexer does all the work, so just run the lexer on your headers, then call the stub functions.
In addition, it also provides a complete threading API, with the four threading primitives and a high speed threadsafe FIFO class.
Enhancements:
- It add support for GCC 4.x, and the build system is fixed.
Download (0.41MB)
Added: 2006-07-06 License: GPL (GNU General Public License) Price:
1214 downloads
Buni Meldware Communication Suite 1.0M8-final
Buni Meldware Communication Suite (MCS) is a platform-independent groupware package. more>>
Buni Meldware Communication Suite (MCS) is a platform-independent groupware package consisting of:
- Meldware Mail
- Meldware Calendar
- Meldware Webmail
- Meldware Secure Administration System
Together the package provides support for thousands of users concurrently to send and receive email and to schedule meetings. MCS uniquely allows you to store all messages and scheduling events in nearly any database and runs on nearly all popular software and hardware platforms.
MCS commitment to platform and database agnosticism aims to meet increasing business requirements to maximize ease and flexibility of managing and accessing data as well as putting a premium on interoperability.
Additionally, while the scheduling and calendaring services can be installed separately, the integrated feature set provides both a distinctive and powerful experience to both users and server-side Mail Based Applications and Collaboration Based Application Services.
The MCS platform provides security integration using LDAP sources including Microsoft Active Directory as well as flat-file and database sources.
Additionally, extensible security allows custom authentication/authorization sources.
Enhancements:
- This is the first milestone release with WCAP, freebusy for webmail, and mature IMAP all together.
- It has undergone extensive hardening, dogfooding, and QA testing.
- The WCAP protocol for calendaring now works well for Thunderbird and Lightning 0.3.
- Webmail calendaring was greatly improved.
- The abillity to download attachments has been added to the webmail interface.
- Numerous performance improvements have been made in SMTP, IMAP, and MIME parsing since 1.0-M7.
<<less- Meldware Mail
- Meldware Calendar
- Meldware Webmail
- Meldware Secure Administration System
Together the package provides support for thousands of users concurrently to send and receive email and to schedule meetings. MCS uniquely allows you to store all messages and scheduling events in nearly any database and runs on nearly all popular software and hardware platforms.
MCS commitment to platform and database agnosticism aims to meet increasing business requirements to maximize ease and flexibility of managing and accessing data as well as putting a premium on interoperability.
Additionally, while the scheduling and calendaring services can be installed separately, the integrated feature set provides both a distinctive and powerful experience to both users and server-side Mail Based Applications and Collaboration Based Application Services.
The MCS platform provides security integration using LDAP sources including Microsoft Active Directory as well as flat-file and database sources.
Additionally, extensible security allows custom authentication/authorization sources.
Enhancements:
- This is the first milestone release with WCAP, freebusy for webmail, and mature IMAP all together.
- It has undergone extensive hardening, dogfooding, and QA testing.
- The WCAP protocol for calendaring now works well for Thunderbird and Lightning 0.3.
- Webmail calendaring was greatly improved.
- The abillity to download attachments has been added to the webmail interface.
- Numerous performance improvements have been made in SMTP, IMAP, and MIME parsing since 1.0-M7.
Download (55.3MB)
Added: 2007-08-02 License: LGPL (GNU Lesser General Public License) Price:
815 downloads
Interprocess Communication Server(unix) 1.07
Interprocess synchronization and communication primitives for C++ more>> RIPC is library providing interprocess synchronization and communication capabilities for processes running at different network nodes. RIPC provides wide set of standard primitives: semaphore, event, FIFO queue, barrier, shared memory, shared and exclusive locks.
Structure of RIPC package
RIPC package consists of two libraries:
ripcclient.lib
Provides stubs of RIPC primitives sending requests to the server
ripcserver.lib
Server implementation of RIPC primitives
RIPC supports local and remote sessions. Remote sessions created by RIPCClientFactory class establish connection with the server through TCP/IP stream socket. Server process should be started before clients. In this case primitives at local computer servers as stubs and redirect requests to the server. This mode is useful to provide synchronization and communication between several processes at the same or different computers.
