## Name

Multicast — Routes a message to a number of endpoints

## Usage

The Multicast pattern shallow copies the original exchange and routes the copies to multiple endpoints, without modifying the message. Each endpoint gets a copy of the same message. If the route's exchange pattern is in-out, the Multicast pattern aggregates the responses into a single message.

The Multicast pattern can appear at any point in the body of a route. It must be followed by two or more destinations.

## Properties

Table 20 describes the properties you can specify using the properties editor.

Table 20. Multicast Properties

Name | Description
--- | ---
Inherit Error Handler | Specifies whether the node should use the error handler configured for the route. The default is `Disabled`.
Timeout | Specifies the amount of time, in milliseconds, the node will attempt to deliver a message before timing out.
Streaming | Specifies whether multicast operates in streaming mode. The default is `Disabled`.
On Prepare Ref | Specifies a reference to a bean implementing a custom `onPrepare` processor that processes the original message before it is passed to multiple destinations in the route. This property enables you to deep clone mutable message bodies, so each destination gets a separate copy of the entire exchange. You can use this property to execute any kind of logic on a message exchange.
Parallel Processing | Specifies whether the multicast messages are forwarded to multiple destinations concurrently. The default is `Disabled`.
Stop On Exception | Specifies whether the node will stop all processing if one of the endpoints receiving a message throws an exception. The default is `Disabled`.
Strategy Ref | Specifies a reference for looking up the `AggregationStrategy` in the registry.
Executor Service Ref | Specifies a reference for looking up the `executorService` to use for thread pool management.
Share Unit of Work | Specifies whether all of the resulting exchanges are considered a single shared unit of work. The default is `Disabled`.
Id | Specifies a unique identifier for the endpoint. The Id can be used to refer to the endpoint in the Camel XML file.
Description | Specifies a text description for the node. This description is included in the generated XML file, but it is informational only. It is not used by Apache Camel.