| /* |
| * 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.common.rest.filter; |
| |
| import java.util.List; |
| import java.util.concurrent.CompletableFuture; |
| |
| import org.apache.servicecomb.core.Invocation; |
| import org.apache.servicecomb.foundation.vertx.http.HttpServletRequestEx; |
| |
| public class HttpClientFilterBeforeSendRequestExecutor { |
| private final List<HttpClientFilter> httpClientFilters; |
| |
| private final Invocation invocation; |
| |
| private final HttpServletRequestEx requestEx; |
| |
| private int currentIndex; |
| |
| private final CompletableFuture<Void> future = new CompletableFuture<>(); |
| |
| public HttpClientFilterBeforeSendRequestExecutor(List<HttpClientFilter> httpClientFilters, Invocation invocation, |
| HttpServletRequestEx requestEx) { |
| this.httpClientFilters = httpClientFilters; |
| this.invocation = invocation; |
| this.requestEx = requestEx; |
| } |
| |
| public CompletableFuture<Void> run() { |
| doRun(); |
| |
| return future; |
| } |
| |
| protected CompletableFuture<Void> safeInvoke(HttpClientFilter httpClientFilter) { |
| try { |
| if (httpClientFilter.enabled()) { |
| CompletableFuture<Void> future = httpClientFilter.beforeSendRequestAsync(invocation, requestEx); |
| if (future == null) { |
| future = new CompletableFuture<>(); |
| future.completeExceptionally(new IllegalStateException( |
| "HttpClientFilter beforeSendRequestAsync can not return null, do not override it. Class=" |
| + httpClientFilter.getClass() |
| .getName())); |
| } |
| return future; |
| } else { |
| CompletableFuture<Void> eFuture = new CompletableFuture<>(); |
| eFuture.complete(null); |
| return eFuture; |
| } |
| } catch (Throwable e) { |
| CompletableFuture<Void> eFuture = new CompletableFuture<>(); |
| eFuture.completeExceptionally(e); |
| return eFuture; |
| } |
| } |
| |
| protected void doRun() { |
| if (currentIndex == httpClientFilters.size()) { |
| future.complete(null); |
| return; |
| } |
| |
| HttpClientFilter httpServerFilter = httpClientFilters.get(currentIndex); |
| currentIndex++; |
| |
| CompletableFuture<Void> stepFuture = safeInvoke(httpServerFilter); |
| stepFuture.whenComplete((v, e) -> { |
| if (e == null) { |
| doRun(); |
| return; |
| } |
| |
| future.completeExceptionally(e); |
| }); |
| } |
| } |