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JS: Fix transparent caching of ledger entries.

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This commit is contained in:
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 request = new Request(this, 'ledger_entry');
if (type)
this.type = type;
// Transparent caching. When .request() is invoked, look in the Remote object for the result.
// If not found, listen, cache result, and emit it.
//
// Transparent caching:
this.request_default = this.request;
this.request = function () { // Intercept default 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 ('account_root' === type) {
request.request_default = request.request;
if (!cache)
{
cache = self.ledgers.current.account_root = {};
}
request.request = function () { // Intercept default request.
// .self = Remote
// this = Request
var node = self.ledgers.current.account_root[request.message.account_root];
// console.log('request_ledger_entry: caught');
if (node) {
// Emulate fetch of ledger entry.
self.emit('success', {
// YYY Missing lots of fields.
'node' : node,
});
}
else {
// Was not cached.
// if (self._ledger_hash) {
// // XXX Add caching.
// }
// else if (req.ledger_index)
// else if ('ripple_state' === request.type) // YYY Could be cached per ledger.
if ('account_root' === type) {
var cache = self.ledgers.current.account_root;
// XXX Only allow with trusted mode. Must sync response with advance.
switch (response.type) {
case '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.
if (!cache)
{
cache = self.ledgers.current.account_root = {};
}
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();
}
}
}
};