Advanced Queuing - Oracle

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A Sample Application Using JMS A Sample Application Using JMS The operations of a large bookseller, BooksOnLine, are based on an online book ordering system that automates activities across the various departments involved in the entire sale process. The front end of the system is an order entry application where new orders are entered. These incoming orders are processed by an order processing application that validates and records the order. Shipping departments located at regional warehouses are then responsible for ensuring that these orders are shipped in a timely fashion. There are three regional warehouses: one serving the East Region, one serving the West Region, and a third warehouse for shipping International orders. Once an order has been shipped, the order information is routed to a central billing department that handles payment processing. The customer service department, located at its own site, is responsible for maintaining order status and handling inquiries about orders. In Chapter 1 we outlined a messaging system for an imaginary company, BooksOnLine. In this chapter we consider the features of the JMS interface to AQ in the context of a sample application based on that scenario. This sample application has been devised for the sole purpose of demonstrating the features of Oracle AQ. Our aim in creating this integrated scenario is to make it easier to grasp the possibilities of this technology by locating our explanations within a single context. However, it is not possible within the scope of a single relatively small code sample to demonstrate every possible application of AQ. General Features of JMS The following topics are discussed in this section: J2EE Compliance JMS Connection and Session JMS Destinations - Queue and Topic System-Level Access Control in JMS Destination-Level Access Control in JMS Retention and Message History in JMS Supporting Oracle Real Application Clusters in JMS Supporting Statistics Views in JMS Structured Payload/Message Types in JMS 12-2 Oracle9i Application Developer’s Guide - Advanced Queuing
J2EE Compliance General Features of JMS In release 9.2, Oracle JMS conforms to the Sun Microsystems JMS 1.0.2b standard. You can define the J2EE compliance mode for an OJMS client at run time. For compliance, set the Java property "oracle.jms.j2eeCompliant" to TRUE as a command line option. For noncompliance, do nothing. FALSE is the default value. New features in release 9.2 support J2EE compliance and are also available in the noncompliant mode. These include support for: Nontransacted sessions Nondurable subscribers Temporary queues and topics Nonpersistent delivery mode Multiple JMS messages types on a single JMS queue or topic (using AQ queues of the AQ$_JMS_MESSAGE type) The noLocal option for durable subscribers See Also: Java Message Service Specification, version 1.0.2b, published by Sun Microsystems, Inc. Features of JMSPriority, JMSExpiration, and nondurable subscribers vary depending on which mode you use. JMSPriority JMSPriority values depend on whether you are running the default, noncompliant mode or the compliant mode, in which you set the compliance flag to TRUE: In noncompliant mode, java.lang.Integer.MAX_VALUE is the lowest priority, java.lang.Integer.MIN_VALUE is the highest priority, and 1 is the default priority. In compliant mode, 0 is the lowest priority, 9 is the highest priority, and 4 is the default priority. JMSExpiration JMSExpiration values depend on whether you are running the default, noncompliant mode or the compliant mode, in which you set the compliance flag to TRUE: Creating Applications Using JMS 12-3
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Oracle9i Application Developer’s
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Contents Send Us Your Comments ....
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Enhanced Propagation Scheduling Cap
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Creating AQ Administrators and User
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Support for Statistics Views ......
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Removing an Alias from the LDAP Ser
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Priority and Ordering of Messages..
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Sending a Message Using a Queue Sen
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Specifying JMS Message Property as
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Gateway Agent .....................
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Enqueue of Messages for remote subs
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Send Us Your Comments Oracle9i Appl
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Preface This reference describes fe
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Chapter 9, "Administrative Interfac
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Conventions To download free releas
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Convention Meaning Example [] Brack
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Convention Meaning Example Special
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http://www.oracle.com/accessibility
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What’s New in Advanced Queuing? T
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The servlet parses the content of t
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Dequeue enhancements: Using the deq
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1 Introduction to Oracle Advanced Q
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Figure 1-1 Integrated Application E
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General Features of Advanced Queuin
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Support for Statistics Views Struct
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XMLType Payloads General Features o
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Figure 1-6 Architecture for Perform
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Correlation Identifiers Enqueue Fea
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Sender Identification Enqueue Featu
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Retries with Delays Dequeue Feature
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Third-Party Support Elements of Adv
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Recipient Elements of Advanced Queu
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Demos You can start a maximum of 10
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Table 1-1 Demos Demo and Locations
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The following basic components are
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Table 2-1 Type Name (type_name) Par
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Syntax TYPE aq$_subscriber_list_t I
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Table 2-4 Nonpersistent Queues Queu
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Table 2-7 lists the enumerated cons
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INIT.ORA Parameter File Considerati
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3 AQ Programmatic Environments This
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Table 3-1 (Cont.) AQ Programmatic E
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Examples Using Visual Basic (OO4O)
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Advanced Queuing Examples For JDK 1
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Oracle JMS Extensions Using Oracle
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Using the AQ XML Servlet to Access
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Table 3-2 Comparison of AQ Programm
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Alter a Subscriber DBMS_AQADM.alter
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Comparing AQ Programmatic Environme
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4 Managing AQ This chapter discusse
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Access to AQ Object Types Oracle 8.
