rxdb
Version:
A local-first realtime NoSQL Database for JavaScript applications - https://rxdb.info/
52 lines (51 loc) • 2.23 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.OPEN_REMOTE_MESSAGE_CHANNELS = exports.MESSAGE_CHANNEL_CACHE_BY_IDENTIFIER = exports.CACHE_ITEM_BY_MESSAGE_CHANNEL = void 0;
exports.closeMessageChannel = closeMessageChannel;
exports.getMessageChannel = getMessageChannel;
var _index = require("../utils/index.js");
var MESSAGE_CHANNEL_CACHE_BY_IDENTIFIER = exports.MESSAGE_CHANNEL_CACHE_BY_IDENTIFIER = new Map();
var CACHE_ITEM_BY_MESSAGE_CHANNEL = exports.CACHE_ITEM_BY_MESSAGE_CHANNEL = new WeakMap();
var OPEN_REMOTE_MESSAGE_CHANNELS = exports.OPEN_REMOTE_MESSAGE_CHANNELS = new Set();
function getMessageChannelCache(identifier) {
return (0, _index.getFromMapOrCreate)(MESSAGE_CHANNEL_CACHE_BY_IDENTIFIER, identifier, () => new Map());
}
function getMessageChannel(settings, cacheKeys, keepAlive = false) {
var cacheKey = getCacheKey(settings, cacheKeys);
var cacheItem = (0, _index.getFromMapOrCreate)(getMessageChannelCache(settings.identifier), cacheKey, () => {
var newCacheItem = {
identifier: settings.identifier,
cacheKey,
keepAlive,
refCount: 1,
messageChannel: settings.messageChannelCreator().then(messageChannel => {
OPEN_REMOTE_MESSAGE_CHANNELS.add(messageChannel);
CACHE_ITEM_BY_MESSAGE_CHANNEL.set(messageChannel, newCacheItem);
return messageChannel;
})
};
return newCacheItem;
}, existingCacheItem => {
existingCacheItem.refCount = existingCacheItem.refCount + 1;
});
return cacheItem.messageChannel;
}
function closeMessageChannel(messageChannel) {
var cacheItem = (0, _index.getFromMapOrThrow)(CACHE_ITEM_BY_MESSAGE_CHANNEL, messageChannel);
cacheItem.refCount = cacheItem.refCount - 1;
if (cacheItem.refCount === 0 && !cacheItem.keepAlive) {
getMessageChannelCache(cacheItem.identifier).delete(cacheItem.cacheKey);
OPEN_REMOTE_MESSAGE_CHANNELS.delete(messageChannel);
return messageChannel.close();
} else {
return _index.PROMISE_RESOLVE_VOID;
}
}
function getCacheKey(settings, cacheKeys) {
cacheKeys = cacheKeys.slice(0);
cacheKeys.unshift(settings.identifier);
return cacheKeys.join('||');
}
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