-/* $Id: router_flexml.cpp,v 1.1 2005-10-26 14:12:00 marc Exp $
- Copyright (c) 2005, Index Data.
+/* This file is part of Metaproxy.
+ Copyright (C) Index Data
-%LICENSE%
- */
+Metaproxy is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+Metaproxy 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 General Public License
+for more details.
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+#include "config.hpp"
+#include <metaproxy/xmlutil.hpp>
+#include <string.h>
#include "router_flexml.hpp"
+#include "factory_filter.hpp"
+#include "factory_static.hpp"
+
+#include <iostream>
+#include <map>
+#include <list>
+#include <yaz/log.h>
+#include <yaz/xml_include.h>
+
+#include <boost/shared_ptr.hpp>
+
+#include <libxml/xmlversion.h>
+#include <libxml/parser.h>
+#include <libxml/tree.h>
+
+namespace mp = metaproxy_1;
+
+namespace metaproxy_1 {
+ class RouterFleXML::Route {
+ friend class RouterFleXML::Rep;
+ friend class RouterFleXML::Pos;
+ friend class RouterFleXML;
+ std::list<boost::shared_ptr<const mp::filter::Base> > m_list;
+ };
+ class RouterFleXML::Rep {
+ friend class RouterFleXML;
+ friend class RouterFleXML::Pos;
+ Rep();
+
+ void base(xmlDocPtr doc, mp::FactoryFilter &factory, bool test_only,
+ const char *file_include_path);
+
+ typedef std::map<std::string,
+ boost::shared_ptr<const mp::filter::Base > >
+ IdFilterMap ;
+
+ IdFilterMap m_id_filter_map;
+
+ std::map<std::string,RouterFleXML::Route> m_routes;
+
+ std::string m_start_route;
+
+ std::string m_dl_path;
+
+ void parse_xml_config_dom(xmlDocPtr doc, bool test_only,
+ const char *file_include_path);
+
+ void parse_xml_filters(xmlDocPtr doc, const xmlNode *node,
+ bool test_only, const char *file_include_path);
+ void parse_xml_filters1(xmlDocPtr doc, const xmlNode *node,
+ bool test_only, const char *file_include_path,
+ Route &route);
+ void parse_xml_routes(xmlDocPtr doc, const xmlNode *node,
+ bool test_only, const char *file_include_path);
+ void check_routes_in_filters(const xmlNode *n);
+
+ bool m_xinclude;
+ private:
+ FactoryFilter *m_factory; // TODO shared_ptr
+ };
+
+ class RouterFleXML::Pos : public RoutePos {
+ public:
+ virtual const filter::Base *move(const char *route);
+ virtual RoutePos *clone();
+ virtual ~Pos();
+ mp::RouterFleXML::Rep *m_p;
+
+ std::map<std::string,
+ RouterFleXML::Route>::iterator m_route_it;
+ std::list<boost::shared_ptr <const mp::filter::Base> >::iterator m_filter_it;
+ };
+}
+
+void mp::RouterFleXML::Rep::parse_xml_filters(xmlDocPtr doc,
+ const xmlNode *node,
+ bool test_only,
+ const char *file_include_path)
+{
+ unsigned int filter_nr = 0;
+ while (node && mp::xml::check_element_mp(node, "filter"))
+ {
+ filter_nr++;
+
+ const struct _xmlAttr *attr;
+ std::string id_value;
+ std::string type_value;
+ for (attr = node->properties; attr; attr = attr->next)
+ {
+ std::string name = std::string((const char *) attr->name);
+ std::string value;
+
+ if (attr->children && attr->children->type == XML_TEXT_NODE)
+ value = std::string((const char *)attr->children->content);
+
+ if (name == "id")
+ id_value = value;
+ else if (name == "type")
+ type_value = value;
+ else if (name == "base")
+ ;// Ignore XInclude base attribute.
