public IFuture <T> LoadFuture(string key, CacheLoader <T> loader)
{
stopwatch_.Start();
T previous_value = old_value_.Value;
try {
// If the T is a value type and its value is default(T) it will never
// be reloaded and always loaded from the cache loader. We could
// make the parameter T nullable, but this makes the code much more
// complicated and we do not want that.
if (typeof(T).IsValueType || (object)previous_value == null)
{
T new_value = loader.Load(key);
return(Set(new_value) ? this : Futures.ImmediateFuture(new_value));
}
else
{
IFuture <T> new_value_future = loader.Reload(key, previous_value);
return(new_value_future ?? Futures.ImmediateFuture(default(T)));
}
} catch (Exception exception) {
return(SetException(exception)
? this
: Futures.ImmediateFailedFuture <T>(exception));
}
}
/// <exception cref="System.Exception"/>
public virtual ListenableFuture <T> Answer(InvocationOnMock invocation)
{
if (this._enclosing.r.NextFloat() < this.faultProbability)
{
return(Futures.ImmediateFailedFuture(new IOException("Injected fault")));
}
return((ListenableFuture <T>)invocation.CallRealMethod());
}
public override Future <FileStatus> Load(Path path)
{
try
{
FileSystem fs = path.GetFileSystem(conf);
return(Futures.ImmediateFuture(fs.GetFileStatus(path)));
}
catch (Exception th)
{
// report failures so it can be memoized
return(Futures.ImmediateFailedFuture(th));
}
}
public override ListenableFuture <Void> SendEdits(long segmentTxId, long firstTxnId
, int numTxns, byte[] data)
{
try
{
ReserveQueueSpace(data.Length);
}
catch (LoggerTooFarBehindException e)
{
return(Futures.ImmediateFailedFuture(e));
}
// When this batch is acked, we use its submission time in order
// to calculate how far we are lagging.
long submitNanos = Runtime.NanoTime();
ListenableFuture <Void> ret = null;
try
{
ret = singleThreadExecutor.Submit(new _Callable_378(this, segmentTxId, firstTxnId
, numTxns, data, submitNanos));
}
finally
{
if (ret == null)
{
// it didn't successfully get submitted,
// so adjust the queue size back down.
UnreserveQueueSpace(data.Length);
}
else
{
// It was submitted to the queue, so adjust the length
// once the call completes, regardless of whether it
// succeeds or fails.
Futures.AddCallback(ret, new _FutureCallback_428(this, data));
}
}
return(ret);
}
internal static Stubber FutureThrows(Exception t)
{
ListenableFuture <object> ret = Futures.ImmediateFailedFuture(t);
return(Org.Mockito.Mockito.DoReturn(ret));
}
