Generating an idempotent workflow

1. A method, comprising:

identifying a boundary function that executes at least a first portion of distributed code on a first computing device and at least a second portion of the distributed code on a second computing device different from the first computing device;

separating the boundary function into a plurality of sub-functions based, at least in part, on operating characteristics corresponding to each of the plurality of sub-functions, wherein a first sub-function of the plurality of sub-functions generated from the boundary function has a first operating characteristic and a second sub-function of the plurality of sub-functions generated from the boundary function has a second operating characteristic different from the first operating characteristic;

transforming the first sub-function of the plurality of sub-functions having the first operating characteristic to have the second operating characteristic different from the first operating characteristic to produce a single output value from multiple executions of the first sub-function of the plurality of sub-functions by storing a flag indicating whether the first sub-function of the plurality of sub-functions has been executed;

including code in the first sub-function of the plurality of sub-functions to enable the first sub-function of the plurality of sub-functions to execute only once; and

combining the plurality of sub-functions to form a workflow having the second operating characteristic based, at least in part, on the flag.

2. The method of claim 1 ,

wherein the first sub-function has a non-idempotent operating characteristic; and

wherein the second sub-function has an idempotent operating characteristic.

3. The method of claim 2 ,

wherein the plurality of sub-functions comprises a transition function that identifies a transition from the first computing device to the second computing device and a reversion function that terminates a session on the first computing device or the second computing device.

4. The method of claim 1 , further comprising:

storing the plurality of sub-functions in a persistent workflow database.

5. The method of claim 4 , further comprising:

storing an input array corresponding to the plurality of sub-functions in the persistent workflow database.

6. The method of claim 4 , further comprising:

generating an error code based on generating an error during execution of any of the plurality of sub-functions; and

storing the error code in the persistent workflow database.

7. The method of claim 4 , further comprising:

calculating a number of instructions in any of the plurality of sub-functions; and

storing the number of instructions in the persistent workflow database.

8. The method of claim 1 , further comprising:

returning an output value from a previous execution of any of the plurality of sub-functions based, at least in part, on a second flag indicating that any of the plurality of sub-functions have previously executed.

9. One or more computer-readable storage media to generate a workflow comprising a plurality of instructions that, when executed by a processor, cause the processor to:

identify a boundary function that executes at least a first portion of distributed code on a first computing device and at least a second portion of the distributed code on a second computing device different from the first computing device;

separate the boundary function into a plurality of sub-functions based, at least in part, on operating characteristics corresponding to each of the plurality of sub-functions, wherein a first sub-function of the plurality of sub-functions generated from the boundary function has a first operating characteristic and a second sub-function of the plurality of sub-functions generated from the boundary function has a second operating characteristic different from the first operating characteristic, wherein the plurality of sub-functions comprises a transition function that identifies a transition from the first computing device to the second computing device and a reversion function that terminates a session;

transform the first sub-function of the plurality of sub-functions having the first operating characteristic to have the second operating characteristic different from the first operating characteristic to produce a single output value from multiple executions of the first sub-function of the plurality of sub-functions by storing a flag indicating whether the first sub-function of the plurality of sub-functions has been executed; and

combine the plurality of sub-functions to form a workflow having the second operating characteristic based, at least in part, on the flag.

10. The one or more computer-readable storage media of claim 9 , wherein the instructions cause the processor to include in the first sub-function of the plurality of sub-functions to enable the first sub-function of the plurality of sub-functions to execute only once.

11. The one or more computer-readable storage media of claim 9 , wherein the instructions cause the processor to store the plurality of sub-functions in a persistent workflow database.

12. The one or more computer-readable storage media of claim 11 , wherein the instructions cause the processor to store an input array corresponding to the plurality of sub-functions in the persistent workflow database.

13. The one or more computer-readable storage media of claim 11 , wherein the instructions cause the processor to:

generate an error code based on generating an error during execution of any of the plurality of sub-functions; and

store the error code in the persistent workflow database.

14. The one or more computer-readable storage media of claim 11 , wherein the instructions cause the processor to:

return an output value from a previous execution of any of the plurality of sub-functions based, at least in part, on a second flag indicating that any of the plurality of sub-functions have previously executed.

15. A system for generating a workflow, comprising:

one or more storage devices to store executable code; and

one or more processing devices to execute the executable code to:

identify a boundary function that executes at least a first portion of distributed code on a first computing device and at least a second portion of the distributed code on a second computing device different from the first computing device;

separate the boundary function into a plurality of sub-functions based, at least in part, on operating characteristics corresponding to each of the plurality of sub-functions, wherein a first sub-function of the plurality of sub-functions generated from the boundary function has a first operating characteristic and a second sub-function of the plurality of sub-functions generated from the boundary function has a second operating characteristic different from the first operating characteristic;

transform the first sub-function of the plurality of sub-functions having the first operating characteristic to have the second operating characteristic different from the first operating characteristic to produce a single output value from multiple executions of the first sub-function of the plurality of sub-functions by storing a flag indicating whether the first sub-function of the plurality of sub-functions has been executed;

include code in the first sub-function of the plurality of sub-functions to enable the first sub-function of the plurality of sub-functions to execute only once; and

combine the plurality of sub-functions to form a workflow having the second operating characteristic based, at least in part, on the flag.

16. The system of claim 15 , wherein the plurality of sub-functions comprises a transition function that identifies a transition from the first computing device to the second computing device and a reversion function that terminates a session.

17. The system of claim 15 , wherein the one or more processing devices execute the executable code further to store the plurality of sub-functions in a persistent workflow database.