166 lines
6.8 KiB
Markdown
166 lines
6.8 KiB
Markdown
---
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title: Home
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layout: page
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class: frontpage
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link:
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ghrepo: 'https://github.com/tonyg/syndicate'
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docs: 'http://docs.racket-lang.org/syndicate@syndicate/index.html'
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---
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**noun**
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/ˈsindikit/
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1. a self-organizing group of individuals, companies, corporations or
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entities formed to transact some specific business, to pursue or
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promote a shared interest.
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<small>—[Wikipedia](https://en.wikipedia.org/wiki/Syndicate)</small>
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<div></div>
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<!-- # Motivation -->
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<!-- Every interactive program needs some way of -->
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<!-- - representing the *conversations* it is having as *concurrent -->
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<!-- components* -->
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<!-- - *mapping incoming events* to these components -->
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<!-- - managing the *shared understanding* that the components are -->
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<!-- building as they work towards the program's goal -->
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<!-- - cleaning up shared state after *partial failure* of a component -->
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<!-- - *scoping* interactions and shared state inside the program -->
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<!-- Existing programming languages lack linguistic support for these -->
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<!-- requirements, leaving the programmer to fend for themselves. -->
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<!-- Syndicate is a language designed to help organise interactive -->
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<!-- programs. -->
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## Overview
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Syndicate is an Actor-based programming language offering
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- pub/sub pattern-based message routing, for mapping events to actors
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- *dataspaces*, stores for semi-structured data, for managing shared
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state
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- *state change notifications* for keeping actors informed of changes
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in dataspaces
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- integrated techniques for registering and discovering services and
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for cleaning up after both graceful and unexpected actor failures
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- recursive layering of groups of actors, each group with a private
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dataspace of its own, for organising larger programs
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<!-- Together, these features help address the above challenges. -->
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Together, these features help programmers organise their interactive programs.
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## Example
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These two actors implement a toy “bank account” actor that listens for
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`deposit` messages and maintains an `account` balance record in the
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shared dataspace. The first is written using Syndicate implemented for
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Racket, and the second using Syndicate for JavaScript.
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{% capture racket_example1 %}{% include frontpage_racket_example1.md %}{% endcapture %}
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{% capture javascript_example1 %}{% include frontpage_javascript_example1.md %}{% endcapture %}
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{% capture racket_example2 %}{% include frontpage_racket_example2.md %}{% endcapture %}
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{% capture javascript_example2 %}{% include frontpage_javascript_example2.md %}{% endcapture %}
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<div class="frontpage_code_examples">
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{{ racket_example1 | markdownify }}
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{{ javascript_example1 | markdownify }}
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</div>
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The next two implement a client for the “bank account”. Each time the
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balance in the shared dataspace changes, they print a message to the
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console.
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<div class="frontpage_code_examples">
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{{ racket_example2 | markdownify }}
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{{ javascript_example2 | markdownify }}
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</div>
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The full code for the Racket example is
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[bank-account.rkt](https://github.com/tonyg/syndicate/blob/master/racket/syndicate/examples/actor/bank-account.rkt),
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and for the JavaScript example,
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[demo-bankaccount.js](https://github.com/tonyg/syndicate/blob/master/js/compiler/demo-bankaccount.js).
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## Live Syndicate/js demos
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[This page](examples/) links to in-browser runnable demos (and source
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code) of Syndicate/js programs.
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## Code
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Syndicate is implemented both for [Racket](http://racket-lang.org/)
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and for [JavaScript](https://en.wikipedia.org/wiki/ECMAScript).
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<a href="{{ page.link.ghrepo }}"><img class="leftfloat" alt="Link to Syndicate github repo" src="{{ site.baseurl }}/img/GitHub-Mark-64px.png"></a>
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The [Syndicate github repository]({{ page.link.ghrepo }}) contains
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implementations along with some larger example programs.
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<div class="clear"></div>
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## Documentation
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The system is still somewhat in flux, and documentation is still being
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written. My [dissertation](tonyg-dissertation/) has a chapter
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describing the Racket implementation of Syndicate and a chapter
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including many examples demonstrating idioms of Syndicate programming.
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<!-- A draft of the documentation for the Racket implementation of -->
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<!-- Syndicate is available [here]({{ page.link.docs }}). -->
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## Dissertation
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A [resource page](tonyg-dissertation/) is available, including links
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to the PDF and HTML versions of the dissertation document, a recording
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of my defense talk, and the corresponding slides.
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<a href="{{ site.baseurl }}/papers/conversational-concurrency-201712310922.pdf"><img class="leftfloat" src="{{ site.baseurl }}/img/pdf_icon_gen_48x49.png"></a>
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Tony Garnock-Jones, [“Conversational Concurrency”]({{ site.baseurl
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}}/papers/conversational-concurrency-201712310922.pdf), PhD
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dissertation, December 2017, College of Computer and Information
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Science, Northeastern University, Boston, Massachusetts. ([PDF]({{
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site.baseurl }}/papers/conversational-concurrency-201712310922.pdf);
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[HTML](tonyg-dissertation/html/); [Resources](tonyg-dissertation/))
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<div class="clear"></div>
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## Papers
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<a href="{{ site.baseurl }}/papers/from-events-to-reactions-a-progress-report-20160301-1747.pdf"><img class="leftfloat" src="{{ site.baseurl }}/img/pdf_icon_gen_48x49.png"></a>
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Tony Garnock-Jones, [“From Events To Reactions: A Progress Report”]({{
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site.baseurl
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}}/papers/from-events-to-reactions-a-progress-report-20160301-1747.pdf),
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In: Proc. PLACES 2016 (workshop), April 2016, Eindhoven, Netherlands. ([PDF]({{ site.baseurl }}/papers/from-events-to-reactions-a-progress-report-20160301-1747.pdf); [Slides]({{ site.baseurl }}/papers/places-2016-slides.pdf))
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<div class="clear"></div>
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<a href="{{ site.baseurl }}/papers/coordinated-concurrent-programming-in-syndicate-20160111-1409.pdf"><img class="leftfloat" src="{{ site.baseurl }}/img/pdf_icon_gen_48x49.png"></a>
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Tony Garnock-Jones and Matthias Felleisen,
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[“Coordinated Concurrent Programming in Syndicate”]({{ site.baseurl
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}}/papers/coordinated-concurrent-programming-in-syndicate-20160111-1409.pdf),
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In: Proc. ESOP 2016, April 2016, Eindhoven, Netherlands. ([PDF]({{ site.baseurl }}/papers/coordinated-concurrent-programming-in-syndicate-20160111-1409.pdf); [Slides]({{ site.baseurl }}/papers/esop-2016-slides.pdf))
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<div class="clear"></div>
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<a href="{{ site.baseurl }}/papers/network-as-language-construct-20140117-1204.pdf"><img class="leftfloat" src="{{ site.baseurl }}/img/pdf_icon_gen_48x49.png"></a>
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Tony Garnock-Jones, Sam Tobin-Hochstadt, and Matthias Felleisen,
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[“The Network as a Language Construct”]({{ site.baseurl
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}}/papers/network-as-language-construct-20140117-1204.pdf),
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In: Proc. ESOP 2014, April 2016, Eindhoven, Netherlands. ([PDF]({{ site.baseurl }}/papers/network-as-language-construct-20140117-1204.pdf); [Slides]({{ site.baseurl }}/papers/esop-2014-slides.pdf))
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<div class="clear"></div>
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## Contact
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Please feel free to email me at <a href="mailto:tonyg@leastfixedpoint.com">tonyg@leastfixedpoint.com</a>.
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