Advanced Queuing - Oracle

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Converting Messages The Message Conversion Process When a message is propagated by the gateway, the message is converted from the native format of the source queue to the native format of the destination queue. A native message contains a message header and a message body. The header contains the fixed header fields that all messages in a messaging system have, such as message properties in Advanced Queuing and the fixed header in MQSeries. The body contains message contents, such as the AQ payload and the MQSeries message body. Messaging Gateway converts both message header and message body components. Message conversion is done in two stages, as shown in Figure 18–2. A message is converted from the native format of the source queue to the gateway internal message format first, and then from the internal message format to the native format of the destination queue. Figure 18–2 Message Conversion Advanced Queuing Message AQ Property AQ Payload Messaging Gateway Message AQ Property Canonical Type The gateway agent uses an internal message format consisting of a header that is the same as the AQ message properties and a body that is an object of the gateway canonical types. 18-28 Oracle9i Application Developer’s Guide - Advanced Queuing Non-Oracle Message Message Outbound Propagation Inbound Propagation
Messaging Gateway Canonical Types Converting Messages Messaging Gateway defines canonical types to support message conversion between Advanced Queuing and non-Oracle messaging systems. A canonical type is a message type representation in the form of a PL/SQL abstract data type (ADT) in the Oracle9i database. In release 9.2, the canonical type MGW_BASIC_MSG_T supports conversion between Advanced Queuing and MQSeries. MGW_BASIC_MSG_T is used to represent messages that have a message header and a TEXT or RAW (bytes) message body. The message header is represented as a set of {name,value} pairs, which are objects of the MGW_NAME_VALUE_T type. See Also: Oracle9i Supplied PL/SQL Packages and Types Reference, DBMS_MGWMSG, for Syntax and attribute information for MGW_BASIC_MSG_T Syntax and attribute information for MGW_NAME_VALUE_T A list of constants for the MGW_NAME_VALUE_T value types Helper routines for MGW_NAME_VALUE_ARRAY_T Message Conversion for Advanced Queuing Native AQ messages consist of AQ message properties and a message payload of either RAW or a user-defined ADT type. The Messaging Gateway agent converts messages between the native AQ message format and the internal message format. Figure 18–3 illustrates the message conversion performed by the AQ driver. Messaging Gateway 18-29
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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 The Internet Data Access P
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The Internet Data Access Presentati
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The Internet Data Access Presenta
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Rollback Request Example A rollback
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. The Internet Data Access Presenta
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Example A FAULT message has the fol
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IDAP Schema 'http://schemas.xmlsoap
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SOAP and AQ XML Schemas
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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 and 936: 18 Messaging Gateway Messaging Gate
Page 937 and 938: Messaging Gateway Architecture For
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: Converting Messages Converting Mess
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
Page 987 and 988: Creating a Queue Table and Queue of
Page 989 and 990: Creating an Java AQ Session Creatin
Page 991 and 992: Creating a Queue and Start Enqueue/
Page 993 and 994: Enqueuing and Dequeuing Of Messages
Page 995 and 996: EXEC SQL CONNECT :user; /* On an or
Page 997 and 998: { OCIEnv *envhp; OCIServer *srvhp;
Page 999 and 1000: public static void AQObjectPayloadT
Page 1001 and 1002: this.empNo = empNo; } ////// implem
Page 1003 and 1004: } /* Enqueue a message in test_queu
Page 1005 and 1006: void sql_error(msg) char *msg; { EX
Page 1007 and 1008: } Enqueuing and Dequeuing of RAW Ty
Page 1009 and 1010: } /* Get a handle to a queue - aq_q
Page 1011 and 1012: 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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Enqueuing and Dequeuing Of Messages
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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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