Advanced Queuing - Oracle

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Messaging Gateway Functionality Messaging Gateway Functionality Messaging Gateway provides the following functionality: Extends AQ message propagation Messaging Gateway propagates messages between Advanced Queuing and non-Oracle messaging systems. Messages sent by Advanced Queuing applications can be received by non-Oracle message system applications. Conversely, messages published by non-Oracle message system applications can be consumed by Advanced Queuing applications. Native message format support Messaging Gateway supports the native message formats of messaging systems. AQ messages can have RAW or any ADT payload. MQSeries messages can be TEXT or byte messages of any type. This enables integration of existing applications of messaging systems. Message conversion Messaging Gateway facilitates message conversion between AQ messages and non-Oracle message system messages. Messages are converted through either automatic message conversion routines provided by Messaging Gateway or customized message transformation functions that you provide. Integration with the Oracle database Messaging Gateway is managed through an AQ-like PL/SQL interface. Configuration information is stored in Oracle database tables. Message propagation is carried out by an external process of the Oracle database server. Guaranteed message delivery Messaging Gateway guarantees that persistent messages are propagated exactly once if both the message system at the propagation source and the message system at the propagation destination support transactions. If messages are not persistent or the transaction is not supported by the messaging systems at the propagation source and propagation destination, at-most-once propagation is guaranteed. Security support Messaging Gateway supports client authentication of Oracle database and non-Oracle messaging systems. 18-2 Oracle9i Application Developer’s Guide - Advanced Queuing
Messaging Gateway Architecture For Oracle database administrators to control access to the tables, views, and procedures created by the gateway, Messaging Gateway defines two roles, MGW_ ADMINISTRATOR_ROLE and MGW_AGENT_ROLE, for gateway administration and propagation processing. Refer to "Loading Database Objects into the Database" on page 18-7, "Creating a Messaging Gateway Administration User" on page 18-11, and "Creating a Messaging Gateway Agent User" on page 18-11. Messaging Gateway Architecture Messaging Gateway has the following main components: an administration package named DBMS_MGWADM for gateway configuration and management, and a gateway agent that processes propagation, as shown in Figure 18–1. The gateway agent consists of a propagation engine and a set of drivers that communicate with non-Oracle messaging systems. Figure 18–1 Messaging Gateway Architecture Oracle 9i table table Administration Package Messaging Gateway Administration PL/SQL Interface AQ JDBC Messaging Gateway Agent Messaging System Link Propagation Engine MQ Driver Messaging System Link MQSeries MQSeries The Messaging Gateway administration package, DBMS_MGWADM, provides an interface for gateway administrators to manage the gateway agent, set up propagation, and monitor propagation processing. Messaging Gateway 18-3
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Oracle9i Application Developer’s
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Contents Send Us Your Comments ....
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Enhanced Propagation Scheduling Cap
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Creating AQ Administrators and User
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Support for Statistics Views ......
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Removing an Alias from the LDAP Ser
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Priority and Ordering of Messages..
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Sending a Message Using a Queue Sen
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Specifying JMS Message Property as
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Gateway Agent .....................
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Enqueue of Messages for remote subs
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Send Us Your Comments Oracle9i Appl
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Preface This reference describes fe
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Chapter 9, "Administrative Interfac
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Conventions To download free releas
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Convention Meaning Example [] Brack
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Convention Meaning Example Special
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http://www.oracle.com/accessibility
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What’s New in Advanced Queuing? T
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The servlet parses the content of t
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Dequeue enhancements: Using the deq
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1 Introduction to Oracle Advanced Q
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Figure 1-1 Integrated Application E
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General Features of Advanced Queuin
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Support for Statistics Views Struct
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XMLType Payloads General Features o
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Figure 1-6 Architecture for Perform
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Correlation Identifiers Enqueue Fea
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Sender Identification Enqueue Featu
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Retries with Delays Dequeue Feature
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Third-Party Support Elements of Adv
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Recipient Elements of Advanced Queu
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Demos You can start a maximum of 10
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Table 1-1 Demos Demo and Locations
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The following basic components are
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Table 2-1 Type Name (type_name) Par
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Syntax TYPE aq$_subscriber_list_t I
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Table 2-4 Nonpersistent Queues Queu
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Table 2-7 lists the enumerated cons
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INIT.ORA Parameter File Considerati
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3 AQ Programmatic Environments This
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Table 3-1 (Cont.) AQ Programmatic E
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Examples Using Visual Basic (OO4O)
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Advanced Queuing Examples For JDK 1
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Oracle JMS Extensions Using Oracle
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Using the AQ XML Servlet to Access
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Table 3-2 Comparison of AQ Programm
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Alter a Subscriber DBMS_AQADM.alter
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Comparing AQ Programmatic Environme
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4 Managing AQ This chapter discusse
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Access to AQ Object Types Oracle 8.