+ else
+ throw mp::XMLError("Only attribute id or type allowed"
+ " in filter element. Got " + name);
+ }
+
+ if (!m_factory->exist(type_value))
+ {
+ yaz_log(YLOG_LOG, "Loading %s (dlpath %s)",
+ type_value.c_str(), m_dl_path.c_str());
+ m_factory->add_creator_dl(type_value, m_dl_path);
+ }
+ boost::shared_ptr<mp::filter::Base> fb(m_factory->create(type_value));
+
+ fb->configure(node, test_only, file_include_path);
+
+ if (m_id_filter_map.find(id_value) != m_id_filter_map.end())
+ throw mp::XMLError("Filter " + id_value + " already defined");
+
+ m_id_filter_map[id_value] = fb;
+
+ node = mp::xml::jump_to_next(node, XML_ELEMENT_NODE);
+ }
+}
+
+void mp::RouterFleXML::Rep::parse_xml_filters1(xmlDocPtr doc,
+ const xmlNode *node,
+ bool test_only,
+ const char *file_include_path,
+ Route &route)
+{
+ while (node)
+ {
+ if (mp::xml::is_element_mp(node, "filters"))
+ {
+ const xmlNode* node1 =
+ mp::xml::jump_to_children(node, XML_ELEMENT_NODE);
+
+ parse_xml_filters1(doc, node1, test_only, file_include_path, route);
+ }
+ else if (mp::xml::check_element_mp(node, "filter"))
+ {
+ const struct _xmlAttr *attr;
+ std::string refid_value;
+ std::string type_value;
+ for (attr = node->properties; attr; attr = attr->next)
+ {
+ std::string name = std::string((const char *) attr->name);
+ std::string value;
+
+ if (attr->children && attr->children->type == XML_TEXT_NODE)
+ value = std::string((const char *)attr->children->content);
+
+ if (name == "refid")
+ refid_value = value;
+ else if (name == "type")
+ type_value = value;
+ else if (name == "base")
+ ;// Ignore XInclude base attribute.
+ else
+ throw mp::XMLError("Only attribute 'refid' or 'type'"
+ " allowed for element 'filter'."
+ " Got " + name);
+ }
+ if (refid_value.length())
+ {
+ std::map<std::string,
+ boost::shared_ptr<const mp::filter::Base > >::iterator it;
+ it = m_id_filter_map.find(refid_value);
+ if (it == m_id_filter_map.end())
+ throw mp::XMLError("Unknown filter refid "
+ + refid_value);
+ else
+ route.m_list.push_back(it->second);
+ }
+ else if (type_value.length())
+ {
+ if (!m_factory->exist(type_value))
+ {
+ yaz_log(YLOG_LOG, "Loading %s (dlpath %s)",
+ type_value.c_str(), m_dl_path.c_str());
+ m_factory->add_creator_dl(type_value, m_dl_path);
+ }
+ mp::filter::Base* filter_base = m_factory->create(type_value);
+
+ filter_base->configure(node, test_only, file_include_path);
+
+ route.m_list.push_back(
+ boost::shared_ptr<mp::filter::Base>(filter_base));
+ }
+
+ }
+ node = mp::xml::jump_to_next(node, XML_ELEMENT_NODE);
+ }
+}
+
+
+void mp::RouterFleXML::Rep::parse_xml_routes(xmlDocPtr doc,
+ const xmlNode *node,
+ bool test_only,
+ const char *file_include_path)
+{
+ mp::xml::check_element_mp(node, "route");
+
+ unsigned int route_nr = 0;
+ while (mp::xml::is_element_mp(node, "route"))
+ {
+ route_nr++;
+
+ const struct _xmlAttr *attr;
+ std::string id_value;
+ for (attr = node->properties; attr; attr = attr->next)
+ {
+ std::string name = std::string((const char *) attr->name);
+ std::string value;
+
+ if (attr->children && attr->children->type == XML_TEXT_NODE)
+ value = std::string((const char *)attr->children->content);
+
+ if (name == "id")
+ id_value = value;
+ else if (name == "base")
+ ;// Ignore XInclude base attribute.
+ else
+ throw mp::XMLError("Only attribute 'id' allowed for"
+ " element 'route'."
+ " Got " + name);
+ }
+
+ Route route;
+ // process <filter> / <filters> nodes in third level
+ const xmlNode* node3 = mp::xml::jump_to_children(node, XML_ELEMENT_NODE);
+
+
+
+ parse_xml_filters1(doc, node3, test_only, file_include_path, route);
+
+ std::map<std::string,RouterFleXML::Route>::iterator it;
+ it = m_routes.find(id_value);
+ if (it != m_routes.end())
+ throw mp::XMLError("Route id='" + id_value
+ + "' already exist");
+ else
+ m_routes[id_value] = route;
+ node = mp::xml::jump_to_next(node, XML_ELEMENT_NODE);
+ }
+}
+
+void mp::RouterFleXML::Rep::check_routes_in_filters(const xmlNode *node)
+{
+ while (node)
+ {
+ if (mp::xml::is_element_mp(node, "filters"))
+ {
+ const xmlNode *n =
+ mp::xml::jump_to_children(node, XML_ELEMENT_NODE);
+ check_routes_in_filters(n);
+ }
+ else if (mp::xml::is_element_mp(node, "filter"))
+ {
+ const xmlNode *n =
+ mp::xml::jump_to_children(node, XML_ELEMENT_NODE);
+ while (n)
+ {
+ const struct _xmlAttr *attr;
+ // we assume thar that route attribute is only at one level
+ // below filter.. At least that works for multi and virt_db.
