ADVANCE_QUEUING: comment envoyer un message à une autre session ?
Bonjour,
Est-ce que quelqu'un pourrait me donner un exemple avec ADVANCE_QUEUING pour qu'une session puisse envoyer un message dans une queue qui serait lu par une autre session.
je me perds dans la doc oracle j'ai du mal à trouver un exemple simple.
Le testcase que je souhaiterais réaliser en fait est le suivant:
Code:
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|
sqlplus scott/tiger@rac1
CREATE OR REPLACE PACKAGE message_api AS
PROCEDURE send (p_number IN NUMBER,
p_text IN VARCHAR2,
p_date IN DATE DEFAULT SYSDATE);
PROCEDURE receive;
END message_api;
/
CREATE OR REPLACE PACKAGE BODY message_api AS
PROCEDURE send (p_number IN NUMBER,
p_text IN VARCHAR2,
p_date IN DATE DEFAULT SYSDATE) AS
l_status NUMBER;
BEGIN
DBMS_PIPE.pack_message(p_number);
DBMS_PIPE.pack_message(p_text);
DBMS_PIPE.pack_message(p_date);
l_status := DBMS_PIPE.send_message('message_pipe');
IF l_status != 0 THEN
RAISE_APPLICATION_ERROR(-20001, 'message_pipe error');
END IF;
END;
PROCEDURE receive AS
l_result INTEGER;
l_number NUMBER;
l_text VARCHAR2(32767);
l_date DATE;
BEGIN
l_result := DBMS_PIPE.receive_message (
pipename => 'message_pipe',
timeout => DBMS_PIPE.maxwait);
IF l_result = 0 THEN
-- Message received successfully.
DBMS_PIPE.unpack_message(l_number);
DBMS_PIPE.unpack_message(l_text);
DBMS_PIPE.unpack_message(l_date);
DBMS_OUTPUT.put_line('l_number: ' || l_number);
DBMS_OUTPUT.put_line('l_text : ' || l_text);
DBMS_OUTPUT.put_line('l_date : ' || l_date);
ELSE
RAISE_APPLICATION_ERROR(-20002, 'message_api.receive was unsuccessful. Return result: ' || l_result);
END IF;
END receive;
END message_api;
/
----------------------------------------------------------------------------------------------------------------------------------------
-- MONO-INSTANCE
----------------------------------------------------------------------------------------------------------------------------------------
-- To test the package, run the following code in one session. The session will appear to hang, waiting for a message to be read off the pipe.
conn scott/tiger@rac1
SET SERVEROUTPUT ON
EXEC message_api.receive;
-- In another session, run the following code to send a message.
CONN scott/tiger@rac1
BEGIN
message_api.send(p_number => 12345,
p_text => 'This is a test.',
p_date => SYSDATE);
END;
/
-- The procedure call in the first session immediately returns, printing out the contents of the message, as seen below.
l_number: 12345
l_text : This is a test.
l_date : 20-NOV-2005 13:35:57
----------------------------------------------------------------------------------------------------------------------------------------
-- RAC
----------------------------------------------------------------------------------------------------------------------------------------
-- To test the package, run the following code in one session. The session will appear to hang, waiting for a message to be read off the pipe.
conn scott/tiger@rac2
SET SERVEROUTPUT ON
EXEC message_api.receive;
-- In another session connected on an other instance, run the following code to send a message.
CONN scott/tiger@rac1
BEGIN
message_api.send(p_number => 12345,
p_text => 'This is a test.',
p_date => SYSDATE);
END;
/
-- => The procedure call in the first session is still wainting for a message |
merci de votre aide
