404 lines
14 KiB
JavaScript
404 lines
14 KiB
JavaScript
"use strict";
|
|
|
|
const P = activate require("./internal_protocol");
|
|
const W = activate require("./protocol");
|
|
const C = activate require("./client");
|
|
const B = activate require("./buffer");
|
|
const debugFactory = require('debug');
|
|
|
|
assertion type ManagementScope(scope) = Symbol.for('federation-management-scope');
|
|
|
|
assertion type Uplink(localScope, peer, remoteScope) = Symbol.for('federated-uplink');
|
|
assertion type UplinkConnected(link) = Symbol.for('federated-uplink-connected');
|
|
|
|
Object.assign(module.exports, {
|
|
ManagementScope,
|
|
Uplink, UplinkConnected,
|
|
});
|
|
|
|
import {
|
|
Set, Map, List,
|
|
Observe,
|
|
Skeleton, Dataspace, currentFacet,
|
|
genUuid,
|
|
} from "@syndicate-lang/core";
|
|
|
|
spawn named '@syndicate-lang/server/federation/UplinkFactory' {
|
|
during ManagementScope($managementScope) {
|
|
during P.Envelope(managementScope, $link(Uplink($localScope, $peerAddr, $remoteScope)))
|
|
spawn named link
|
|
{
|
|
during C.ServerConnected(peerAddr) {
|
|
const sessionId = genUuid('peer');
|
|
|
|
const debug = debugFactory('syndicate/server:federation:uplink:' + sessionId);
|
|
on start debug('+', peerAddr.toString());
|
|
on stop debug('-', peerAddr.toString());
|
|
|
|
assert P.Proposal(managementScope, UplinkConnected(link));
|
|
assert P.Proposal(managementScope, P.FederatedLink(sessionId, localScope));
|
|
assert C.ToServer(peerAddr, P.FederatedLink(sessionId, remoteScope));
|
|
|
|
const pendingIn = B.buffer(this, 'pendingIn');
|
|
const pendingOut = B.buffer(this, 'pendingOut');
|
|
|
|
on message C.FromServer(peerAddr, P.ToPOA(sessionId, $p)) {
|
|
pendingIn.push(p);
|
|
}
|
|
|
|
on message P.Envelope(managementScope, P.ToPOA(sessionId, $p)) {
|
|
pendingOut.push(p);
|
|
}
|
|
|
|
during P.Envelope(managementScope, P.FederatedLinkReady(sessionId)) {
|
|
during C.FromServer(peerAddr, P.FederatedLinkReady(sessionId)) {
|
|
pendingIn.drain((p) => {
|
|
debug('<', p.toString());
|
|
send P.Proposal(managementScope, P.FromPOA(sessionId, p));
|
|
});
|
|
pendingOut.drain((p) => {
|
|
debug('>', p.toString());
|
|
send C.ToServer(peerAddr, P.FromPOA(sessionId, p));
|
|
});
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
spawn named '@syndicate-lang/server/federation/LocalLinkFactory' {
|
|
during ManagementScope($managementScope) {
|
|
during P.Envelope(managementScope, P.FederatedLink(_, $scope)) {
|
|
during P.ServerActive(scope)
|
|
spawn named ['@syndicate-lang/server/federation/LocalLink', managementScope, scope]
|
|
{
|
|
const sessionId = genUuid('localLink');
|
|
|
|
const debug = debugFactory('syndicate/server:federation:local:' + scope);
|
|
on start debug('+', sessionId);
|
|
on stop debug('-', sessionId);
|
|
|
|
assert P.Proposal(managementScope, P.FederatedLink(sessionId, scope));
|
|
|
|
const sendFromPOA = (m) => {
|
|
send P.Proposal(managementScope, P.FromPOA(sessionId, m));
|
|
};
|
|
|
|
on message P.Envelope(managementScope, P.ToPOA(sessionId, W.Assert($ep, Observe($spec)))) {
|
|
react {
|
|
on start debug('remoteObs+', spec.toString());
|
|
on stop debug('remoteObs-', spec.toString());
|
|
currentFacet().addObserverEndpoint(() => P.Proposal(scope, spec), {