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LNOCI Applications Queue Table Expo
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Importing Queue Table Data Creating
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Restrictions on Queue Management ig
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Propagation Issues Propagation Issu
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Propagation Issues all these circum
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Migrating To and From 8.0 Oracle 8.
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Security with 8.0-Style Queues Acce
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5 Performance and Scalability This
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Propagation Tuning Tips same segmen
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General Questions 6 Frequently Aske
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General Questions How do you associ
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General Questions 2 - Ex subscriber
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Messaging Gateway Questions mgwadm.
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Messaging Gateway Questions 3. Veri
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Propagation Questions Messaging Gat
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Transformation Questions Messaging
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Messaging Gateway Questions user. E
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Internet Access Questions Why doesn
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Performance Questions How do I use
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Installation Questions 2. Set up us
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Installation Questions NOTE: In Ora
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7 Modeling and Design This chapter
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Basic Queuing Basic Queuing Illustr
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Modeling Queue Entities Consumers A
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Multiconsumer Dequeuing of the Same
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Modeling Queue Entities produced by
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Modeling Queue Entities list of sub
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Modeling Queue Entities application
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Modeling Queue Entities whether the
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8 A Sample Application Using AQ In
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Structured Payloads General Feature
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For details on XMlType operations r
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end; Nonpersistent Queues END LOOP;
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OCIAttrGet((dvoid *)subscrhp, OCI_H
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printf("Initialization successful\n
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* End of file tkaqdocn.c */ Visual
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AQQueueTableProperty mqt_prop; AQQu
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Support for Statistics Views } Inte
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Enqueue Features cannot have the sa
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compatible => '8.1', \ primary_inst
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Enqueue Features set oraaq = OraDat
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{ AQSession aq_sess; AQQueue booked
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Time Specification: Delay } { /* Cr
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Set OraOrder = OraDatabase.CreateOr
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ack_order_queue_name := 'WS.WS_back
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} Message Grouping } catch (Excepti
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EXECUTE BOLADM.same_order_enq(’My
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dbms_aq.enqueue('WS.ws_bookedorders
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JOHN DASH 100 EXPRESS STREET REDWOO
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Dequeue Features messages with the
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* Dequeue the orders: */ CONNECT ES
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} Multiple Recipients catch (Except
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Dequeue Features init.ora parameter
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deq_cust_data BOLADM.customer_typ;
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Modes of Dequeuing if MsgIsDequeued
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Dequeue Features that the remove de
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Dequeue Features /* Dequeue all int
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} } } db_conn.commit(); Dequeue Fea
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Retry with Delay Interval Dequeue F
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* Create an AQ Session: */ aq_sess
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Dequeue Features DBMS_AQADM.START_Q
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Dequeue Features The following exam
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} Dequeue Features backorders_q = a
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Dequeue Features Eastern Region Sh
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END; queue_name => 'OS.OS_bookedord
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Dequeue Features Scenario In the cu
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no_message EXCEPTION; pragma EXCEPT
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* Get owner, queue where message is
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Dequeue Using the AQ XML Servlet As
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ub4 fedex; ub4 air; ub4 ground; };
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); printf("Initialization successfu
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sb4 errcode = 0; Asynchronous Notif
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Asynchronous Notifications BEGIN --
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Propagation Scenario Enhanced Pro
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PL/SQL (DBMS_AQADM Package): Exampl
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* Check if the schedule has been en
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length is a variable of type NUMBER
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Propagation Features retry time is
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Propagation Features Scenario In th
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import javax.servlet.*; import java
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dbms_aqadm.schedule_propagation('OE
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9 Administrative Interface This cha
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Use Case Model: Administrative Inte
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OR optional information add table d
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Creating a Queue Table Visual Basi
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dbms_aqadm.create_queue_table ( que
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q_table = aq_sess.createQueueTable
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Creating a Queue Table [Set Storage
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Altering a Queue Table PL/SQL (DBMS
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Dropping a Queue Table Figure 9-4 D
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force => TRUE); Java (JDBC): Droppi
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OR OR OR default optional informati
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Creating a queue within a queue tab
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} Creating a multiconsumer queue wi
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Creating a Nonpersistent Queue mess
