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# Messaging Bridge: Configuration: General

Configuration Options Related Tasks Related Topics

A messaging bridge instance transfers messages between two messaging providers. The providers may be another implementation of WebLogic JMS or a 3rd-party JMS messaging provider.

Use this page to configure the general settings for this messaging bridge instance to interoperate between messaging providers.

#### Configuration Options

Name | Description
--- | ---
Name | The name of this messaging bridge.
Source Bridge Destination | The source destination from which this messaging bridge instance reads messages. MBean Attribute: `MessagingBridgeMBean.SourceDestination` Changes take effect after you redeploy the module or restart the server.
Target Bridge Destination | The target destination where a messaging bridge instance sends the messages it receives from the source destination. MBean Attribute: `MessagingBridgeMBean.TargetDestination` Changes take effect after you redeploy the module or restart the server.
Selector | The filter for messages that are sent across the messaging bridge instance. Only messages that match the selection criteria are sent across the messaging bridge: For queues, messages that do not match the selection criteria are left behind and accumulate in the queue. For topics, messages that do not match the connection criteria are dropped. MBean Attribute: `MessagingBridgeMBean.Selector` Changes take effect after you redeploy the module or restart the server.
Quality Of Service | The QOS (quality of service) for this messaging bridge instance. `Exactly-once`: Each message in the source destination is transferred to the target exactly once. This is the highest QOS a messaging bridge instance can offer. `Atmost-once`: Each message in the source is transferred to the target only once with the possibility of being lost during the forwarding. `Duplicate-okay`: Messages in the source destination are transferred to the target (none are lost) but some may appear in the target more than once. MBean Attribute: `MessagingBridgeMBean.QualityOfService` Secure value: `Exactly-once` Changes take effect after you redeploy the module or restart the server.
QOS Degradation Allowed | Specifies if this messaging bridge instance allows the degradation of its QOS (quality of service) when the configured QOS is not available. When enabled, the messaging bridge instance degrades the QOS when the configured QOS is not available. If the QOS is degraded, a log message is delivered to the WebLogic startup window or log file. When not enabled, if messaging bridge instance cannot satisfy the quality of service requested, an error results and the messaging bridge instance does not start. MBean Attribute: `MessagingBridgeMBean.QOSDegradationAllowed` Changes take effect after you redeploy the module or restart the server.
Maximum Idle Time | The maximum amount of time, in seconds, that a messaging bridge instance remains idle. In asynchronous mode, this is the longest amount of time a messaging bridge instance stays idle before it checks the sanity of its connection to the source. In synchronous mode, this is the amount of time the messaging bridge can block on a receive call if no transaction is involved. MBean Attribute: `MessagingBridgeMBean.IdleTimeMaximum` Minimum value: `0` Maximum value: `2147483647`
Asynchronous Mode Enabled | Specifies if a messaging bridge instance forwards in asynchronous messaging mode. AsyncEnabled only applies to messaging bridge instances whose source destination supports asynchronous receiving. Messaging bridges instances that forward in asynchronous mode are driven by the source destination. A messaging bridge instance listens for messages and forwards them as they arrive. When `AsyncEnabled` is not selected, a bridge instance is forced to work in synchronous mode, even if the source supports asynchronous receiving. Note: For a messaging bridge instance with a QOS of Exactly-once to work in asynchronous mode, the source destination has to support the `MDBTransaction` interface. Otherwise, the bridge automatically switches to synchronous mode if it detects that `MDBTransaction` is not supported by the source destination. MBean Attribute: `MessagingBridgeMBean.AsyncEnabled` Changes take effect after you redeploy the module or restart the server.
Durability Enabled | Specifies whether or not the messaging bridge allows durable messages. When enabled and the source destination is a JMS topic, a messaging bridge instance uses a durable subscription to ensure that no messages are lost in the event of a failure. `DurabilityEnabled` ignored if the source destination is a JMS queue. When enabled and the source destination uses durable subscriptions, the source JMS implementation saves messages that are sent when a messaging bridge instance is not running. When the bridge instance is restarted, these messages are forwarded to the target destination. The administrator can choose not to be durable. When not enabled, messages that are sent to the source JMS implementation while the bridge instance is down cannot be forwarded to the target destination. MBean Attribute: `MessagingBridgeMBean.DurabilityEnabled` Changes take effect after you redeploy the module or restart the server.
Started | Specifies the initial operating state of a targetted messaging bridge instance. If enabled, the messaging bridge instance forwards messages (running). If not enabled, the messaging bridge instance does not forward messages (temporarily stopped). After a messaging bridge has started forwarding messages (running), use `Started` to temporarily suspend an active messaging bridge instance or restart an stopped messaging bridge instance. Select the `Started` checkbox to start a messaging bridge instance that has been temporarily stopped. Clear the `Started` checkbox to temporarily stop a messaging bridge instance that was running. This value does not indicate the run-time state of a messaging bridge instance. MBean Attribute: `MessagingBridgeMBean.Started`
Preserve Msg Property | Specifies if message properties are preserved when messages are forwarded by a bridge instance. If the target bridge destination is on wls 9.0 or higher, the following message properties are preserved: `message ID` `message timestamp` `user ID` `delivery mode` `priority` `expiration time` `redelivery limit` `unit of order name` If the target bridge destination is on wls between 6.0 and 8.1 or on a foreign JMS server, the following message properties are preserved: `delivery mode` `priority` `expiration time` If the target bridge destination is on wls 5.1 or older, no properties are preserved. MBean Attribute: `MessagingBridgeMBean.PreserveMsgProperty`

Related Tasks

- Configure messaging bridge instances
- Target messaging bridges to servers

Related Topics

- Understanding the Messaging Bridge
- Designing a Messaging Bridge