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D.2. Camel endpoint discovery

When deploying Camel endpoints in a cloud, it is often useful to enable location transparency for some Camel endpoints. In a dynamic cloud environment, where server machines are frequently shut down and restarted in a different location, you might want to have the capability to reconnect routes across different hosts. This kind of location transparency and reconnection functionality is supported by two special URI prefixes, which integrate Camel endpoints with the Fabric discovery mechanism:
fabric:
The fabric: prefix provides location transparency and load-balancing functionality for Camel endpoints. A consumer endpoint (acting like a server port), defines its endpoint URI using the following syntax: 
fabric:ClusterID:EndpointURI
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So that the Camel endpoint URI, EndpointURI, is stored in the Fabric registry under the cluster ID, ClusterID. Producer endpoints (acting like clients) can then access the Camel endpoint by specifying just the ClusterID, as follows: 
fabric:ClusterID
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Fabric then resolves the cluster ID to the registered endpoint URI. If multiple endpoint URIs are registered under the same cluster ID, Fabric randomly selects one of the available URIs, thus providing load-balancing functionality.
master:
The master: prefix provides failover functionality for Camel endpoints. Two or more consumer endpoints (server ports) must register their URIs with the Fabric registry, using the following syntax: 
master:ClusterID:EndpointURI
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Producer endpoints (acting like clients) can then access the failover cluster by defining a URI with the following syntax: 
master:ClusterID
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Initially, Fabric chooses one of the consumer endpoints to be the master instance and always resolves the client URIs to this master location. If the master fails, however, Fabric will fail over to one of the other registered endpoint URIs and start resolving to that endpoint instead.
For more details, see chapter "Master Component" in "Apache Camel Component Reference".
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