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LNOCI Applications Queue Table Expo
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Importing Queue Table Data Creating
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Restrictions on Queue Management ig
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Propagation Issues Propagation Issu
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Propagation Issues all these circum
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Migrating To and From 8.0 Oracle 8.
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Security with 8.0-Style Queues Acce
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5 Performance and Scalability This
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Propagation Tuning Tips same segmen
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General Questions 6 Frequently Aske
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General Questions How do you associ
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General Questions 2 - Ex subscriber
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Messaging Gateway Questions mgwadm.
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Messaging Gateway Questions 3. Veri
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Propagation Questions Messaging Gat
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Transformation Questions Messaging
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Messaging Gateway Questions user. E
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Internet Access Questions Why doesn
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Performance Questions How do I use
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Installation Questions 2. Set up us
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Installation Questions NOTE: In Ora
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7 Modeling and Design This chapter
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Basic Queuing Basic Queuing Illustr
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Modeling Queue Entities Consumers A
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Multiconsumer Dequeuing of the Same
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Modeling Queue Entities produced by
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Modeling Queue Entities list of sub
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Modeling Queue Entities application
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Modeling Queue Entities whether the
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8 A Sample Application Using AQ In
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Structured Payloads General Feature
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For details on XMlType operations r
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end; Nonpersistent Queues END LOOP;
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OCIAttrGet((dvoid *)subscrhp, OCI_H
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printf("Initialization successful\n
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* End of file tkaqdocn.c */ Visual
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AQQueueTableProperty mqt_prop; AQQu
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Support for Statistics Views } Inte
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Enqueue Features cannot have the sa
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compatible => '8.1', \ primary_inst
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Enqueue Features set oraaq = OraDat
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{ AQSession aq_sess; AQQueue booked
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Time Specification: Delay } { /* Cr
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Set OraOrder = OraDatabase.CreateOr
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ack_order_queue_name := 'WS.WS_back
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} Message Grouping } catch (Excepti
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EXECUTE BOLADM.same_order_enq(’My
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dbms_aq.enqueue('WS.ws_bookedorders
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JOHN DASH 100 EXPRESS STREET REDWOO
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Dequeue Features messages with the
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* Dequeue the orders: */ CONNECT ES
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} Multiple Recipients catch (Except
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Dequeue Features init.ora parameter
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deq_cust_data BOLADM.customer_typ;
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Modes of Dequeuing if MsgIsDequeued
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Dequeue Features that the remove de
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Dequeue Features /* Dequeue all int
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} } } db_conn.commit(); Dequeue Fea
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Retry with Delay Interval Dequeue F
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* Create an AQ Session: */ aq_sess
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Dequeue Features DBMS_AQADM.START_Q
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Dequeue Features The following exam
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} Dequeue Features backorders_q = a
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Dequeue Features Eastern Region Sh
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END; queue_name => 'OS.OS_bookedord
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Dequeue Features Scenario In the cu
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no_message EXCEPTION; pragma EXCEPT
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* Get owner, queue where message is
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Dequeue Using the AQ XML Servlet As
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ub4 fedex; ub4 air; ub4 ground; };
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); printf("Initialization successfu
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sb4 errcode = 0; Asynchronous Notif
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Asynchronous Notifications BEGIN --
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Propagation Scenario Enhanced Pro
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PL/SQL (DBMS_AQADM Package): Exampl
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* Check if the schedule has been en
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length is a variable of type NUMBER
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Propagation Features retry time is
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Propagation Features Scenario In th
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import javax.servlet.*; import java
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dbms_aqadm.schedule_propagation('OE
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9 Administrative Interface This cha
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Use Case Model: Administrative Inte
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OR optional information add table d
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Creating a Queue Table Visual Basi
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dbms_aqadm.create_queue_table ( que
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q_table = aq_sess.createQueueTable
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Creating a Queue Table [Set Storage
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Altering a Queue Table PL/SQL (DBMS
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Dropping a Queue Table Figure 9-4 D
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force => TRUE); Java (JDBC): Droppi
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OR OR OR default optional informati