Local sessions are created by RIPCServerFactory class. Them are useful to provide synchronization of threads within the same process (if you want to use more sophisticated synchronization primitives than standard synchronization facilities provided by OS). The single local session can be shared by all threads. No server process should be started in this case.
Quick start
Include files needed for use of RIPC package are located in inc directory. Libraries are located in lib directory. Version of RIPC for windows is provided with binaries of these librarier and server built by Visual C++ comiler. At all other system you will have to build these libraries yourself. Change directory to src and exceute make (for Visual C++ RIPC provides make.bat file which invokes MS nmake utility for makefile.mvc). By default static version of librarier are built. To produce dynamically linked librariers, edit makefile and assign set GENERATE_DLL=1. In case of using DLL libraries do not forget to include them in PATH (at Windows) or in LD_LIBRARY_PATH (at Unix).<<less
Download (106KB)
Added: 2009-04-16 License: Freeware Price: Free
190 downloads
Podcast::Publisher 0.50
Podcast::Publisher is a Perl module for creating and managing podcasts. more>>
Podcast::Publisher is a Perl module for creating and managing podcasts.
SYNOPSIS
use Podcast::Publisher;
my $podcast = Podcast::Publisher->new;
$podcast->set_logger( sub { my $msg = shift; print $msg; } );
$podcast->set_error_logger( sub { my $msg = shift; print STDERR $msg; } );
my $xml = "./podcast.xml";
$podcast->set_file( $xml );
$podcast->set_remote_root( "http://localhost.localdomain/podcast/publishing/" );
$podcast->set_db_connection( { driver => "mysql",
username => foo,
password => bar,
host => localhost,
database => podcast } );
# If we change podcast information, synchronize this information in the MP3 file itself
$podcast->set_synchronize( 1 );
$podcast->set_metadata( { title => "Chris Podcast",
description => "All About Chris",
"docs" => "http://localhost",
"editor" => "podcastmanager@localhost",
"webmaster" => "podcastmanager@localhost",
} );
# This adds an item to the database, and synchronizes the
# MP3 Tag information in the file with the database
$podcast->add_new_episode( { title => Some title,
author => Chris of course
category => Jazz
description => First in a series of many
mp3 => /home/foobar/mp3s/episode1.mp3 } );
$podcast->set_upload_settings( { host => localhost.localdomain,
username => someuser,
password => somepass,
path => podcast/publishing/,
remote_root => http://localhost.localdomain/podcast/publishing/ } );
$podcast->upload();
<<lessSYNOPSIS
use Podcast::Publisher;
my $podcast = Podcast::Publisher->new;
$podcast->set_logger( sub { my $msg = shift; print $msg; } );
$podcast->set_error_logger( sub { my $msg = shift; print STDERR $msg; } );
my $xml = "./podcast.xml";
$podcast->set_file( $xml );
$podcast->set_remote_root( "http://localhost.localdomain/podcast/publishing/" );
$podcast->set_db_connection( { driver => "mysql",
username => foo,
password => bar,
host => localhost,
database => podcast } );
# If we change podcast information, synchronize this information in the MP3 file itself
$podcast->set_synchronize( 1 );
$podcast->set_metadata( { title => "Chris Podcast",
description => "All About Chris",
"docs" => "http://localhost",
"editor" => "podcastmanager@localhost",
"webmaster" => "podcastmanager@localhost",
} );
# This adds an item to the database, and synchronizes the
# MP3 Tag information in the file with the database
$podcast->add_new_episode( { title => Some title,
author => Chris of course
category => Jazz
description => First in a series of many
mp3 => /home/foobar/mp3s/episode1.mp3 } );
$podcast->set_upload_settings( { host => localhost.localdomain,
username => someuser,
password => somepass,
path => podcast/publishing/,
remote_root => http://localhost.localdomain/podcast/publishing/ } );
$podcast->upload();
Download (0.012MB)
Added: 2006-11-09 License: GPL (GNU General Public License) Price:
1081 downloads
Libtubo Interprocess Communication 4.5.0
Libtubo Interprocess Communication is a small and simple library to run processes in the background and communicate via stdout. more>>
Libtubo Interprocess Communication is a small and simple library that can run processes in the background and communicate via the stdout, stderr, and stdin file descriptors.
