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JS: Fix transparent caching of ledger entries.

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Arthur Britto
2012-11-29 15:33:23 -08:00
committed by Stefan Thomas
parent 8cb65c7d28
commit 0d52f87c8b
1 changed files with 50 additions and 38 deletions
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88
src/js/remote.js
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@@ -584,51 +584,63 @@ Remote.prototype.request_ledger_entry = function (type) {
var self = this; var self = this;
var request = new Request(this, 'ledger_entry'); var request = new Request(this, 'ledger_entry');
if (type) // Transparent caching. When .request() is invoked, look in the Remote object for the result.
this.type = type; // If not found, listen, cache result, and emit it.
//
// Transparent caching: // Transparent caching:
this.request_default = this.request; if ('account_root' === type) {
this.request = function () { // Intercept default request. request.request_default = request.request;
if (self._ledger_hash) {
// XXX Add caching.
}
// else if (req.ledger_index)
// else if ('ripple_state' === this.type) // YYY Could be cached per ledger.
else if ('account_root' === this.type) {
var cache = self.ledgers.current.account_root;
if (!cache) request.request = function () { // Intercept default request.
{ // .self = Remote
cache = self.ledgers.current.account_root = {}; // this = Request
}
var node = self.ledgers.current.account_root[request.message.account_root]; // console.log('request_ledger_entry: caught');
if (node) { // if (self._ledger_hash) {
// Emulate fetch of ledger entry. // // XXX Add caching.
self.emit('success', { // }
// YYY Missing lots of fields. // else if (req.ledger_index)
'node' : node, // else if ('ripple_state' === request.type) // YYY Could be cached per ledger.
}); if ('account_root' === type) {
} var cache = self.ledgers.current.account_root;
else {
// Was not cached.
// XXX Only allow with trusted mode. Must sync response with advance. if (!cache)
switch (response.type) { {
case 'account_root': cache = self.ledgers.current.account_root = {};
request.on('success', function (message) {
// Cache node.
self.ledgers.current.account_root[message.node.Account] = message.node;
});
break;
default:
// This type not cached.
} }
this.request_default(); var node = self.ledgers.current.account_root[request.message.account_root];
if (node) {
// Emulate fetch of ledger entry.
// console.log('request_ledger_entry: emulating');
request.emit('success', {
// YYY Missing lots of fields.
'node' : node,
});
}
else {
// Was not cached.
// XXX Only allow with trusted mode. Must sync response with advance.
switch (type) {
case 'account_root':
request.on('success', function (message) {
// Cache node.
// console.log('request_ledger_entry: caching');
self.ledgers.current.account_root[message.node.Account] = message.node;
});
break;
default:
// This type not cached.
// console.log('request_ledger_entry: non-cached type');
}
// console.log('request_ledger_entry: invoking');
request.request_default();
}
} }
} }
}; };