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Apache HttpComponents Client
/*
* ====================================================================
* 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
*
* Concurrent message exchanges executed by this client will get assigned to
* separate connections leased from the connection pool.
*
*
* @since 4.3
*/
@Contract(threading = ThreadingBehavior.SAFE_CONDITIONAL)
@Internal
class InternalHttpClient extends CloseableHttpClient implements Configurable {
private static final Logger LOG = LoggerFactory.getLogger(InternalHttpClient.class);
private final HttpClientConnectionManager connManager;
private final HttpRequestExecutor requestExecutor;
private final ExecChainElement execChain;
private final HttpRoutePlanner routePlanner;
private final Lookup cookieSpecRegistry;
private final Lookup authSchemeRegistry;
private final CookieStore cookieStore;
private final CredentialsProvider credentialsProvider;
private final RequestConfig defaultConfig;
private final ConcurrentLinkedQueue closeables;
public InternalHttpClient(
final HttpClientConnectionManager connManager,
final HttpRequestExecutor requestExecutor,
final ExecChainElement execChain,
final HttpRoutePlanner routePlanner,
final Lookup cookieSpecRegistry,
final Lookup authSchemeRegistry,
final CookieStore cookieStore,
final CredentialsProvider credentialsProvider,
final RequestConfig defaultConfig,
final List closeables) {
super();
this.connManager = Args.notNull(connManager, "Connection manager");
this.requestExecutor = Args.notNull(requestExecutor, "Request executor");
this.execChain = Args.notNull(execChain, "Execution chain");
this.routePlanner = Args.notNull(routePlanner, "Route planner");
this.cookieSpecRegistry = cookieSpecRegistry;
this.authSchemeRegistry = authSchemeRegistry;
this.cookieStore = cookieStore;
this.credentialsProvider = credentialsProvider;
this.defaultConfig = defaultConfig;
this.closeables = closeables != null ? new ConcurrentLinkedQueue<>(closeables) : null;
}
private HttpRoute determineRoute(final HttpHost target, final HttpContext context) throws HttpException {
return this.routePlanner.determineRoute(target, context);
}
private void setupContext(final HttpClientContext context) {
if (context.getAttribute(HttpClientContext.AUTHSCHEME_REGISTRY) == null) {
context.setAttribute(HttpClientContext.AUTHSCHEME_REGISTRY, this.authSchemeRegistry);
}
if (context.getAttribute(HttpClientContext.COOKIESPEC_REGISTRY) == null) {
context.setAttribute(HttpClientContext.COOKIESPEC_REGISTRY, this.cookieSpecRegistry);
}
if (context.getAttribute(HttpClientContext.COOKIE_STORE) == null) {
context.setAttribute(HttpClientContext.COOKIE_STORE, this.cookieStore);
}
if (context.getAttribute(HttpClientContext.CREDS_PROVIDER) == null) {
context.setAttribute(HttpClientContext.CREDS_PROVIDER, this.credentialsProvider);
}
if (context.getAttribute(HttpClientContext.REQUEST_CONFIG) == null) {
context.setAttribute(HttpClientContext.REQUEST_CONFIG, this.defaultConfig);
}
}
@Override
protected CloseableHttpResponse doExecute(
final HttpHost target,
final ClassicHttpRequest request,
final HttpContext context) throws IOException {
Args.notNull(request, "HTTP request");
try {
final HttpClientContext localcontext = HttpClientContext.adapt(
context != null ? context : new BasicHttpContext());
RequestConfig config = null;
if (request instanceof Configurable) {
config = ((Configurable) request).getConfig();
}
if (config != null) {
localcontext.setRequestConfig(config);
}
setupContext(localcontext);
final HttpRoute route = determineRoute(
target != null ? target : RoutingSupport.determineHost(request),
localcontext);
final String exchangeId = ExecSupport.getNextExchangeId();
localcontext.setExchangeId(exchangeId);
if (LOG.isDebugEnabled()) {
LOG.debug("{} preparing request execution", exchangeId);
}
final ExecRuntime execRuntime = new InternalExecRuntime(LOG, connManager, requestExecutor,
request instanceof CancellableDependency ? (CancellableDependency) request : null);
final ExecChain.Scope scope = new ExecChain.Scope(exchangeId, route, request, execRuntime, localcontext);
final ClassicHttpResponse response = this.execChain.execute(ClassicRequestBuilder.copy(request).build(), scope);
return CloseableHttpResponse.adapt(response);
} catch (final HttpException httpException) {
throw new ClientProtocolException(httpException.getMessage(), httpException);
}
}
@Override
public RequestConfig getConfig() {
return this.defaultConfig;
}
@Override
public void close() {
close(CloseMode.GRACEFUL);
}
@Override
public void close(final CloseMode closeMode) {
if (this.closeables != null) {
Closeable closeable;
while ((closeable = this.closeables.poll()) != null) {
try {
if (closeable instanceof ModalCloseable) {
((ModalCloseable) closeable).close(closeMode);
} else {
closeable.close();
}
} catch (final IOException ex) {
LOG.error(ex.getMessage(), ex);
}
}
}
}
}