2014-06-27 Created By BaoXinjian
一、摘要
在之前的博文中介绍了,如何获取从标砖business event抓取消息,如supplier event,
其实质,就是在supplier的任何create, update, delete的处理,都是通过interface和api进行处理的, 而在处理interface和api的package中都会通过wf_event.raise将消息进行传递出来
再通过其他的package对在队列中的消息进行处理,从而实现消息的异步处理,实现interface的处理的主功能和辅助部分进行异步分离
本文介绍了如何运用完全客制化的business event进行客制化消息的传递
在百度文库中,黄建华大神也有非常详细的介绍
二、案例
案例: 建立一个完全客制化的business event,对该event消息触发和传递进行控制
Step1. 建立客制化表,存放从wf_event.raise传递出来的消息
1 --Create table
2 create table BXJ_BES_EVENT_DEMO 3 ( 4 DEMO_ID NUMBER, 5 MESSAGE_NAME VARCHAR2(100), 6 MESSAGE_KEY VARCHAR2(100), 7 MESSAGE_CONTENTS CLOB, 8 PARAMETER_VALUE1 VARCHAR2(4000), 9 PARAMETER_VALUE2 VARCHAR2(4000), 10 EVENT_DATE DATE 11 ); 12
13 --Create Sequence
14 CREATE SEQUENCE BXJ_BES_DEMO_S;
Step2. 建立package用以抓取event
1 --Create Package Header
2 CREATE OR REPLACE PACKAGE apps.bxj_bes_event_demo_pkg AUTHID CURRENT_USER AS
3 FUNCTION process_an_event(p_sub_guid IN RAW, 4 p_event IN OUT NOCOPY wf_event_t) 5 RETURN VARCHAR2; 6 END; 7
8 --Create Package Body
9 CREATE OR REPLACE PACKAGE BODY apps.bxj_bes_event_demo_pkg AS
10 FUNCTION process_an_event(p_sub_guid IN RAW, 11 p_event IN OUT NOCOPY wf_event_t) 12 RETURN VARCHAR2 IS
13 l_demo_rec bxj_bes_event_demo%ROWTYPE; 14 BEGIN
15 SELECT bxj_bes_demo_s.NEXTVAL INTO l_demo_rec.demo_id FROM dual; 16 --get evevent itself
17 l_demo_rec.message_name := p_event.geteventname; 18 l_demo_rec.event_date := p_event.getsenddate; 19 --we can use this key to transfer message only
20 l_demo_rec.message_key := p_event.geteventkey; 21 --optional, get xml data
22 l_demo_rec.message_contents := p_event.geteventdata; 23 --optional, get parameter
24 l_demo_rec.parameter_value1 := p_event.getvalueforparameter('Parameter1'); 25 l_demo_rec.parameter_value2 := p_event.getvalueforparameter('Parameter2'); 26 --do anything here
27 INSERT INTO bxj_bes_event_demo VALUES l_demo_rec; 28 RETURN 'SUCCESS'; 29 EXCEPTION 30 WHEN OTHERS THEN
31 RETURN 'ERROR'; 32 END; 33 END;
Step3. 建立Event
Step4.1 建立Subscription
Step4.2 建立subscription中的header信息
Step4.3 建立subscription中的detail信息