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Charles Monteiro via Glass <glass@lists.gemtalksystems.com> hat am 18.01.2022 16:03 geschrieben:
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<p class="MsoNormal">Hi all,</p>
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<p class="MsoNormal">Not sure if this is the right spot to ask,let me know if not, this is more of sales evaluation i.e. that’s the intent.</p>
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<p class="MsoNormal"><span class="Heading2Char"><span style="font-size: 13.0pt;">Context</span></span>:</p>
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<p class="MsoNormal">I wish to evaluate Gemstone/S at first for some more tangential needs that are currently targeted for Mongo.</p>
<p class="MsoNormal">Our core product actually runs over Oracle and soon over any RDMS but for practical purposes we are targetting Postgres.</p>
<p class="MsoNormal">However, potentially the bigger need.</p>
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<p class="MsoNormal">From my FPL and Brooklyn Union Gas days I became quite familiar with using GemBuilder for VW however instead I want to engage Gemstone from Pharo and I understand that not to work the same way.</p>
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<p class="MsoNormal">Recently , (yesterday) I discovered Sparkle which led me to discovering SparkleFFI , so there’s apparently some efforts under way to provide comm from Pharo to Gemstone i.e. more akin to Gembuilder/VW.</p>
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<p class="MsoNormal">Anyhow, to cut to the chase.</p>
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<p class="MsoNormal"><span class="Heading2Char"><span style="font-size: 13.0pt;">Objectives</span></span>:</p>
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<p class="MsoNormal">I’m not interested in building a Seaside app that uses Gemstone for its persistence.</p>
<p class="MsoNormal">Rather, very thin , quite dumb Svelte/JS UIs will talk to Pharo microservice(s) which in turn will talk to Gemstone i.e. that’s the hope.</p>
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<p class="MsoNormal">I would prefer some rpc mechanism where transaction boundaries are controlled from Pharo but I”ll be happy with whatever mechanism I can use to pass objects to Gemstone.</p>
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<p class="MsoNormal">So:</p>
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<li style="margin-left: 0in; mso-list: l0 level1 lfo1;" class="MsoListParagraph">How do I talk to Gemstone from Pharo ?</li>
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<li style="margin-left: 0in; mso-list: l0 level2 lfo1;" class="MsoListParagraph">I believe that Zinc can actually run on Gemstone so json/http(s) would be one way ? Any other way ? best way ?</li>
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We only use REST-like APIs ...
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<li style="margin-left: 0in; mso-list: l0 level1 lfo1;" class="MsoListParagraph">Is there a notification / push mechanism now in place e.g. change to a Gemstone collection could be notified to interested parties (Pharo)</li>
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<li style="margin-left: 0in; mso-list: l0 level2 lfo1;" class="MsoListParagraph">Is there a web socket implementation?</li>
<li style="margin-left: 0in; mso-list: l0 level2 lfo1;" class="MsoListParagraph">Any other messaging implementation ? MQTT ? RabbitMQ etc ?</li>
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I actually asked this also some days ago, but I assume - none. We used in our product a Gemstone/S to ZMQ bridge and then a Python written ZMQ to WebSocket server - this is very stable running with lots of users - but one always has to consider license restrictions, I do as much as I can do to put work from the pure Gemstone/S server to other languages (and other processes not running on the Gemstone cores).
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<li style="margin-left: 0in; mso-list: l0 level1 lfo1;" class="MsoListParagraph">GemConnect / Postgres , would there be a separate additional license fee ?</li>
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With Gemstone/S 3.6.3 there is a free PostgreSQL Connector available ... its on my list to use for our product.
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<li style="margin-left: 0in; mso-list: l0 level1 lfo1;" class="MsoListParagraph">Has the performance of markForCollection changed much in all of these years i.e. does one have to allocate downtime ? i.e. what if the app actually needed to run 24x7, what are the accommodations for said scenario under current Gemstone/S.</li>
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This depends on your hardware, on your database size ... but a downtime is normally not needed.
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<li style="margin-left: 0in; mso-list: l0 level1 lfo1;" class="MsoListParagraph">I assume that for development use that one can install Gemstone under WSL ? If so any issues to be aware of ?</li>
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You can get a free version - but this had lots of limitations, in terms of database size, number of concurrently processes to connect to the stone. You may get a database license by registering at GemtalkSystems. To say it with the Beatles: Limitations "here, there and everywhere". Thats the traditional license.
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You can even get a GemBuilder license ...
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<li style="margin-left: 0in; mso-list: l0 level1 lfo1;" class="MsoListParagraph">Sparkle is the new IDE ? but I see there’s also IoDE ?</li>
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And Jade ... a more traditional Smalltalk IDE.
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<p class="MsoNormal">Finally , given all of the above , and never mind Gemstone/ S setup itself , is there some doc that illustrates a simple hello world scenario where a Pharo image is sending to Gemstone objects for persistence ?</p>
<p class="MsoNormal">A cursory review of the Glass posts seem Seaside centric.</p>
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<p class="MsoNormal">Thanks in advance,</p>
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<p class="MsoNormal"><strong><span style="font-family: 'Arial',sans-serif;">Charles A. Monteiro<br>Chief Technology Officer<br>Datasoft, Inc</span></strong></p>
<p class="MsoNormal"><strong><span style="font-family: 'Arial',sans-serif;">Phone: 347-853-7349</span></strong></p>
<p class="MsoNormal"><strong><span style="font-family: 'Arial',sans-serif;">Web:<a href="http://www.tradeblazer.com"><span style="color: blue;">tradeblazer.com</span></a></span></strong><br></p>
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</div>_______________________________________________ Glass mailing list Glass@lists.gemtalksystems.com https://lists.gemtalksystems.com/mailman/listinfo/glass
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