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Copyright 2009 Nathan Phillip Brink, Ethan Zonca, Matthew Orlando
This file is a part of DistRen.
DistRen is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
DistRen 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with DistRen. If not, see <http://www.gnu.org/licenses/>.
*/
/* This file contains the code which both processes (renders) jobs as a slave, and the code which distributes frames to slaves after receiving them from the client portion of the codebase. */
#include "distrenjob.h"
#include "listen.h"
#include "slavefuncs.h"
#include "mysql.h"
#include "common/asprintf.h"
#include "common/execio.h"
#include "common/options.h"
#include "common/protocol.h"
#include <confuse.h>
#include <malloc.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include <libxml/encoding.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/xmlmemory.h>
#include <libxml/xmlreader.h>
#include <libxml/xmlwriter.h>
/* ******************* Structs ************************ */
struct general_info
{
struct distrenjob head;
distrend_mysql_conn_t conn;
struct distrend_config *config;
struct
{
/** general_info.xml */
char *geninfo;
} files;
int jobs_in_queue;
unsigned int free_clients;
unsigned int rendering_clients;
unsigned int total_finished_jobs;
unsigned int total_frames_rendered;
unsigned int highest_jobnum;
int hibernate;
time_t timestamp;
unsigned long total_render_power;
unsigned long total_priority_pieces;
};
/* *********************************************
Function Prototypes
********************************************* */
/* ************General Functions************* */
int distrend_do();
void frame_watchdog(struct distrenjob *distrenjob_head);
int distrend_do_config(int argc, char *argv[], struct distrend_config **config);
int distrend_config_free(struct distrend_config *config);
/* **************XML Functions**************** */
void update_general_info(struct general_info *geninfo);
int import_general_info(struct general_info *general_info);
int update_xml_joblist(struct general_info *geninfo);
/* **************Test Functions**************** */
int interactiveTest(int test, struct general_info general_info, distrend_mysql_conn_t conn);
/* **************** Main ********************* */
int main(int argc, char *argv[])
{
/* Parse arguments */
int counter;
int test = 0; /*< Interactive mode if 1 */
struct general_info general_info;
struct distrend_clientset *clients;
enum clientstatus
{
CLIENTSTATUS_UNINITIALIZED = 0,
CLIENTSTATUS_BUSY = 1,
CLIENTSTATUS_IDLE = 2
} clientstatus;
// xmlinit();
for(counter = 0; counter < argc; counter ++)
{
if(strcmp(argv[counter], "-h") == 0)
{
fprintf(stderr, "Usage: distrend [option] \nStarts the distrend server\n\t-h\tshow this help\n\t-t\tlaunches queue testing interface \n");
return 2;
}
else if(strcmp(argv[counter], "-t") == 0)
{
fprintf(stderr, "Entering into test mode...\n\n");
test = 1;
}
}
if(distrend_do_config(argc, argv, &general_info.config))
return 1;
/** preset paths */
_distren_asprintf(&general_info.files.geninfo, "%s/general_info.xml",
general_info.config->datadir);
/** MySQL Connection */
fprintf(stderr,"Connecting to mysql...\n");
if(mysqlConnect(&general_info.conn))
{
fprintf(stderr, "%s:%d: mysqlConnect() failed\n", __FILE__, __LINE__);
return 1;
}
fprintf(stderr,"Finished connecting!\n");
/** Execute test function */
interactiveTest(test, general_info, general_info.conn);
distrend_listen(general_info.config, &clients);
int slaveKey = 0; // Remotio should set me on a per-slave basis
/* Main Loop */
while(!general_info.config->die)
{
int clientsays = 0; /*< temporary example variable, will be replaced when we can handle messages */
distrend_accept(general_info.config, clients);
/* Make the following code more event-driven */
frame_watchdog(&general_info.head);
struct frameset *frame;
struct distrenjob *job;
/* If the client is idle, must be modified for climbing through linked list of clients (client->clientnum) */
if(clientstatus == CLIENTSTATUS_IDLE)
{
int returnnum = find_jobframe(general_info.conn, slaveKey, job->jobnum, frame->num); // Finds a frame to render @FIXME: Slavenum :D
if(returnnum)
{
fprintf(stderr,"No frames are available to render at this time. Idling...\n");
sleep(10);
}
else
remotio_send_to_client(frame->num, job->jobnum); // Pseudo-sends data to client
}
/* If the client states that they finished the frame */
if(clientsays == DISTREN_REQUEST_DONEFRAME){
clientstatus = CLIENTSTATUS_IDLE; // Sets the client back to idle
finish_frame(general_info.conn, 0, job->jobnum, frame->num); // @TODO: Make sure this actually works.
