/// <summary>
/// Read all the errors in a log since a given timestamp.
/// </summary>
/// <param name="buffer"> containing the <seealso cref="DistinctErrorLog"/>. </param>
/// <param name="consumer"> to be called for each exception encountered. </param>
/// <param name="sinceTimestamp"> for filtering errors that have been recorded since this time. </param>
/// <returns> the number of entries that has been read. </returns>
public static int Read(IAtomicBuffer buffer, ErrorConsumer consumer, long sinceTimestamp)
{
int entries = 0;
int offset = 0;
int capacity = buffer.Capacity;
while (offset < capacity)
{
int length = buffer.GetIntVolatile(offset + DistinctErrorLog.LengthOffset);
if (0 == length)
{
break;
}
long lastObservationTimestamp = buffer.GetLongVolatile(offset + DistinctErrorLog.LastObservationTimestampOffset);
if (lastObservationTimestamp >= sinceTimestamp)
{
++entries;
consumer(
buffer.GetInt(offset + DistinctErrorLog.ObservationCountOffset),
buffer.GetLong(offset + DistinctErrorLog.FirstObservationTimestampOffset),
lastObservationTimestamp,
buffer.GetStringUtf8(offset + DistinctErrorLog.EncodedErrorOffset,
length - DistinctErrorLog.EncodedErrorOffset));
}
offset += BitUtil.Align(length, DistinctErrorLog.RecordAlignment);
}
return entries;
}
/// <summary>
/// Read all the errors in a log since a given timestamp.
/// </summary>
/// <param name="buffer"> containing the <seealso cref="DistinctErrorLog"/>. </param>
/// <param name="consumer"> to be called for each exception encountered. </param>
/// <param name="sinceTimestamp"> for filtering errors that have been recorded since this time. </param>
/// <returns> the number of entries that has been read. </returns>
public static int Read(IAtomicBuffer buffer, ErrorConsumer consumer, long sinceTimestamp)
{
int entries = 0;
int offset = 0;
int capacity = buffer.Capacity;
while (offset < capacity)
{
int length = buffer.GetIntVolatile(offset + DistinctErrorLog.LengthOffset);
if (0 == length)
{
break;
}
long lastObservationTimestamp = buffer.GetLongVolatile(offset + DistinctErrorLog.LastObservationTimestampOffset);
if (lastObservationTimestamp >= sinceTimestamp)
{
++entries;
consumer(
buffer.GetInt(offset + DistinctErrorLog.ObservationCountOffset),
buffer.GetLong(offset + DistinctErrorLog.FirstObservationTimestampOffset),
lastObservationTimestamp,
buffer.GetStringWithoutLengthUtf8(offset + DistinctErrorLog.EncodedErrorOffset, length - DistinctErrorLog.EncodedErrorOffset));
}
offset += BitUtil.Align(length, DistinctErrorLog.RecordAlignment);
}
return(entries);
}
public void ShouldInsertIntoEmptyBuffer()
{
UnsafeBuffer packet = new UnsafeBuffer(new byte[256]);
const int termOffset = 0;
const int srcOffset = 0;
const int length = 256;
packet.PutInt(srcOffset, length);
A.CallTo(() => _termBuffer.GetInt(0)).Returns(length);
TermRebuilder.Insert(_termBuffer, termOffset, packet, length);
A.CallTo(() => _termBuffer.PutBytes(termOffset, packet, srcOffset, length)).MustHaveHappened()
.Then(A.CallTo(() => _termBuffer.PutIntOrdered(termOffset, length)).MustHaveHappened());
}
/// <summary>
/// Insert a packet of frames into the log at the appropriate termOffset as indicated by the term termOffset header.
///
/// If the packet has already been inserted then this is a noop.
/// </summary>
/// <param name="termBuffer"> into which the packet should be inserted. </param>
/// <param name="termOffset"> in the term at which the packet should be inserted. </param>
/// <param name="packet"> containing a sequence of frames. </param>
/// <param name="length"> of the packet of frames in bytes. </param>
public static void Insert(IAtomicBuffer termBuffer, int termOffset, UnsafeBuffer packet, int length)
{
if (0 == termBuffer.GetInt(termOffset))
{
termBuffer.PutBytes(termOffset + DataHeaderFlyweight.HEADER_LENGTH, packet,
DataHeaderFlyweight.HEADER_LENGTH, length - DataHeaderFlyweight.HEADER_LENGTH);
termBuffer.PutLong(termOffset + 24, packet.GetLong(24));
termBuffer.PutLong(termOffset + 16, packet.GetLong(16));
termBuffer.PutLong(termOffset + 8, packet.GetLong(8));
termBuffer.PutLongOrdered(termOffset, packet.GetLong(0));
}
}
/// <summary>
/// Get the maximum log position that a tracking session can reach. The get operation has volatile semantics.
