Examples of com.nokia.dempsy.router.Router

com.nokia.dempsy.router.Router

This class implements the routing for all messages leaving a node. Please note: This object is meant to be instantiated and manipulated by the {@link Dempsy} orchestrator and not used directly. However, it is important to understand how routing within Dempsy works.

Routing a message to a message processor happens in three stages. Given an {@link ApplicationDefinition} that contains many message processor clusters, messages leaving any one {@link Node} need to be routed to the appropriate message processorsin other clusters. The stages are as follows:

Using the message's type information (and {@link ClusterDefinition} if "destinations"are set) determine the cluster that contains the message processor that the message needs to be sent to.

Within the cluster determine the {@link Node} currently responsible for processing thatmessage using the messages key ( {@link MessageKey}) and the current {@link RoutingStrategy}for that cluster.

Once the message is sent to the appropriate {@link Node} the {@link MpContainer}is responsible for routing the message to the appropriate {@link MessageProcessor}

As mentioned, if the particular cluster that the node that this Router is instantiated in has explicitly defined destinations, then the message routing will be limited to only those destinations.

A router requires a non-null ApplicationDefinition during construction.

                  DempsyExecutor executor = (DempsyExecutor)clusterDefinition.getExecutor(); // this can be null
                  if (executor != null)
                     executor.start();
                  ClusterInfoSession clusterSession = clusterSessionFactory.createSession();
                  ClusterId currentClusterId = clusterDefinition.getClusterId();
                  router = new Router(clusterDefinition.getParentApplicationDefinition());
                  router.setCurrentCluster(currentClusterId);
                  router.setClusterSession(clusterSession);
                  // get the executor if one is set
                  
                  container = new MpContainer(currentClusterId);

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Examples of com.nokia.dempsy.router.Router

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