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BESModuleApp.cc
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BESModuleApp.cc
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// BESModuleApp.C
// This file is part of bes, A C++ back-end server implementation framework
// for the OPeNDAP Data Access Protocol.
// Copyright (c) 2004-2009 University Corporation for Atmospheric Research
// Author: Patrick West <[email protected]> and Jose Garcia <[email protected]>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
// You can contact University Corporation for Atmospheric Research at
// 3080 Center Green Drive, Boulder, CO 80301
// (c) COPYRIGHT University Corporation for Atmospheric Research 2004-2005
// Please read the full copyright statement in the file COPYRIGHT_UCAR.
//
// Authors:
// pwest Patrick West <[email protected]>
// jgarcia Jose Garcia <[email protected]>
#include <iostream>
#include "BESModuleApp.h"
#include "BESError.h"
#include "BESPluginFactory.h"
#include "BESAbstractModule.h"
#include "TheBESKeys.h"
#include "BESUtil.h"
using namespace std;
/** @brief Default constructor
*
* Initialized the static _the Applicatioon to point to this application
* object
*/
BESModuleApp::BESModuleApp() :
BESApp()
{
}
#if 0
/** @brief Default destructor
*
* sets the static _theApplication to null. Does not call terminate. It is up
* to the main method to call the terminate method.
*/
BESModuleApp::~BESModuleApp()
{
}
#endif
/** @brief Load and initialize any BES modules
*
* @return 0 if successful and not 0 otherwise
* @param argC argc value passed to the main function
* @param argV argv value passed to the main function
*/
int BESModuleApp::initialize(int argC, char **argV)
{
int retVal = BESApp::initialize(argC, argV);
if (!retVal) {
try {
retVal = loadModules();
}
catch( BESError &e ) {
cerr << "Error during module initialization: " << e.get_message() << endl;
retVal = 1;
}
catch( ... ) {
cerr << "Error during module initialization: Unknown exception" << endl;
retVal = 1;
}
}
return retVal;
}
/** @brief load data handler modules using the initialization file
*/
int BESModuleApp::loadModules()
{
int retVal = 0;
bool found = false;
vector<string> vals;
TheBESKeys::TheKeys()->get_values("BES.modules", vals, found);
vector<string>::iterator l = vals.begin();
vector<string>::iterator le = vals.end();
// The following code was likely added before we had the 'Include'
// directive. Now all modules have a line in their .conf file to
// Include dap.conf and that makes this redundant. However, what
// was happening was a module named XdapX would match the find()
// call below and would wind up being loaded _before_ the dap module.
// That led to all sorts of runtime problems. See ticket 2258. Since
// we don't need this and it can cause problems, I'm removing it.
// jhrg 10/13/14
#if 0
// This is a kludge. But we want to be sure that the dap
// modules get loaded first.
vector<string> ordered_list;
for (; l != le; l++) {
string mods = (*l);
if (mods != "") {
if (mods.find("dap", 0) != string::npos) {
ordered_list.insert(ordered_list.begin(), mods);
}
else {
ordered_list.push_back(mods);
}
}
}
l = ordered_list.begin();
le = ordered_list.end();
#endif
for (; l != le; l++) {
string mods = (*l);
list<string> mod_list;
BESUtil::explode(',', mods, mod_list);
list<string>::iterator i = mod_list.begin();
list<string>::iterator e = mod_list.end();
for (; i != e; i++) {
if (!(*i).empty()) {
string key = "BES.module." + (*i);
string so;
try {
TheBESKeys::TheKeys()->get_value(key, so, found);
}
catch( BESError &e ) {
cerr << e.get_message() << endl;
return 1;
}
if (so == "") {
cerr << "Couldn't find the module for " << (*i) << endl;
return 1;
}
bes_module new_mod;
new_mod._module_name = (*i);
new_mod._module_library = so;
_module_list.push_back(new_mod);
}
}
}
list<bes_module>::iterator mi = _module_list.begin();
list<bes_module>::iterator me = _module_list.end();
for (; mi != me; mi++) {
bes_module curr_mod = *mi;
_moduleFactory.add_mapping(curr_mod._module_name, curr_mod._module_library);
}
for (mi = _module_list.begin(); mi != me; mi++) {
bes_module curr_mod = *mi;
try {
string modname = curr_mod._module_name;
BESAbstractModule *o = _moduleFactory.get(modname);
o->initialize(modname);
delete o;
}
catch( BESError &e ) {
cerr << "Caught plugin exception during initialization of " << curr_mod._module_name << " module:" << endl
<< " " << e.get_message() << endl;
retVal = 1;
break;
}
catch( ... ) {
cerr << "Caught unknown exception during initialization of " << curr_mod._module_name << " module" << endl;
retVal = 1;
break;
}
}
return retVal;
}
/** @brief clean up after the application
*
* Calls terminate on each of the loaded modules
*
* @return 0 if successful and not 0 otherwise
* @param sig if the application is terminating due to a signal, otherwise 0
* is passed.
*/
int BESModuleApp::terminate(int sig)
{
list<bes_module>::iterator i = _module_list.begin();
list<bes_module>::iterator e = _module_list.end();
bool done = false;
try {
// go in the reverse order that the modules were loaded
// TODO replace this with a reverse iterator. jhrg 12/21/12
while (!done) {
if (e == i)
done = true;
else {
e--;
bes_module curr_mod = *e;
string modname = curr_mod._module_name;
BESAbstractModule *o = _moduleFactory.get(modname);
if (o) {
o->terminate(modname);
delete o;
}
}
}
}
catch( BESError &e ) {
cerr << "Caught exception during module termination: " << e.get_message() << endl;
}
catch( ... ) {
cerr << "Caught unknown exception during terminate" << endl;
}
return BESApp::terminate(sig);
}
/** @brief dumps information about this object
*
* Displays the pointer value of this instance along with the name of the
* application, whether the application is initialized or not and whether the
* application debugging is turned on.
*
* @param strm C++ i/o stream to dump the information to
*/
void BESModuleApp::dump(ostream &strm) const
{
strm << BESIndent::LMarg << "BESModuleApp::dump - (" << (void *) this << ")" << endl;
BESIndent::Indent();
if (_module_list.size()) {
strm << BESIndent::LMarg << "loaded modules:" << endl;
BESIndent::Indent();
list<bes_module>::const_iterator i = _module_list.begin();
list<bes_module>::const_iterator e = _module_list.end();
for (; i != e; i++) {
bes_module curr_mod = *i;
strm << BESIndent::LMarg << curr_mod._module_name << ": " << curr_mod._module_library << endl;
}
BESIndent::UnIndent();
}
else {
strm << BESIndent::LMarg << "loaded modules: none" << endl;
}
BESIndent::UnIndent();
}