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Creating a queue within a queue tab
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} Creating a multiconsumer queue wi
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Creating a Nonpersistent Queue mess
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See Also: Table 9-1 for a list of a
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Dropping a Queue Figure 9-8 Droppin
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Java (JDBC): Dropping a Queue /* Dr
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Creating a Transformation Usage Not
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Modifying a Transformation Figure 9
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Applying a Transformation Figure 9-
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Dropping a Transformation PL/SQL (D
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Starting a Queue Syntax See Chapter
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Stopping a Queue Figure 9-14 Stoppi
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Java (JDBC): Stopping a Queue /* St
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Granting System Privilege See Chapt
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Revoking System Privilege Figure 9-
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Granting Queue Privilege Figure 9-1
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Revoking Queue Privilege Figure 9-1
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} AQQueue queue; /* Get the queue o
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Purpose Adds a default subscriber t
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* Where the transformation was crea
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agent1 = new AQAgent("East_Shipping
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See Also: Table 9-1 for a list of a
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’AQ.MSG_MAP1’); /* Alter the su
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Purpose Remove a default subscriber
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Scheduling a Queue Propagation Figu
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PL/SQL (DBMS_AQADM): Scheduling a Q
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Unscheduling a Queue Propagation Fi
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} AQAgent agent1; AQAgent agent2; /
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Note: The sys.aq$_message_types tab
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Altering a Propagation Schedule Fig
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eached by the database link another
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Enabling a Propagation Schedule Exa
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Disabling a Propagation Schedule Fi
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} AQQueue queue; AQAgent agent1; AQ
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Purpose Registers an agent for AQ I
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Purpose Alters an agent registered
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PL/SQL: Example not provided. VB (
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Enabling Database Access Examples S
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VB (OO4O): Example not provided. J
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Java (JDBC): Oracle9i Supplied Java
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Removing an Alias from the LDAP Ser
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10 Administrative Interface: Views
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Selecting All Queue Tables in Datab
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Selecting User Queue Tables Figure
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Selecting All Queues in Database Fi
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Selecting All Propagation Schedules
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Purpose This view describes the cur
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Selecting Queues for Which User Has
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Selecting Queues for Which User Has
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Selecting Messages in Queue Table F
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Table 10-8 (Cont.) View for Selecti
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Selecting Queue Tables in User Sche
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Selecting Queues In User Schema Fig
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Selecting Propagation Schedules in
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Purpose Table 10-11 USER_QUEUE_SCHE
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Selecting Queue Subscribers Figure
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Selecting Queue Subscribers and The
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Selecting the Number of Messages in
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Selecting the Number of Messages in
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Selecting the AQ Agents Registered
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Table 10-17 USER_TRANSFORMATIONS Co
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Table 10-19 DBA_TRANSFORMATIONS Col
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11 Operational Interface: Basic Ope
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Table 11-1 (Cont.) Use Case Model:
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Purpose Adds a message to the speci
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See Also: Purpose To specify the op
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Enqueuing a Message [Specify Messag
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Enqueuing a Message [Add Payload] S
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DBMS_AQ.ENQUEUE(queue_name => ’ms
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} Enqueuing a Message [Add Payload]
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} raw_payload.setStream(b_array, b_
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Listening to One or More Single-Con
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Listen to Single-Consumer Queue (Ti
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} Listening to One or More Single-C
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OCIEnvInit( &envhp, (ub4) OCI_DEFAU
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} Listening to One or More Single-C
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Listening to One or More Multiconsu
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Listening to One or More Multiconsu
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} Listening to One or More Multicon
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OCIEnv *envhp; OCIServer *srvhp; OC
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} printf("MESSAGE for :- \n"); GetA
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Usage Notes Search criteria and deq
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Dequeuing a Message from a Single-C
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Dequeuing a Message from a Single-C
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' of "RELATIVE_MSG_ID" Q.Navigation
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See Also: Dequeuing a Message from
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Registering for Notification Figure
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PL/SQL (DBMS_AQ Package): Not avail
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Registering for Notification [Speci
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Posting for Subscriber Notification
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Adding an Agent to the LDAP Server
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Removing an Agent from the LDAP Ser
