web server - Borland Technical Publications

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Chapter 6 6Java Session Service (JSS) Chapter configuration The Java Session Service (JSS) is a service that stores information pertaining to a specific user session. JSS is used to store session information for recovery in case of container failure. Borland provides an Interface Definition Language (IDL) interface for the use of JSS. Two implementations are bundled, one using DataExpress and another with any JDBC capable database. JSS provides a mechanism to easily store session information in a database. For example, in a shopping cart scenario, information about your session (the number of items in the shopping cart, and such) is stored by the JSS. So, if a session is interrupted by a Borland web container unexpectedly going down, the session information is recoverable by another Borland web container instance through the JSS. The JSS must be running on the local network. Any web container (within the cluster configuration) finds the JSS and connects to it and continues session management. For more information about the Borland web container, go to Chapter 4, “Web components.” Session management with JSS The following diagrams show typical landscapes of web components and how session information is managed by the JSS. The JSS session management is completely transparent to the client. In the “JSS Management with a Centralized JSS and Two Web Containers” diagram, there are four virtual machines: ■ ■ ■ The first machine hosts the Apache web server, two other machines contain an instance of the Borland web container, and the fourth machine hosts the JSS and relational database (JDataStore or a JDBC datasource). Chapter 6: Java Session Service (JSS) configuration 57
Session management with JSS If an interruption occurs between the Apache web server (Machine 1) which is passing a client request to the first web container instance (Machine 2), then the second web container instance (Machine 3) can continue processing the client request by retrieving the session information from the JSS (Machine 4). The items in the Shopping Cart are retained and the client request continues to be processed. Figure 6.1 JSS Management with a Centralized JSS and Two Web Containers In the “JSS Management with Two Web Containers and a Centralized Backend Datastore” diagram, are the following four virtual machines: ■ ■ ■ The first machine hosts the Apache web server, the two other machines contain an instance of the Borland web container as well as each hosting the JSS, and the fourth machine hosts the relational database (JDataStore or a JDBC datasource). If an interruption occurs between the Apache web server (Machine 1) which is passing a client request to the first web container instance (Machine 2), then the second web container instance (Machine 3) can continue processing the client request by retrieving the session information from the JSS (Machine 4). The items in the Shopping Cart are retained and the client request continues to be processed. 58 BES Developer’s Guide
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Developer’s Guide Enterprise Serv
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Contents Chapter 1 Introduction to
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Entity beans . . . . . . . . . . .
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Chapter 23 Using JMS 209 Configurin
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Entity Bean Properties (applicable
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Figures 0.1 Borland Enterprise Serv
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BES Products and Editions overview
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Documentation conventions Important
Page 17 and 18: Contacting Borland support World Wi
Page 19 and 20: BES services overview Figure 0.1 Bo
Page 21 and 22: The Partition and its services ■
Page 23 and 24: Borland Enterprise Server and J2EE
Page 25 and 26: 14 BES Developer’s Guide
Page 27 and 28: Creating Partitions Creating Partit
Page 29 and 30: Running Partitions Table 3.1 Option
Page 31 and 32: Configuring Partitions You can also
Page 33 and 34: JMX support in Partitions ■ ■ A
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Page 37 and 38: Thread pools Partition properties r
Page 41 and 42: Apache web server implementation Fo
Page 43 and 44: Borland web container implementatio
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Page 53 and 54: Apache web server to Borland web co
Page 59 and 60: Large data transfer Downloading lar
Page 61 and 62: Large data transfer Uploading large
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Page 71 and 72: Managing and configuring the JSS Co
Page 73 and 74: The Borland IIOP connector BES supp
Page 75 and 76: Setting up your web container with
Page 79 and 80: Web-enabling your CORBA server Impo
Page 81 and 82: Configuring your Apache web server
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Page 85 and 86: Web Services and Partitions ■ ■
Page 87 and 88: Web Service providers Java:RPC prov
Page 89 and 90: How Borland Web Services work
Page 91 and 92: Packaging Web Service Application A
Page 93 and 94: Tools Overview Java2WSDL tool Note
Page 97 and 98: Client view of an enterprise bean L
Page 99 and 100: Client view of an enterprise bean E
Page 101 and 102: Managing transactions Managing tran
Page 103 and 104: Support for JNDI Support for JNDI T
Page 105 and 106: EJB to CORBA mapping A CORBA progra
Page 109 and 110: Application Client architecture Pac
Page 111 and 112: Document Type Definitions (DTDs) my
Page 113 and 114: Support of references and links The
Page 115 and 116: Use of Manifest files Use of Manife
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Sessions in secondary storage If yo
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110 BES Developer’s Guide
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Container-managed persistence and R
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Implementing an entity bean Generat
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Container-Managed Persistence in Bo
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Setting Properties Setting Properti
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Setting Properties into a BLOB. The
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Setting Properties Automatic table
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Container-managed persistence and R
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Setting Properties J2EE 1.3 Entity
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Setting Properties Figure 16.2 Edit
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Setting Properties Table 16.1 ejb.m
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Setting Properties Table 16.3 Table
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Setting Properties Security Propert
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Aggregate Functions in EJB-QL Selec
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Support for ORDER BY Support for OR
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Overriding SQL generated from EJB-Q
