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Imported Upstream version 5.4.0.167

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Former-commit-id: 5624ac747d633e885131e8349322922b6a59baaa
This commit is contained in:
Xamarin Public Jenkins (auto-signing)
2017-08-21 15:34:15 +00:00
parent e49d6f06c0
commit 536cd135cc
12856 changed files with 563812 additions and 223249 deletions
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173
mcs/class/referencesource/System.Web/Cache/CacheDependency.cs
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@@ -26,10 +26,6 @@ namespace System.Web.Caching {
using System.Runtime.Caching;
#endif
internal interface ICacheDependencyChanged {
void DependencyChanged(Object sender, EventArgs e);
}
/// <devdoc>
/// <para>The <see langword='CacheDependency'/> class tracks cache dependencies, which can be files,
@@ -50,7 +46,7 @@ namespace System.Web.Caching {
string _uniqueID; // used by HttpCachePolicy for the ETag
object _depFileInfos; // files to monitor for changes, either a DepFileInfo or array of DepFileInfos
object _entries; // cache entries we are dependent on, either a string or array of strings
ICacheDependencyChanged _objNotify; // Associated object to notify when a change occurs
Action<Object, EventArgs> _objNotify; // Associated object to notify when a change occurs
SafeBitVector32 _bits; // status bits for ready, used, changed, disposed
DateTime _utcLastModified; // Time of last modified item
#if USE_MEMORY_CACHE
@@ -59,7 +55,7 @@ namespace System.Web.Caching {
#endif
static readonly string[] s_stringsEmpty;
static readonly CacheEntry[] s_entriesEmpty;
static readonly DepCacheInfo[] s_entriesEmpty;
static readonly CacheDependency s_dependencyEmpty;
static readonly DepFileInfo[] s_depFileInfosEmpty;
@@ -78,9 +74,14 @@ namespace System.Web.Caching {
internal FileAttributesData _fad;
}
internal class DepCacheInfo {
internal CacheStoreProvider _cacheStore;
internal string _key;
}
static CacheDependency() {
s_stringsEmpty = new string[0];
s_entriesEmpty = new CacheEntry[0];
s_entriesEmpty = new DepCacheInfo[0];
s_dependencyEmpty = new CacheDependency(0);
s_depFileInfosEmpty = new DepFileInfo[0];
}
@@ -205,7 +206,7 @@ namespace System.Web.Caching {
void InitForMemoryCache(bool isPublic, string[] filenamesArg, string[] cachekeysArg, CacheDependency dependency, DateTime utcStart) {
bool dispose = true;
try {
MemCache memCache = HttpRuntime.CacheInternal as MemCache;
MemCache memCache = HttpRuntime.InternalCache as MemCache;
_bits = new SafeBitVector32(0);
_utcLastModified = DateTime.MinValue;
IList<String> files = filenamesArg;
@@ -308,9 +309,9 @@ namespace System.Web.Caching {
}
#endif
DepFileInfo[] depFileInfos = s_depFileInfosEmpty;
CacheEntry[] depEntries = s_entriesEmpty;
DepCacheInfo[] depEntries = s_entriesEmpty;
string [] filenames, cachekeys;
CacheInternal cacheInternal;
CacheStoreProvider cache;
_bits = new SafeBitVector32(0);
@@ -420,13 +421,13 @@ namespace System.Web.Caching {
// copy cache entries
if (d_entries != null) {
if (d_entries is CacheEntry) {
depEntries = new CacheEntry[1] {(CacheEntry) (d_entries)};
if (d_entries is DepCacheInfo) {
depEntries = new DepCacheInfo[1] { (DepCacheInfo)(d_entries) };
}
else {
depEntries = (CacheEntry[]) (d_entries);
depEntries = (DepCacheInfo[])(d_entries);
// verify that the object was fully constructed
foreach (CacheEntry entry in depEntries) {
foreach (DepCacheInfo entry in depEntries) {
if (entry == null) {
_bits[CHANGED] = true;