/// </summary>
/// <param name="counters"> to search within. </param>
/// <param name="counterId"> for the active commit position. </param>
/// <returns> the log position if found otherwise <see cref="Aeron.NULL_VALUE"/>. </returns>
public static long GetMaxLogPosition(CountersReader counters, int counterId)
{
IAtomicBuffer buffer = counters.MetaDataBuffer;
if (counters.GetCounterState(counterId) == CountersReader.RECORD_ALLOCATED)
{
int recordOffset = CountersReader.MetaDataOffset(counterId);
if (buffer.GetInt(recordOffset + CountersReader.TYPE_ID_OFFSET) == COMMIT_POSITION_TYPE_ID)
{
return(buffer.GetLongVolatile(recordOffset + CountersReader.KEY_OFFSET + MAX_LOG_POSITION_OFFSET));
}
}
return(Aeron.Aeron.NULL_VALUE);
}
/// <summary>
/// Set the maximum log position that a tracking session can reach. The set operation has volatile semantics.
/// </summary>
/// <param name="counters"> to search within. </param>
/// <param name="counterId"> for the active commit position. </param>
/// <param name="value"> to set for the new max position. </param>
/// <exception cref="ClusterException"> if the counter id is not valid. </exception>
public static void SetMaxLogPosition(CountersReader counters, int counterId, long value)
{
IAtomicBuffer buffer = counters.MetaDataBuffer;
if (counters.GetCounterState(counterId) == CountersReader.RECORD_ALLOCATED)
{
int recordOffset = CountersReader.MetaDataOffset(counterId);
if (buffer.GetInt(recordOffset + CountersReader.TYPE_ID_OFFSET) == COMMIT_POSITION_TYPE_ID)
{
buffer.PutLongVolatile(recordOffset + CountersReader.KEY_OFFSET + MAX_LOG_POSITION_OFFSET, value);
return;
}
}
throw new ClusterException("Counter id not valid: " + counterId);
}
/// <summary>
/// Find the counter id for a type of counter in a cluster.
/// </summary>
/// <param name="counters"> to search within. </param>
/// <param name="typeId"> of the counter. </param>
/// <param name="clusterId"> to which the allocated counter belongs. </param>
/// <returns> the matching counter id or <seealso cref="Aeron.Aeron.NULL_VALUE"/> if not found. </returns>
public static int Find(CountersReader counters, int typeId, int clusterId)
{
IAtomicBuffer buffer = counters.MetaDataBuffer;
for (int i = 0, size = counters.MaxCounterId; i < size; i++)
{
int recordOffset = CountersReader.MetaDataOffset(i);
if (counters.GetCounterState(i) == CountersReader.RECORD_ALLOCATED &&
counters.GetCounterTypeId(i) == typeId &&
buffer.GetInt(recordOffset + CountersReader.KEY_OFFSET) == clusterId)
{
return(i);
}
}
return(Aeron.Aeron.NULL_VALUE);
}
/// <summary>
/// Type of the message received.
/// </summary>
/// <returns> typeId of the message received. </returns>
public int TypeId()
{
return(_buffer.GetInt(RecordDescriptor.GetTypeOffset(_recordOffset)));
}
public static int FrameLength(IAtomicBuffer buffer, int termOffset)
{
return(buffer.GetInt(termOffset));
}
public void ShouldGetIntFromNativeBuffer(IAtomicBuffer buffer)
{
Marshal.WriteInt32(buffer.BufferPointer, Index, IntValue);
Assert.That(buffer.GetInt(Index), Is.EqualTo(IntValue));
}
public void ShouldReceiveFirstMessageFromBuffer()
{
const int length = 8;
var recordLength = length + RecordDescriptor.HeaderLength;
var recordLengthAligned = BitUtil.Align(recordLength, RecordDescriptor.RecordAlignment);
long tail = recordLengthAligned;
var latestRecord = tail - recordLengthAligned;
var recordOffset = (int)latestRecord;
A.CallTo(() => _buffer.GetLongVolatile(TailIntentCounterOffset)).Returns(tail);
A.CallTo(() => _buffer.GetLongVolatile(TailCounterIndex)).Returns(tail);
A.CallTo(() => _buffer.GetInt(RecordDescriptor.GetLengthOffset(recordOffset))).Returns(recordLength);
A.CallTo(() => _buffer.GetInt(RecordDescriptor.GetTypeOffset(recordOffset))).Returns(MsgTypeID);
Assert.True(_broadcastReceiver.ReceiveNext());
Assert.AreEqual(MsgTypeID, _broadcastReceiver.TypeId());
Assert.AreEqual(_buffer, _broadcastReceiver.Buffer());
Assert.AreEqual(RecordDescriptor.GetMsgOffset(recordOffset), _broadcastReceiver.Offset());
Assert.AreEqual(length, _broadcastReceiver.Length());
Assert.True(_broadcastReceiver.Validate());
A.CallTo(() => _buffer.GetLongVolatile(TailCounterIndex)).MustHaveHappened();
A.CallTo(() => _buffer.GetLongVolatile(TailIntentCounterOffset)).MustHaveHappened();
}
/// <summary>
/// Get the length of a frame from the header.
/// </summary>
/// <param name="buffer"> containing the frame. </param>
/// <param name="termOffset"> at which a frame begins. </param>
/// <returns> the value for the frame length. </returns>
public static int FrameLength(IAtomicBuffer buffer, int termOffset)
{
return buffer.GetInt(termOffset);
}