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Container-managed data access suppo
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Generating primary keys from a cust
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Implementing primary key generation
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Transaction manager services Consis
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Transaction manager services When t
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Transaction manager services Follow
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Declarative transaction management
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Declarative transaction management
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JDBC API Modifications JDBC API Mod
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Handling of EJB exceptions Applicat
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Client View of an MDB Client View o
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Clustering of MDBs This is yet anot
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Error Recovery Redelivered messages
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JNDI Definitions Module Important s
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Disabling and Enabling a Deployed D
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Configuring JDBC Datasources In the
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Configuring JDBC Datasources To add
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Defining the Connection Pool Proper
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Defining the Connection Pool Proper
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Descriptions of Borland Enterprise
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Advanced Topics for Defining JDBC D
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Connecting to JDBC Resources from J
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Configuring JMS Connection Factorie
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Defining Connection Pool Properties
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Obtaining JMS Connection Factories
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JMS and Transactions and its accomp
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JMS and Transactions For instance:
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Configuring JMS administered object
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Tibco Creating Clustered JMS Servic
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Sonic serverUrl String localhost:72
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Sonic Creating Clustered JMS Servic
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OpenJMS Even though OpenJMS can be
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OpenJMS Important If you use OpenJM
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OpenJMS openjms.clean_messages_on_s
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OpenJMS Table 24.1 Property Name De
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Other JMS providers The following a
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Creating the Interceptor Class For
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Creating the JAR file Creating the
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Components Components The Connector
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System Contracts Connection Managem
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System Contracts Security Managemen
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Common Client Interface (CCI) Conne
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Packaging and Deployment Figure 26.
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Resource Adapters Resource Adapters
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Connection management Connection ma
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Security management with the Securi
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Security management with the Securi
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Resource Adapter overview Note Reso
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Deployment Descriptors for the Reso
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Developing the Resource Adapter Con
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Deploying the Resource Adapter Pack
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Application development overview 8
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Application development overview //
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Application development overview
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Other Considerations Other Consider
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Other Considerations To illustrate,
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Other Considerations } } { cf = new
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General syntax and usage General sy
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Syntax and usage for iastool Table
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Syntax and usage for java2iiop Exam
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Syntax and usage for appclient Tabl
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Building and running the BES exampl
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Using the iastool command-line tool
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Executing iastool command-line tool
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element ■ ■ ■ element The
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element The Partition statistics ag
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element element The services eleme
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element element The archive elemen
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EJB Container-level Properties Tabl
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EJB Container-level Properties Tabl
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EJB Customization Properties: Deplo
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Complete Index of EJB Properties Co
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Complete Index of EJB Properties Ta
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Java Session Service (JSS) Properti
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Java Session Service (JSS) Properti
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Partition Transaction Service (Tran
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Borland-specific web DTD 33, 36 bra
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ejb.mdb.maxMessagesPerServerSession
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J J2EE VisiClient 97 VisiClient env
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optimistic concurrency 130 SelectFo
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Sonic clustered service 228 SonicMQ
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X XML DTD 99 VisiClient 98 grammar
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