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function FlowStore(endpoint) {
this._views = [];
this.reset();
}
_.extend(FlowStore.prototype, {
add: function (flow) {
this._pos_map[flow.id] = this._flow_list.length;
this._flow_list.push(flow);
for (var i = 0; i < this._views.length; i++) {
this._views[i].add(flow);
}
},
update: function (flow) {
this._flow_list[this._pos_map[flow.id]] = flow;
for (var i = 0; i < this._views.length; i++) {
this._views[i].update(flow);
}
},
remove: function (flow_id) {
this._flow_list.splice(this._pos_map[flow_id], 1);
this._build_map();
for (var i = 0; i < this._views.length; i++) {
this._views[i].remove(flow_id);
}
},
reset: function (flows) {
this._flow_list = flows || [];
this._build_map();
for (var i = 0; i < this._views.length; i++) {
this._views[i].recalculate(this._flow_list);
}
},
_build_map: function () {
this._pos_map = {};
for (var i = 0; i < this._flow_list.length; i++) {
var flow = this._flow_list[i];
this._pos_map[flow.id] = i;
}
},
get: function (flow_id) {
return this._flow_list[this._pos_map[flow_id]];
}
});
function LiveFlowStore(endpoint) {
FlowStore.call(this);
this.updates_before_init = []; // (empty array is true in js)
this.endpoint = endpoint || "/flows";
this.conn = new Connection(this.endpoint + "/updates");
this.conn.onopen = this._onopen.bind(this);
this.conn.onmessage = function (e) {
var message = JSON.parse(e.data);
this.handle_update(message.type, message.data);
}.bind(this);
}
_.extend(LiveFlowStore.prototype, FlowStore.prototype, {
close: function () {
this.conn.close();
},
add: function (flow) {
// Make sure that deferred adds don't add an element twice.
if (!this._pos_map[flow.id]) {
FlowStore.prototype.add.call(this, flow);
}
},
handle_update: function (type, data) {
console.log("LiveFlowStore.handle_update", type, data);
if (this.updates_before_init) {
console.log("defer update", type, data);
this.updates_before_init.push(arguments);
} else {
this[type](data);
}
},
handle_fetch: function (data) {
console.log("Flows fetched.");
this.reset(data.flows);
var updates = this.updates_before_init;
this.updates_before_init = false;
for (var i = 0; i < updates.length; i++) {
this.handle_update.apply(this, updates[i]);
}
},
_onopen: function () {
//Update stream openend, fetch list of flows.
console.log("Update Connection opened, fetching flows...");
$.getJSON(this.endpoint, this.handle_fetch.bind(this));
},
});
function SortByInsertionOrder() {
this.i = 0;
this.map = {};
this.key = this.key.bind(this);
}
SortByInsertionOrder.prototype.key = function (flow) {
if (!(flow.id in this.map)) {
this.i++;
this.map[flow.id] = this.i;
}
return this.map[flow.id];
};
var default_sort = (new SortByInsertionOrder()).key;
function FlowView(store, filt, sortfun) {
EventEmitter.call(this);
filt = filt || function (flow) {
return true;
};
sortfun = sortfun || default_sort;
this.store = store;
this.store._views.push(this);
this.recalculate(this.store._flow_list, filt, sortfun);
}
_.extend(FlowView.prototype, EventEmitter.prototype, {
close: function () {
this.store._views = _.without(this.store._views, this);
},
recalculate: function (flows, filt, sortfun) {
if (filt) {
this.filt = filt;
}
if (sortfun) {
this.sortfun = sortfun;
}
//Ugly workaround: Call .sortfun() for each flow once in order,
//so that SortByInsertionOrder make sense.
var i = flows.length;
while(i--){
this.sortfun(flows[i]);
}
this.flows = flows.filter(this.filt);
this.flows.sort(function (a, b) {
return this.sortfun(b) - this.sortfun(a);
}.bind(this));
this.emit("recalculate");
},
add: function (flow) {
if (this.filt(flow)) {
var idx = _.sortedIndex(this.flows, flow, this.sortfun);
if (idx === this.flows.length) { //happens often, .push is way faster.
this.flows.push(flow);
} else {
this.flows.splice(idx, 0, flow);
}
this.emit("add", flow, idx);
}
},
update: function (flow) {
var idx;
var i = this.flows.length;
// Search from the back, we usually update the latest flows.
while (i--) {
if (this.flows[i].id === flow.id) {
idx = i;
break;
}
}
if (idx === -1) { //not contained in list
this.add(flow);
} else if (!this.filt(flow)) {
this.remove(flow.id);
} else {
if (this.sortfun(this.flows[idx]) !== this.sortfun(flow)) { //sortpos has changed
this.remove(this.flows[idx]);
this.add(flow);
} else {
this.flows[idx] = flow;
this.emit("update", flow, idx);
}
}
},
remove: function (flow_id) {
var i = this.flows.length;
while (i--) {
if (this.flows[i].id === flow_id) {
this.flows.splice(i, 1);
this.emit("remove", flow_id, i);
break;
}
}
}
});
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