global static void getIncident(String subject){

    Http http = new Http();
    HttpRequest req =  new HttpRequest();
    HttpResponse res = new HttpResponse();

    string text = subject;

    req.setEndpoint('https://dev24994.service-now.com/api/now/table/incident?sysparm_fields=impact%2Cincident_state%2Csys_updated_onONLast%2520minute%40javascript%3Ags.minutesAgoStart(30)%40javascript%3Ags.minutesAgoEnd(0)%2Cshort_description%2Csys_id%2Ccontact_type&u_sftype=true&sysparm_limit=10');
    req.setMethod('GET');
    req.setHeader('Content-Type', 'application/json');

    String username = 'admin';
    String password = 'xxxxxx';

    Blob headerValue = Blob.valueOf(username + ':' + password);
    String authorizationHeader = 'BASIC ' +
    EncodingUtil.base64Encode(headerValue);
    req.setHeader('Authorization', authorizationHeader);

    res = http.send(req);
    System.debug('jsonrResult :' + res.getBody());

    Deserialization.ResponseResult result = (Deserialization.ResponseResult)JSON.deserialize(res.getBody(),     Deserialization.ResponseResult.class);
    System.debug('Results == :' + result );

    List<Case> casesToUpsert = new List<Case>();
    for(Deserialization d : theresult.result ){

            Case c = new Case();
            c.Priority = d.impact;
            c.Status = d.incident_state;
            c.Subject = d.short_description;
            c.ServiceNowId__c = d.sys_id;
            c.Origin = d.contact_type;

            casesToUpsert.add(c);

    }
    system.debug('Cases to UPsert ::: ' +casesToUpsert);

    if(casesToUpsert.size()>0){
        Database.upsert(casesToUpsert,false) ;
    }

}