}
}
distrend_unlisten(general_info.config->listens, clients);
distrend_config_free(general_info.config);
xmlcleanup();
/** free() paths */
free(general_info.files.geninfo);
mysqlDisconnect(general_info.conn);
return 0;
}
/* ********************** Functions ************************* */
/**
Performs command stored in a client's request. @TODO: Fill stub
*/
int distrend_do()
{
return 0;
}
/** Checks for dead, latent, or stale slaves */
void frame_watchdog(struct distrenjob *distrenjob_head)
{
// Replace with mysqlness, maybe
// iterate through jobs
// if the job has been started, checks by seeing if either to first or second frame has been started
// FRAMESETSTATUS_UNASSIGNED
// iterate through all frames for this job:
//watchdog_forgiveness = seconds of forgiveness before frame is re-assigned:
// If frame is not completed within the number of seconds specified by watchdog_forgiveness
// Then change the frame status to unassigned
}
/* Grabs config info from confs */
int distrend_do_config(int argc, char *argv[], struct distrend_config **config)
{
unsigned int counter;
cfg_opt_t myopts_listen[] =
{
CFG_SIMPLE_STR("type", NULL),
CFG_SIMPLE_STR("path", NULL),
CFG_SIMPLE_INT("port", NULL),
CFG_END()
};
cfg_opt_t myopts[] =
{
CFG_SEC("listen", /* this must be imported into struct listens (which must still be declared) */
myopts_listen,
CFGF_MULTI),
CFG_SIMPLE_STR("datadir", NULL),
CFG_STR_LIST("render_types", NULL, CFGF_NONE),
CFG_END()
};
cfg_t *cfg_listen;
fprintf(stderr, "%s:%d: running config\n", __FILE__, __LINE__);
*config = malloc(sizeof(struct distrend_config));
myopts[1].simple_value = &(*config)->datadir;
if(options_init(argc, argv, &(*config)->mycfg, myopts, "daemon", &(*config)->options))
return 1;
/**
grab listen blocks:
*/
(*config)->listens = malloc(sizeof(struct distrend_listen) * (cfg_size((*config)->mycfg, "listen") + 1));
for(counter = 0; counter < cfg_size((*config)->mycfg, "listen"); counter ++)
{
cfg_listen = cfg_getnsec((*config)->mycfg, "listen", counter);
(*config)->listens[counter].port = cfg_getint(cfg_listen, "port");
(*config)->listens[counter].sock = -1;
}
memset(&(*config)->listens[counter], '\0', sizeof(struct distrend_listen));
fprintf(stderr, "using %s as datadir\n", (*config)->datadir);
return 0;
}
int distrend_config_free(struct distrend_config *config)
{
options_free(config->options);
free(config);
return 0;
}
/* ************************** XML Functions ************************* */
// writes the general_info.xml file which is a copy of the general_info structure
// except that it doesn't hold free_clients and rendering_clients
void update_general_info(struct general_info *geninfo)
{
xmlTextWriterPtr writer;
char *tmp;
writer = xmlNewTextWriterFilename(geninfo->files.geninfo, 0);
xmlTextWriterStartDocument(writer, NULL, "utf-8", NULL);
xmlTextWriterStartElement(writer, (xmlChar*)"general_info");
_distren_asprintf(&tmp, "%d", geninfo->jobs_in_queue);
xmlTextWriterWriteElement(writer, (xmlChar*)"jobs_in_queue", (xmlChar*)tmp);
free(tmp);
_distren_asprintf(&tmp, "%d", geninfo->total_finished_jobs);
xmlTextWriterWriteElement(writer, (xmlChar*)"total_finished_jobs", (xmlChar*)tmp);
free(tmp);
_distren_asprintf(&tmp, "%d", geninfo->total_frames_rendered);
xmlTextWriterWriteElement(writer, (xmlChar*)"total_frames_rendered", (xmlChar*)tmp);
free(tmp);
_distren_asprintf(&tmp, "%d", geninfo->highest_jobnum);
xmlTextWriterWriteElement(writer, (xmlChar*)"highest_jobnum", (xmlChar*)tmp);
free(tmp);
xmlTextWriterEndDocument(writer);
xmlFreeTextWriter(writer);
}
/**
Reads general state information from general_info.xml
into the general_info structure.
