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QueryAutoRefresh.jsx
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QueryAutoRefresh.jsx
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import React from 'react';
import PropTypes from 'prop-types';
import { bindActionCreators } from 'redux';
import { connect } from 'react-redux';
import * as Actions from '../actions';
const $ = require('jquery');
const QUERY_UPDATE_FREQ = 2000;
const QUERY_UPDATE_BUFFER_MS = 5000;
class QueryAutoRefresh extends React.PureComponent {
componentWillMount() {
this.startTimer();
}
componentWillUnmount() {
this.stopTimer();
}
shouldCheckForQueries() {
// if there are started or running queries, this method should return true
const { queries } = this.props;
const queryKeys = Object.keys(queries);
const queriesAsArray = queryKeys.map(key => queries[key]);
return queriesAsArray.some(q =>
['running', 'started', 'pending', 'fetching'].indexOf(q.state) >= 0);
}
startTimer() {
if (!(this.timer)) {
this.timer = setInterval(this.stopwatch.bind(this), QUERY_UPDATE_FREQ);
}
}
stopTimer() {
clearInterval(this.timer);
this.timer = null;
}
stopwatch() {
// only poll /superset/queries/ if there are started or running queries
if (this.shouldCheckForQueries()) {
const url = `/superset/queries/${this.props.queriesLastUpdate - QUERY_UPDATE_BUFFER_MS}`;
$.getJSON(url, (data) => {
if (Object.keys(data).length > 0) {
this.props.actions.refreshQueries(data);
}
});
}
}
render() {
return null;
}
}
QueryAutoRefresh.propTypes = {
queries: PropTypes.object.isRequired,
actions: PropTypes.object.isRequired,
queriesLastUpdate: PropTypes.number.isRequired,
};
function mapStateToProps(state) {
return {
queries: state.queries,
queriesLastUpdate: state.queriesLastUpdate,
};
}
function mapDispatchToProps(dispatch) {
return {
actions: bindActionCreators(Actions, dispatch),
};
}
export default connect(mapStateToProps, mapDispatchToProps)(QueryAutoRefresh);