function validateJobTarget(job, callback) {
            // If no target is given, we don't care:
            if (!job.target) {
                return callback(null);
            }

            var locked = _lockedTargets().some(function (r) {
                var re = new RegExp(r);
                return (re.test(job.target));
            });

            if (locked) {
                return callback(new e.BackendInvalidArgumentError(
                    'Job target is currently locked by another job'));
            }

            if (_jobTargets().indexOf(job.target) === -1) {
                return callback(null);
            }

            var filtered = Object.keys(jobs).filter(function (uuid) {
                return (
                  uuid !== job.uuid &&
                  jobs[uuid].target === job.target &&
                  Object.keys(job.params).every(function (p) {
                    return (jobs[uuid].params[p] &&
                      jobs[uuid].params[p] === job.params[p]);
                }) &&
                  (jobs[uuid].execution === 'queued' ||
                   jobs[uuid].execution === 'running'));
            });

            if (filtered.length !== 0) {
                return callback(new e.BackendInvalidArgumentError(
                  'Another job with the same target' +
                  ' and params is already queued'));
            } else {
                return callback(null);
            }
        }
function validateJobTarget(job, callback) {
            
            if (!job.target) {
                return callback(null);
            }

            var locked = _lockedTargets().some(function (r) {
                var re = new RegExp(r);
                return (re.test(job.target));
            });

            if (locked) {
                return callback(new e.BackendInvalidArgumentError(
                    'Job target is currently locked by another job'));
            }

            if (_jobTargets().indexOf(job.target) === -1) {
                return callback(null);
            }

            var filtered = Object.keys(jobs).filter(function (uuid) {
                return (
                  uuid !== job.uuid &&
                  jobs[uuid].target === job.target &&
                  Object.keys(job.params).every(function (p) {
                    return (jobs[uuid].params[p] &&
                      jobs[uuid].params[p] === job.params[p]);
                }) &&
                  (jobs[uuid].execution === 'queued' ||
                   jobs[uuid].execution === 'running'));
            });

            if (filtered.length !== 0) {
                return callback(new e.BackendInvalidArgumentError(
                  'Another job with the same target' +
                  ' and params is already queued'));
            } else {
                return callback(null);
            }
        }
function validateJobTarget ( job , callback ) { // If no target is given, we don't care: if ( ! job . target ) { return callback ( null ) ; } var locked = _lockedTargets ( ) . some ( function ( r ) { var re = new RegExp ( r ) ; return ( re . test ( job . target ) ) ; } ) ; if ( locked ) { return callback ( new e . BackendInvalidArgumentError ( 'Job target is currently locked by another job' ) ) ; } if ( _jobTargets ( ) . indexOf ( job . target ) === - 1 ) { return callback ( null ) ; } var filtered = Object . keys ( jobs ) . filter ( function ( uuid ) { return ( uuid !== job . uuid && jobs [ uuid ] . target === job . target && Object . keys ( job . params ) . every ( function ( p ) { return ( jobs [ uuid ] . params [ p ] && jobs [ uuid ] . params [ p ] === job . params [ p ] ) ; } ) && ( jobs [ uuid ] . execution === 'queued' || jobs [ uuid ] . execution === 'running' ) ) ; } ) ; if ( filtered . length !== 0 ) { return callback ( new e . BackendInvalidArgumentError ( 'Another job with the same target' + ' and params is already queued' ) ) ; } else { return callback ( null ) ; } }
job - the job object callback - f(err) called with error in case there is a duplicated job with the same target and same params
job - the job object callback - f ( err ) called with error in case there is a duplicated job with the same target and same params