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12 Creating Applications Using JMS
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J2EE Compliance General Features of
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JMS Connection and Session General
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General Features of JMS To connect
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General Features of JMS A JMS Conne
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General Features of JMS acknowledg
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General Features of JMS There are t
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alter() - alters a queue or topic G
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General Features of JMS CREATE USER
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General Features of JMS backed_orde
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General Features of JMS /* Check in
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General Features of JMS JMS time st
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Table 12-1 Message Header Fields Me
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General Features of JMS Stream Mess
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General Features of JMS Object Mess
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JMS_OracleDelay JMS_OracleOriginalM
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public String getRegion() { return
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eturn quantity; } } /* * BolBook -
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} this.custid = custid; this.name =
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Queue Sender JMS Point-to-Point Mod
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try { JMS Point-to-Point Model Feat
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JMS Publish-Subscribe Model Feature
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Durable Subscriber JMS Publish-Subs
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Example Code JMS Publish-Subscribe
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JMS Publish-Subscribe Model Feature
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TopicReceiver } System.out.println(
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Topic Browser } obj_message = (Obje
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} TopicBrowser browser; Topic topic
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JMS Message Producer Features Examp
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Time Specification - Delay } "OE_bo
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JMS Message Producer Features Examp
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JMS Message Producer Features The m
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} sender.send(obj_message); } catch
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} ObjectMessage obj_message; BolCus
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Message Navigation in Receive } new
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int new_orders = 1; try { JMS Messa
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JMS Message Consumer Features This
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JMS Message Consumer Features The m
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} } try { /* cast to JMS Object Mes
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{ } /* cast to JMS Object Message *
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JMS Message Consumer Features The m
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} } JMS Propagation 3. Receive expi
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JMS Propagation oe_ws from database
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* Create local subscriber - for pri
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JMS Propagation When a schedule is
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Maximum number of bytes propagated
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Message Transformation with JMS AQ
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Message Transformation with JMS AQ
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} Message Transformation with JMS A
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} Message Transformation with JMS A
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13 JMS Administrative Interface: Ba
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Use Case Model: JMS Administrative
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Registering a Queue/Topic Connectio
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Unregistering a Queue/Topic Connect
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Unregistering a Queue/Topic Connect
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Getting a Queue Connection Factory
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Getting a Queue Connection Factory
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Getting a Topic Connection Factory
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Getting a Topic Connection Factory
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Getting a Queue/Topic Connection Fa
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Getting a Queue/Topic in LDAP Figur
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See Also: Table 13-1 for a list of
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Getting a Queue Table Figure 13-15
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Specifying Destination Properties F
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Creating a Queue—Point-to-Point F
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Creating a Topic—Publish-Subscrib
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Granting System Privileges Figure 1
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Purpose Grant a topic privilege in
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Revoking Topic Privileges—Publish
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Purpose Grant a queue privilege in
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Purpose Revoke queue privilege in t
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Starting a Destination Usage Notes
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Purpose Stop a destination. Stoppin
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Syntax See Java (JDBC): Oracle9i Su
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TopicSession t_sess; Topic topic; (
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Enabling a Propagation Schedule Fig
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Altering a Propagation Schedule Fig
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Disabling a Propagation Schedule Fi
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14 JMS Operational Interface: Basic
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Creating a Queue Connection with Us
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See Also: Purpose Create a queue co
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Creating a Queue Connection with an
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Creating a Queue Session Figure 14-
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Sending a Message Using a Queue Sen
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Sending Messages Using a Queue Send
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Creating a Queue Browser for Queues
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Browsing Messages Using a Queue Bro
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Creating a Queue Receiver for Queue
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Creating a Queue Receiver for Queue
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Creating a Queue Connection with an
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Use Case Model: JMS Operational Int
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Usage Notes Not applicable. Creatin
