Advanced Queuing - Oracle

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Using OCI to Access AQ Grant and revoke privileges Add, remove, alter subscriber Add, remove, alter AQ Internet agents Grant or revoke privileges of database users to AQ Internet agents Enable, disable, and alter propagation schedule Enqueue messages to single consumer queue (point-to-point model) Publish messages to multiconsumer queue/topic (publish-subscribe model) Subscribing for messages in multiconsumer queue Browse messages in a queue Using OCI to Access AQ Receive messages from queue/topic Register to receive messages asynchronously Listen for messages on multiple queues/topics Post messages to anonymous subscriptions Bind or unbind agents in a LDAP server Add or remove aliases to AQ objects in a LDAP server See Also: Oracle9i Supplied PL/SQL Packages and Types Reference for detailed documentation, including parameters, parameter types, return values, examples, DBMS_AQADM and DBMS_AQ syntax. Available PL/SQL DBMS_AQADM and DBMS_AQ functions are listed in detail in Table 3–2 through Table 3–9. Oracle Call Interface (OCI) provides an interface to Oracle Advanced Queuing functions using the native AQ interface. An OCI client can perform the following actions: Enqueue messages Dequeue messages Listen for messages on sets of queues 3-4 Oracle9i Application Developer’s Guide - Advanced Queuing
Examples Using Visual Basic (OO4O) to Access AQ Register to receive message notifications In addition, OCI clients can receive asynchronous notifications for new messages in a queue using OCISubscriptionRegister. See: Oracle Call Interface Programmer’s Guide: “OCI and Advanced Queuing” and “Publish-Subscribe Notification” sections, for syntax details. For queues with user-defined payload type, OTT must be used to generate the OCI mapping for the Oracle type. The OCI client is responsible for freeing the memory of the AQ descriptors and the message payload. LNOCI Interface See Appendix A, "Oracle Advanced Queuing by Example" under "Enqueuing and Dequeuing Of Messages" on page A-11 for OCI Advanced Queuing interface examples. Managing OCI Descriptor Memory See Appendix A, "Oracle Advanced Queuing by Example" under "AQ and Memory Usage" on page A-72 for examples illustrating memory management of OCI descriptors. Using Visual Basic (OO4O) to Access AQ Visual Basic (OO4O) supports access to Oracle Advanced Queuing operational functions using the native AQ interface. These functions include the following: Create: connection, RAW message, message with structured data Enqueue messages to single consumer queue (point-to-point model) Publish messages to multiconsumer queue/topic (publish-subscribe model) Browse messages in a queue Receive messages from queue/topic Register to received messages asynchronously AQ Programmatic Environments 3-5
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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
Page 35 and 36: http://www.oracle.com/accessibility
Page 37 and 38: What’s New in Advanced Queuing? T
Page 39 and 40: The servlet parses the content of t
Page 41 and 42: Dequeue enhancements: Using the deq
Page 43 and 44: 1 Introduction to Oracle Advanced Q
Page 45 and 46: Figure 1-1 Integrated Application E
Page 47 and 48: General Features of Advanced Queuin
Page 49 and 50: General Features of Advanced Queuin
Page 51 and 52: Support for Statistics Views Struct
Page 53 and 54: XMLType Payloads General Features o
Page 55 and 56: Figure 1-6 Architecture for Perform
Page 57 and 58: Correlation Identifiers Enqueue Fea
Page 59 and 60: Sender Identification Enqueue Featu
Page 61 and 62: Retries with Delays Dequeue Feature
Page 63 and 64: Third-Party Support Elements of Adv
Page 65 and 66: Recipient Elements of Advanced Queu
Page 67 and 68: Demos You can start a maximum of 10
Page 69 and 70: Table 1-1 Demos Demo and Locations
Page 71 and 72: The following basic components are
Page 73 and 74: Table 2-1 Type Name (type_name) Par
Page 75 and 76: Syntax TYPE aq$_subscriber_list_t I
Page 77 and 78: Table 2-4 Nonpersistent Queues Queu
Page 79 and 80: Table 2-7 lists the enumerated cons
Page 81 and 82: INIT.ORA Parameter File Considerati
Page 83 and 84: 3 AQ Programmatic Environments This
Page 85: Table 3-1 (Cont.) AQ Programmatic E
Page 89 and 90: Advanced Queuing Examples For JDK 1
Page 91 and 92: Oracle JMS Extensions Using Oracle
Page 93 and 94: Using the AQ XML Servlet to Access
Page 95 and 96: Table 3-2 Comparison of AQ Programm
Page 97 and 98: Alter a Subscriber DBMS_AQADM.alter
Page 99 and 100: Comparing AQ Programmatic Environme
Page 111 and 112: 4 Managing AQ This chapter discusse
Page 113 and 114: Access to AQ Object Types Oracle 8.
Page 115 and 116: LNOCI Applications Queue Table Expo
Page 117 and 118: Importing Queue Table Data Creating
Page 119 and 120: Restrictions on Queue Management ig
Page 121 and 122: Propagation Issues Propagation Issu
Page 123 and 124: Propagation Issues all these circum
Page 125 and 126: Migrating To and From 8.0 Oracle 8.
Page 127 and 128: Security with 8.0-Style Queues Acce
Page 129 and 130: 5 Performance and Scalability This
Page 131 and 132: Propagation Tuning Tips same segmen
Page 133 and 134: General Questions 6 Frequently Aske
Page 135 and 136: 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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General Features of Advanced Queuin
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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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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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Deploying the AQ XML Servlet The AQ
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User Authentication $ORACLE_HOME/li
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Deploying the AQ XML Servlet Mappin
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} Hashtable env = new Hashtable(5,
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Deploying the AQ XML Servlet 2. Cre
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Using HTTP to Access the AQ XML Ser
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Using HTTP to Access the AQ XML Ser
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Figure 17-3 HTTP Advanced Queuing P
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. Map the AQ agent to a database us
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} db_drv.getCacheSize(10); this.set
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Customizing the AQ Servlet The void
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} this.setAQDataSource(db_drv); /*
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18 Messaging Gateway Messaging Gate
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Messaging Gateway Architecture For
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Gateway Agent Propagation Processin
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1. Loading Database Objects into th
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Modifying tnsnames.ora: Example MGW
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Setup Verification Creating a Messa
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Working with Messaging Gateway desc
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The following command shuts down th
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end; Working with Messaging Gateway
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Working with Messaging Gateway The
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The propagation type (inbound or ou
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end; Working with Messaging Gateway
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Working with Messaging Gateway inst
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Converting Messages Converting Mess
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Messaging Gateway Canonical Types C
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Converting Messages An AQ payload o
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Converting Messages The MQSeries fi
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Converting Messages Advanced Queuin
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Table 18-4 Messaging Gateway Names
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Table 18-5 MQSeries Header Default
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queue_name => ’AQ_book_orders’,
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Converting Messages Propagating Inb
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File Contents Initialization Parame
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Format: set CLASSPATH= The mgw.ora
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A Oracle Advanced Queuing by Exampl
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- 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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