public class My_2nd_Api {
    
    Public static void Insert_Records(){
   
        
List<Opportunity> oppbatch=[select id,name,stageName, Edition__r.name,                          
                            (select id, name from OpportunityLineItems  ), 
                            (Select contact.firstname,contact.lastname,contact.Email,contact.Phone,contact.Salutation,contact.title  from OpportunityContactRoles) 
                           from Opportunity where Edition__r.name ='FM EXPO 2017' AND  HasOpportunityLineItem = true ];
                            
        system.debug('oppbatch List query.. '+oppbatch);
        
List<OppWrapper> oppWrapperVarList = new List<OppWrapper>();
for(Opportunity opp : oppbatch) 
{
 system.debug('Chehking'+opp.OpportunityLineItems);
 OppWrapper oppwrappervar = new OppWrapper(opp.id,opp.name,opp.StageName,opp.Edition__r.name,                                        
                                                                                  
                                           null, null, null, null, null); 

    
    for(OpportunityLineItem li : opp.OpportunityLineItems)
    {    
        oppwrappervar.SFDC_Record_Unique_ID=li.id;
        oppwrappervar.Product_Name=li.name;
              
    }
   for(OpportunityContactRole ocr : opp.OpportunityContactRoles)
    {
        oppwrappervar.First_Name = ocr.contact.firstname;
        oppwrappervar.Last_Name =ocr.contact.lastname ;
        oppwrappervar.Email=ocr.contact.Email;
        oppwrappervar.Mobile=ocr.contact.Phone;
        oppwrappervar.Salutation=ocr.contact.Salutation;
        oppwrappervar.Job_Title=ocr.contact.title;        
    }
    
oppWrapperVarList.add(oppwrappervar);
}
 string jsonbody=Json.serialize(oppWrapperVarList);
        system.debug('Json body---->'+jsonbody);
        
        Http http = new Http();
        HttpRequest request = new HttpRequest();
        //request.setEndpoint('http://fpdatamap.salesforceoutsourcing.in/api/FPDatas');
        request.setEndpoint('http://sfdata.iqratechnology.com/api/fs_metadata');

        request.setMethod('POST');
        request.setHeader('Content-Type','application/json');
        //request.setHeader('Content-Type','multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW');
        //request.setHeader('Authorization','Bearer '+ AuthorizationToken);
//request.setBody('[{ "RecordId": "456","RecordName": "moosa traders pvt ltd / The Big 5 Construct Egypt 2018 /  / 093061123", "EventName": "a2JD0000001ns6uMAA U", "RecordStage": "Test Stage Amjad","BannerName": "Test Banner Amjad","StandNo": "Test Stand Amjad"}]');
        request.setBody(jsonbody);
        
       HttpResponse response = http.send(request);
        system.debug('Response body '+ response.getBody());
if (response.getStatusCode() != 201) {
    System.debug('The status code returned was not expected: ' +
        response.getStatusCode() + ' ' + response.getStatus());
} else {
    System.debug(response.getBody());
}
        
        
    }
    
    Public class OppWrapper
    {
        public String SFDC_RecordID {get;set;}
        public String SFDC_RecordName {get;set;}
        public String SFDC_RecordStage {get;set;}
        public String SFDC_EventName {get;set;}       
        public String SFDC_Record_Unique_ID {get;set;}
        public String Product_Name {get;set;}       
        public String First_Name {get;set;}
        public String Last_Name {get;set;}
        public String Email {get;set;}
        public String Mobile {get;set;}
        public String Salutation {get;set;}
        public String Job_Title {get;set;}     
        
       
        
        public OppWrapper(String SFDC_RecordID,String SFDC_RecordName,String SFDC_RecordStage,String SFDC_EventName,
                          String SFDC_Record_Unique_ID,String Product_Name,String First_Name,String Last_Name,String Email,String Mobile,String Salutation,
                          String Job_Title)
        {
            this.SFDC_RecordID =SFDC_RecordID;
            this.SFDC_RecordName =SFDC_RecordName;
            this.SFDC_RecordStage =SFDC_RecordStage;
            this.SFDC_EventName=SFDC_EventName;           
            this.SFDC_Record_Unique_ID=SFDC_Record_Unique_ID;
            this.Product_Name=Product_Name;          
            this.First_Name=First_Name;
            this.Last_Name=Last_Name;
            this.Email=Email;
            this.Mobile=Mobile;
            this.Salutation=Salutation;
            this.Job_Title=Job_Title;
            
            
        }
    }
    
}

i have created this class for posting the data in third party API but facing governer limits now i need to convert this class into the batch class can any one please help me to achive this requiremnt need urgent please help...........