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Creating a Topic Connection with De
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Creating a Topic Connection with an
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Syntax Java (JDBC): Oracle9i Suppli
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See Also: Publishing a Message Usin
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Publishing a Message Using a Topic
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See Also: Publishing a Message Usin
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Creating a Durable Subscriber for a
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See Also: Purpose Create a durable
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Example Creating a Durable Subscrib
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Creating a Remote Subscriber for To
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Creating a Remote Subscriber for To
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Example Creating a Remote Subscribe
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Unsubscribing a Durable Subscriptio
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Unsubscribing a Durable Subscriptio
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Creating a Topic Receiver for a Top
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See Also: Creating a Topic Receiver
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Creating a Topic Browser for Topics
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See Also: Creating a Topic Browser
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Browsing Messages Using a Topic Bro
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Use Case Model: JMS Operational Int
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Starting a JMS Connection Figure 16
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Usage Notes Not applicable. Committ
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See Also: Purpose Rollback All Oper
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Getting the Underlying OracleOCICon
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Creating a Map Message Usage Notes
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Creating a Stream Message Figure 16
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Creating a Text Message Refer to Ja
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Creating a JMS Message Figure 16-12
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Creating an ADT Message Syntax See
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Specifying Message Correlation ID F
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Specifying JMS Message Property Fig
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Setting Default TimeToLive for All
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Setting Default Priority for All Me
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Usage Notes Not applicable. Creatin
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Receiving a Message Synchronously U
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Specifying the Navigation Mode for
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Specifying a Message Listener to Re
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Specifying a Message Listener to Re
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Getting the Correlation ID of a Mes
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Purpose Get the Message ID of a Mes
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Getting the JMS Message Property Fi
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See Also: Purpose Get the Message P
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Purpose Get the Message Property as
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Getting the JMS Message Property as
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See Also: Purpose Get the Message P
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Closing a Message Producer Figure 1
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Stopping a JMS Connection Figure 16
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See Java (JDBC): Oracle9i Supplied
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Usage Notes Not applicable. Getting
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See Also: Purpose Get the Error Mes
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Printing the Stack Trace for the JM
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Getting the Exception Listener Usag
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Setting the Ping Period for the Exc
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Getting the Ping Period for the Exc
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17 Internet Access to Advanced Queu
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Figure 17-2 Architecture for Perfor
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SOAP Method Invocation The Internet
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Notifications from the server to th
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Message Payloads AQ supports messag
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Required elements are shown in bold
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scott 100 NEW URGENT EAST 1001
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scott 1111 Mary 5000 1996-01-01
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1 1 toyota john scott aqus
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scott The Internet Data Access P
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The Internet Data Access Presentati
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Page 889 and 890: Rollback Request Example A rollback
Page 891 and 892: . The Internet Data Access Presenta
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Page 895 and 896: Example A FAULT message has the fol
Page 897 and 898: IDAP Schema 'http://schemas.xmlsoap
Page 899 and 900: SOAP and AQ XML Schemas
Page 911 and 912: Deploying the AQ XML Servlet The AQ
Page 913 and 914: User Authentication $ORACLE_HOME/li
Page 915 and 916: Deploying the AQ XML Servlet Mappin
Page 917 and 918: } Hashtable env = new Hashtable(5,
Page 919 and 920: Deploying the AQ XML Servlet 2. Cre
Page 921 and 922: Using HTTP to Access the AQ XML Ser
Page 923 and 924: Using HTTP to Access the AQ XML Ser
Page 925 and 926: Figure 17-3 HTTP Advanced Queuing P
Page 927 and 928: . Map the AQ agent to a database us
Page 929 and 930: } db_drv.getCacheSize(10); this.set
Page 931 and 932: Customizing the AQ Servlet The void
Page 933 and 934: } this.setAQDataSource(db_drv); /*
Page 935: 18 Messaging Gateway Messaging Gate
Page 939 and 940: Gateway Agent Propagation Processin
Page 941 and 942: 1. Loading Database Objects into th
Page 943 and 944: Modifying tnsnames.ora: Example MGW
Page 945 and 946: Setup Verification Creating a Messa
Page 947 and 948: Working with Messaging Gateway desc
Page 949 and 950: The following command shuts down th
Page 951 and 952: end; Working with Messaging Gateway
Page 953 and 954: Working with Messaging Gateway The
Page 955 and 956: The propagation type (inbound or ou
Page 957 and 958: end; Working with Messaging Gateway
Page 959 and 960: Working with Messaging Gateway inst
Page 961 and 962: Converting Messages Converting Mess
Page 963 and 964: Messaging Gateway Canonical Types C
Page 965 and 966: Converting Messages An AQ payload o
Page 967 and 968: Converting Messages The MQSeries fi
Page 969 and 970: Converting Messages Advanced Queuin
Page 971 and 972: Table 18-4 Messaging Gateway Names
Page 973 and 974: Table 18-5 MQSeries Header Default
Page 975 and 976: queue_name => ’AQ_book_orders’,
Page 977 and 978: Converting Messages Propagating Inb
Page 979 and 980: File Contents Initialization Parame
Page 981 and 982: Format: set CLASSPATH= The mgw.ora
Page 983 and 984: A Oracle Advanced Queuing by Exampl
Page 985 and 986: - Managing Propagation From One Que
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Creating a Queue Table and Queue of
