jilo/jvb/jitsi-stats

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#!/usr/bin/env bash
#grep -e 'Videobridge.createConference\|Conference.expire' jvb.log > 11
### Variables
# log files
LOGFILE="../../jvb.log"
ROTATED_LOGFILE="../../jvb.log.1"
# SQLite database file
DB="../../jitsi-stats.db"
###
# SQLite queries
db_get_state='SELECT filename, filetime, position, inode FROM state WHERE id = 1;'
db_set_state_template="UPDATE state SET time=datetime('now'), filename='%s', filetime='%s', position='%s', inode='%s' WHERE id = 1;"
db_insert_template="INSERT INTO conferences (conference_name, conference_id, start, end) VALUES ('%s', '%s', '%s', '%s');"
# Get the last processed state from the database
get_state() {
sqlite3 "$DB" "$db_get_state"
}
# Update the state database
set_state() {
local filename=$1
local filetime=$2
local position=${3:-0}
local inode=$4
db_set_state=$(printf "$db_set_state_template" "$filename" "$filetime" "$position" "$inode")
sqlite3 "$DB" "$db_set_state"
}
# Retrieve last log file and position inside it
IFS='|' read -r last_file last_filetime last_pos last_inode <<< $(get_state)
# Initialize logfile vars
last_pos=${last_pos:-0}
current_inode=$(stat -c '%i' "$LOGFILE")
current_filetime=$(stat -c '%Y' "$LOGFILE")
# Local assoc array for conference events tracking
declare -A start_times
jvb_log_parse() {
local file=$1
local start_pos=$2
local new_last_pos="$start_pos"
# We open the file and start reading from $start_pos bytes
exec 3<"$file"
while IFS= read -r line; do
# save new position (previous plus bytes in current line plus 1 for the new line)
new_last_pos=$((new_last_pos + ${#line} + 1))
# locate conference starting event
if [[ "$line" =~ ([0-9-]+\ [0-9:.]+)\ [A-Z]+:.*\ Videobridge\.createConference#[0-9]+:\ create_conf,\ id=([a-zA-Z0-9]+) ]]; then
timestamp="${BASH_REMATCH[1]}"
conferenceId="${BASH_REMATCH[2]}"
start_times["$conferenceId"]="$timestamp"
# locate the corresponding conference ending event
elif [[ "$line" =~ ([0-9-]+\ [0-9:.]+)\ [A-Z]+:.*\[confId=([a-zA-Z0-9]+)\ .*conf_name=([^ ]+)@.*\]\ Conference\.expire ]]; then
end_time="${BASH_REMATCH[1]}"
conferenceId="${BASH_REMATCH[2]}"
conferenceName="${BASH_REMATCH[3]}"
start_time="${start_times["$conferenceId"]}"
if [[ -n "$start_time" ]]; then
db_insert=$(printf "$db_insert_template" "$conferenceName" "$conferenceId" "$start_time" "$end_time")
sqlite3 "$DB" "$db_insert"
unset start_times["$conferenceId"]
fi
fi
# We don't use pipe, but process substitution '<(dd...)' to avoid running while loop in subshell and lose the 'new_last_pos' value
done < <(dd bs=1 skip="$start_pos" <&3 2>/dev/null)
# Close the file descriptor and return the new position value
exec 3<&-
echo "$new_last_pos"
}
# parse the rotated log file
if [[ "$last_file" == "$LOGFILE" && -f "$ROTATED_LOGFILE" ]]; then
echo "Processing the rotated log file: $ROTATED_LOGFILE"
last_pos=$(jvb_log_parse "$ROTATED_LOGFILE" 0)
last_file="$ROTATED_LOGFILE"
last_inode=$(stat -c '%i' "$ROTATED_LOGFILE")
last_filetime=$(stat -c '%Y' "$ROTATED_LOGFILE")
set_state "$last_file" "$last_filetime" "$last_pos" "$last_inode"
fi
# parse the current log file
echo "Processing the current log file: $LOGFILE"
new_last_pos=$(jvb_log_parse "$LOGFILE" "$last_pos")
# DEBUG
echo "New last position after parsing: $new_last_pos"
# update the state in db
set_state "$LOGFILE" "$current_filetime" "$new_last_pos" "$current_inode"
echo "Data import finished."