What is XA datasource JBoss?

What is XA datasource JBoss?

An XA Datasource is needed to execute a distributed transaction. Generally, a distributed transaction spans 2 or more different datasources. An XA datasource is used instead of the datasource if the target Jboss application: Uses the Java Transaction API (JTA)

What is XA datasource class?

XA refers to the X/Open XA standard, which is a distributed transaction protocol, allowing ACID transactions to span across multiple resources which are XA compliant (this can include transactions across multiple databases of different RDBMS vendors, queues, transactional file systems, etc).

What is the default value for datasource connection pool size in JBoss EAP?

Pool Attributes. The min-pool-size attribute defines the minimum size of the connection pool. The default minimum is zero connections.

What is connection pool in JBoss?

When connecting to a data source, JBoss Enterprise Application Platform must allocate resources and de-allocate resources for every connection. Connection pooling reduces the cost of data source connections by creating a number (“pool”) of data source connections available to be shared by applications.

What is difference between XA and non XA datasource?

An XA transaction, in the most general terms, is a “global transaction” that may span multiple resources. A non-XA transaction always involves just one resource.

What is blocking timeout Millis?

The blocking-timeout-millis element indicates the maximum time in milliseconds to block while waiting for a connection before throwing an exception. Note that this blocks only while waiting for a permit for a connection, and will never throw an exception if creating a new connection takes an inordinately long time.

What is Min Pool Size?

The min-pool-size data source parameter defines the minimum size of the connection pool. The default minimum is zero connections, so if a minimum pool size is not specified, no connections will be created in the connection pool when the platform starts.

What happens when max pool size is reached?

This may have occurred because all pooled connections were in use and max pool size was reached. When you receive this message, it means that your website is using all of its available SQL Database connections (the default limit is 15 connections per DotNetNuke install).

What are the flush strategies in Jboss datasource connection pools?

A connection pool can be flushed by executing a flush command in the JBoss Management Command Line Interface (CLI).

  • Flushing Idle Connections. The following CLI command will flush all idle connections from a datasource pool named “ExampleDS”:
  • Flushing Invalid Connections.
  • Graceful Flush.
  • Flushing All Connections.

What is XA driver?

An XA driver can guarantee atomicity of updates across multiple participating resources. Two things are required: Configuration settings and application code. XA transaction support requires two configuration steps: Change the Connection Pool driver to use an XA Driver.

What is XA and non-XA in WebLogic?

An XA transaction involves a coordinating transaction manager, with one or more resources (databases\JMS) all involved in a single global transaction. Non-XA transactions have no transaction coordinator, and a single resource is doing all its transaction work itself (also called local transactions).

What is idle timeout minutes in datasource configuration?

idle-timeout-minutes The idle-timeout-minutes elements specifies the maximum time, in minutes, a connection may be idle before being closed.

How do non-Xa DataSource transactions work?

Non-XA transactions have no transaction coordinator, and a single resource is doing all its transaction work itself (this is sometimes called local transactions). jta=”true”, Transaction commit automatically. I was wondering about this myself (“use JTA” option in a non-XA Datasource) so I tested several configurations.

What is a transaction manager DataSource?

The Transaction Manager coordinates all of this through a protocol called Two Phase Commit (2PC). This protocol also has to be supported by the individual resources. In terms of datasources, an XA datasource is a data source that can participate in an XA global transaction.

How to use DataSource with JTA=false in EJB?

In practice, when you use the datasource with jta=false in a method of a transactional component (like an EJB), the datasource will not be enlisted in global transaction. That means all data changes are committed immediately. Although you can manually commit the datasource transaction by setting autocommit to false.

What is the difference between jbossts JTA and JBoss JTS JTS?

The JBossTS JTA module for local-only transactions and the JBossTS JTS module for distributed transactions. Both are capable to handle multiple XA resourcesbut JBoss JTS can handle distributed transactions spanning multiple VMs and JBossTS JTA can only handle transactions in a single VM.

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