/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * 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.alibaba.nacos.client.config.http;

import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.client.monitor.MetricsMonitor;
import com.alibaba.nacos.common.http.HttpRestResult;
import io.prometheus.client.Histogram;

import java.io.IOException;
import java.util.Map;

/**
 * MetricsHttpAgent.
 *
 * @author Nacos
 */
public class MetricsHttpAgent implements HttpAgent {
    
    private final HttpAgent httpAgent;
    
    public MetricsHttpAgent(HttpAgent httpAgent) {
        this.httpAgent = httpAgent;
    }
    
    @Override
    public void start() throws NacosException {
        httpAgent.start();
    }
    
    @Override
    public HttpRestResult<String> httpGet(String path, Map<String, String> headers, Map<String, String> paramValues,
            String encode, long readTimeoutMs) throws Exception {
        Histogram.Timer timer = MetricsMonitor.getConfigRequestMonitor("GET", path, "NA");
        HttpRestResult<String> result;
        try {
            result = httpAgent.httpGet(path, headers, paramValues, encode, readTimeoutMs);
        } catch (IOException e) {
            throw e;
        } finally {
            timer.observeDuration();
            timer.close();
        }
        
        return result;
    }
    
    @Override
    public HttpRestResult<String> httpPost(String path, Map<String, String> headers, Map<String, String> paramValues,
            String encode, long readTimeoutMs) throws Exception {
        Histogram.Timer timer = MetricsMonitor.getConfigRequestMonitor("POST", path, "NA");
        HttpRestResult<String> result;
        try {
            result = httpAgent.httpPost(path, headers, paramValues, encode, readTimeoutMs);
        } catch (IOException e) {
            throw e;
        } finally {
            timer.observeDuration();
            timer.close();
        }
        
        return result;
    }
    
    @Override
    public HttpRestResult<String> httpDelete(String path, Map<String, String> headers, Map<String, String> paramValues,
            String encode, long readTimeoutMs) throws Exception {
        Histogram.Timer timer = MetricsMonitor.getConfigRequestMonitor("DELETE", path, "NA");
        HttpRestResult<String> result;
        try {
            result = httpAgent.httpDelete(path, headers, paramValues, encode, readTimeoutMs);
        } catch (IOException e) {
            
            throw e;
        } finally {
            timer.observeDuration();
            timer.close();
        }
        
        return result;
    }
    
    @Override
    public String getName() {
        return httpAgent.getName();
    }
    
    @Override
    public String getNamespace() {
        return httpAgent.getNamespace();
    }
    
    @Override
    public String getTenant() {
        return httpAgent.getTenant();
    }
    
    @Override
    public String getEncode() {
        return httpAgent.getEncode();
    }
    
    @Override
    public void shutdown() throws NacosException {
        httpAgent.shutdown();
    }
}


@@ -1809,35 +1809,8 @@
 ();%0A
-            timer.close();%0A
     
@@ -1807,32 +1807,32 @@
 on();%0A        %7D%0A
+
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@@ -2409,35 +2409,8 @@
 ();%0A
-            timer.close();%0A
     
@@ -2937,21 +2937,8 @@
 ) %7B%0A
-            %0A
     
@@ -2966,32 +2966,32 @@
     %7D finally %7B%0A
+
             time
@@ -3015,35 +3015,8 @@
 ();%0A
-            timer.close();%0A
     

fix MetricsHttpAgent metrics twice (#5029)