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# Messaging Bridge: Configuration: Transactions

Configuration Options Related Tasks Related Topics

A messaging bridge instance provides transaction semantics when the QOS is Exactly-once. This envelops a received message and sends it within a user transaction (XA/JTA).

Use this page to define the transaction configuration for this messaging bridge instance.

#### Configuration Options

Name | Description
--- | ---
Transaction Timeout | The amount of time, in seconds, that the transaction manager waits for each transaction before timing it out. Transaction timeouts are used when the QOS (quality of service) for a messaging bridge instance requires transactions. If a bridge is configured with Exactly-once QOS, the receiving and sending is completed in one transaction. MBean Attribute: `MessagingBridgeMBean.TransactionTimeout` Minimum value: `0` Maximum value: `2147483647`
Batch Size | The number of messages that are processed within one transaction. `Batch Size` only applies to a messaging bridge instance forwarding messages in synchronous mode and has a QOS (quality of service) that requires two-phase transactions. MBean Attribute: `MessagingBridgeMBean.BatchSize` Minimum value: `0`
Batch Interval | The maximum amount of time, in milliseconds, that a messaging bridge instance waits before sending a batch of messages in one transaction, regardless of whether the `Batch Size` has been reached or not. Only applies to a messaging bridge instance forwarding messages in synchronous mode and has a QOS (quality of service) that requires two-phase transactions. The default value of `-1` indicates that the bridge instance waits until the number of messages reaches the `Batch Size` before it completes a transaction. MBean Attribute: `MessagingBridgeMBean.BatchInterval`

Related Tasks

- Configure transaction properties
- Target messaging bridges to servers

Related Topics

- Understanding the Messaging Bridge
- Designing a Messaging Bridge