*/
int import_general_info(struct general_info *general_info)
{
xmlDocPtr doc;
xmlNodePtr cur;
doc = xmlParseFile(general_info->files.geninfo);
cur = xmlDocGetRootElement(doc);
if (xmlStrcmp(cur->name, (xmlChar*)"general_info"))
{
fprintf(stderr, "xml document is wrong type");
xmlFreeDoc(doc);
return 1;
}
cur = cur->xmlChildrenNode;
general_info->jobs_in_queue = atoi((char*)xmlNodeListGetString(doc, cur->xmlChildrenNode, 1));
cur = cur->next;
general_info->total_finished_jobs = atoi((char*)xmlNodeListGetString(doc, cur->xmlChildrenNode, 1));
cur = cur->next;
general_info->total_frames_rendered = atoi((char*)xmlNodeListGetString(doc, cur->xmlChildrenNode, 1));
cur = cur->next;
general_info->highest_jobnum = atoi((char*)xmlNodeListGetString(doc, cur->xmlChildrenNode, 1));
general_info->hibernate = 0;
general_info->free_clients = 0;
general_info->rendering_clients = 0;
general_info->timestamp = 0;
general_info->total_render_power = 0;
general_info->total_priority_pieces = 0;
xmlFreeDoc(doc);
return 0;
}
/**
updates job_list.xml which lists all the jobs in the queue
@return 0 means success
*/
// @QUERY: Likely obselete (don't remove at request of ohnobinki)
int update_xml_joblist(struct general_info *geninfo)
{
struct distrenjob *job;
xmlTextWriterPtr writer;
char *tmp;
int counter;
/**
update timestamp
*/
geninfo->timestamp ++;
if(geninfo->timestamp > 65530)
geninfo->timestamp = 0;
_distren_asprintf(&tmp, "%s/job_list.xml",
geninfo->config->datadir);
writer = xmlNewTextWriterFilename(tmp, 0);
free(tmp);
xmlTextWriterStartDocument(writer, NULL, "utf-8", NULL);
/**
create root element job_list
*/
xmlTextWriterStartElement(writer, (xmlChar*)"job_list");
_distren_asprintf(&tmp, "%d", geninfo->timestamp);
xmlTextWriterWriteAttribute(writer, (xmlChar*)"timestamp", (xmlChar*)tmp);
free(tmp);
geninfo->total_priority_pieces = 0;
counter = 0;
for(job = geninfo->head.next; job; job = job->next)
{
_distren_asprintf(&tmp, "%d", job->jobnum);
xmlTextWriterWriteElement(writer, (xmlChar*)"jobnum", (xmlChar*)tmp);
free(tmp);
/**
this is needed for the new frame finder to work
Why the random constant numeral 11? --ohnobinki
*/
geninfo->total_priority_pieces = geninfo->total_priority_pieces + job->priority;
counter++;
}
xmlTextWriterEndElement(writer);
/**
close elements and end document
*/
xmlTextWriterEndDocument(writer);
/**
free writer and save xml file to disk
*/
xmlFreeTextWriter(writer);
return 0;
}
/* ************************** Test Functions ************************* */
/** Interactive test for the queuing system */
/* @QUEUE: Test uses methods not present in C code using mysql web-based system */
int interactiveTest(int test, struct general_info general_info, distrend_mysql_conn_t conn){
int command;
fprintf(stderr,"Hello!\n");
int32_t slaveKey = 0;
int32_t jobKey = 0;
int32_t frameNum = 0;
int32_t newPriority = 0;
int tmp = 0;
while(test == 1)
{
fprintf(stderr, "Welcome to DistRen Alpha Interactive Test Mode\n\n");
fprintf(stderr, "\t1 \tGet a frame to render\n");
fprintf(stderr, "\t2 \tChange job priority\n");
fprintf(stderr, "\t3 \tSet frame finished\n");
fprintf(stderr, "\t4 \tQuit\n");
scanf("%d", &command);
switch(command)
{
case 1:
fprintf(stderr, "Got frame: ");
find_jobframe(conn, slaveKey, jobKey, frameNum);
fprintf(stderr, "jobKey: %d, frameNum: %d\n",jobKey,frameNum);
break;
case 2:
fprintf(stderr,"Job key: ");
scanf("%d", &tmp);
jobKey = tmp;
fprintf(stderr,"New priority: ");
scanf("%d", &tmp);
newPriority = tmp;
change_job_priority(conn, jobKey, newPriority);
fprintf(stderr,"Changed!");
break;
case 3:
fprintf(stderr,"Slave Key: ");
scanf("%d", &tmp);
slaveKey = tmp;
fprintf(stderr,"Job Key: ");
scanf("%d", &tmp);
jobKey = tmp;
fprintf(stderr,"Frame Number: ");
scanf("%d", &tmp);
frameNum = tmp;
finish_frame(conn, slaveKey, jobKey, frameNum);
fprintf(stderr,"Finished Frame!\n");
break;
case 4:
return 0;
break;
}
return 0;
}
return 0;
}
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