internal static CacheEntry CreateFromStream(BinaryReader reader)
{
CacheEntryTypes entryType = (CacheEntryTypes)reader.ReadByte();
CacheEntry entry = null;
switch (entryType)
{
case CacheEntryTypes.BuildItem:
entry = new BuildItemCacheEntry();
break;
case CacheEntryTypes.BuildResult:
entry = new BuildResultCacheEntry();
break;
case CacheEntryTypes.Property:
entry = new PropertyCacheEntry();
break;
default:
ErrorUtilities.VerifyThrow(false, "Should not get to the default of CacheEntryCustomSerializer CreateFromStream");
break;
}
entry.CreateFromStream(reader);
return(entry);
}
/// <summary>
/// Get a cached build result if available for the given request. This method is thread safe.
/// </summary>
/// <param name="buildRequest"></param>
/// <param name="actuallyBuiltTargets"></param>
/// <returns></returns>
internal BuildResult GetCachedBuildResult(BuildRequest buildRequest, out ArrayList actuallyBuiltTargets)
{
actuallyBuiltTargets = null;
PropertyCacheEntry defaultTargetsCacheEntry, initialTargetsCacheEntry, projectIdCacheEntry;
// No writes here, but since we're reading multiple values we want to get a consistent view of the cache
cacheScopeReaderWriterLock.AcquireReaderLock(Timeout.Infinite);
try
{
defaultTargetsCacheEntry = (PropertyCacheEntry)GetCacheEntry(Constants.defaultTargetCacheName);
initialTargetsCacheEntry = (PropertyCacheEntry)GetCacheEntry(Constants.initialTargetCacheName);
projectIdCacheEntry = (PropertyCacheEntry)GetCacheEntry(Constants.projectIdCacheName);
}
finally
{
cacheScopeReaderWriterLock.ReleaseReaderLock();
}
// If we ever built anything in this project we must have the default and initial targets.
if (defaultTargetsCacheEntry == null && initialTargetsCacheEntry == null)
{
return(null);
}
ErrorUtilities.VerifyThrow(projectIdCacheEntry != null, "We should always have the projectId cache entry");
ErrorUtilities.VerifyThrow(defaultTargetsCacheEntry != null && initialTargetsCacheEntry != null,
"We should have both the initial and default targets in the cache");
ArrayList targetsToBuild = new ArrayList(initialTargetsCacheEntry.Value.Split(new char[] { ';' }, StringSplitOptions.RemoveEmptyEntries));
if (buildRequest.TargetNames == null || buildRequest.TargetNames.Length == 0)
{
targetsToBuild.AddRange(defaultTargetsCacheEntry.Value.Split(new char[] { ';' }, StringSplitOptions.RemoveEmptyEntries));
}
else
{
targetsToBuild.AddRange(buildRequest.TargetNames);
}
// Create variable to hold the cached outputs
Hashtable outputsByTargetName = new Hashtable(targetsToBuild.Count);
Hashtable resultByTarget = new Hashtable(targetsToBuild.Count, StringComparer.OrdinalIgnoreCase);
bool overallSuccess = true;
bool missingValues = false;
// No writes here, but since we're reading multiple values we want to get a consistent view of the cache
cacheScopeReaderWriterLock.AcquireReaderLock(Timeout.Infinite);
try
{
for (int i = 0; i < targetsToBuild.Count; i++)
{
string targetName = EscapingUtilities.UnescapeAll((string)targetsToBuild[i]);
if (ContainsCacheEntry(targetName))
{
BuildResultCacheEntry cacheEntry = (BuildResultCacheEntry)GetCacheEntry(targetName);
overallSuccess = overallSuccess && cacheEntry.BuildResult;
resultByTarget[targetName] = (cacheEntry.BuildResult) ?
