frontend/src/App.js

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import React, {useState, useEffect} from 'react';
import logo from './logo.svg';
import './App.css';

function App() {
    const [message, setMessage] = useState("");

    useEffect(() => {
        fetch('cluster/list.query')
            .then(response => response.text())
            .then(message => {
                setMessage(message);
            });
    }, [])


    return (
        <div className="App">
            <header className="App-header">
                <img src={logo} className="App-logo" alt="logo" height="60"/>
                <p>
                    Edit <code>src/App.js</code> and save to reload.
                </p>
            </header>
            <h1>ClusterInfo</h1>
            <p>
                {message}
            </p>
        </div>
    );
}

export default App;