+ for (attr = n->properties; attr; attr = attr->next)
+ {
+ if (!strcmp((const char *) attr->name, "route"))
+ {
+ std::string value;
+
+ if (attr->children && attr->children->type == XML_TEXT_NODE)
+ value = std::string((const char *)attr->children->content);
+
+ std::map<std::string,RouterFleXML::Route>::iterator it;
+ it = m_routes.find(value);
+ if (it == m_routes.end())
+ {
+ throw mp::XMLError("Route '" + value + "' does not exist");
+ }
+ }
+ }
+ n = mp::xml::jump_to_next(n, XML_ELEMENT_NODE);
+ }
+ }
+ node = mp::xml::jump_to_next(node, XML_ELEMENT_NODE);
+ }
+}
+
+void mp::RouterFleXML::Rep::parse_xml_config_dom(xmlDocPtr doc,
+ bool test_only,
+ const char *file_include_path)
+{
+ if (!doc)
+ throw mp::XMLError("Empty XML Document");
+
+ const xmlNode* root = xmlDocGetRootElement(doc);
+
+ if (file_include_path)
+ {
+ int r = yaz_xml_include_glob((xmlNode *) root, file_include_path,
+ YAZ_FILE_GLOB_FAIL_NOTEXIST);
+ if (r)
+ throw mp::XMLError("YAZ XML Include failed");
+ }
+
+ mp::xml::check_element_mp(root, "metaproxy");
+
+ const xmlNode* node = mp::xml::jump_to_children(root, XML_ELEMENT_NODE);
+
+ if (mp::xml::is_element_mp(node, "dlpath"))
+ {
+ m_dl_path = mp::xml::get_text(node);
+ node = mp::xml::jump_to_next(node, XML_ELEMENT_NODE);
+ }
+ // process <start> node which is expected first element node
+ if (mp::xml::check_element_mp(node, "start"))
+ {
+ const struct _xmlAttr *attr;
+ for (attr = node->properties; attr; attr = attr->next)
+ {
+ std::string name = std::string((const char *) attr->name);
+ std::string value;
+
+ if (attr->children && attr->children->type == XML_TEXT_NODE)
+ value = std::string((const char *)attr->children->content);
+
+ if (name == "route")
+ m_start_route = value;
+ else if (name == "base")
+ ;// Ignore XInclude base attribute.
+ else
+ throw mp::XMLError("Only attribute route allowed"
+ " in element 'start'. Got " + name);
+ }
+ node = mp::xml::jump_to_next(node, XML_ELEMENT_NODE);
+ }
+ // process <filters> node if given
+ if (mp::xml::is_element_mp(node, "filters"))
+ {
+ parse_xml_filters(doc, mp::xml::jump_to_children(node,
+ XML_ELEMENT_NODE),
+ test_only, file_include_path);
+
+ node = mp::xml::jump_to_next(node, XML_ELEMENT_NODE);
+ }
+ // process <routes> node which is expected third element node
+ mp::xml::check_element_mp(node, "routes");
+
+ parse_xml_routes(doc, mp::xml::jump_to_children(node, XML_ELEMENT_NODE),
+ test_only, file_include_path);
+
+ node = mp::xml::jump_to_next(node, XML_ELEMENT_NODE);
+ if (node)
+ {
+ throw mp::XMLError("Unexpected element "
+ + std::string((const char *)node->name));
+ }
+
+ node = mp::xml::jump_to_children(root, XML_ELEMENT_NODE);
+ while (node)
+ {
+ if (mp::xml::is_element_mp(node, "filters"))
+ check_routes_in_filters(
+ mp::xml::jump_to_children(node,
+ XML_ELEMENT_NODE));
+ else if (mp::xml::is_element_mp(node, "routes"))
+ {
+ const xmlNode* n = mp::xml::jump_to_children(node,
+ XML_ELEMENT_NODE);
+ while (n)
+ {
+ if (mp::xml::is_element_mp(n, "route"))
+ {
+ check_routes_in_filters(
+ mp::xml::jump_to_children(n, XML_ELEMENT_NODE));
+
+ }
+ n = mp::xml::jump_to_next(n, XML_ELEMENT_NODE);