Target.BuildState.CompletedSuccessfully : Target.BuildState.CompletedUnsuccessfully;
// Restore output items for successful targets
if (cacheEntry.BuildResult)
{
outputsByTargetName[targetName] = cacheEntry.BuildItems;
}
// We found a failed target - cut the loop short
else
{
break;
}
}
else
{
missingValues = true;
break;
}
}
}
finally
{
cacheScopeReaderWriterLock.ReleaseReaderLock();
}
if (missingValues)
{
return(null);
}
actuallyBuiltTargets = targetsToBuild;
return(new BuildResult(outputsByTargetName, resultByTarget, overallSuccess, buildRequest.HandleId, buildRequest.RequestId,
int.Parse(projectIdCacheEntry.Value, CultureInfo.InvariantCulture), false /* use results cache */,
defaultTargetsCacheEntry.Value, initialTargetsCacheEntry.Value, 0, 0, 0));
}
/// <summary>
/// This method adds cached results for each target results for which are contained inside
/// the build result. This method is thread safe.
/// </summary>
internal void AddCacheEntryForBuildResults(BuildResult buildResult)
{
ErrorUtilities.VerifyThrow(buildResult != null, "Expect a non-null build result");
// Don't cache results if they are marked as uncacheable
if (!buildResult.UseResultCache)
{
return;
}
cacheScopeReaderWriterLock.AcquireWriterLock(Timeout.Infinite);
try
{
if (!ContainsCacheEntry(Constants.defaultTargetCacheName))
{
// If the project file is malformed the build may fail without initializing the initialtargets or
// the default targests fields. The retrieval code expects non-null values
// so it is necessary to replace null with empty string
ErrorUtilities.VerifyThrow(buildResult.EvaluationResult == false || buildResult.InitialTargets != null &&
buildResult.DefaultTargets != null,
"Expect initial targets to be non-null for successful builds");
string defaultTargets = buildResult.DefaultTargets == null ? String.Empty : buildResult.DefaultTargets;
PropertyCacheEntry defaultTargetsCacheEntry = new PropertyCacheEntry(Constants.defaultTargetCacheName, defaultTargets);
AddCacheEntryInternal(defaultTargetsCacheEntry);
string initialTargets = buildResult.InitialTargets == null ? String.Empty : buildResult.InitialTargets;
PropertyCacheEntry initialTargetsCacheEntry = new PropertyCacheEntry(Constants.initialTargetCacheName, initialTargets);
AddCacheEntryInternal(initialTargetsCacheEntry);
}
if (!ContainsCacheEntry(Constants.projectIdCacheName))
{
PropertyCacheEntry projectIdCacheEntry = new PropertyCacheEntry(Constants.projectIdCacheName, buildResult.ProjectId.ToString(CultureInfo.InvariantCulture));
AddCacheEntryInternal(projectIdCacheEntry);
}
IDictionary outputsByTargetName = buildResult.OutputsByTarget;
//Create single entry for each target in the request
foreach (DictionaryEntry entry in buildResult.ResultByTarget)
{
Target.BuildState buildState = (Target.BuildState)entry.Value;
// Only cache successful and failed targets
if ((buildState == Target.BuildState.CompletedSuccessfully) ||
(buildState == Target.BuildState.CompletedUnsuccessfully))
{
BuildItem[] targetOutputs = null;
// Only cache output items for successful targets
if (buildState == Target.BuildState.CompletedSuccessfully)
{
ErrorUtilities.VerifyThrow(buildResult.OutputsByTarget.Contains(entry.Key),
"We must have build results for successful targets");
BuildItem[] outputItems = (BuildItem[])buildResult.OutputsByTarget[entry.Key];
// It's essential that we clear out any pointers to the project from the BuildItem;
// otherwise the cache will hold onto the project, and not save any memory.
if (outputItems != null)
{
for (int i = 0; i < outputItems.Length; i++)
{
outputItems[i] = outputItems[i].VirtualClone(true /* remove references to minimise transitive size */);
}
}
targetOutputs = (BuildItem[])buildResult.OutputsByTarget[entry.Key];
}
BuildResultCacheEntry cacheEntry = new BuildResultCacheEntry((string)entry.Key, targetOutputs,
(buildState == Target.BuildState.CompletedSuccessfully));
if (Engine.debugMode)
{
Console.WriteLine("+++Adding cache entry for " + (string)entry.Key + " in " +
this.ScopeName + " result: " + (buildState == Target.BuildState.CompletedSuccessfully));
}
AddCacheEntryInternal(cacheEntry);
}
}
}
finally
{
cacheScopeReaderWriterLock.ReleaseWriterLock();
}
}