|
|
add: (vs) => sendFromPOA(W.Add(ep, vs)),
|
|
del: (vs) => sendFromPOA(W.Del(ep, vs)),
|
|
msg: (vs) => sendFromPOA(W.Msg(ep, vs)),
|
|
});
|
|
assert P.Envelope(scope, Observe(spec));
|
|
stop on message P.Envelope(managementScope, P.ToPOA(sessionId, W.Clear(ep))) {
|
|
sendFromPOA(W.End(ep));
|
|
}
|
|
}
|
|
}
|
|
|
|
during Observe($pat(P.Envelope(scope, $spec))) {
|
|
const ep = genUuid('ep');
|
|
on start debug('localObs+', spec.toString(), ep);
|
|
on stop debug('localObs-', spec.toString(), ep);
|
|
on start sendFromPOA(W.Assert(ep, Observe(spec)));
|
|
on stop sendFromPOA(W.Clear(ep));
|
|
on message P.Envelope(managementScope, P.ToPOA(sessionId, W.Add(ep, $captures))) {
|
|
react {
|
|
assert Skeleton.instantiateAssertion(pat, captures);
|
|
stop on message P.Envelope(managementScope, P.ToPOA(sessionId, W.Del(ep, captures)));
|
|
}
|
|
}
|
|
on message P.Envelope(managementScope, P.ToPOA(sessionId, W.Msg(ep, $captures))) {
|
|
send Skeleton.instantiateAssertion(pat, captures);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
class Subscription {
|
|
constructor(id, spec, owner) {
|
|
this.id = id;
|
|
this.spec = spec;
|
|
this.holders = Map();
|
|
this.matches = Map();
|
|
this.owner = owner;
|
|
|
|
this.owner.specs = this.owner.specs.set(spec, id);
|
|
this.owner.subs = this.owner.subs.set(id, this);
|
|
}
|
|
|
|
isEmpty() {
|
|
return this.holders.isEmpty() && this.matches.isEmpty();
|
|
}
|
|
|
|
maybeRemove() {
|
|
if (this.isEmpty()) {
|
|
this.owner.specs = this.owner.specs.remove(this.spec);
|
|
this.owner.subs = this.owner.subs.remove(this.id);
|
|
}
|
|
}
|
|
|
|
addHolder(linkid, ep) {
|
|
this.holders = this.holders.set(linkid, ep);
|
|
}
|
|
|
|
removeHolder(linkid) {
|
|
this.holders = this.holders.remove(linkid);
|
|
this.maybeRemove();
|
|
}
|
|
|
|
addMatch(captures, linkid) {
|
|
const oldMatchHolders = this.matches.get(captures) || Set();
|
|
const newMatchHolders = oldMatchHolders.add(linkid);
|
|
this.matches = this.matches.set(captures, newMatchHolders);
|
|
return oldMatchHolders;
|
|
}
|
|
|
|
removeMatch(captures, linkid) {
|
|
const oldMatchHolders = this.matches.get(captures) || Set();
|
|
const newMatchHolders = oldMatchHolders.remove(linkid);
|
|
this.matches = (newMatchHolders.isEmpty())
|
|
? this.matches.remove(captures)
|
|
: this.matches.set(captures, newMatchHolders);
|
|
this.maybeRemove();
|
|
return newMatchHolders;
|
|
}
|
|
}
|
|
|
|
spawn named '@syndicate-lang/server/federation/ScopeFactory' {
|
|
during ManagementScope($managementScope) {
|
|
function sendToLink(linkid, m) {
|
|
send P.Proposal(managementScope, P.ToPOA(linkid, m));
|
|
}
|
|
|
|
during P.Envelope(managementScope, P.FederatedLink(_, $scope))
|
|
spawn named ['@syndicate-lang/server/federation/Scope', scope]
|
|
{
|
|
let nextId = 0;
|
|
const makeLocalId = () => {
|
|
nextId++;
|
|
return nextId;
|
|
};
|
|
|
|
field this.peers = Set();
|
|
field this.specs = Map();
|
|
field this.subs = Map();
|
|
const scopeThis = this;
|
|
|
|
const callWithSub = (localid, linkid, f) => {
|
|
const sub = this.subs.get(localid, false);
|
|
if (!sub) {
|
|
console.error("Ignoring mention of nonexistent local ID", localid, linkid);
|
|
} else {
|
|
return f(sub);