The functionality of libtubo is similar to the glib function g_spawn_async_with_pipes(), except that all pipe setup and monitoring is taken care of.
The calling function only has to provide the functions with which to process the input/output of the remote process.
The library first appeared in the year 2000 in the xfce3 desktop as part of the xfsamba application, and is now available for use for other developers.
Enhancements:
- Some control bugfixes.
- The version has been updated to the xffm scheme, as this package is now distributed with xffm.
<<lessThe functionality of libtubo is similar to the glib function g_spawn_async_with_pipes(), except that all pipe setup and monitoring is taken care of.
The calling function only has to provide the functions with which to process the input/output of the remote process.
The library first appeared in the year 2000 in the xfce3 desktop as part of the xfsamba application, and is now available for use for other developers.
Enhancements:
- Some control bugfixes.
- The version has been updated to the xffm scheme, as this package is now distributed with xffm.
Download (0.35MB)
Added: 2006-05-25 License: LGPL (GNU Lesser General Public License) Price:
1251 downloads
Jogger Publishing Assistant 0.5.2
Jogger Publishing Assistant is a specialized (stripped-down) Jabber client that simplifies publishing to Jogger. more>>
Jogger Publishing Assistant is a specialized (stripped-down) Jabber client that simplifies publishing to Jogger, a Jabber powered weblog.
Soon after registering my first Jabber account I become addicted to this platform. As soon as I found Jogger service, I felt that I need something that will simplify publishing to Jogger.
Jogger uses plain (X)HTML format of entries, so I came to conclusion, that I will need also some kind of simplified markup to ensure validity of HTML chunks I want to send to Jogger.
My first attempt was JogFeeder simple,<<less
Soon after registering my first Jabber account I become addicted to this platform. As soon as I found Jogger service, I felt that I need something that will simplify publishing to Jogger.
Jogger uses plain (X)HTML format of entries, so I came to conclusion, that I will need also some kind of simplified markup to ensure validity of HTML chunks I want to send to Jogger.
My first attempt was JogFeeder simple,<<less
Download (0.60MB)
Added: 2006-05-15 License: GPL (GNU General Public License) Price:
1258 downloads
0publish-gui 0.8
0publish-gui is a GTK tool for publishing software through Zero Install. more>>
0publish-gui is a GTK tool for publishing software through Zero Install.
By publishing an XML feed for your software on your web-site, you make it easy for people to download your programs and their dependencies, and automatically get notified of any updates you make.
0publish-gui is a GTK-based tool for creating these feeds. It allows you to describe your application, list available versions and download locations, and specify dependencies on other libraries. It also handles adding a GPG signature to the feed, so that people can check that updates really are from you.
<<lessBy publishing an XML feed for your software on your web-site, you make it easy for people to download your programs and their dependencies, and automatically get notified of any updates you make.
0publish-gui is a GTK-based tool for creating these feeds. It allows you to describe your application, list available versions and download locations, and specify dependencies on other libraries. It also handles adding a GPG signature to the feed, so that people can check that updates really are from you.
Download (0.031MB)
Added: 2007-07-26 License: GPL (GNU General Public License) Price:
821 downloads
Atom Publishing Protocol framework for Ruby 0.5.0
Atom Publishing Protocol framework for Rubys goal is to make adopting Atom Publishing Protocol(APP) support in web applications more>>
Atom Publishing Protocol framework for Rubys goal is to make adopting Atom Publishing Protocol(APP) support in web applications as easy as it can be. This is to be reached by implementing a framework that handles the protocol-level duties for the programmer, while not making any requirements for the site design. Details of the project are laid down in a roadmap.
The way that this framework realizes this functionality is by implementing a base class for each back-end. At the moment there is only one back-end, for Ruby on Rails. The base classes then expect that the users application responds to a certain interface that makes the content information storing the responsibility of the application.
