<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
</head>
<body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif;">
<div>I think we agree on the lazy execution model. At least at a high-level, I'd rather not agree on the API's that are exactly exposed until there is an implementation since I've found that agreeing to any type of API's before there is the needed groundwork
to make it happen is pretty useless and a waste of energy on everyones part.</div>
<div><br>
</div>
<div><i>Decider</i> sounds like it could work also as a name, although it seems from dataflow like work its called a switch or gate, either or I guess.</div>
<div><br>
</div>
<div>As far as the micro-language:</div>
<div><br>
</div>
<div>So there are typically 2 types of DSL's that occur, internal and external.</div>
<div><br>
</div>
<div>An internal DSL is like <a href="http://martinfowler.com/bliki/InternalDslStyle.html">http://martinfowler.com/bliki/InternalDslStyle.html</a>, taskflow is already a micro-DSL internal to python (mistral is an external DSL[1]). To me there is a drawback
of becoming to much of a DSL (internal or external) in that it requires a lot of new learning (imho internal DSLs are easier to pick-up since they take advantage of the surrounding languages capabilities, in this case python). So that’s what I just want to
keep in our minds that we need to make it simple *enough*, or we will die a nasty death of complexity :-P</div>
<div><br>
</div>
<div>[1] http://martinfowler.com/bliki/DomainSpecificLanguage.html</div>
<div><br>
</div>
<span id="OLK_SRC_BODY_SECTION">
<div style="font-family:Calibri; font-size:11pt; text-align:left; color:black; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style="font-weight:bold">From: </span>Renat Akhmerov <<a href="mailto:rakhmerov@mirantis.com">rakhmerov@mirantis.com</a>><br>
<span style="font-weight:bold">Reply-To: </span>"OpenStack Development Mailing List (not for usage questions)" <<a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.openstack.org</a>><br>
<span style="font-weight:bold">Date: </span>Tuesday, April 15, 2014 at 12:19 AM<br>
<span style="font-weight:bold">To: </span>"OpenStack Development Mailing List (not for usage questions)" <<a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.openstack.org</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [openstack-dev] [Mistral][TaskFlow] Mistral-TaskFlow Summary<br>
</div>
<div><br>
</div>
<blockquote id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style="BORDER-LEFT: #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">
Some notes:
<div>
<ul class="MailOutline">
<li>Even though we use YAQL now our design is flexible enough to plug other ELs in.</li><li>If it tells you something in Amazon SWF a component that makes a decision about a further route is called Decider. </li><li>This discussion about conditionals is surely important but it doesn’t matter too much if we don’t agree on that lazy execution model.</li></ul>
</div>
<div><br>
</div>
<div>
<blockquote type="cite">
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; font-size: 14px; font-family: Calibri, sans-serif;">
<div>Of course I'm trying to make the above not be its own micro-language as much as possible (a switch object starts to act like one, sadly).</div>
</div>
</blockquote>
<div><br>
</div>
Why do you think it’s going to be a micro-language?</div>
<div><br>
<blockquote type="cite">
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; font-size: 14px; font-family: Calibri, sans-serif;">
<div></div>
<div>[1] <a href="http://www.cs.cmu.edu/~aldrich/papers/onward2009-concurrency.pdf">http://www.cs.cmu.edu/~aldrich/papers/onward2009-concurrency.pdf</a></div>
<div>[2] <a href="http://www.cs.ucf.edu/~dcm/Teaching/COT4810-Spring2011/Literature/DataFlowProgrammingLanguages.pdf">http://www.cs.ucf.edu/~dcm/Teaching/COT4810-Spring2011/Literature/DataFlowProgrammingLanguages.pdf</a></div>
</div>
</blockquote>
<div><br>
</div>
<div>Cool, thanks!</div>
</div>
<br>
</div>
</div>
</blockquote>
</span>
</body>
</html>