Methods, systems, and computer readable media for supporting circuit breaker design pattern at consumer network function (NF)
A method for error information propagation from an SCP to a NF to support a circuit breaker design at the consumer NF includes receiving, at the SCP and from the consumer NF, a first SBI service request message. The method further includes attempting, by the SCP, to forward the first SBI service request to N producer NF instances. The method further includes detecting, by the SCP, an error involving the N producer NF instances. The method further includes performing, by the SCP, successful alternate routing of the first SBI service request message to an (N+1) th producer NF instance. The method further includes receiving, by the SCP, a success response message from the (N+1) th producer NF instance. The method further includes propagating, by the SCP, with the success response message and to the consumer NF, error information regarding the N producer NF instances.
1. A method for error information propagation from a service communication proxy (SCP) to a consumer network function (NF) to support a circuit breaker design at the consumer NF, the method comprising:
receiving, at the SCP and from the consumer NF, a first service based interface (SBI) service request message;
attempting, by the SCP, to forward the first SBI service request to N producer NF instances, N being an integer of at least one;
detecting, by the SCP, an error involving the N producer NF instances;
performing, by the SCP, successful alternate routing of the first SBI service request message to an (N+1) th producer NF instance;
receiving, by the SCP, a success response message from the (N+1) th producer NF instance; and
propagating, by the SCP, with the success response message and to the consumer NF, error information regarding the N producer NF instances.
2. The method of claim 1 , wherein the first SBI service request comprises a subsequent SBI request including a 3gpp-Sbi-Target-apiRoot header identifying one of the N producer NF instances and a routing binding indication identifying an NF set of which the N and (N+1) th producer NF instances are members.
3. The method of claim 2 , wherein performing alternate routing of the first SBI request includes selecting the (N+1) th producer NF instance from the NF set.
4. The method of claim 1 , wherein detecting an error involving the N producer NF instances includes receiving an error response from at least one of the N producer NF instances.
5. The method of claim 1 , wherein detecting an error regarding the N producer NF instances includes detecting a response timeout at the SCP for at least one of the N producer NF instances.
6. The method of claim 1 , wherein propagating the error information with the success response message includes adding a custom header including the error information to the success response message.
7. The method of claim 1 , wherein the error information includes information identifying each of the N producer NF instances.
8. The method of claim 1 , wherein the error information includes a hypertext transfer protocol (HTTP) status code generated by at least one of the N producer NF instances and transmitted to the SCP in response to the first SBI request message.
9. The method of claim 1 , comprising using, by the consumer NF, the error information to implement the circuit breaker design pattern.
10. The method of claim 9 , wherein using the error information to implement the circuit breaker design pattern includes selecting, in a manner that excludes each of the N producer NF instances, the (N+1) th producer NF instance as a target for a second SBI service request, generating the second SBI service request including a 3gpp-Sbi-Target-apiRoot header identifying the (N+1) th producer NF instance, and transmitting the second SBI service request to the SCP.
11. A system for error information propagation from a service communication proxy (SCP) to a consumer network function (NF) to support a circuit breaker design at the consumer NF, the system comprising:
an SCP including at least one processor; and
an error detector/propagator implemented by the at least one processor for receiving, from the consumer NF, a first service based interface (SBI) service request message, attempting, by the SCP, to forward the first SBI service request to N producer NF instances, N being an integer at least one, detecting an error involving the N producer NF instances, performing successful alternate routing of the first SBI service request message to an (N+1) th producer NF instance, receiving a success response message from the (N+1) th producer NF instance, and propagating, with the success response message and to the consumer NF, error information regarding the N producer NF instances.
12. The system of claim 11 , wherein the first SBI service request comprises a subsequent SBI request including a 3gpp-Sbi-Target-apiRoot header identifying one of the N producer NF instances and a routing binding indication identifying an NF set of which the N and (N+1) th producer NF instances are members.
13. The system of claim 12 , wherein the error detector/propagator is configured to perform alternate routing of the first SBI request by selecting the (N+1) th producer NF instance from the NF set.
14. The system of claim 11 , wherein the error detector/propagator is configured to detect the error involving the N producer NF instances by receiving an error response from at least one of the N producer NF instances.
15. The system of claim 11 , wherein the error detector/propagator is configured to detect the error involving the N producer NF instances by detecting a response timeout at the SCP for at least one of the N producer NF instances.
16. The system of claim 11 , wherein the error detector/propagator is configured to propagate the error information with the success response message by adding a custom header including the error information to the success response message.
17. The system of claim 11 , wherein the error information includes information identifying each of the N producer NF instances.
18. The system of claim 11 , wherein the error information includes a hypertext transfer protocol (HTTP) status code generated by at least one of the N producer NF instances and transmitted to the SCP in response to the first SBI request message.
19. The system of claim 11 , wherein the error information is usable by the consumer NF to implement the circuit breaker design pattern.
20. A non-transitory computer readable medium having stored thereon executable instructions that when executed by a processor of a computer control the computer to perform steps comprising:
receiving, at a service communication proxy (SCP) and from a consumer network function (NF), a first service based interface (SBI) service request message;
attempting, by the SCP, to forward the first SBI service request to N producer NF instances, N being an integer of at least one;
detecting, by the SCP, an error involving the N producer NF instances;
performing, by the SCP, successful alternate routing of the first SBI service request message to an (N+1) th producer NF instance;
receiving, by the SCP, a success response message from the (N+1) th producer NF instance; and
propagating, by the SCP, with the success response message and to the consumer NF, error information regarding the N producer NF instances.