| /* |
| * ==================================================================== |
| * 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| |
| package org.apache.hc.client5.http.impl.classic; |
| |
| import java.io.IOException; |
| import java.io.InterruptedIOException; |
| |
| import org.apache.hc.client5.http.ConnectionKeepAliveStrategy; |
| import org.apache.hc.client5.http.HttpRoute; |
| import org.apache.hc.client5.http.UserTokenHandler; |
| import org.apache.hc.client5.http.classic.ExecChain; |
| import org.apache.hc.client5.http.classic.ExecChainHandler; |
| import org.apache.hc.client5.http.classic.ExecRuntime; |
| import org.apache.hc.client5.http.impl.ConnectionShutdownException; |
| import org.apache.hc.client5.http.io.HttpClientConnectionManager; |
| import org.apache.hc.client5.http.protocol.HttpClientContext; |
| import org.apache.hc.core5.annotation.Contract; |
| import org.apache.hc.core5.annotation.Internal; |
| import org.apache.hc.core5.annotation.ThreadingBehavior; |
| import org.apache.hc.core5.http.ClassicHttpRequest; |
| import org.apache.hc.core5.http.ClassicHttpResponse; |
| import org.apache.hc.core5.http.ConnectionReuseStrategy; |
| import org.apache.hc.core5.http.HttpEntity; |
| import org.apache.hc.core5.http.HttpException; |
| import org.apache.hc.core5.http.message.RequestLine; |
| import org.apache.hc.core5.io.CloseMode; |
| import org.apache.hc.core5.util.Args; |
| import org.apache.hc.core5.util.TimeValue; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Usually the last request execution handler in the classic request execution |
| * chain that is responsible for execution of request / response exchanges with |
| * the opposite endpoint. |
| * |
| * @since 4.3 |
| */ |
| @Contract(threading = ThreadingBehavior.STATELESS) |
| @Internal |
| public final class MainClientExec implements ExecChainHandler { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(MainClientExec.class); |
| |
| private final HttpClientConnectionManager connectionManager; |
| private final ConnectionReuseStrategy reuseStrategy; |
| private final ConnectionKeepAliveStrategy keepAliveStrategy; |
| private final UserTokenHandler userTokenHandler; |
| |
| /** |
| * @since 4.4 |
| */ |
| public MainClientExec( |
| final HttpClientConnectionManager connectionManager, |
| final ConnectionReuseStrategy reuseStrategy, |
| final ConnectionKeepAliveStrategy keepAliveStrategy, |
| final UserTokenHandler userTokenHandler) { |
| this.connectionManager = Args.notNull(connectionManager, "Connection manager"); |
| this.reuseStrategy = Args.notNull(reuseStrategy, "Connection reuse strategy"); |
| this.keepAliveStrategy = Args.notNull(keepAliveStrategy, "Connection keep alive strategy"); |
| this.userTokenHandler = Args.notNull(userTokenHandler, "User token handler"); |
| } |
| |
| @Override |
| public ClassicHttpResponse execute( |
| final ClassicHttpRequest request, |
| final ExecChain.Scope scope, |
| final ExecChain chain) throws IOException, HttpException { |
| Args.notNull(request, "HTTP request"); |
| Args.notNull(scope, "Scope"); |
| final String exchangeId = scope.exchangeId; |
| final HttpRoute route = scope.route; |
| final HttpClientContext context = scope.clientContext; |
| final ExecRuntime execRuntime = scope.execRuntime; |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("{}: executing {}", exchangeId, new RequestLine(request)); |
| } |
| try { |
| RequestEntityProxy.enhance(request); |
| |
| final ClassicHttpResponse response = execRuntime.execute(exchangeId, request, context); |
| |
| Object userToken = context.getUserToken(); |
| if (userToken == null) { |
| userToken = userTokenHandler.getUserToken(route, context); |
| context.setAttribute(HttpClientContext.USER_TOKEN, userToken); |
| } |
| |
| // The connection is in or can be brought to a re-usable state. |
| if (reuseStrategy.keepAlive(request, response, context)) { |
| // Set the idle duration of this connection |
| final TimeValue duration = keepAliveStrategy.getKeepAliveDuration(response, context); |
| if (LOG.isDebugEnabled()) { |
| final String s; |
| if (duration != null) { |
| s = "for " + duration; |
| } else { |
| s = "indefinitely"; |
| } |
| LOG.debug("{}: connection can be kept alive {}", exchangeId, s); |
| } |
| execRuntime.markConnectionReusable(userToken, duration); |
| } else { |
| execRuntime.markConnectionNonReusable(); |
| } |
| // check for entity, release connection if possible |
| final HttpEntity entity = response.getEntity(); |
| if (entity == null || !entity.isStreaming()) { |
| // connection not needed and (assumed to be) in re-usable state |
| execRuntime.releaseEndpoint(); |
| return new CloseableHttpResponse(response, null); |
| } |
| ResponseEntityProxy.enhance(response, execRuntime); |
| return new CloseableHttpResponse(response, execRuntime); |
| } catch (final ConnectionShutdownException ex) { |
| final InterruptedIOException ioex = new InterruptedIOException( |
| "Connection has been shut down"); |
| ioex.initCause(ex); |
| execRuntime.discardEndpoint(); |
| throw ioex; |
| } catch (final HttpException | RuntimeException | IOException ex) { |
| execRuntime.discardEndpoint(); |
| throw ex; |
| } catch (final Error error) { |
| connectionManager.close(CloseMode.IMMEDIATE); |
| throw error; |
| } |
| |
| } |
| |
| } |