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queue_simulation.html
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<html>
<head>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.js"></script>
</head>
<body>
<div id="app"></div>
</body>
<script>
const connector = {
template: `
<div class="connector"></div>
`
}
const node = {
props: ["nodeType", "queueSize"],
computed: {
isEntrypoint() {
return this.nodeType === "ENTRYPOINT";
},
isEndpoint() {
return this.nodeType === "ENDPOINT";
}
},
template: `
<div class="node">
<div class="workstation_black-box">
{{(isEntrypoint && "Entrypoint") || (isEndpoint && "Endpoint") || "Workstation"}}
</div>
<div class="workstation_queue" v-if="!isEndpoint && !isEntrypoint">
<div v-for="i in queueSize" class="workstation_queue-item">
</div>
</div>
<div class="workstation_endpoint-status" v-else>
{{queueSize}}
</div>
</div>
`
};
const endpoint = {
template: `
<div class="endpoint">Endpoint</div>
`
};
const nodeTemplate = {
nodeType: "WORKSTATION",
queueSize: 0,
queueCapacity: 5,
efficiency: 1.00
};
const availableQueueSpace = node =>
node.nodeType === "ENDPOINT" ? Number.MAX_SAFE_INTEGER
: node.queueCapacity - node.queueSize;
const newWorkstation = obj => Object.assign({}, nodeTemplate, obj);
const randomCompletionThreshold = (efficiency) => 1 / (1 + (efficiency * ((1 / 0.98) - 1)))
const experiment = {
data() {
return {
nodes: [
{ nodeType: "ENTRYPOINT" },
...new Array(4).fill().map(_ => ({ efficiency: Math.random() * 2 })),
{ nodeType: "ENDPOINT" }
].map(newWorkstation)
}
},
computed: {
entrypoints() {
return this.nodes.filter(w => w.nodeType === "ENTRYPOINT");
},
workstations() {
return this.nodes.filter(w => w.nodeType === "WORKSTATION");
},
randomCompletionThresholds() {
const weakMap = new WeakMap();
this.nodes.forEach(n => {
weakMap.set(n, randomCompletionThreshold(n.efficiency));
});
return weakMap;
}
},
methods: {
simulationLoop() {
setTimeout(() => {
if (Math.random() > 0.98) {
this.generateTask();
}
this.workstations.forEach((n) => {
if (Math.random() > this.randomCompletionThresholds.get(n)) {
this.handoffTask(n, this.nodes[this.nodes.indexOf(n) + 1]);
}
});
this.entrypoints.forEach((e) => {
this.handoffAllTasks(e);
});
this.simulationLoop();
}, 10)
},
generateTask() {
this.entrypoints.forEach(e => e.queueSize++);
},
handoffTask(nodeA, nodeB) {
if (nodeA.queueSize > 0 && availableQueueSpace(nodeB)) {
nodeA.queueSize--;
nodeB.queueSize++;
}
},
handoffAllTasks(node) {
const downstreamNode = this.nodes[this.nodes.indexOf(node) + 1];
const toTransfer = Math.min(node.queueSize, availableQueueSpace(downstreamNode));
downstreamNode.queueSize += toTransfer;
node.queueSize -= toTransfer;
}
},
created() {
this.simulationLoop();
},
template: `
<div class="experiment">
<template v-for="node, index in nodes">
<node v-bind="node" />
<connector v-if="index < nodes.length - 1" />
</template>
</div>
`,
components: {
node,
endpoint,
connector
}
}
window.vue = new Vue({
el: "#app",
data: () => ({
experiments: [{}, {}, {}, {}]
}),
template: `
<div class="app">
<experiment v-for="experiment in experiments" v-bind="experiment" />
</div>
`,
components: {
experiment
}
});
</script>
<style>
.experiment {
margin: auto;
display: flex;
flex-direction: row;
justify-content: center;
align-self: center;
min-height: 20rem;
}
.node, .endpoint {
align-self: flex-start;
}
.workstation_black-box, .endpoint {
padding: 2rem;
line-height: 2rem;
box-sizing:border-box;
border: solid 1px black;
border-radius: 3px;
}
.connector {
width: 8rem;
float: left;
height: 1px;
background-color: black;
position: relative;
top: 3rem;
}
.connector:after {
content: "";
position:absolute;
right: 0;
top: -0.5rem;
border-top: 0.5rem solid transparent;
border-bottom: 0.5rem solid transparent;
border-left: 0.5rem solid black;
}
.workstation_queue {
display: flex;
flex-direction: column;
}
.workstation_queue-item {
width: 100%;
height: 1rem;
background: green;
border: 1px solid white;
}
.workstation_endpoint-status {
text-align: center;
}
</style>
</html>