从 Oracle 触发器调用 Web 服务

Question

我正在尝试从数据插入的触发器中调用 Web 服务。

下面是编写服务调用的触发器。

create or replace trigger TRG_EDI_TRANSACTIONS
  before insert on edi_transactions
  for each row
declare
  --SOAP REQUESTS/RESPONSE
  soap_req_msg VARCHAR2(2000);

  -- HTTP REQUEST/RESPONSE
  http_req  UTL_HTTP.req;
  http_resp UTL_HTTP.resp;
  buffer    varchar2(4000);
  PRAGMA AUTONOMOUS_TRANSACTION;
begin

  soap_req_msg := '
               <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:edi="http://edi.hnb.com" xmlns:xsd="http://edi.hnb.com/xsd">
   <soapenv:Header/>
   <soapenv:Body>
      <edi:processEDIData>
         <edi:request>
     <xsd:bankCode>' || :NEW.Bank_Code ||
                  '</xsd:bankCode>
            <xsd:brCode>' || :NEW.Br_Code ||
                  '</xsd:brCode>
            <xsd:cardParticular>' || :NEW.Tran_Particular ||
                  '</xsd:cardParticular>
            <xsd:crncyCode>' || :NEW.Crncy_Code ||
                  '</xsd:crncyCode>
            <xsd:dateStatus>' || :NEW.Date_Status ||
                  '</xsd:dateStatus>
            <xsd:dthInitSolId>' || :NEW.Dth_Init_Sol_Id ||
                  '</xsd:dthInitSolId>
            <xsd:foracid>' || :NEW.Foracid ||
                  '</xsd:foracid>
            <xsd:partTranSrlNum>' ||
                  :NEW.Part_Tran_Srl_Num || '</xsd:partTranSrlNum>
            <xsd:partTranType>' || :NEW.Part_Tran_Type ||
                  '</xsd:partTranType>
            <xsd:pstdDate>' || :NEW.Pstd_Date ||
                  '</xsd:pstdDate>
            <xsd:retry>' || :NEW.Retry ||
                  '</xsd:retry>
            <xsd:solId>' || :NEW.Sol_Id ||
                  '</xsd:solId>
            <xsd:tranAmt>' || :NEW.Tran_Amt ||
                  '</xsd:tranAmt>
            <xsd:tranCrncyCode>' || :NEW.Tran_Crncy_Code ||
                  '</xsd:tranCrncyCode>
            <xsd:tranDate>' || :NEW.Tran_Date ||
                  '</xsd:tranDate>
            <xsd:tranId>' || :NEW.Tran_Id ||
                  '</xsd:tranId>
            <xsd:tranParticular>' || :NEW.Tran_Particular ||
                  '</xsd:tranParticular>
            <xsd:tranRmks>' || :NEW.Tran_Rmks ||
                  '</xsd:tranRmks>
            <xsd:tranSubType>' || :NEW.Tran_Sub_Type ||
                  '</xsd:tranSubType>
            <xsd:tranType>' || :NEW.Tran_Type ||
                  '</xsd:tranType>
            <xsd:trfStatus>' || :NEW.Trf_Status || '</xsd:trfStatus>
         </edi:request>
      </edi:processEDIData>
   </soapenv:Body>
</soapenv:Envelope>
  ';

  http_req := UTL_HTTP.begin_request('http://10.110.6.49:8305/services/prxy_edi_router_svc ',
                                     'POST',
                                     'HTTP/1.1');
  UTL_HTTP.set_header(http_req, 'Accept-Encoding', 'gzip,deflate');
  UTL_HTTP.set_header(http_req, 'Content-Type', 'text/xml');
  utl_http.set_header(http_req, 'SOAPAction', 'processEDIData');
  UTL_HTTP.set_header(http_req, 'Content-Length', length(soap_req_msg));
  UTL_HTTP.set_header(http_req, 'Host', '10.110.6.49:8305');
  UTL_HTTP.set_header(http_req, 'Connection', 'Keep-Alive');
  UTL_HTTP.write_text(http_req, soap_req_msg);

  http_resp := UTL_HTTP.get_response(http_req);

  begin
    loop
      utl_http.read_line(http_resp, buffer);
      dbms_output.put_line(buffer);
    end loop;
    utl_http.end_response(http_resp);
  exception
    when utl_http.end_of_body then
      utl_http.end_response(http_resp);
  end;

end TRG_EDI_TRANSACTIONS;

有没有办法不等待响应。

（类似于 WSO2 ESB 中的“OUT_ONLY”属性，将请求发送出去 并且不期待回复）

问题是当我通过触发器调用 Web 服务时，如果 Web 服务关闭，则发生连接超时，触发器正在等待响应并且错误正在抛出错误。

如果有人可以指导这一点，请。

Oracle 版本 11.2.0.3.0。

Answer 1

您可以使用dbms_job.submit。这个包调度和管理作业队列中的作业。

  dbms_job.submit(job => my_job, 
    what => 'my_procedure(foo);'
    next_date => sysdate+1,
    interval => 'sysdate+1');

您可以阅读更多关于它的信息here。