Transaction processing system with decomposed architecture
An implementation may involve: receiving, by an application launcher, a message on behalf of a client device; determining a server application based on the message and metadata, wherein the server application is associated with a path, wherein the path includes a set of steps, wherein each of the set of steps is respectively associated with program logic to perform a discrete set of functions, wherein a generate result step causes the server application to determine an outcome of executing the path, and wherein a handle request step causes the server application to provide, to an external service, a representation of a request related to the outcome; providing, by the application launcher, a client application to the client device; and executing, by an orchestrator, the path, wherein a context of the execution is written in a database between execution of at least some of the set of steps.
1. A system comprising:
one or more processors; and
memory storing instructions that are executable by the one or more processors to perform operations of software components comprising:
a server application associated with a path, wherein the path includes a set of steps, wherein each of the set of steps is respectively associated with program logic to perform a discrete set of functions, wherein a generate result step of the set of steps causes the server application to determine an outcome of executing the path, and wherein a handle request step of the set of steps causes the server application to provide, to an external service, a representation of a request related to the outcome;
storage containing metadata that relate to the server application, an operator of the server application, or a user of the server application;
an application launcher configured to: receive a message on behalf of a client device, determine the server application based on the message and the metadata, and provide a client application to the client device, wherein the client application is configured to interact with the server application; and
an orchestrator configured to execute the path, wherein a context of the execution is written in a database between execution of at least some of the set of steps.
2. The system of claim 1 , the software components further comprising:
a web site configured to allow selection of the server application from a menu of server applications associated with the operator or with one or more other operators.
3. The system of claim 1 , wherein the path specifies that pre-step processing is to be performed prior to the generate result step, and wherein the pre-step processing comprises:
reading, from the database, at least part of the context;
determining, from the context as read, that an additional feature applies to the generate result step; and
performing the generate result step in accordance with the additional feature.
4. The system of claim 3 , wherein determining that the additional feature applies to the generate result step comprises:
determining that the context indicates that the user has engaged with the server application a threshold number of times.
5. The system of claim 3 , wherein the path specifies that post-step processing is to be performed after the handle request step, and wherein the post-step processing comprises:
reading, from the database, at least part of the context;
determining, from the context as read, that an additional modification of the context is to be applied after the handle request step; and
writing, to the context, an update based on the additional modification.
6. The system of claim 1 , wherein the path specifies that pre-step processing is to be performed prior to the generate result step, and wherein the pre-step processing comprises:
reading, from the database, at least part of the context;
determining, from the context as read, that a constraint applies to the handle request step; and
performing the handle request step in accordance with the constraint.
7. The system of claim 1 , wherein the constraint relates to an amount specified by the user as part of the handle request step.
8. The system of claim 1 , wherein the server application is a gaming application, and wherein the outcome is based on an iteration of the gaming application.
9. The system of claim 1 , wherein providing the client application to the client device is based on determining, by way of a geolocation service, that the client device is permitted to access the server application.
10. The system of claim 1 , wherein the client application is executable within a web browser of the client device.
11. The system of claim 1 , wherein the path indicates that: at least two of the set of steps can be performed in parallel to one another, and a pair of steps in the set of steps are to be performed serially.
12. The system of claim 1 , wherein the path defines a boundary separating the set of steps into a first group of steps and a second group of steps, wherein the first group of steps are configured to be performed before the second group of steps, wherein a failure that occurs during execution of the first group of steps causes the context to be rolled back and the path to be restarted, and wherein a further failure that occurs during execution of the second group of steps causes at least some of the second group of steps to be retried.
13. The system of claim 12 , wherein the boundary is between the handle request step and a further step that immediately follows either: the handle request step, or any post-processing step related to the handle request step.
14. The system of claim 1 , further comprising:
a plurality of orchestrators, each configured to execute paths, wherein the orchestrator is one of the plurality of orchestrators; and
a load balancer configured to distribute representations of the paths across the plurality of orchestrators according to a load balancing discipline.
15. The system of claim 1 , wherein a particular step of the set of steps is configured to interact with a particular external service of one or more external services, wherein a plurality of server components are configured to perform the particular external service, the system further comprising:
a load balancer configured to distribute interactions across the plurality of server components according to a load balancing discipline.
16. The system of claim 1 , wherein the application launcher is configured to facilitate loading of the server application in parallel to determining whether a user associated with the client device is permitted to access the server application.
17. The system of claim 1 , wherein the orchestrator and one or more external services invoked by the path are hosted within different virtual private cloud systems.
18. The system of claim 1 , wherein the context represents an intermediate or final state of the execution of the path.
19. The system of claim 1 , wherein the orchestrator receives a representation of the path from the application launcher.
20. A computer-implemented method comprising:
receiving, by an application launcher, a message on behalf of a client device;
determining a server application based on the message and metadata relating to the server application, an operator of the server application, or a user of the server application, wherein the server application is associated with a path, wherein the path includes a set of steps, wherein each of the set of steps is respectively associated with program logic to perform a discrete set of functions, wherein a generate result step of the set of steps causes the server application to determine an outcome of executing the path, and wherein a handle request step of the set of steps causes the server application to provide, to an external service, a representation of a request related to the outcome;
providing, by the application launcher, a client application to the client device, wherein the client application is configured to interact with the server application; and
executing, by an orchestrator, the path, wherein a context of the execution is written in a database between execution of at least some of the set of steps.