providers/provider-springmvc/src/main/java/org/apache/servicecomb/provider/springmvc/reference/async/CseAsyncRestTemplate.java

/*
 * 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.
 */

package org.apache.servicecomb.provider.springmvc.reference.async;

import java.lang.reflect.Type;
import java.util.Arrays;

import org.apache.servicecomb.provider.springmvc.reference.CseHttpMessageConverter;
import org.apache.servicecomb.provider.springmvc.reference.CseRestTemplate;
import org.apache.servicecomb.provider.springmvc.reference.CseUriTemplateHandler;
import org.springframework.core.task.SimpleAsyncTaskExecutor;
import org.springframework.http.HttpEntity;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;

@SuppressWarnings("deprecation")
// AsyncRestTemplate is deprecated by spring 5, using RPC with CompletableFuture instead.
// Keep this function is only for compatibility, and maybe removed in future.
public class CseAsyncRestTemplate extends org.springframework.web.client.AsyncRestTemplate {
  public CseAsyncRestTemplate() {
    super(createSimpleClientHttpRequestFactory(), createRestTemplate());
    setMessageConverters(Arrays.asList(new CseHttpMessageConverter()));
    setAsyncRequestFactory(new CseAsyncClientHttpRequestFactory());
    setUriTemplateHandler(new CseUriTemplateHandler());
  }

  private static SimpleClientHttpRequestFactory createSimpleClientHttpRequestFactory() {
    SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
    requestFactory.setTaskExecutor(new SimpleAsyncTaskExecutor());
    return requestFactory;
  }

  private static RestTemplate createRestTemplate() {
    return new CseRestTemplate();
  }

  @Override
  protected <T> org.springframework.web.client.AsyncRequestCallback httpEntityCallback(HttpEntity<T> requestBody) {
    return new CseAsyncRequestCallback<T>(requestBody);
  }

  @Override
  protected <T> org.springframework.web.client.AsyncRequestCallback httpEntityCallback(HttpEntity<T> requestBody,
      Type responseType) {
    return new CseAsyncRequestCallback<T>(requestBody);
  }
}