// There is nothing to dispose because we haven't started
@@ -501,41 +502,32 @@ namespace System.Web.Caching {
// Monitor other cache entries for changes
int lenMyEntries = depEntries.Length + cachekeys.Length;
DateTime lastUpdated;
if (lenMyEntries > 0 && !_bits[CHANGED]) {
CacheEntry[] myEntries = new CacheEntry[lenMyEntries];
DepCacheInfo[] myEntries = new DepCacheInfo[lenMyEntries];
// Monitor entries from the existing cache dependency
int i = 0;
foreach (CacheEntry entry in depEntries) {
entry.AddCacheDependencyNotify(this);
foreach (DepCacheInfo entry in depEntries) {
entry._cacheStore.AddDependent(entry._key, this, out lastUpdated);
myEntries[i++] = entry;
}
// Monitor new entries specified for this depenedency
// Entries must be added to cache, and created before the startTime
cacheInternal = HttpRuntime.CacheInternal;
cache = isPublic ? HttpRuntime.Cache.ObjectCache : HttpRuntime.Cache.InternalCache;
foreach (string k in cachekeys) {
CacheEntry entry = (CacheEntry) cacheInternal.DoGet(isPublic, k, CacheGetOptions.ReturnCacheEntry);
if (entry != null) {
entry.AddCacheDependencyNotify(this);
myEntries[i++] = entry;
if (cache.AddDependent(k, this, out lastUpdated)) {
myEntries[i++] = new DepCacheInfo() { _cacheStore = cache, _key = k };
if (entry.UtcCreated > _utcLastModified) {
_utcLastModified = entry.UtcCreated;
if (lastUpdated > _utcLastModified) {
_utcLastModified = lastUpdated;
}
if ( entry.State != CacheEntry.EntryState.AddedToCache ||
entry.UtcCreated > utcStart) {
if (lastUpdated > utcStart) { // Cache item has been updated since start, consider changed
#if DBG
if (entry.State != CacheEntry.EntryState.AddedToCache) {
Debug.Trace("CacheDependencyInit", "Entry is not in cache, considered changed:" + k);
}
else {
Debug.Trace("CacheDependencyInit", "Changes occurred to entry since start time:" + k);
}
Debug.Trace("CacheDependencyInit", "Changes occurred to entry since start time:" + k);
#endif
_bits[CHANGED] = true;
break;
}
@@ -583,7 +575,7 @@ namespace System.Web.Caching {
// Set this bit just in case our derived ctor forgot to call FinishInit()
_bits[DERIVED_INIT] = true;
if (Use()) {
if (TakeOwnership()) {
// Do the dispose only if the cache has not already used us
DisposeInternal();
}
@@ -660,17 +652,17 @@ namespace System.Web.Caching {
// stop monitoring cache items
if (l_entries != null) {
CacheEntry oneEntry = l_entries as CacheEntry;
DepCacheInfo oneEntry = l_entries as DepCacheInfo;
if (oneEntry != null) {
oneEntry.RemoveCacheDependencyNotify(this);
oneEntry._cacheStore.RemoveDependent(oneEntry._key, this);
}
else {
CacheEntry[] entries = (CacheEntry[]) l_entries;
foreach (CacheEntry entry in entries) {
DepCacheInfo[] entries = (DepCacheInfo[])l_entries;
foreach (DepCacheInfo entry in entries) {
// ensure that we handle partially contructed
// objects by checking entry for null
if (entry != null) {
entry.RemoveCacheDependencyNotify(this);
entry._cacheStore.RemoveDependent(entry._key, this);
}
}
}
@@ -686,8 +678,10 @@ namespace System.Web.Caching {
#endif
}
// allow the first user to declare ownership
internal bool Use() {
/// <devdoc>
/// <para>Allow the first user to declare exclusive ownership of this dependency.</para>
/// </devdoc>
public bool TakeOwnership() {
return _bits.ChangeValue(USED, true);
}
@@ -706,22 +700,38 @@ namespace System.Web.Caching {
}
}
protected void SetUtcLastModified(DateTime utcLastModified) {
_utcLastModified = utcLastModified;
}
//
// Add/remove an NotifyDependencyChanged notification.