|
|
}
|
|
};
|
|
|
|
const unsubscribe = (localid, linkid) => {
|
|
callWithSub(localid, linkid, (sub) => {
|
|
sub.removeHolder(linkid);
|
|
switch (sub.holders.size) {
|
|
case 0:
|
|
this.peers.forEach((peer) => {
|
|
if (peer !== linkid) sendToLink(peer, W.Clear(localid));
|
|
});
|
|
break;
|
|
case 1:
|
|
sub.holders.forEach((peerEndpoint, peer) => { // only one, guaranteed ≠ linkid
|
|
sendToLink(peer, W.Clear(localid));
|
|
});
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
});
|
|
};
|
|
|
|
const removeMatch = (localid, captures, linkid) => {
|
|
callWithSub(localid, linkid, (sub) => {
|
|
const newMatchHolders = sub.removeMatch(captures, linkid);
|
|
switch (newMatchHolders.size) {
|
|
case 0:
|
|
sub.holders.forEach((peerEndpoint, peer) => {
|
|
if (peer !== linkid) sendToLink(peer, W.Del(peerEndpoint, captures));
|
|
});
|
|
break;
|
|
case 1: {
|
|
const peer = newMatchHolders.first(); // only one, guaranteed ≠ linkid
|
|
const peerEndpoint = sub.holders.get(peer, false);
|
|
if (peerEndpoint) sendToLink(peer, W.Del(peerEndpoint, captures));
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
});
|
|
};
|
|
|
|
during P.Envelope(managementScope, P.FederatedLink($linkid, scope)) {
|
|
const debug = debugFactory('syndicate/server:federation:link:' + linkid);
|
|
on start debug('+', scope.toString());
|
|
on stop debug('-', scope.toString());
|
|
on message P.Envelope(managementScope, P.FromPOA(linkid, $m)) debug('<', m.toString());
|
|
on message P.Envelope(managementScope, P.ToPOA(linkid, $m)) debug('>', m.toString());
|
|
|
|
assert P.Proposal(managementScope, P.FederatedLinkReady(linkid));
|
|
|
|
field this.linkSubs = Map();
|
|
field this.linkMatches = Map();
|
|
|
|
// const summarise = () => {
|
|
// console.log('----------------------------------------', scope);
|
|
// this.peers.forEach((peer) => console.log(' peer', peer));
|
|
// this.specs.forEach((localid, spec) => {
|
|
// console.log(' spec', spec.toString(), localid);
|
|
// const sub = this.subs.get(localid);
|
|
// sub.holders.forEach((peerEndpoint, peer) => {
|
|
// console.log(' sub', peer, peerEndpoint);
|
|
// });
|
|
// sub.matches.forEach((matchHolders, captures) => {
|
|
// console.log(' match', captures.toString(), matchHolders.toJSON());
|
|
// });
|
|
// });
|
|
// };
|
|
|
|
const err = (detail) => {
|
|
sendToLink(linkid, W.Err(detail));
|
|
currentFacet().stop();
|
|
};
|
|
|
|
on start {
|
|
this.peers = this.peers.add(linkid);
|
|
// console.log('+PEER', linkid, scope, this.peers);
|
|
this.specs.forEach((localid, spec) => {
|
|
sendToLink(linkid, W.Assert(localid, Observe(spec)));
|
|
});
|
|
// summarise();
|
|
}
|
|
|
|
on stop {
|
|
this.peers = this.peers.remove(linkid);
|
|
// console.log('-PEER', linkid, scope);
|
|
this.linkMatches.forEach((matches, localid) => {
|
|
matches.forEach((captures) => removeMatch(localid, captures, linkid));
|
|
});
|
|
this.linkSubs.forEach((localid, _endpointId) => {
|
|
unsubscribe(localid, linkid);
|
|
});
|
|
// summarise();
|
|
}
|
|
|
|
on message P.Envelope(managementScope, P.FromPOA(linkid, W.Assert($ep, Observe($spec)))) {
|
|
let localid = this.specs.get(spec, null);
|
|
let sub;
|
|
if (localid === null) {
|
|
localid = makeLocalId();
