| /* |
| * 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.meecrowave.proxy.servlet.front.cdi; |
| |
| import static java.util.function.Function.identity; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.CompletionStage; |
| import java.util.function.Function; |
| |
| import javax.enterprise.event.Event; |
| import javax.inject.Inject; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import javax.ws.rs.core.Response; |
| |
| import org.apache.meecrowave.proxy.servlet.configuration.Routes; |
| import org.apache.meecrowave.proxy.servlet.front.ProxyServlet; |
| import org.apache.meecrowave.proxy.servlet.front.cdi.event.AfterResponse; |
| import org.apache.meecrowave.proxy.servlet.front.cdi.event.BeforeRequest; |
| import org.apache.meecrowave.proxy.servlet.front.cdi.event.OnRequest; |
| import org.apache.meecrowave.proxy.servlet.front.cdi.event.OnResponse; |
| import org.apache.meecrowave.proxy.servlet.front.cdi.extension.SpyExtension; |
| |
| // IMPORTANT: don't make this class depending on meecrowave, cxf or our internals, use setup class |
| public class CDIProxyServlet extends ProxyServlet { |
| @Inject |
| private Event<BeforeRequest> beforeRequestEvent; |
| |
| @Inject |
| private Event<AfterResponse> afterResponseEvent; |
| |
| @Inject |
| private Event<OnRequest> onRequestEvent; |
| |
| @Inject |
| private Event<OnResponse> onResponseEvent; |
| |
| @Inject |
| private SpyExtension spy; |
| |
| @Override |
| protected CompletionStage<HttpServletResponse> doExecute(final Routes.Route route, |
| final HttpServletRequest req, final HttpServletResponse resp, |
| final String prefix) throws IOException { |
| final CompletionStage<HttpServletResponse> stage; |
| if (spy.isHasBeforeEvent()) { |
| final BeforeRequest event = new BeforeRequest(req, resp); |
| event.setRoute(route); |
| event.setPrefix(prefix); |
| beforeRequestEvent.fire(event); |
| stage = super.doExecute(event.getRoute(), req, resp, event.getPrefix()); |
| } else { |
| stage = super.doExecute(route, req, resp, prefix); |
| } |
| if (!spy.isHasAfterEvent()) { |
| return stage; |
| } |
| return stage.handle((r, t) -> { |
| afterResponseEvent.fire(new AfterResponse(req, resp)); |
| return r; |
| }); |
| } |
| |
| @Override |
| protected CompletionStage<Response> doRequest(final Routes.Route route, |
| final HttpServletRequest req, |
| final HttpServletResponse response, |
| final String prefix) throws IOException { |
| if (spy.isHasOnRequestEvent()) { |
| final OnRequest onRequest = new OnRequest(req, response, route, r -> super.doRequest(r, req, response, prefix)); |
| return onRequestEvent.fireAsync(onRequest, onRequest.getRoute().notificationOptions) |
| .thenCompose(it -> { |
| try { |
| return it.proceed(); |
| } catch (final IOException e) { |
| final CompletableFuture<Response> future = new CompletableFuture<>(); |
| future.completeExceptionally(e); |
| return future; |
| } |
| }); |
| } |
| return super.doRequest(route, req, response, prefix); |
| } |
| |
| @Override |
| protected void forwardResponse(final Routes.Route route, final Response response, |
| final HttpServletRequest request, final HttpServletResponse resp, |
| final Function<InputStream, InputStream> responseRewriter) throws IOException { |
| if (spy.isHasOnResponseEvent()) { |
| final OnResponse onResponse = new OnResponse(request, resp, response, responseRewriter, |
| rewriter -> super.forwardResponse(route, response, request, resp, rewriter)); |
| onResponseEvent.fire(onResponse); |
| if (!onResponse.isProceeded()) { |
| onResponse.proceed(); |
| } |
| } else { |
| super.forwardResponse(route, response, request, resp, identity()); |
| } |
| } |
| } |