com.epam.eco.kafkamanager.ui.metrics.MetricsStateController Maven / Gradle / Ivy

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 *  Copyright 2022 EPAM Systems
 *
 *  Licensed 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.
 *******************************************************************************/
package com.epam.eco.kafkamanager.ui.metrics;

import java.util.Collections;
import java.util.Map;
import java.util.TreeMap;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.actuate.metrics.MetricsEndpoint;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.epam.eco.kafkamanager.utils.MapperUtils;

/**
 * @author Andrei_Tytsik
 */
@Controller
public class MetricsStateController {

    public static final String VIEW = "metrics_state";
    public static final String ATTR_STATE = "state";

    @Autowired
    private MetricsEndpoint metricsEndpoint;

    @RequestMapping(value="/metrics_state", method=RequestMethod.GET)
    public String state(Model model) throws Exception {
        Map state = new TreeMap<>();
        metricsEndpoint.listNames().getNames().forEach(name -> {
            MetricsEndpoint.MetricDescriptor metric = metricsEndpoint.metric(name, Collections.emptyList());
            state.put(name, metric);
        });
        model.addAttribute(ATTR_STATE, MapperUtils.toPrettyJson(state));
        return VIEW;
    }

}