|
|
sub = new Subscription(localid, spec, scopeThis);
|
|
} else {
|
|
sub = this.subs.get(localid);
|
|
}
|
|
const oldHolderCount = sub.holders.size;
|
|
sub.addHolder(linkid, ep);
|
|
this.linkSubs = this.linkSubs.set(ep, sub.id);
|
|
switch (oldHolderCount) {
|
|
case 0:
|
|
this.peers.forEach((peer) => {
|
|
if (peer !== linkid) sendToLink(peer, W.Assert(localid, Observe(spec)));
|
|
});
|
|
break;
|
|
case 1:
|
|
sub.holders.forEach((peerEndpoint, peer) => { // now contains 2, one of which is us
|
|
if (peer !== linkid) sendToLink(peer, W.Assert(localid, Observe(spec)));
|
|
});
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
sub.matches.forEach((matchHolders, captures) => {
|
|
if (!matchHolders.remove(linkid).isEmpty()) {
|
|
sendToLink(linkid, W.Add(ep, captures));
|
|
}
|
|
});
|
|
// summarise();
|
|
}
|
|
|
|
on message P.Envelope(managementScope, P.FromPOA(linkid, W.Clear($ep))) {
|
|
const localid = this.linkSubs.get(ep, null);
|
|
if (localid === null) {
|
|
console.error("Ignoring mention of nonexistent endpoint", ep, linkid);
|
|
} else {
|
|
this.linkSubs = this.linkSubs.remove(ep);
|
|
unsubscribe(localid, linkid);
|
|
}
|
|
// summarise();
|
|
}
|
|
|
|
on message P.Envelope(managementScope, P.FromPOA(linkid, W.End($localid))) {
|
|
(this.linkMatches.get(localid) || Set()).forEach((captures) => {
|
|
removeMatch(localid, captures, linkid);
|
|
});
|
|
this.linkMatches = this.linkMatches.remove(localid);
|
|
// summarise();
|
|
}
|
|
|
|
on message P.Envelope(managementScope, P.FromPOA(linkid, W.Add($localid, $captures))) {
|
|
const matches = this.linkMatches.get(localid) || Set();
|
|
if (matches.includes(captures)) {
|
|
err(Symbol.for('duplicate-capture'));
|
|
} else {
|
|
this.linkMatches = this.linkMatches.set(localid, matches.add(captures));
|
|
callWithSub(localid, linkid, (sub) => {
|
|
const oldMatchHolders = sub.addMatch(captures, linkid);
|
|
switch (oldMatchHolders.size) {
|
|
case 0:
|
|
sub.holders.forEach((peerEndpoint, peer) => {
|
|
if (peer !== linkid) sendToLink(peer, W.Add(peerEndpoint, captures));
|
|
});
|
|
break;
|
|
case 1: {
|
|
const peer = oldMatchHolders.first(); // only one, guaranteed ≠ linkid
|
|
const peerEndpoint = sub.holders.get(peer, false);
|
|
if (peerEndpoint) sendToLink(peer, W.Add(peerEndpoint, captures));
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
});
|
|
}
|
|
// summarise();
|
|
}
|
|
|
|
on message P.Envelope(managementScope, P.FromPOA(linkid, W.Del($localid, $captures))) {
|
|
const matches = this.linkMatches.get(localid) || Set();
|
|
if (!matches.includes(captures)) {
|
|
err(Symbol.for('nonexistent-capture'));
|
|
} else {
|
|
const newMatches = matches.remove(captures);
|
|
this.linkMatches = (newMatches.isEmpty())
|
|
? this.linkMatches.remove(localid)
|
|
: this.linkMatches.set(localid, newMatches);
|
|
removeMatch(localid, captures, linkid);
|
|
}
|
|
// summarise();
|
|
}
|
|
|
|
on message P.Envelope(managementScope, P.FromPOA(linkid, W.Msg($localid, $captures))) {
|
|
callWithSub(localid, linkid, (sub) => {
|
|
sub.holders.forEach((peerEndpoint, peer) => {
|
|
if (peer !== linkid) sendToLink(peer, W.Msg(peerEndpoint, captures));
|
|
});
|
|
});
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|