reverse caching: middleware
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@ -23,6 +23,7 @@ import SignerMiddleware from './providers/signerMiddleware';
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import statusMiddleware from '~/views/Status/middleware';
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import CertificationsMiddleware from './providers/certifications/middleware';
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import ChainMiddleware from './providers/chainMiddleware';
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import RegistryMiddleware from './providers/registry/middleware';
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export default function (api, browserHistory) {
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const errors = new ErrorsMiddleware();
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@ -32,13 +33,15 @@ export default function (api, browserHistory) {
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const certifications = new CertificationsMiddleware();
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const routeMiddleware = routerMiddleware(browserHistory);
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const chain = new ChainMiddleware();
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const registry = new RegistryMiddleware();
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const middleware = [
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settings.toMiddleware(),
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signer.toMiddleware(),
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errors.toMiddleware(),
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certifications.toMiddleware(),
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chain.toMiddleware()
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chain.toMiddleware(),
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registry.toMiddleware()
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];
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return middleware.concat(status, routeMiddleware, thunk);
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106
js/src/redux/providers/registry/middleware.js
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106
js/src/redux/providers/registry/middleware.js
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@ -0,0 +1,106 @@
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// Copyright 2015, 2016 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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import Contracts from '~/contracts';
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import subscribeToEvent from '~/util/subscribe-to-event';
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import registryABI from '~/contracts/abi/registry.json';
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import { setReverse, startCachingReverses } from './actions';
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export default class RegistryMiddleware {
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toMiddleware () {
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return (store) => {
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const api = Contracts.get()._api;
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let contract, confirmedEvents, removedEvents, interval;
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let addressesToCheck = {};
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const onLog = (log) => {
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switch (log.event) {
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case 'ReverseConfirmed':
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addressesToCheck[log.params.reverse.value] = true;
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break;
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case 'ReverseRemoved':
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delete addressesToCheck[log.params.reverse.value];
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break;
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}
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};
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const checkReverses = () => {
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Object
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.keys(addressesToCheck)
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.forEach((address) => {
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contract
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.instance
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.reverse
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.call({}, [ address ])
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.then((reverse) => store.dispatch(setReverse(address, reverse)));
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});
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addressesToCheck = {};
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};
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return (next) => (action) => {
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switch (action.type) {
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case 'initAll':
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next(action);
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store.dispatch(startCachingReverses());
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break;
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case 'startCachingReverses':
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const { registry } = Contracts.get();
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registry.getInstance()
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.then((instance) => api.newContract(registryABI, instance.address))
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.then((_contract) => {
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contract = _contract;
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confirmedEvents = subscribeToEvent(_contract, 'ReverseConfirmed');
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confirmedEvents.on('log', onLog);
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removedEvents = subscribeToEvent(_contract, 'ReverseRemoved');
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removedEvents.on('log', onLog);
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interval = setInterval(checkReverses, 2000);
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})
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.catch((err) => {
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console.error('Failed to start caching reverses:', err);
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throw err;
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});
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break;
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case 'stopCachingReverses':
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if (confirmedEvents) {
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confirmedEvents.unsubscribe();
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}
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if (removedEvents) {
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removedEvents.unsubscribe();
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}
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if (interval) {
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clearInterval(interval);
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}
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break;
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default:
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next(action);
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}
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};
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};
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}
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};
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