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
   *
   *      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.csp.sentinel.annotation.cdi.interceptor;
  
  import com.alibaba.csp.sentinel.Entry;
  import com.alibaba.csp.sentinel.EntryType;
  import com.alibaba.csp.sentinel.SphU;
  import com.alibaba.csp.sentinel.slots.block.BlockException;
  
  import javax.annotation.Priority;
  import javax.interceptor.AroundInvoke;
  import javax.interceptor.Interceptor;
  import javax.interceptor.InvocationContext;
  
  /**
   * @author sea
   * @since 1.8.0
   */
  @Interceptor
  @SentinelResourceBinding
  @Priority(0)
  public class SentinelResourceInterceptor extends AbstractSentinelInterceptorSupport {
  
      @AroundInvoke
      Object aroundInvoke(InvocationContext ctx) throws Throwable {
          SentinelResourceBinding annotation = ctx.getMethod().getAnnotation(SentinelResourceBinding.class);
          if (annotation == null) {
              // Should not go through here.
              throw new IllegalStateException("Wrong state for SentinelResource annotation");
          }
  
          String resourceName = getResourceName(annotation.value(), ctx.getMethod());
          EntryType entryType = annotation.entryType();
          int resourceType = annotation.resourceType();
          Entry entry = null;
          try {
              entry = SphU.entry(resourceName, resourceType, entryType, ctx.getParameters());
              Object result = ctx.proceed();
              return result;
          } catch (BlockException ex) {
              return handleBlockException(ctx, annotation, ex);
          } catch (Throwable ex) {
              Class<? extends Throwable>[] exceptionsToIgnore = annotation.exceptionsToIgnore();
              // The ignore list will be checked first.
              if (exceptionsToIgnore.length > 0 && exceptionBelongsTo(ex, exceptionsToIgnore)) {
                  throw ex;
              }
              if (exceptionBelongsTo(ex, annotation.exceptionsToTrace())) {
                  traceException(ex);
                  return handleFallback(ctx, annotation, ex);
              }
  
              // No fallback function can handle the exception, so throw it out.
              throw ex;
          } finally {
              if (entry != null) {
                  entry.exit(1, ctx.getParameters());
              }
          }
      }
  }
  