Oracle高级队列(Advanced Queue)初体验

最新推荐文章于 2021-04-04 13:41:29 发布

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最新推荐文章于 2021-04-04 13:41:29 发布

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分类专栏： ORACLE 文章标签： oracle properties list table delay object

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本文介绍了Oracle高级队列(Advanced Queue)的基本使用方法，包括创建队列类型、队列表及队列的过程，并演示了消息的发送与接收操作。

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Oracle高级队列(Advanced Queue)初体验

转自:http://54powerman.blog.163.com/blog/static/1424622006811113638111/

-- Create Type
create or replace type note as Object(
subject varchar2(100),
Content varchar2(2000),CreateTime date
);

-- Create queue table
begin
sys.dbms_aqadm.create_queue_table(
queue_table => 'NOTETAB',
queue_payload_type => 'TEST.NOTE'
end;

--create queue
begin
sys.dbms_aqadm.create_queue(
    queue_name => 'NOTEQ',
    queue_table => 'NOTETAB',
    queue_type => sys.dbms_aqadm.normal_queue,
    max_retries => 5,
    retry_delay => 0,
    retention_time => 0);
end;

--enqueue
declare
v_Message note;
v_MsgId RAW(16);
v_options DBMS_AQ.ENQUEUE_OPTIONS_T;
v_properties DBMS_AQ.MESSAGE_PROPERTIES_T;
v_Recipients DBMS_AQ.AQ$_RECIPIENT_LIST_T;
begin
v_Message:=note(subject => 'note3',Content => 'content3',createTime => sysdate);

--     v_Recipients(0) := sys.aq$_agent('NOTE','MTQ',0);
--     v_properties.recipient_list := v_Recipients;
     v_options.visibility :=DBMS_AQ.IMMEDIATE;
     dbms_aq.enqueue(queue_name => 'noteq',enqueue_options => v_options,message_properties => v_properties,payload => v_Message,msgid => v_MsgId);
     dbms_output.put_line('encode success,msgid is '||v_MsgId);

end;

--dequeue
declare
v_Message note;
v_MsgId RAW(16);
v_options DBMS_AQ.DEQUEUE_OPTIONS_T;
v_properties DBMS_AQ.MESSAGE_PROPERTIES_T;
v_Recipients DBMS_AQ.AQ$_RECIPIENT_LIST_T;
begin

--     v_Recipients(0) := sys.aq$_agent('NOTE','MTQ',0);
--     v_properties.recipient_list := v_Recipients;
     v_options.visibility :=DBMS_AQ.IMMEDIATE;
     dbms_aq.dequeue(queue_name => 'noteq',dequeue_options => v_options,message_properties => v_properties,payload => v_Message,msgid => v_MsgId);
     dbms_output.put_line('decode success,msgid is '||v_MsgId);
     dbms_output.put_line('subject is '||v_Message.subject);
     dbms_output.put_line('Content is '||v_Message.Content);
     dbms_output.put_line('createTime is '||to_char(v_Message.createTime,'yyyy-mm-dd hh24:mi:ss'));
end;