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Creating an Java AQ Session Creatin
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Creating a Queue and Start Enqueue/
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Enqueuing and Dequeuing Of Messages
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EXEC SQL CONNECT :user; /* On an or
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{ OCIEnv *envhp; OCIServer *srvhp;
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public static void AQObjectPayloadT
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this.empNo = empNo; } ////// implem
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} /* Enqueue a message in test_queu
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void sql_error(msg) char *msg; { EX
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} Enqueuing and Dequeuing of RAW Ty
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} /* Get a handle to a queue - aq_q
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AQRawPayload raw_payload; AQEnqueue
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DBMS_AQ.ENQUEUE(queue_name => ’pr
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} } else m_property.setPriority(3);
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and remove RED from queue: */ DECLA
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char subject[30]; /* components of
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* Bind the host variable ’message
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int main() { OCIEnv *envhp; OCIServ
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ecipients DBMS_AQ.aq$_recipient_lis
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WHEN no_messages THEN DBMS_OUTPUT.P
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dequeue_options.navigation := DBMS_
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SELECT t.user_data.data INTO lob_lo
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Connection db_conn = null; AQEnqueu
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} Thread.sleep(30000); // dequeue m
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END; BEGIN DBMS_AQADM.SCHEDULE_PROP
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queue_name => ’q1def’, destinat
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EXECUTE DBMS_AQADM.DROP_QUEUE ( que
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* XA open string */ char xaoinfo[]
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Deploying AQ with XA envhp = xaoEnv
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#include #endif #include static v
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ub4 buflen; OCIInitialize((ub4) OCI
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struct message { OCINumber id; OCIS
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AQ and Memory Usage OCIHandleAlloc(
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OCIInd null_adt; OCIInd null_id; OC
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(ub4) OCI_ATTR_SERVER, (OCIError *)
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LNOCIError *errhp; LNOCISvcCtx *svc
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OCIAttrSet((dvoid *)svchp, (ub4)OCI
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B Oracle JMS Interfaces, Classes, a
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Table B-1 (Cont.) Interfaces, Class
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Oracle JMSClasses (part 1) Figure B
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Oracle JMS Classes (part 2) Figure
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See Also: "Interface - javax.jms.M
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See Also: "Interface - javax.jms.Q
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Oracle JMS Classes (part 10 continu
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readBoolean() readByte() readBytes(
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See Also: "Oracle JMSClasses (part
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setDouble(String, double) setFloat(
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See Also: "Oracle JMS Classes (par
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close() commit() createBytesMessage
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writeString(String) Interface - jav
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getErrorCode() getLinkedException()
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getNavigationMode() receiveNoData()
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getAdtPayload() setAdtPayload(Custo
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STATE_WAITING TRANSACTIONAL WAIT_FO
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INFINITE NORMAL_QUEUE > AQjmsDestin
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Class - oracle.jms.AQjmsSession > o
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Interfaces, Classes, and Exceptions
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Exception oracle.jms.AQjmsMessageEO
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setPrimaryInstance(int inst) setSec
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C Scripts for Implementing BooksOnL
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tkaqdoca.sql: Script to Create User
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connect CS/CS tkaqdocd.sql: Example
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wait_time INTEGER := 120; no_messag
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tkaqdoce.sql: Operational Examples
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tkaqdocp.sql: Examples of Operation
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egin end; dopt.consumer_name := con
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end; / show errors; tkaqdocp.sql: E
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grant execute on shipping_bookedord
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end; / show errors; tkaqdocp.sql: E
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tkaqdocc.sql: Clean-Up Script tkaqd
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D JMS and AQ XML Servlet Error Mess
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JMS Error Messages Cause: An attemp
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JMS Error Messages Action: The vali
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JMS Error Messages Cause: An attemp
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JMS-163 Message not Writeable Cause
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JMS Error Messages Action: Specify
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JMS Error Messages Cause: There is
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AQ XML Servlet Error Messages JMS-4
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Action: The valid navigation modes
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Action: Specify a valid data source
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E Unified Modeling Language Diagram
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Use Case Diagrams As shown in Figur
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equires that you first create a te
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Figure E-9 Required and Optional Op
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State Diagrams Figure E-11 A Class
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A access control. See system-level
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features, 8-58 message navigation,
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Interface - javax.jms.TopicSession,
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operational interface basic operati
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R basic, 7-3 basic, one producer, o
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V view, 10-1 attributes, 10-1 views
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Advanced Queuing - Oracle

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