public async Task UpdatePrimaryWorkspaceAsync(Checksum solutionChecksum, CancellationToken cancellationToken)
{
var currentSolution = s_primaryWorkspace.CurrentSolution;
var primarySolutionChecksum = await currentSolution.State.GetChecksumAsync(cancellationToken).ConfigureAwait(false);
if (primarySolutionChecksum == solutionChecksum)
{
// nothing changed
return;
}
using (await s_gate.DisposableWaitAsync(cancellationToken).ConfigureAwait(false))
{
var updater = new SolutionCreator(_assetService, currentSolution, cancellationToken);
if (await updater.IsIncrementalUpdateAsync(solutionChecksum).ConfigureAwait(false))
{
// solution has updated
s_primaryWorkspace.UpdateSolution(await updater.CreateSolutionAsync(solutionChecksum).ConfigureAwait(false));
return;
}
// new solution. bulk sync all asset for the solution
await _assetService.SynchronizeSolutionAssetsAsync(solutionChecksum, cancellationToken).ConfigureAwait(false);
s_primaryWorkspace.ClearSolution();
s_primaryWorkspace.AddSolution(await updater.CreateSolutionInfoAsync(solutionChecksum).ConfigureAwait(false));
}
}
/// <summary>
/// SolutionService is designed to be stateless. if someone asks a solution (through solution checksum),
/// it will create one and return the solution. the engine takes care of synching required data and creating a solution
/// correspoing to the given checksum.
///
/// but doing that from scratch all the time wil be expansive in terms of synching data, compilation being cached, file being parsed
/// and etc. so even if the service itself is stateless, internally it has several caches to improve perf of various parts.
///
/// first, it holds onto last solution got built. this will take care of common cases where multiple services running off same solution.
/// second, it uses assets cache to hold onto data just synched (within 3 min) so that if it requires to build new solution,
/// it can save some time to re-sync data which might just used by other solution.
/// third, it holds onto solution from primary branch from Host. and it will try to see whether it can build new solution off the
/// primary solution it is holding onto. this will make many solution level cache to be re-used.
///
/// the primary solution can be updated in 2 ways.
/// first, host will keep track of primary solution changes in host, and call OOP to synch to latest time to time.
/// second, engine keeps track of whether a certain request is for primary solution or not, and if it is,
/// it let that request to update primary solution cache to latest.
///
/// these 2 are complimentary to each other. #1 makes OOP's primary solution to be ready for next call (push), #2 makes OOP's primary
/// solution be not stale as much as possible. (pull)
/// </summary>
private async Task <Solution> CreateSolution_NoLockAsync(Checksum solutionChecksum, bool fromPrimaryBranch, Solution baseSolution, CancellationToken cancellationToken)
{
var updater = new SolutionCreator(_assetService, baseSolution, cancellationToken);
// check whether solution is update to the given base solution
if (await updater.IsIncrementalUpdateAsync(solutionChecksum).ConfigureAwait(false))
{
// create updated solution off the baseSolution
var solution = await updater.CreateSolutionAsync(solutionChecksum).ConfigureAwait(false);
if (fromPrimaryBranch)
{
// if the solutionChecksum is for primary branch, update primary workspace cache with the solution
PrimaryWorkspace.UpdateSolution(solution);
return(PrimaryWorkspace.CurrentSolution);
}
// otherwise, just return the solution
return(solution);
}
// we need new solution. bulk sync all asset for the solution first.
await _assetService.SynchronizeSolutionAssetsAsync(solutionChecksum, cancellationToken).ConfigureAwait(false);
// get new solution info
var solutionInfo = await updater.CreateSolutionInfoAsync(solutionChecksum).ConfigureAwait(false);
if (fromPrimaryBranch)
{
// if the solutionChecksum is for primary branch, update primary workspace cache with new solution
PrimaryWorkspace.ClearSolution();
PrimaryWorkspace.AddSolution(solutionInfo);
return(PrimaryWorkspace.CurrentSolution);
}
// otherwise, just return new solution
var workspace = new TemporaryWorkspace(await updater.CreateSolutionInfoAsync(solutionChecksum).ConfigureAwait(false));
return(workspace.CurrentSolution);
}
private async Task <Solution> CreateSolution_NoLockAsync(Checksum solutionChecksum, Solution baseSolution, CancellationToken cancellationToken)
{
var updater = new SolutionCreator(_assetService, baseSolution, cancellationToken);
if (await updater.IsIncrementalUpdateAsync(solutionChecksum).ConfigureAwait(false))
{
// solution has updated
return(await updater.CreateSolutionAsync(solutionChecksum).ConfigureAwait(false));
}
// new solution. bulk sync all asset for the solution
await _assetService.SynchronizeSolutionAssetsAsync(solutionChecksum, cancellationToken).ConfigureAwait(false);
var workspace = new TemporaryWorkspace(await updater.CreateSolutionInfoAsync(solutionChecksum).ConfigureAwait(false));
return(workspace.CurrentSolution);
}