Method restart

lib/code-caller.js:167–193

(callback)

     * @param {function} callback - A callback(err, success) function. If 'success' is false then this PythonCaller should be discarded and a new one created by the parent.
     */
    restart(callback) {
        debug(`enter restart(), state: ${String(this.state)}, uuid: ${this.uuid}`);
        this._checkState([CREATED, WAITING, EXITING, EXITED]);

        if (!config.useWorkers) {
            debug(`exit restart(), state: ${String(this.state)}, uuid: ${this.uuid}`);
            return callback(new Error('cannot restart when useWorkers=false'));
        }
        if (this.state == CREATED) {
            // no need to restart if we don't have a worker
            debug(`exit restart(), state: ${String(this.state)}, uuid: ${this.uuid}`);
            callback(null, true);
        } else if (this.state == WAITING) {
            this.call(null, 'restart', [], {}, (err, ret_val, _consoleLog) => {
                if (ERR(err, callback)) return;
                if (ret_val != 'success') return callback(new Error(`Error while restarting: ${ret_val}`));
                debug(`exit restart(), state: ${String(this.state)}, uuid: ${this.uuid}`);
                callback(null, true);
            });
        } else if (this.state == EXITING || this.state == EXITED) {
            debug(`exit restart(), state: ${String(this.state)}, uuid: ${this.uuid}`);
            callback(null, false);
        } else {
            debug(`exit restart(), state: ${String(this.state)}, uuid: ${this.uuid}`);
            callback(new Error(`invalid state ${this.state}`));
        }
    }

    done() {
        debug(`enter done(), state: ${String(this.state)}, uuid: ${this.uuid}`);