cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/config/DmiWebClientConfiguration.java

   1 /*
   2  * ============LICENSE_START=======================================================
   3  *  Copyright (C) 2024 Nordix Foundation.
   4  * ================================================================================
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *      http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  *
  17  * SPDX-License-Identifier: Apache-2.0
  18  * ============LICENSE_END=========================================================
  19  */
  20
  21 package org.onap.cps.ncmp.api.impl.config;
  22
  23 import io.netty.channel.ChannelOption;
  24 import io.netty.handler.timeout.ReadTimeoutHandler;
  25 import io.netty.handler.timeout.WriteTimeoutHandler;
  26 import java.util.concurrent.TimeUnit;
  27 import lombok.RequiredArgsConstructor;
  28 import org.springframework.context.annotation.Bean;
  29 import org.springframework.context.annotation.Configuration;
  30 import org.springframework.http.HttpHeaders;
  31 import org.springframework.http.MediaType;
  32 import org.springframework.http.client.reactive.ReactorClientHttpConnector;
  33 import org.springframework.web.reactive.function.client.WebClient;
  34 import reactor.netty.http.client.HttpClient;
  35 import reactor.netty.resources.ConnectionProvider;
  36
  37 /**
  38  * Configures and creates a WebClient bean that triggers an initialization (warmup) of the host name resolver and
  39  * loads the necessary native libraries to avoid the extra time needed to load resources for first request.
  40  */
  41 @Configuration
  42 @RequiredArgsConstructor
  43 public class DmiWebClientConfiguration {
  44
  45     private final HttpClientConfiguration httpClientConfiguration;
  46
  47     /**
  48      * Configures and create a WebClient bean for DMI data service.
  49      *
  50      * @return a WebClient instance for data services.
  51      */
  52     @Bean
  53     public WebClient dataServicesWebClient() {
  54         final HttpClientConfiguration.DataServices httpClientConfiguration
  55                 = this.httpClientConfiguration.getDataServices();
  56
  57         final HttpClient httpClient = createHttpClient("dataConnectionPool",
  58                 httpClientConfiguration.getMaximumConnectionsTotal(),
  59                 httpClientConfiguration.getConnectionTimeoutInSeconds(),
  60                 httpClientConfiguration.getReadTimeoutInSeconds(),
  61                 httpClientConfiguration.getWriteTimeoutInSeconds());
  62         return buildAndGetWebClient(httpClient, httpClientConfiguration.getMaximumInMemorySizeInMegabytes());
  63     }
  64
  65     /**
  66      * Configures and creates a WebClient bean for DMI model service.
  67      *
  68      * @return a WebClient instance for model services.
  69      */
  70     @Bean
  71     public WebClient modelServicesWebClient() {
  72         final HttpClientConfiguration.ModelServices httpClientConfiguration
  73                 = this.httpClientConfiguration.getModelServices();
  74
  75         final HttpClient httpClient = createHttpClient("modelConnectionPool",
  76                 httpClientConfiguration.getMaximumConnectionsTotal(),
  77                 httpClientConfiguration.getConnectionTimeoutInSeconds(),
  78                 httpClientConfiguration.getReadTimeoutInSeconds(),
  79                 httpClientConfiguration.getWriteTimeoutInSeconds());
  80         return buildAndGetWebClient(httpClient, httpClientConfiguration.getMaximumInMemorySizeInMegabytes());
  81     }
  82
  83     /**
  84      * Configures and creates a WebClient bean for DMI health service.
  85      *
  86      * @return a WebClient instance for health checks.
  87      */
  88     @Bean
  89     public WebClient healthChecksWebClient() {
  90         final HttpClientConfiguration.HealthCheckServices httpClientConfiguration
  91                 = this.httpClientConfiguration.getHealthCheckServices();
  92
  93         final HttpClient httpClient = createHttpClient("healthConnectionPool",
  94                 httpClientConfiguration.getMaximumConnectionsTotal(),
  95                 httpClientConfiguration.getConnectionTimeoutInSeconds(),
  96                 httpClientConfiguration.getReadTimeoutInSeconds(),
  97                 httpClientConfiguration.getWriteTimeoutInSeconds());
  98         return buildAndGetWebClient(httpClient, httpClientConfiguration.getMaximumInMemorySizeInMegabytes());
  99     }
 100
 101     private static HttpClient createHttpClient(final String connectionProviderName,
 102                                                final Integer maximumConnectionsTotal,
 103                                                final Integer connectionTimeoutInSeconds,
 104                                                final Integer readTimeoutInSeconds,
 105                                                final Integer writeTimeoutInSeconds) {
 106         final ConnectionProvider dmiWebClientConnectionProvider = ConnectionProvider.create(connectionProviderName,
 107                 maximumConnectionsTotal);
 108
 109         final HttpClient httpClient = HttpClient.create(dmiWebClientConnectionProvider)
 110                 .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, connectionTimeoutInSeconds * 1000)
 111                 .doOnConnected(connection -> connection.addHandlerLast(new ReadTimeoutHandler(readTimeoutInSeconds,
 112                         TimeUnit.SECONDS)).addHandlerLast(new WriteTimeoutHandler(writeTimeoutInSeconds,
 113                         TimeUnit.SECONDS)));
 114         httpClient.warmup().block();
 115         return httpClient;
 116     }
 117
 118     private static WebClient buildAndGetWebClient(final HttpClient httpClient,
 119                                                   final Integer maximumInMemorySizeInMegabytes) {
 120         return WebClient.builder()
 121                 .defaultHeaders(header -> header.set(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE))
 122                 .defaultHeaders(header -> header.set(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE))
 123                 .clientConnector(new ReactorClientHttpConnector(httpClient))
 124                 .codecs(configurer -> configurer.defaultCodecs().maxInMemorySize(
 125                         maximumInMemorySizeInMegabytes * 1024 * 1024)).build();
 126     }
 127 }