public int appendUnfragmentedMessage(
final long defaultVersionFlagsType,
final long defaultSessionId,
final DirectBuffer srcBuffer,
final int srcOffset,
final int length) {
final int frameLength = length + HEADER_LENGTH;
final int alignedLength = align(frameLength, FRAME_ALIGNMENT);
final int termOffset = metaDataBuffer.getAndAddInt(TERM_TAIL_COUNTER_OFFSET, alignedLength);
final UnsafeBuffer termBuffer = this.termBuffer;
final int capacity = termBuffer.capacity();
int resultingOffset = termOffset + alignedLength;
if (resultingOffset > (capacity - HEADER_LENGTH)) {
resultingOffset =
handleEndOfLogCondition(
termBuffer, termOffset, defaultVersionFlagsType, defaultSessionId, capacity);
} else {
applyDefaultHeader(
termBuffer, termOffset, frameLength, defaultVersionFlagsType, defaultSessionId);
termBuffer.putBytes(termOffset + HEADER_LENGTH, srcBuffer, srcOffset, length);
frameLengthOrdered(termBuffer, termOffset, frameLength);
}
return resultingOffset;
}
@Test
public void shouldClaimRegionForZeroCopyEncoding() {
final int headerLength = DEFAULT_HEADER.capacity();
final int msgLength = 20;
final int frameLength = msgLength + headerLength;
final int alignedFrameLength = align(frameLength, FRAME_ALIGNMENT);
final int tail = 0;
final BufferClaim bufferClaim = new BufferClaim();
when(metaDataBuffer.getAndAddInt(TERM_TAIL_COUNTER_OFFSET, alignedFrameLength)).thenReturn(0);
assertThat(termAppender.claim(msgLength, bufferClaim), is(alignedFrameLength));
assertThat(bufferClaim.offset(), is(tail + headerLength));
assertThat(bufferClaim.length(), is(msgLength));
// Map flyweight or encode to buffer directly then call commit() when done
bufferClaim.commit();
final InOrder inOrder = inOrder(termBuffer, metaDataBuffer);
inOrder
.verify(metaDataBuffer, times(1))
.getAndAddInt(TERM_TAIL_COUNTER_OFFSET, alignedFrameLength);
verifyDefaultHeader(inOrder, termBuffer, tail, frameLength);
inOrder.verify(termBuffer, times(1)).putInt(termOffsetOffset(tail), tail, LITTLE_ENDIAN);
}
@Test
public void shouldPadLogAndTripWhenAppendingWithInsufficientRemainingCapacityIncludingHeader() {
final int headerLength = DEFAULT_HEADER.capacity();
final int msgLength = 120;
final int requiredFrameSize = align(headerLength + msgLength, FRAME_ALIGNMENT);
final int tailValue =
termAppender.termBuffer().capacity()
- (requiredFrameSize + (headerLength - FRAME_ALIGNMENT));
final UnsafeBuffer buffer = new UnsafeBuffer(new byte[128]);
final int frameLength = TERM_BUFFER_LENGTH - tailValue;
when(metaDataBuffer.getAndAddInt(TERM_TAIL_COUNTER_OFFSET, requiredFrameSize))
.thenReturn(tailValue);
assertThat(termAppender.append(buffer, 0, msgLength), is(TermAppender.TRIPPED));
final InOrder inOrder = inOrder(termBuffer, metaDataBuffer);
inOrder
.verify(metaDataBuffer, times(1))
.getAndAddInt(TERM_TAIL_COUNTER_OFFSET, requiredFrameSize);
verifyDefaultHeader(inOrder, termBuffer, tailValue, frameLength);
inOrder
.verify(termBuffer, times(1))
.putShort(typeOffset(tailValue), (short) PADDING_FRAME_TYPE, LITTLE_ENDIAN);
inOrder
.verify(termBuffer, times(1))
.putInt(termOffsetOffset(tailValue), tailValue, LITTLE_ENDIAN);
inOrder.verify(termBuffer, times(1)).putIntOrdered(tailValue, frameLength);
}
@Test
public void shouldAppendFrameTwiceToLog() {
final int headerLength = DEFAULT_HEADER.capacity();
final UnsafeBuffer buffer = new UnsafeBuffer(new byte[128]);
final int msgLength = 20;
final int frameLength = msgLength + headerLength;
final int alignedFrameLength = align(frameLength, FRAME_ALIGNMENT);
int tail = 0;
when(metaDataBuffer.getAndAddInt(TERM_TAIL_COUNTER_OFFSET, alignedFrameLength))
.thenReturn(0)
.thenReturn(alignedFrameLength);
assertThat(termAppender.append(buffer, 0, msgLength), is(alignedFrameLength));
assertThat(termAppender.append(buffer, 0, msgLength), is(alignedFrameLength * 2));
final InOrder inOrder = inOrder(termBuffer, metaDataBuffer);
inOrder
.verify(metaDataBuffer, times(1))
.getAndAddInt(TERM_TAIL_COUNTER_OFFSET, alignedFrameLength);
verifyDefaultHeader(inOrder, termBuffer, tail, frameLength);
inOrder.verify(termBuffer, times(1)).putBytes(headerLength, buffer, 0, msgLength);
inOrder.verify(termBuffer, times(1)).putInt(termOffsetOffset(tail), tail, LITTLE_ENDIAN);
