Oracle Java Cloud Service enables you to quickly deploy an enterprise-grade application server topology, with caching and load balancing.
The following diagram illustrates an Oracle Java Cloud Service instance that has an Oracle WebLogic Server cluster connected to an Oracle Database Cloud Service deployment. A load balancer receives requests from clients and forwards them to the WebLogic Server nodes.
In this example, the Oracle Java Cloud Service instance has a single Oracle WebLogic Server domain that contains an Administration Server and a cluster of two Managed Servers for hosting applications. The load balancer is a dual-node Oracle Traffic Director setup.
For information about the network protocols and default ports that can be used to access an Oracle Java Cloud Service instance, see Understanding the Default Access Ports. The HTTP port is disabled if you created the instance by using the instance-creation wizard in the web console.
When Oracle Coherence is enabled for a service instance, there is a second WebLogic Server cluster of Managed Servers for storing Coherence data. Both the WebLogic Server clusters are associated with the single Coherence cluster in the domain. For information about the deployment topology when Oracle Coherence is enabled for an Oracle Java Cloud Service instance, see About Oracle Coherence in Oracle Java Cloud Service.