Service-oriented architecture
In an example, there is disclosed a system and method for providing a service-oriented architecture, including request/response, over a publish/subscribe framework. In one embodiment, a system is disclosed for adding layers upon a publish/subscribe messaging framework for sophisticated messaging such as point-to-point (request/response) and the ability to query for available services, in a reliable, scalable manner.
1. One or more non-transitory computer-readable storage mediums having stored thereon executable instructions for providing a data exchange layer (DXL) broker, the executable instructions operable to instruct a processor to:
provide a DXL bus controller configured to provide a DXL fabric, wherein the DXL fabric is configured to provide a request-response framework on a publish-subscribe fabric;
communicatively couple to an enterprise service bus via the DXL bus controller;
receive a service registration message on the enterprise service bus;
determine that the service registration message is for an unregistered service;
create a new service registry record for the service; and
create an instance of the service in the service registry record.
2. The computer-readable medium of claim 1 , wherein the instructions are further operable to determine that the service registration message is for a registered service, and to create a new instance of the service in an existing service registry record.
3. The computer-readable medium of claim 1 , wherein the instructions are further operable to determine that a service has unregistered, and to remove an instance of the service from an existing service registry record.
4. The computer-readable medium of claim 1 , wherein the instructions are further operable to:
receive a service request message on the enterprise service bus; and
determine that the service request is directed to a service for which a service registry record exists, and forward the service request to a device providing the service.
5. The computer-readable medium of claim 1 , wherein the instructions are further operable to determine that the service request is directed to a service for which a service registry record does not exist, and to respond with a message that the service is unavailable.
6. The computer-readable medium of claim 1 , wherein the instructions are further operable to determine that a plurality of instances of the service are available, and to return a list of available instances.
7. The computer-readable medium of claim 1 , wherein the service registry record is configured to include an array of available instances of the service.
8. A data exchange layer (DXL) broker comprising:
a processor;
a network interface configured to communicatively couple the processor to a DXL enterprise service bus; and
a memory having stored thereon executable instructions operable to instruct the processor to:
provide a DXL bus controller configured to provide a DXL fabric, wherein the DXL fabric is configured to provide a request-response framework on a publish-subscribe fabric;
communicatively couple to an enterprise service bus via the DXL bus controller;
receive a service registration message on the enterprise service bus;
determine that the service registration message is for an unregistered service;
create a new service registry record for the service; and
create an instance of the service in the service registry record.
9. The DXL broker of claim 8 , wherein the instructions are further operable to determine that the service registration message is for a registered service, and to create a new instance of the service in an existing service registry record.
10. The DXL broker of claim 8 , wherein the instructions are further operable to determine that a service has unregistered, and to remove an instance of the service from an existing service registry record.
11. The DXL broker of claim 8 , wherein the instructions are further operable to:
receive a service request message on the enterprise service bus; and
determine that the service request is directed to a service for which a service registry record exists, and forward the service request to a device providing the service.
12. The DXL broker of claim 8 , wherein the instructions are further operable to determine that the service request is directed to a service for which a service registry record does not exist, and to respond with a message that the service is unavailable.
13. The DXL broker of claim 8 , wherein the instructions are further operable to determine that a plurality of instances of the service are available, and to return a list of available instances.
14. The DXL broker of claim 8 , wherein the service registry record is configured to include an array of available instances of the service.
15. A method of providing DXL broker services, comprising:
providing a DXL bus controller configured to provide a DXL fabric, wherein the DXL fabric is configured to provide a request-response framework on a publish-subscribe fabric;
communicatively couple to an enterprise service bus via the DXL bus controller;
receiving a service registration message on an enterprise service bus;
determining that the service registration message is for an unregistered service;
creating a new service registry record for the service; and
creating an instance of the service in the service registry record.
16. The method of claim 15 , further comprising determining that the service registration message is for a registered service, and to create a new instance of the service in an existing service registry record.
17. The method of claim 15 , further comprising determining that a service has unregistered, and removing an instance of the service from an existing service registry record.
18. The method of claim 15 , further comprising:
receiving a service request message on the enterprise service bus; and
determining that the service request is directed to a service for which a service registry record exists, and forwarding the service request to a device providing the service.
19. The method of claim 15 , further comprising determining that the service request is directed to a service for which a service registry record does not exist, and responding with a message that the service is unavailable.
20. The method of claim 15 , further comprising determining that a plurality of instances of the service are available, and returning a list of available instances.