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See Also: Table 9-1 for a list of a
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Dropping a Queue Figure 9-8 Droppin
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Java (JDBC): Dropping a Queue /* Dr
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Creating a Transformation Usage Not
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Modifying a Transformation Figure 9
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Applying a Transformation Figure 9-
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Dropping a Transformation PL/SQL (D
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Starting a Queue Syntax See Chapter
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Stopping a Queue Figure 9-14 Stoppi
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Java (JDBC): Stopping a Queue /* St
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Granting System Privilege See Chapt
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Revoking System Privilege Figure 9-
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Granting Queue Privilege Figure 9-1
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Revoking Queue Privilege Figure 9-1
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} AQQueue queue; /* Get the queue o
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Purpose Adds a default subscriber t
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* Where the transformation was crea
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agent1 = new AQAgent("East_Shipping
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See Also: Table 9-1 for a list of a
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’AQ.MSG_MAP1’); /* Alter the su
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Purpose Remove a default subscriber
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Scheduling a Queue Propagation Figu
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PL/SQL (DBMS_AQADM): Scheduling a Q
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Unscheduling a Queue Propagation Fi
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} AQAgent agent1; AQAgent agent2; /
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Note: The sys.aq$_message_types tab
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Altering a Propagation Schedule Fig
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eached by the database link another
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Enabling a Propagation Schedule Exa
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Disabling a Propagation Schedule Fi
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} AQQueue queue; AQAgent agent1; AQ
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Purpose Registers an agent for AQ I
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Purpose Alters an agent registered
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PL/SQL: Example not provided. VB (
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Enabling Database Access Examples S
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VB (OO4O): Example not provided. J
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Java (JDBC): Oracle9i Supplied Java
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Removing an Alias from the LDAP Ser
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10 Administrative Interface: Views
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Selecting All Queue Tables in Datab
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Selecting User Queue Tables Figure
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Selecting All Queues in Database Fi
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Selecting All Propagation Schedules
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Purpose This view describes the cur
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Selecting Queues for Which User Has
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Selecting Queues for Which User Has
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Selecting Messages in Queue Table F
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Table 10-8 (Cont.) View for Selecti
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Selecting Queue Tables in User Sche
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Selecting Queues In User Schema Fig
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Selecting Propagation Schedules in
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Purpose Table 10-11 USER_QUEUE_SCHE
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Selecting Queue Subscribers Figure
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Selecting Queue Subscribers and The
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Selecting the Number of Messages in
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Selecting the Number of Messages in
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Selecting the AQ Agents Registered
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Table 10-17 USER_TRANSFORMATIONS Co
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Table 10-19 DBA_TRANSFORMATIONS Col
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11 Operational Interface: Basic Ope
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Table 11-1 (Cont.) Use Case Model:
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Purpose Adds a message to the speci
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See Also: Purpose To specify the op
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Enqueuing a Message [Specify Messag
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Enqueuing a Message [Add Payload] S
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DBMS_AQ.ENQUEUE(queue_name => ’ms
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} Enqueuing a Message [Add Payload]
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} raw_payload.setStream(b_array, b_
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Page 467 and 468: } Listening to One or More Single-C
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Page 479 and 480: } Listening to One or More Multicon
Page 481 and 482: OCIEnv *envhp; OCIServer *srvhp; OC
Page 483 and 484: } printf("MESSAGE for :- \n"); GetA
Page 485 and 486: Usage Notes Search criteria and deq
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Page 493 and 494: See Also: Dequeuing a Message from
Page 495 and 496: Registering for Notification Figure
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Page 507 and 508: Posting for Subscriber Notification
Page 509 and 510: Adding an Agent to the LDAP Server
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Page 513: 12 Creating Applications Using JMS
Page 517 and 518: JMS Connection and Session General
Page 519 and 520: General Features of JMS To connect
Page 521 and 522: General Features of JMS A JMS Conne
Page 523 and 524: General Features of JMS acknowledg
Page 525 and 526: General Features of JMS There are t
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Page 529 and 530: General Features of JMS CREATE USER
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Page 535 and 536: General Features of JMS JMS time st
Page 537 and 538: Table 12-1 Message Header Fields Me
Page 539 and 540: General Features of JMS Stream Mess
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Page 543 and 544: JMS_OracleDelay JMS_OracleOriginalM
Page 545 and 546: public String getRegion() { return
Page 547 and 548: eturn quantity; } } /* * BolBook -
Page 549 and 550: } this.custid = custid; this.name =
Page 551 and 552: Queue Sender JMS Point-to-Point Mod
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Page 555 and 556: JMS Publish-Subscribe Model Feature
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Page 559 and 560: Example Code JMS Publish-Subscribe
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Page 563 and 564: 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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Page 845 and 846:
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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OCIEnvInit( &envhp, (ub4) OCI_DEFAU
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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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