/*
* ====================================================================
* 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.http.impl.conn;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.routing.HttpRoute;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HttpContext;
import org.apache.http.protocol.ExecutionContext;
import org.apache.http.protocol.HttpProcessor;
import org.apache.http.protocol.HttpRequestExecutor;
import org.apache.http.util.EntityUtils;
/**
* Executes a request from a new thread.
*
*/
public class ExecReqThread extends GetConnThread {
protected final ClientConnectionManager conn_manager;
protected final RequestSpec request_spec;
protected volatile HttpResponse response;
protected volatile byte[] response_data;
/**
* Executes a request.
* This involves the following steps:
* <ol>
* <li>obtain a connection (see base class)</li>
* <li>open the connection</li>
* <li>prepare context and request</li>
* <li>execute request to obtain the response</li>
* <li>consume the response entity (if there is one)</li>
* <li>release the connection</li>
* </ol>
*/
public ExecReqThread(ClientConnectionManager mgr,
HttpRoute route, long timeout,
RequestSpec reqspec) {
super(mgr, route, timeout);
this.conn_manager = mgr;
request_spec = reqspec;
}
public HttpResponse getResponse() {
return response;
}
public byte[] getResponseData() {
return response_data;
}
/**
* This method is invoked when the thread is started.
* It invokes the base class implementation.
*/
@Override
public void run() {
super.run(); // obtain connection
if (connection == null)
return; // problem obtaining connection
try {
request_spec.context.setAttribute
(ExecutionContext.HTTP_CONNECTION, connection);
doOpenConnection();
HttpRequest request = (HttpRequest) request_spec.context.
getAttribute(ExecutionContext.HTTP_REQUEST);
request_spec.executor.preProcess
(request, request_spec.processor, request_spec.context);
response = request_spec.executor.execute
(request, connection, request_spec.context);
request_spec.executor.postProcess
(response, request_spec.processor, request_spec.context);
doConsumeResponse();
} catch (Throwable dart) {
dart.printStackTrace(System.out);
if (exception != null)
exception = dart;
} finally {
conn_manager.releaseConnection(connection, -1, null);
}
}
/**
* Opens the connection after it has been obtained.
*/
protected void doOpenConnection() throws Exception {
connection.open
(conn_route, request_spec.context, request_spec.params);
}
/**
* Reads the response entity, if there is one.
*/
protected void doConsumeResponse() throws Exception {
if (response.getEntity() != null)
response_data = EntityUtils.toByteArray(response.getEntity());
}
/**
* Helper class collecting request data.
* The request and target are expected in the context.
*/
public static class RequestSpec {
public HttpRequestExecutor executor;
public HttpProcessor processor;
public HttpContext context;
public HttpParams params;
}
}
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