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factorio-clusterio/docs/assets/connection_flow.svg
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Hornwitser de48d807f1 Refactor connector logic 
Refine the state flow used in the connector abstractions to better
handle close while connecting and resuming.  The new logic is to close
the connection immediately in these two states instead of continuing
trying to connect and then giving up some point later.

For the connectors the handshake state is split into connecting
and resuming, new is replaced by closed, and the closing state is turned
into a boolean flag as it's possible that closing is desired while
connecting, connected or resuming.  The connecting state is not present
in the server connector because there's nothing for the server to do in
that connector state.

The timeout logic is completely removed, once a connection attempt is
started for the client it will continue to attempt to connect, attempt
to resume dropped connections and attempt reconnects until either an
authentication error occurs or the client explicitly requests to close
the connection.

A new session timeout is added to control how long to attempt to resume
the connection until it's considered dead and invalidated.  This allows
stale connections to give up earlier, and swallow up less data while in
the dropped but not yet invalidated state.

For the client side sending messages while it's connecting has been
changed to throw an error instead of queuing up the message and
(possibly) sending it after the connection is established.  Code
shouldn't try to send messages without knowing if the connection it's
trying to send them over is active or not.
2021-08-30 20:20:49 +02:00

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align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 251px; margin-left: 526px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; ">no<br />session</div></div></div></foreignObject><text x="526" y="255" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">no...</text></switch></g><path d="M 530 215 L 440 215 L 440 570 L 523.63 570" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 528.88 570 L 521.88 573.5 L 523.63 570 L 521.88 566.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 200px; margin-left: 473px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; ">bad handshake<br />timeout</div></div></div></foreignObject><text x="473" y="203" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">bad handshake...</text></switch></g><rect x="530" y="199.96" width="120" height="30" fill="#ffffff" stroke="#000000" stroke-width="2" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 215px; margin-left: 531px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">Wait for hello</div></div></div></foreignObject><text x="590" y="219" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Wait for hello</text></switch></g><path d="M 590 159.98 L 590 193.59" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 590 198.84 L 586.5 191.84 L 590 193.59 L 593.5 191.84 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><rect x="530" y="119.98" width="120" height="40" rx="6" ry="6" fill="#ffffff" stroke="#000000" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 140px; margin-left: 531px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">WebSocket Open</div></div></div></foreignObject><text x="590" y="144" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">WebSocket Open</text></switch></g><path d="M 660 300.02 L 660 360 L 660 403.65" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 660 408.9 L 656.5 401.9 L 660 403.65 L 663.5 401.9 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><rect x="600" y="270.02" width="120" height="30" fill="#ffffff" stroke="#000000" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 285px; margin-left: 601px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">Send resume</div></div></div></foreignObject><text x="660" y="289" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Send resume</text></switch></g><path d="M 520 300.02 L 520 403.65" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 520 408.9 L 516.5 401.9 L 520 403.65 L 523.5 401.9 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><rect x="460" y="270.02" width="120" height="30" fill="#ffffff" stroke="#000000" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 285px; margin-left: 461px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">Send register</div></div></div></foreignObject><text x="520" y="289" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Send register</text></switch></g><rect x="530" y="550.02" width="120" height="40" rx="6" ry="6" fill="#ffffff" stroke="#000000" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 570px; margin-left: 531px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">Close connection</div></div></div></foreignObject><text x="590" y="574" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Close connection</text></switch></g><rect x="530" y="480.02" width="120" height="40" rx="6" ry="6" fill="#ffffff" stroke="#000000" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 500px; margin-left: 531px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">Connected</div></div></div></foreignObject><text x="590" y="504" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Connected</text></switch></g><path d="M 630 410.02 L 630 390 L 630 376.39" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 630 371.14 L 633.5 378.14 L 630 376.39 L 626.5 378.14 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 386px; margin-left: 600px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; ">receive<br />invalidate</div></div></div></foreignObject><text x="600" y="390" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">receive...</text></switch></g><path d="M 700 440.02 L 700 570 L 656.37 570" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 651.12 570 L 658.12 566.5 L 656.37 570 L 658.12 573.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)rotate(90 686.0833333333333 490.27)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 490px; margin-left: 686px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; ">bad handshake<br />timeout</div></div></div></foreignObject><text x="686" y="494" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">bad handshake...</text></switch></g><path d="M 630 440.02 L 630 450 L 630 473.65" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 630 478.9 L 626.5 471.9 L 630 473.65 L 633.5 471.9 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 454px; margin-left: 608px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; ">receive<br />continue</div></div></div></foreignObject><text x="608" y="457" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">receive...</text></switch></g><rect x="600" y="410.02" width="120" height="30" fill="#ffffff" stroke="#000000" stroke-width="2" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 425px; margin-left: 601px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">Wait for continue</div></div></div></foreignObject><text x="660" y="429" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Wait for continue</text></switch></g><path d="M 550 340.02 L 550 320 L 550 306.39" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 550 301.14 L 553.5 308.14 L 550 306.39 L 546.5 308.14 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><rect x="530" y="340.02" width="120" height="30" fill="#ffffff" stroke="#000000" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 355px; margin-left: 531px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">Invalidate session</div></div></div></foreignObject><text x="590" y="359" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Invalidate session</text></switch></g><path d="M 470 440.02 L 470 560 L 523.63 560" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 528.88 560 L 521.88 563.5 L 523.63 560 L 521.88 556.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)rotate(90 484.5833333333335 490.10333333333324)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 490px; margin-left: 485px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; ">bad handshake<br />timeout</div></div></div></foreignObject><text x="485" y="493" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">bad handshake...</text></switch></g><path d="M 550 440.02 L 550 470 L 550 473.65" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 550 478.9 L 546.5 471.9 L 550 473.65 L 553.5 471.9 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 455px; margin-left: 530px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: nowrap; ">receive<br />ready</div></div></div></foreignObject><text x="530" y="459" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">receive...</text></switch></g><rect x="460" y="410.02" width="120" height="30" fill="#ffffff" stroke="#000000" stroke-width="2" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 425px; margin-left: 461px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">Wait for ready</div></div></div></foreignObject><text x="520" y="429" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Wait for ready</text></switch></g></g><switch><g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/><a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank"><text text-anchor="middle" font-size="10px" x="50%" y="100%">Viewer does not support full SVG 1.1</text></a></switch></svg>
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