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arangodb/lib/HttpServer/HttpHandler.cpp

146 lines
4.1 KiB
C++

////////////////////////////////////////////////////////////////////////////////
/// @brief abstract class for handlers
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2010-2011 triagens GmbH, Cologne, Germany
///
/// Licensed 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.
///
/// Copyright holder is triAGENS GmbH, Cologne, Germany
///
/// @author Dr. Frank Celler
/// @author Copyright 2009-2011, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////
#include "HttpHandler.h"
#include "Logger/Logger.h"
#include "HttpServer/HttpServer.h"
#include "Rest/HttpRequest.h"
#include "Rest/HttpResponse.h"
#include "GeneralServer/GeneralServerJob.h"
namespace triagens {
namespace rest {
// -----------------------------------------------------------------------------
// constructs and destructors
// -----------------------------------------------------------------------------
HttpHandler::HttpHandler (HttpRequest* request)
: _handlerFactory(0),
request(request),
response(0),
_task(0),
_job(0) {
}
HttpHandler::~HttpHandler () {
if (request != 0) {
delete request;
}
if (response != 0) {
delete response;
}
if (_task != 0) {
_task->setHandler(0);
}
if (_handlerFactory != 0) {
_handlerFactory->unregisterHandler(this);
}
}
// -----------------------------------------------------------------------------
// public methods
// -----------------------------------------------------------------------------
HttpResponse* HttpHandler::getResponse () {
return response;
}
void HttpHandler::setHandlerFactory (HttpHandlerFactory* handlerFactory) {
_handlerFactory = handlerFactory;
}
bool HttpHandler::handleAsync () {
if (_job == 0) {
LOGGER_WARNING << "no job is known";
}
else {
HttpResponse* response = getResponse();
try {
if (response == 0) {
basics::InternalError err("no response received from handler");
handleError(err);
response = getResponse();
}
if (response != 0) {
_task->handleResponse(response);
}
}
catch (...) {
LOGGER_ERROR << "caught exception in " << __FILE__ << "@" << __LINE__;
}
// this might delete the handler (i.e. ourselves!)
return _job->beginShutdown();
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief create a job
////////////////////////////////////////////////////////////////////////////////
Job* HttpHandler::createJob () {
LOGGER_WARNING << "job creation requested for handler that is not intended to produce jobs";
return 0;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief create a job
////////////////////////////////////////////////////////////////////////////////
Job* HttpHandler::createJob (Scheduler* scheduler, Dispatcher* dispatcher, HttpCommTask* task) {
HttpServer* server = dynamic_cast<HttpServer*>(task->getServer());
GeneralAsyncCommTask<HttpServer, HttpHandlerFactory, HttpCommTask>* atask =
dynamic_cast<GeneralAsyncCommTask<HttpServer, HttpHandlerFactory, HttpCommTask>*>(task);
GeneralServerJob<HttpServer, HttpHandlerFactory::GeneralHandler>* job =
new GeneralServerJob<HttpServer, HttpHandlerFactory::GeneralHandler>(server, scheduler, dispatcher, atask, this);
setJob(job);
return job;
}
}
}