While implementing the framework Im going to follow two principles, simplicity and generality. Simplicity in that sense that the framework only does what it needs to do, nothing else, thus staying out of the way of the developer, laying down as few constraints on the application as possible.
Generality principle follows on the same track. As the overhead from using the framework is in the minimum, the field of application gets wider. From technical point of view the generality will be helped by multiple back-ends that enable the use of framework in many different environments.
The APP is currently an Internet-Draft and hence most likely will change in near future. For this, it is better to keep the framework as simple as possible so that it can be refactored with minimum effort.
The work for this project is freely available(MIT licensed) from this website. I am writing this framework as a part of my final thesis at the Tampere University of Technology, Finland.
<<lessThe way that this framework realizes this functionality is by implementing a base class for each back-end. At the moment there is only one back-end, for Ruby on Rails. The base classes then expect that the users application responds to a certain interface that makes the content information storing the responsibility of the application.
While implementing the framework Im going to follow two principles, simplicity and generality. Simplicity in that sense that the framework only does what it needs to do, nothing else, thus staying out of the way of the developer, laying down as few constraints on the application as possible.
Generality principle follows on the same track. As the overhead from using the framework is in the minimum, the field of application gets wider. From technical point of view the generality will be helped by multiple back-ends that enable the use of framework in many different environments.
The APP is currently an Internet-Draft and hence most likely will change in near future. For this, it is better to keep the framework as simple as possible so that it can be refactored with minimum effort.
The work for this project is freely available(MIT licensed) from this website. I am writing this framework as a part of my final thesis at the Tampere University of Technology, Finland.
Download (0.008MB)
Added: 2006-05-05 License: MIT/X Consortium License Price:
1267 downloads
Multi-Simulation Interface 0.14.0
Multi-Simulator Interface, in shrot MSI, is a simulation interconnection engine. more>>
Multi-Simulator Interface, in shrot MSI, is a simulation interconnection engine. In other words it is a program that connects simulations together by synchronizing their clocks and data. Multi-Simulation Interface serves the same purpose as HLA and supports most of HLAs functionality (and more).
The MSI is an HLA alternative. The major motivating factors in the design of the MSI are speed, interoperability, and ease of use.
The MSI was written as a cutting edge distributed simulation component to connect multiple instances of ATLs premiere simulation software, CSIM, and it can be used to interface any compatible simulations.
How does the MSI compare to HLA?
The MSI was originally created to be just a light weight HLA RTI. However, as it was written, limitations in HLA were discovered. The MSI is an improvement on both the design and implementation of HLA. Some highlights include:
A 1,536 to 1 reduction in size over the publicly available (until late 2002) HLA RTI.
At least one order of magnitude of bandwidth consumption less than the publicly available (until late 2002) HLA RTI.
The ability to subscribe to an object name in addition to a type.
Time synchronization that allows for proper causality when used with discrete event simulators.
Support for systems-of-systems (SoS) and hierarchically organized simulations.
Availability for many platforms.
MSI Concept - A Synchronized Data Broker
The concept behind MSI is the synchronized data broker. There are many connected software systems that posses state data that changes over the life of that system. In the case where these systems need to exchange this changing data with other systems and the other systems will exhibit the effects of this data on their own state, the synchronization of this data may need to be managed.
Historically the management of this data has been as simple as tagging it with the time of its release. If there is any conflict in the data the most recent version of the data is used. If the data is late an extrapolation can potentially be used. In SQL relational databases transactions and locking are used to ensure data integrity. Most data brokering services offer little or no sychronization, only delivery.
MSI Setup and Use
The MSI uses a XML stream through a direct socket connection for communications. This enables the MSI to be used from any programming language that can use sockets (C, C++, Java, Ada, Lisp, Perl, etc.). Also, the MSI was written with cross-platform libraries that make it portable to all the major OS platforms (Linux, Solaris, Mac OS X, Microsoft Windows, IRIX, HPUX, etc.).
The MSI is a single executable file and is distributed with example code for the simulator/federate side interface.