+ }
+ }
+ node = mp::xml::jump_to_next(node, XML_ELEMENT_NODE);
+ }
+}
+
+mp::RouterFleXML::Rep::Rep() : m_xinclude(false)
+{
+}
+
+void mp::RouterFleXML::Rep::base(xmlDocPtr doc, mp::FactoryFilter &factory,
+ bool test_only, const char *file_include_path)
+{
+ m_factory = &factory;
+ parse_xml_config_dom(doc, test_only, file_include_path);
+ m_start_route = "start";
+}
+
+mp::RouterFleXML::RouterFleXML(xmlDocPtr doc, mp::FactoryFilter &factory,
+ bool test_only, const char *file_include_path)
+ : m_p(new Rep)
+{
+ m_p->base(doc, factory, test_only, file_include_path);
+}
+
+mp::RouterFleXML::RouterFleXML(std::string xmlconf, mp::FactoryFilter &factory,
+ bool test_only)
+ : m_p(new Rep)
+{
+ xmlDocPtr doc = xmlParseMemory(xmlconf.c_str(),
+ xmlconf.size());
+ if (!doc)
+ throw mp::XMLError("xmlParseMemory failed");
+ else
+ {
+ m_p->base(doc, factory, test_only, 0);
+ xmlFreeDoc(doc);
+ }
+}
+
+mp::RouterFleXML::~RouterFleXML()
+{
+}
+
+const mp::filter::Base *mp::RouterFleXML::Pos::move(const char *route)
+{
+ if (route && *route)
+ {
+ //std::cout << "move to " << route << "\n";
+ m_route_it = m_p->m_routes.find(route);
+ if (m_route_it == m_p->m_routes.end())
+ {
+ std::cout << "no such route " << route << "\n";
+ throw mp::XMLError("bad route " + std::string(route));
+ }
+ m_filter_it = m_route_it->second.m_list.begin();
+ }
+ if (m_filter_it == m_route_it->second.m_list.end())
+ return 0;
+ const mp::filter::Base *f = (*m_filter_it).get();
+ m_filter_it++;
+ return f;
+}
+
+mp::RoutePos *mp::RouterFleXML::createpos() const
+{
+ mp::RouterFleXML::Pos *p = new mp::RouterFleXML::Pos;
+
+ p->m_route_it = m_p->m_routes.find(m_p->m_start_route);
+ if (p->m_route_it == m_p->m_routes.end())
+ {
+ delete p;
+ return 0;
+ }
+ p->m_filter_it = p->m_route_it->second.m_list.begin();
+ p->m_p = m_p.get();
+ return p;
+}
+
+mp::RoutePos *mp::RouterFleXML::Pos::clone()
+{
+ mp::RouterFleXML::Pos *p = new mp::RouterFleXML::Pos;
+ p->m_filter_it = m_filter_it;
+ p->m_route_it = m_route_it;
+ p->m_p = m_p;
+ return p;
+}
+
+mp::RouterFleXML::Pos::~Pos()
+{
+}
+
+
+void mp::RouterFleXML::start()
+{
+ std::map<std::string,RouterFleXML::Route>::iterator route_it;
+
+ route_it = m_p->m_routes.begin();
+ while (route_it != m_p->m_routes.end())
+ {
+ RouterFleXML::Route route = route_it->second;
+
+ std::list<boost::shared_ptr<const mp::filter::Base> >::iterator it;
+
+ for (it = route.m_list.begin(); it != route.m_list.end(); it++)
+ (*it)->start();
+ route_it++;
+ }
+}
+
+void mp::RouterFleXML::stop(int signo)
+{
+ std::map<std::string,RouterFleXML::Route>::iterator route_it;
+
+ route_it = m_p->m_routes.begin();
+ while (route_it != m_p->m_routes.end())
+ {
+ RouterFleXML::Route route = route_it->second;
+
+ std::list<boost::shared_ptr<const mp::filter::Base> >::iterator it;
+
+ for (it = route.m_list.begin(); it != route.m_list.end(); it++)
+ (*it)->stop(signo);
+ route_it++;
+ }
+}
/*
* Local variables:
* c-basic-offset: 4
+ * c-file-style: "Stroustrup"
* indent-tabs-mode: nil
- * c-file-style: "stroustrup"
* End:
* vim: shiftwidth=4 tabstop=8 expandtab
*/
+
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