[5.1] Remote: Postpone the block waiting in afterCommand to BlockWaitingModule
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…Module` When implementing async upload, we introduced a block waiting behaviour in `RemoteModule#afterCommand` so that uploads happened in the background can be waited before the whole build complete. However, there are other block waiting code in other module's `afterCommand` method (e.g. BES module). Block waiting in remote module will prevent other modules' `afterCommand` from executing until it's completed. This causes issues like bazelbuild#14576. This PR adds a new module `BlockWaitingModule` whose sole purpose is to accept tasks submitted by other modules in `afterCommand` and block waiting all the tasks in its own `afterCommand` method. So those tasks can be executed in parallel. This PR only updates RemoteModule's `afterCommand` method to submit block waiting task. Other modules should be updated to use `BlockWaitingModule` as well but that's beyond the scope this this PR. This PR along with 73a76a8 fix bazelbuild#14576. Closes bazelbuild#14618. PiperOrigin-RevId: 424295121 (cherry picked from commit 621649d)
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afterCommand to BlockWaitingModuleafterCommand to BlockWaitingModule
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When implementing async upload, we introduced a block waiting behaviour in
RemoteModule#afterCommandso that uploads happened in the background can be waited before the whole build complete.However, there are other block waiting code in other module's
afterCommandmethod (e.g. BES module). Block waiting in remote module will prevent other modules'afterCommandfrom executing until it's completed. This causes issues like #14576.This PR adds a new module
BlockWaitingModulewhose sole purpose is to accept tasks submitted by other modules inafterCommandand block waiting all the tasks in its ownafterCommandmethod. So those tasks can be executed in parallel.This PR only updates RemoteModule's
afterCommandmethod to submit block waiting task. Other modules should be updated to useBlockWaitingModuleas well but that's beyond the scope this this PR.This PR along with 73a76a8 fix #14576.
(cherry picked from commit 621649d)
Closes #14703.