MSI Time Synchronization
The MSI time synchronizer can mix unconstrained with time constrained simulations. Each constrained simulation reports the time of the next event that will occur in that simulation/federate. This time may be artificially inflated to cause loose synchronization (less overhead but less guarantee of accuracy). The simulations/federates will advance to the announced time.
MSI Data Synchronization
The MSI implements a publish/subscribe data broker. The MSI is presently not validating, therefore it does not require a separate data format specification (like the HLA FOM). When data format validation is implemented, it will be an optional feature and not written in Lisp. This greatly reduces MSIs setup time. Also, not being locked to a predetermined data format allows for dynamic data types.
There are five commands associated with the MSI data broker: publish, subscribe, update, unsubscribe, destroy (destroy is not implemented yet). Simulations/federates may subscribe to object names in addition to object types. This allows simulations to subscribe to specific objects of a type without needing to receive updates of all objects of that type. The update command is both an incoming and outgoing command. When a simulation/federate receives an update command, it is expected to reflect the new values of that object.
The MSI has a very flexible publish and subscribe system. A federate may subscribe to an object type or an object name. In addition a federate may specify particular attributes of an object or object type. For example, if an object has attributes name, x, y, and z, a federate that only considers two dimensions may choose to subscribe only to name, x, and y.
The MSI also supports systems of systems and object hierarchy in simulations. A publishing federate may designate a parent object. Subscribers may then subscribe to the objects children.
MSI Messaging
The MSI allows simulations/federates to send messages (interactions in HLA) to each other. These messages can contain multiple attributes and be multicast to a specific group of simulations.
Recently Added Features
Removed external library dependencies to improve the portability and fragility of the MSI.
Added a better client library.
Improved documentation.
Enhancements:
- An XML parsing bug in the utilities library was fixed.
- The socket library was enhanced with more protocols, Win32 tricks, and the ability to key off of addresses as well as names.
- The --wait-for command line argument was added.
- Several internal bugs were fixed.
- More of the client library and the CSIM interface were flushed out.
- All standard functionality was tested.
<<lessThe MSI is an HLA alternative. The major motivating factors in the design of the MSI are speed, interoperability, and ease of use.
The MSI was written as a cutting edge distributed simulation component to connect multiple instances of ATLs premiere simulation software, CSIM, and it can be used to interface any compatible simulations.
How does the MSI compare to HLA?
The MSI was originally created to be just a light weight HLA RTI. However, as it was written, limitations in HLA were discovered. The MSI is an improvement on both the design and implementation of HLA. Some highlights include:
A 1,536 to 1 reduction in size over the publicly available (until late 2002) HLA RTI.
At least one order of magnitude of bandwidth consumption less than the publicly available (until late 2002) HLA RTI.
The ability to subscribe to an object name in addition to a type.
Time synchronization that allows for proper causality when used with discrete event simulators.
Support for systems-of-systems (SoS) and hierarchically organized simulations.
Availability for many platforms.
MSI Concept - A Synchronized Data Broker
The concept behind MSI is the synchronized data broker. There are many connected software systems that posses state data that changes over the life of that system. In the case where these systems need to exchange this changing data with other systems and the other systems will exhibit the effects of this data on their own state, the synchronization of this data may need to be managed.
Historically the management of this data has been as simple as tagging it with the time of its release. If there is any conflict in the data the most recent version of the data is used. If the data is late an extrapolation can potentially be used. In SQL relational databases transactions and locking are used to ensure data integrity. Most data brokering services offer little or no sychronization, only delivery.
MSI Setup and Use
The MSI uses a XML stream through a direct socket connection for communications. This enables the MSI to be used from any programming language that can use sockets (C, C++, Java, Ada, Lisp, Perl, etc.). Also, the MSI was written with cross-platform libraries that make it portable to all the major OS platforms (Linux, Solaris, Mac OS X, Microsoft Windows, IRIX, HPUX, etc.).
The MSI is a single executable file and is distributed with example code for the simulator/federate side interface.
