content: /*
   * Copyright 1999-2020 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
   *
   *      https://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.csp.sentinel.adapter.jaxrs;
  
  import com.alibaba.csp.sentinel.*;
  import com.alibaba.csp.sentinel.adapter.jaxrs.config.SentinelJaxRsConfig;
  import com.alibaba.csp.sentinel.adapter.jaxrs.future.FutureWrapper;
  import com.alibaba.csp.sentinel.slots.block.BlockException;
  import com.alibaba.csp.sentinel.util.function.Supplier;
  
  import javax.ws.rs.core.Response;
  import java.util.concurrent.Future;
  
  
  /**
   * wrap jax-rs client execution with sentinel
   * <pre>
   *         Response response = SentinelJaxRsClientTemplate.execute(resourceName, new Supplier<Response>() {
   *
   *             @Override
   *             public Response get() {
   *                 return client.target(host).path(url).request()
   *                         .get();
   *             }
   *         });
   * </pre>
   * @author sea
   */
  public class SentinelJaxRsClientTemplate {
  
      /**
       * execute supplier with sentinel
       * @param resourceName
       * @param supplier
       * @return
       */
      public static Response execute(String resourceName, Supplier<Response> supplier) {
          Entry entry = null;
          try {
              entry = SphU.entry(resourceName, ResourceTypeConstants.COMMON_WEB, EntryType.OUT);
              return supplier.get();
          } catch (BlockException ex) {
              return SentinelJaxRsConfig.getJaxRsFallback().fallbackResponse(resourceName, ex);
          } finally {
              System.out.println("entry exit");
              if (entry != null) {
                  entry.exit();
              }
          }
      }
  
      /**
       * execute supplier with sentinel
       * @param resourceName
       * @param supplier
       * @return
       */
      public static Future<Response> executeAsync(String resourceName, Supplier<Future<Response>> supplier) {
          try {
              AsyncEntry entry = SphU.asyncEntry(resourceName, ResourceTypeConstants.COMMON_WEB, EntryType.OUT);
              return new FutureWrapper<>(entry, supplier.get());
          } catch (BlockException ex) {
              return SentinelJaxRsConfig.getJaxRsFallback().fallbackFutureResponse(resourceName, ex);
          }
      }
  }
  