Oracle Developers Guide for Microsoft Transaction Server

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Service port is configured automatically if option not specified. Configuration is not required on the Windows computer if a Microsoft Transaction Server is installed on a computer. To configure the Microsoft Transaction Server, perform the following tasks on the computer where the Oracle Database is installed: 1. Run the oramtsadmin. Schedule automatic transaction recovery.

Microsoft Transaction Server Top # 8 Facts

If you have an Oracle Fail Safe configuration, modify the registry values before or after running the oramtsadmin. The recovery service reports transaction outcome to the DBMS job process.

Programming with Microsoft Transaction Server and an Oracle Database

The DBMS recovery job commits or terminates the in-doubt transaction. A database job for in-doubt transactions must be scheduled for each database participating in Microsoft Transaction Server transactions. Transaction recovery is configured by running the oramtsadmin. The oramtsadmin. Automatically schedules database jobs for transaction recovery every one minute. When the database job is run, it checks for unresolved global transactions in the database that are related to Microsoft Transaction Server.

Information in the transaction identifiers XIDs of the in-doubt transactions identifies the computer on which the transaction was started. Schedules post-recovery cleanup every half hour. To set and start up job-queue processes: 1. Go to the computer on which the Oracle Database is installed. Set this parameter to a value greater than 1 if there are many destinations to which to propagate the messages. The Microsoft Transaction Server transaction recovery jobs run under the administrator user account. Log on to the computer where the Oracle Database is installed.

You can accept the default username of mtssys and password of mtssys, or change them. When the job is run, it checks for unresolved global transactions in the database that are related to Microsoft Transaction Server. Information in the XIDs of the in-doubt transactions identifies the computer on which the transaction started. This procedure is run by the post-recovery cleanup job. This view consists of the following columns: Formatid This is the formatid of the global transaction in the database. A single Microsoft Transaction Server transaction can have multiple Oracle global transactions.

All these transactions have the small global transaction identifier, but different branch identifiers. This column shows the identifier corresponding to this local transaction.

Microsoft Transaction Server Application Development

For HTTP connections, this translates to a hostname and port number. Enter the following command: This ensures that the required information for transaction recovery is available to the Oracle-Microsoft Transaction Server integration layer. In configurations where the Microsoft Transaction Server application is part of a Windows cluster for example, the application can fail over to another node or host in the cluster , the MS DTC runs as a cluster-wide resource.

If you have an Oracle Fail Safe configuration, make sure the following registry information is replicated on all nodes in the cluster participating in Microsoft Transaction Server transactions: To modify registry values for Oracle Fail Safe configurations: 1. Copy the registry information appearing here to all nodes in the cluster. Reboot the computer on which you added the key. When a client computer starts a business method on a transactional component, Microsoft Transaction Server begins a transaction coordinated by the MS DTC.

Figure illustrates this transactional model. In response to client requests, the application server invokes the COM components. The invocations are performed within the scope of transactions where required Transactional Application Logic COM Components Three primary responsibilities: Embed the business logic. If a component is transactional, Microsoft Transaction Server starts a transaction for every method invocation on that component.

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Log in Registration. Search for. Size: px. Start display at page:. Evangeline Osborne 1 years ago Views:. View more. Similar documents. Security is maintained More information. Oracle Cloud. Creating a Business Intelligence Cloud Extract Siebel Installation Guide for Microsoft Windows. Siebel Innovation Pack Version 8. This software and More information. Oracle Fusion Middleware.

This software and related documentation More information. Oracle and Java are registered trademarks of Oracle More information. Oracle WebCenter Sites. Backup and Recovery Guide 11g Release 1 More information. Figure illustrates this transactional model. In response to client requests, the application server invokes the COM components. The invocations are performed within the scope of transactions where required.

Embed the business logic. If a component is transactional, Microsoft Transaction Server starts a transaction for every method invocation on that component. Decide the outcome of the operation by notifying Microsoft Transaction Server of its decision to commit or terminate the changes to all RMs. Starts an Oracle global transaction corresponding to the Microsoft Transaction Server transaction of which the component is a part.

