Published
Edited
Oct 26, 2019
class IdGenerator {
static *idGenerator(start = 0) {
let id = start;
while (true) yield id++;
}
static id(prefix = "") {
const gens = IdGenerator.gens = (IdGenerator.gens || {});
const gen = gens[prefix]|| (gens[prefix] = IdGenerator.idGenerator());
const num = gen.next().value;
if (prefix) {
return `${prefix}-${num}`;
}
return num;
}
}
layoutMonitor = new RecentMonitor(4, new MultiMonitor());
styles = ({});
class EventQueue {
constructor() {
this.done = false;
this.newPromise();
this.notifyCount = 0;
this.watcherCount = 0;
this.readCount = 0;
this.waitCount = 0;
}
newPromise() {
this.promise = new Promise(accept => this.accept = accept)
.then(v => {
this.newPromise();
return v;
});
}
async next() {
try {
this.waitCount++;
const v = this.last = await this.promise;
this.readCount++;
return {
value: v,
done: this.done
};
} finally {
--this.waitCount;
}
}
notify(v) {
this.lastNotify = v;
this.notifyCount++;
this.accept && this.accept(v);
}
end() {
this.done = true;
this.notify();
}
watcher() {
this.watcherCount++;
const eq = this;
const w = async function* () {
while (!eq.done) {
const v = await eq.next();
if (v.done) {
eq.done = true;
} else {
yield v.value;
}
}
}
return w();
}
}
class EventMonitor {
constructor() {
this.queue = new EventQueue();
this.done = false;
this.notifyCount = 0;
this.watcherCount = 0;
this.readCount = 0;
this.waitCount = 0;
}
notify(v) {
this.notifyCount++;
return this.queue.notify(v);
}
async transform(v) {
return v;
}
async next() {
try {
this.waitCount++;
let n = await this.queue.next();
this.done = this.done || n.done;
const v = this.last = await n.value;
this.readCount++;
return {
value: !n.done && (this.lastX = await this.transform(v)),
done: n.done
};
} finally {
--this.waitCount;
}
}
end() {
this.done = true;
this.queue.end();
}
watcher() {
this.watcherCount++;
const em = this;
const w = async function* () {
while (!em.done) {
let n = await em.next();
if (n.done) {
return n.value;
}
yield await n.value;
}
};
return w();
}
}
class LayoutMonitor extends EventMonitor {
async transform(l) {
return html`
<div class='layout-record'>
<div class='layout-name'>
${l.name} ${l.getStartTime()}
</div>
<div class='layout-line'>
Iterations: ${l.iterationCount}, time: ${l.runtime / 1000.0}s
</div>
<div class='layout-line ${l.status === 'error' ? 'layout-error' : ''}'>
Status: ${l.status} ${l.error || ''}
</div>
</div>
`;
}
}
class MultiMonitor {
constructor(...monitors) {
this.queue = new EventQueue();
this.ended = false;
monitors.forEach(m => this.add(m));
console.log("MultiMonitor created.");
}
add(monitor) {
Promise.resolve().then(async () => {
const w = monitor.watcher();
let done = false;
while (!done && !this.ended) {
const v = await w.next();
if (v.done) {
done = true;
} else {
this.queue.notify({monitor: monitor, value: v.value});
}
}
if (done) {
this.queue.notify({monitor: monitor, done: true});
} else {
this.queue.notify({monitor: this, terminated: true});
}
});
return monitor;
}
watcher() {
return this.queue.watcher();
}
end() {
this.ended = true;
}
}
class RecentMonitor {
constructor(max, ...monitors) {
this.max = max;
this.nextId = 0;
monitors.forEach(m => m.monitorId = this.nextId++);
this.queue = new MultiMonitor(...monitors);
this._history = new Map();
this._done = new Map();
this.results = new EventQueue();
const watcher = this.queue.watcher();
Promise.resolve()
.then(async () => {
while (!this.ended) {
const v = await watcher.next();
if (v.value && v.value.terminated) {
this.ended = true;
this.results.end();
} else if (v.value && v.value.done) {
this._done.set(v.value.monitor.monitorId, v.value);
if (this._done.size > this.max) {
[...this._done.keys()].slice(0, this._done.size - this.max)
.forEach(k => {
this._done.delete(k);
this._history.delete(k);
});
}
this.results.notify(this._history);
} else {
this._history.delete(v.value.monitor.monitorId);
this._history.set(v.value.monitor.monitorId, {...v.value, id: v.value.monitor.monitorId});
const historyList = this._history.values();
if (this._history.length > this.max) {
const nhistory = new Map();
let ndone = 0;
for (const h of this._history) {
if (!h.done && !h.terminated) {
nhistory.set(h.monitor.monitorId, h);
} else if (++ndone <= this.max) {
nhistory.set(h.monitor.monitorId, h);
}
}
this._history = nhistory;
}
this.results.notify(this._history);
}
}
});
}
add(monitor) {
monitor.monitorId = this.nextId++;
return this.queue.add(monitor);
}
history() {
return [...this._history.values()];
}
watcher() {
return this.results.watcher();
}
end() {
this.queue.end();
}
}
md`## Imports`
rm = new RecentMonitor(3, em, em2, em3, em4);
rm.history();
em = mm.add(new EventMonitor());
em2 = mm.add(new EventMonitor())
em3 = mm.add(new EventMonitor())
em4 = mm.add(new EventMonitor())
em.notify(458732)
em2.notify('em2x')
em3.notify('em3')
em4.notify("em4")
em4.end()
em3.end()
em2.end()
em.end()
rm._done.size
[...rm._done.keys()]
//rm._done.keys().slice(rm.max - rm._done.size)
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