#!/bin/bash 

wait_for_syncer_alive() {
    i=0
    while [ $i -lt 20 ]
    do 
        check_syncer_alive
        ret=$?
        if [ "$ret" == 1 ]; then 
            echo "syncer is alive"
            break
        fi 
        ((i++))
        sleep 1
    done 
}

check_syncer_alive() {
    pid=$(pgrep syncer)
    if [ -n "$pid" ]; then
        return 1
    else 
        return 0
    fi 
}

check_db_status() {
    while true
    do
        if mysqladmin -h "$1" -P "$2" -u root ping > /dev/null 2>&1
        then
            break
        fi
        sleep 1
    done    
    echo "$3 is alive"
}


stop_syncer() {
    killall -9 syncer || true
} 


start_tidb() {
    cd "${TIDB_DIR}" || exit
    killall -9 tidb-server || true 
    bin/tidb-server > "$1" 2>&1 &
    cd "${OLDPWD}" || exit
}

stop_tidb() {
    killall -9 tidb-server || true
    rm -r /tmp/tidb || true
}

check_previous_command_success_or_exit() {
    if [ "$?" != 0 ];
    then
        exit 1
    fi
}