MSI Time Synchronization
The MSI time synchronizer can mix unconstrained with time constrained simulations. Each constrained simulation reports the time of the next event that will occur in that simulation/federate. This time may be artificially inflated to cause loose synchronization (less overhead but less guarantee of accuracy). The simulations/federates will advance to the announced time.
MSI Data Synchronization
The MSI implements a publish/subscribe data broker. The MSI is presently not validating, therefore it does not require a separate data format specification (like the HLA FOM). When data format validation is implemented, it will be an optional feature and not written in Lisp. This greatly reduces MSIs setup time. Also, not being locked to a predetermined data format allows for dynamic data types.
There are five commands associated with the MSI data broker: publish, subscribe, update, unsubscribe, destroy (destroy is not implemented yet). Simulations/federates may subscribe to object names in addition to object types. This allows simulations to subscribe to specific objects of a type without needing to receive updates of all objects of that type. The update command is both an incoming and outgoing command. When a simulation/federate receives an update command, it is expected to reflect the new values of that object.
The MSI has a very flexible publish and subscribe system. A federate may subscribe to an object type or an object name. In addition a federate may specify particular attributes of an object or object type. For example, if an object has attributes name, x, y, and z, a federate that only considers two dimensions may choose to subscribe only to name, x, and y.
The MSI also supports systems of systems and object hierarchy in simulations. A publishing federate may designate a parent object. Subscribers may then subscribe to the objects children.
MSI Messaging
The MSI allows simulations/federates to send messages (interactions in HLA) to each other. These messages can contain multiple attributes and be multicast to a specific group of simulations.
Recently Added Features
Removed external library dependencies to improve the portability and fragility of the MSI.
Added a better client library.
Improved documentation.
Enhancements:
- An XML parsing bug in the utilities library was fixed.
- The socket library was enhanced with more protocols, Win32 tricks, and the ability to key off of addresses as well as names.
- The --wait-for command line argument was added.
- Several internal bugs were fixed.
- More of the client library and the CSIM interface were flushed out.
- All standard functionality was tested.
Download (3.0MB)
Added: 2006-05-26 License: GPL (GNU General Public License) Price:
1254 downloads
FlashUnity Client 0.3
FlashUnity is a channel-based approach to an XML flash communications server and chat room. more>>
FlashUnity is a channel-based approach to an XML flash communications server and chat room.
Using the concept of channels and filters the FlashUnity server becomes extremely flexible and very easy to extend. Also, by using channels it is possible to run multiple modular functions within the same server.
Filters allow you to prefilter input for all channels or provide other functionality to all channels. This is a total rewrite of CyberSS, and the APIs and XML have multiple major changes. Each module, filter, and the chat client are in their own seperate PEAR package.
Enhancements:
- Room changes now work properly, and there are Uselist updates.
- This is the final release before 1.0.
<<lessUsing the concept of channels and filters the FlashUnity server becomes extremely flexible and very easy to extend. Also, by using channels it is possible to run multiple modular functions within the same server.
Filters allow you to prefilter input for all channels or provide other functionality to all channels. This is a total rewrite of CyberSS, and the APIs and XML have multiple major changes. Each module, filter, and the chat client are in their own seperate PEAR package.
Enhancements:
- Room changes now work properly, and there are Uselist updates.
- This is the final release before 1.0.
Download (0.47MB)
Added: 2006-02-28 License: GPL (GNU General Public License) Price:
1335 downloads
ChordCast 0.9.9b
ChordCast is a Java program designed to help musicians in creating, sharing, and printing chords. more>>
ChordCast is a Java program designed to help musicians in creating, sharing, and printing chords. It can export chords to HTML documents (using PNG images) for easy publishing. The application is written in English and in French.
Enhancements:
- Drag n drop behavior improved
- Context menus added
- Special or accentuated characters bug fixed
- Several other bug fixes.
<<lessEnhancements:
- Drag n drop behavior improved
- Context menus added
- Special or accentuated characters bug fixed
- Several other bug fixes.
Download (0.43MB)
Added: 2006-07-19 License: GPL (GNU General Public License) Price:
1195 downloads
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