webserver.h
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- /*
- * webserver.h
- * Copyright (C) 1999 by the University of Southern California
- * $Id: webserver.h,v 1.5 2005/08/25 18:58:13 johnh Exp $
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program 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.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
- *
- *
- * The copyright of this module includes the following
- * linking-with-specific-other-licenses addition:
- *
- * In addition, as a special exception, the copyright holders of
- * this module give you permission to combine (via static or
- * dynamic linking) this module with free software programs or
- * libraries that are released under the GNU LGPL and with code
- * included in the standard release of ns-2 under the Apache 2.0
- * license or under otherwise-compatible licenses with advertising
- * requirements (or modified versions of such code, with unchanged
- * license). You may copy and distribute such a system following the
- * terms of the GNU GPL for this module and the licenses of the
- * other code concerned, provided that you include the source code of
- * that other code when and as the GNU GPL requires distribution of
- * source code.
- *
- * Note that people who make modified versions of this module
- * are not obligated to grant this special exception for their
- * modified versions; it is their choice whether to do so. The GNU
- * General Public License gives permission to release a modified
- * version without this exception; this exception also makes it
- * possible to release a modified version which carries forward this
- * exception.
- *
- */
- //
- // Incorporation Polly's web traffic module into the PagePool framework
- //
- // Simple web server implementation
- // Two server scheduling policies supported: fcfs and stf
- // Xuan Chen (xuanc@isi.edu)
- //
- #ifndef ns_webserver_h
- #define ns_webserver_h
- #include "webtraf.h"
- #define NO_DELAY 0
- #define FCFS_DELAY 1
- #define STF_DELAY 2
- // Data structure for incoming jobs (requests)
- struct job_s {
- int obj_id;
- Node *clnt;
- Agent *tcp;
- Agent *snk;
- int size;
- void *data;
- job_s *next;
- };
- class WebTrafPool;
- // Data structure for web server
- class WebServer : public TimerHandler{
- private:
- void WebServer_init(WebTrafPool *);
- public:
- WebServer(WebTrafPool*pool_) { WebServer_init(pool_); };
- WebServer() { WebServer_init(NULL); };
-
- // Assign node to server
- void set_node(Node *);
- // Return server's node
- Node* get_node();
- // Return server's node id
- int get_nid();
- // Set server processing rate
- void set_rate(double);
- // Set server function mode
- void set_mode(int);
- // Set the limit for job queue
- void set_queue_limit(int);
- // Handling incoming job
- double job_arrival(int, Node *, Agent *, Agent *, int, void *);
- private:
- // The web page pool associated with this server
- WebTrafPool *web_pool_;
- // The node associated with this server
- Node *node;
- // Server processing rate KB/s
- double rate_;
-
- // Flag for web server:
- // 0: there's no server processing delay
- // 1: server processing delay from FCFS scheduling policy
- // 2: server processing delay from STF scheduling policy
- int mode_;
- // Job queue
- job_s *head, *tail;
- int queue_size_;
- int queue_limit_;
- virtual void expire(Event *e);
- double job_departure();
-
- // Flag for server status
- int busy_;
- void schedule_next_job();
- };
- #endif //ns_webserver_h