//
internal void SetCacheDependencyChanged(ICacheDependencyChanged objNotify) {
public void KeepDependenciesAlive() {
if (_entries != null) {
// update the last access time of every cache item that depends on this dependency
DepCacheInfo oneEntry = _entries as DepCacheInfo;
if (oneEntry != null) {
oneEntry._cacheStore.Get(oneEntry._key);
return;
}
foreach (DepCacheInfo entry in (DepCacheInfo[])_entries) {
if (entry != null) {
object item = entry._cacheStore.Get(entry._key);
}
}
}
}
/// <devdoc>
/// <para>Add an Action to handle notifying interested party in changes to this dependency.</para>
/// </devdoc>
public void SetCacheDependencyChanged(Action<Object, EventArgs> dependencyChangedAction) {
Debug.Assert(_objNotify == null, "_objNotify == null");
// Set this bit just in case our derived ctor forgot to call FinishInit()
_bits[DERIVED_INIT] = true;
if (!_bits[BASE_DISPOSED]) {
_objNotify = objNotify;
_objNotify = dependencyChangedAction;
}
}
@@ -768,23 +778,23 @@ namespace System.Web.Caching {
// get unique id from cache entries
l_entries = _entries;
if (l_entries != null) {
CacheEntry oneEntry = l_entries as CacheEntry;
DepCacheInfo oneEntry = l_entries as DepCacheInfo;
if (oneEntry != null) {
if (sb == null)
sb = new StringBuilder();
sb.Append(oneEntry.Key);
sb.Append(oneEntry.UtcCreated.Ticks.ToString(CultureInfo.InvariantCulture));
sb.Append(oneEntry._key);
sb.Append(oneEntry.GetHashCode().ToString(CultureInfo.InvariantCulture));
}
else {
CacheEntry[] entries = (CacheEntry[]) l_entries;
foreach (CacheEntry entry in entries) {
DepCacheInfo[] entries = (DepCacheInfo[])l_entries;
foreach (DepCacheInfo entry in entries) {
// ensure that we handle partially contructed
// objects by checking entry for null
if (entry != null) {
if (sb == null)
sb = new StringBuilder();
sb.Append(entry.Key);
sb.Append(entry.UtcCreated.Ticks.ToString(CultureInfo.InvariantCulture));
sb.Append(entry._key);
sb.Append(entry.GetHashCode().ToString(CultureInfo.InvariantCulture));
}
}
}
@@ -805,24 +815,6 @@ namespace System.Web.Caching {
return _uniqueID;
}
//
// Return the cacheEntries monitored by this dependency
//
internal CacheEntry[] CacheEntries {
get {
if (_entries == null) {
return null;
}
CacheEntry oneEntry = _entries as CacheEntry;
if (oneEntry != null) {
return new CacheEntry[1] {oneEntry};
}
return (CacheEntry[]) _entries;
}
}
//
// This object has changed, so fire the NotifyDependencyChanged event.
// We only allow this event to be fired once.
@@ -832,20 +824,20 @@ namespace System.Web.Caching {
if (_bits.ChangeValue(CHANGED, true)) {
_utcLastModified = DateTime.UtcNow;
ICacheDependencyChanged objNotify = _objNotify;
if (objNotify != null && !_bits[BASE_DISPOSED]) {
Action<Object, EventArgs> action = _objNotify as Action<Object, EventArgs>;
if (action != null && !_bits[BASE_DISPOSED]) {
Debug.Trace("CacheDependencyNotifyDependencyChanged", "change occurred");
objNotify.DependencyChanged(sender, e);
action(sender, e);
}
DisposeInternal();
}
}
//
// ItemRemoved is called when a cache entry we are monitoring has been removed.
//
internal void ItemRemoved() {
/// <devdoc>
/// <para>ItemRemoved should be called when an ICacheEntry we are monitoring has been removed.</para>
/// </devdoc>
public void ItemRemoved() {
NotifyDependencyChanged(this, EventArgs.Empty);
}
@@ -880,12 +872,12 @@ namespace System.Web.Caching {
// Check and see if we are dependent on any cache entries
l_entries = _entries;
if (l_entries != null) {
CacheEntry oneEntry = l_entries as CacheEntry;
DepCacheInfo oneEntry = l_entries as DepCacheInfo;
if (oneEntry != null) {
return false;
}
else {
CacheEntry[] entries = (CacheEntry[]) l_entries;
DepCacheInfo[] entries = (DepCacheInfo[]) l_entries;
if (entries != null && entries.Length > 0) {
return false;
}
@@ -952,7 +944,7 @@ namespace System.Web.Caching {
}
}
public sealed class AggregateCacheDependency : CacheDependency, ICacheDependencyChanged {
public sealed class AggregateCacheDependency : CacheDependency {
ArrayList _dependencies;
bool _disposed;
@@ -979,10 +971,9 @@ namespace System.Web.Caching {
throw new ArgumentNullException("dependencies");
}
if (!d.Use()) {
if (!d.TakeOwnership()) {
throw new InvalidOperationException(SR.GetString(SR.Cache_dependency_used_more_that_once));
}
}
} }
// add dependencies, and check if any have changed
bool hasChanged = false;
@@ -995,7 +986,9 @@ namespace System.Web.Caching {
_dependencies.AddRange(dependencies);
foreach (CacheDependency d in dependencies) {
d.SetCacheDependencyChanged(this);
d.SetCacheDependencyChanged((Object sender, EventArgs args) => {
DependencyChanged(sender, args);
});
if (d.UtcLastModified > utcLastModified) {
utcLastModified = d.UtcLastModified;
@@ -1041,7 +1034,7 @@ namespace System.Web.Caching {
// Forward call from the aggregate to the CacheEntry
/// <internalonly/>
void ICacheDependencyChanged.DependencyChanged(Object sender, EventArgs e) {
void DependencyChanged(Object sender, EventArgs e) {
NotifyDependencyChanged(sender, e);
}
@@ -1122,7 +1115,7 @@ namespace System.Web.Caching {
return true;
}
/// <summary>
/// This method will return only the file dependencies from this dependency
/// </summary>