This job extracts the recovery service's endpoint address in the in-doubt transaction's XID and then requests the outcome of the Microsoft DTC transaction from the recovery service. Ultimately, the job will commit or terminate the in-doubt transaction when it receives the transaction's outcome. Monitors transactions that require recovery. This is the database on which the client transaction request is performed. OCI connection pooling is used to coordinate a transaction in nearly all application programming interfaces.

This sections describes how transactions are registered and how OCI connection pooling coordinates them. Application components that run in the Microsoft Transaction Server environment are created as dynamic link libraries DLLs. Requires a Transaction The component must run in a transaction.

Application Development

If the transaction does not currently exist, Microsoft Transaction Server automatically creates a new transaction for each method invocation on the component. Supports a Transaction The component can run within the client's transaction. When a new component is created, its context inherits the transaction from the context of the invoking client. If the client does not have a transaction, the new context is also created without one. Requires a New Transaction The component must run within its own transaction.

Microsoft Transaction Server automatically creates a new transaction for each method invocation on the component. Does Not Support Transactions The component does not run within a transaction. Each method invocation on the component is performed without a surrounding transaction, regardless of whether the invoking client includes a transaction.

How you register an application component determines if it runs in a Microsoft Transaction Server-coordinated transaction. If the application component runs in a Microsoft Transaction Server-coordinated transaction, the OCI connection pooling is always used and Microsoft Transaction Server and its MS DTC component coordinate the creation, startup, management, and commitment phases of the transaction. Microsoft Transaction Server ensures that all changes made by the component are committed if the transaction succeeds, or are terminated if the transaction fails.

If the application component does not run in a Microsoft Transaction Server-coordinated transaction, the component runs in a Microsoft Transaction Server environment, but the databases that it accesses may or may not take part in MS DTC-coordinated transactions. If the transaction is not MS DTC-coordinated, the client application must create, start, manage, and commit the transaction. Calls SetComplete to commit database operations or SetAbort to terminate database operations on the Microsoft Transaction Server context object associated with the component.

MS DTC performs the two-phase commit protocol to prepare and commit or to terminate the transaction. This notifies the OCI connection pooling component and ends the transaction. OCI connection pooling is notified and performs the necessary steps to complete phase one, the prepare phase, and phase two, the commit or terminate phase. The connection protocol follows one of the following scenarios:. The only change in code you must make involves obtaining and releasing the OCI service context handle.

Include the oramts. Using OraMTSSvcGet enables you to receive connection pooling and implicit transaction support if you registered the application component to run in a Microsoft Transaction Server transaction. This initializes the OCI process environment. There are several scenarios for integrating COM components. This is a native data provider for the Microsoft.

Working with Different Types of Connection Pooling

NET framework. It also traces the results of the calls sent back from the ODP. NET to the application. An ODP. In order to see any processing effects of the ODP. NET and the raw SQL statements that are being passed, you would need to look at a trace performed at a lower layer.


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  • It is recommended that ODP. NET 10g version NET, for example: 1. NET version NOTE: To reduce the amount of trace information taken, please see the following reference which goes into more detail on the values these parameters can be set to: Oracle Data Provider for. Net and generate the error. Net internal error or b an exception with the message "System. NullReferenceException: Object reference not set to an instance of an object" Please consider taking additional mini-dumps to help further trouble-shoot the problem by referencing the following note: Note TRC Tracing is now turned on.

    NOTE: To reduce the amount of trace information taken, please see the following reference which goes into more detail on the values these parameters can be set to: Oracle Services for Microsoft Transaction Server Developer's Guide Release 9. It is recommended that you move the existing trace files into a backup folder such that this folder remains empty to easily identify new trace files that may be generated by the Oracle MTS Recovery Service while tracing the ORAMTS.

    DLL steps above. DLL when uploading to support.

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    Therefore, the following two sections explain how to trace each piece in this architecture. Modify or create the following registry keys with these values to maximize the amount of trace information that will be logged. NOTE: To reduce the amount of trace information taken, please see the following reference which goes into more detail on the values these parameters can be set to: Using Microsoft Transaction Server with Oracle8i Chapter 7 - Troubleshooting Section - Using Trace File 2 Immediately run the application that enlists in a distributed transaction with the Microsoft Transaction Server MTS.