inOrder.verify(termBuffer, times(1)).putIntOrdered(tail, frameLength);
tail = alignedFrameLength;
inOrder
.verify(metaDataBuffer, times(1))
.getAndAddInt(TERM_TAIL_COUNTER_OFFSET, alignedFrameLength);
verifyDefaultHeader(inOrder, termBuffer, tail, frameLength);
inOrder.verify(termBuffer, times(1)).putBytes(tail + headerLength, buffer, 0, msgLength);
inOrder.verify(termBuffer, times(1)).putInt(termOffsetOffset(tail), tail, LITTLE_ENDIAN);
inOrder.verify(termBuffer, times(1)).putIntOrdered(tail, frameLength);
}
public int appendFragmentedMessage(
final long defaultVersionFlagsType,
final long defaultSessionId,
final DirectBuffer srcBuffer,
final int srcOffset,
final int length,
final int maxPayloadLength) {
final int numMaxPayloads = length / maxPayloadLength;
final int remainingPayload = length % maxPayloadLength;
final int lastFrameLength =
(remainingPayload > 0) ? align(remainingPayload + HEADER_LENGTH, FRAME_ALIGNMENT) : 0;
final int requiredLength =
(numMaxPayloads * (maxPayloadLength + HEADER_LENGTH)) + lastFrameLength;
int termOffset = metaDataBuffer.getAndAddInt(TERM_TAIL_COUNTER_OFFSET, requiredLength);
final UnsafeBuffer termBuffer = this.termBuffer;
final int capacity = termBuffer.capacity();
int resultingOffset = termOffset + requiredLength;
if (resultingOffset > (capacity - HEADER_LENGTH)) {
resultingOffset =
handleEndOfLogCondition(
termBuffer, termOffset, defaultVersionFlagsType, defaultSessionId, capacity);
} else {
byte flags = BEGIN_FRAG_FLAG;
int remaining = length;
do {
final int bytesToWrite = Math.min(remaining, maxPayloadLength);
final int frameLength = bytesToWrite + HEADER_LENGTH;
final int alignedLength = align(frameLength, FRAME_ALIGNMENT);
applyDefaultHeader(
termBuffer, termOffset, frameLength, defaultVersionFlagsType, defaultSessionId);
termBuffer.putBytes(
termOffset + HEADER_LENGTH, srcBuffer, srcOffset + (length - remaining), bytesToWrite);
if (remaining <= maxPayloadLength) {
flags |= END_FRAG_FLAG;
}
frameFlags(termBuffer, termOffset, flags);
frameLengthOrdered(termBuffer, termOffset, frameLength);
flags = 0;
termOffset += alignedLength;
remaining -= bytesToWrite;
} while (remaining > 0);
}
return resultingOffset;
}
public int claim(
final long defaultVersionFlagsType,
final long defaultSessionId,
final int length,
final BufferClaim bufferClaim) {
final int frameLength = length + HEADER_LENGTH;
final int alignedLength = align(frameLength, FRAME_ALIGNMENT);
final int termOffset = metaDataBuffer.getAndAddInt(TERM_TAIL_COUNTER_OFFSET, alignedLength);
final UnsafeBuffer termBuffer = this.termBuffer;
final int capacity = termBuffer.capacity();
int resultingOffset = termOffset + alignedLength;
if (resultingOffset > (capacity - HEADER_LENGTH)) {
resultingOffset =
handleEndOfLogCondition(
termBuffer, termOffset, defaultVersionFlagsType, defaultSessionId, capacity);
} else {
applyDefaultHeader(
termBuffer, termOffset, frameLength, defaultVersionFlagsType, defaultSessionId);
bufferClaim.wrap(termBuffer, termOffset, frameLength);
}
return resultingOffset;
}
@Test
public void shouldFragmentMessageOverTwoFrames() {
final int msgLength = termAppender.maxPayloadLength() + 1;
final int headerLength = DEFAULT_HEADER.capacity();
final int frameLength = headerLength + 1;
final int requiredCapacity =
align(headerLength + 1, FRAME_ALIGNMENT) + termAppender.maxFrameLength();
final UnsafeBuffer buffer = new UnsafeBuffer(new byte[msgLength]);
when(metaDataBuffer.getAndAddInt(TERM_TAIL_COUNTER_OFFSET, requiredCapacity)).thenReturn(0);
assertThat(termAppender.append(buffer, 0, msgLength), is(requiredCapacity));
int tail = 0;
final InOrder inOrder = inOrder(termBuffer, metaDataBuffer);
inOrder
.verify(metaDataBuffer, times(1))
.getAndAddInt(TERM_TAIL_COUNTER_OFFSET, requiredCapacity);
verifyDefaultHeader(inOrder, termBuffer, tail, termAppender.maxFrameLength());
inOrder
.verify(termBuffer, times(1))
.putBytes(tail + headerLength, buffer, 0, termAppender.maxPayloadLength());
inOrder.verify(termBuffer, times(1)).putByte(flagsOffset(tail), BEGIN_FRAG);
inOrder.verify(termBuffer, times(1)).putInt(termOffsetOffset(tail), tail, LITTLE_ENDIAN);
inOrder.verify(termBuffer, times(1)).putIntOrdered(tail, termAppender.maxFrameLength());
tail = termAppender.maxFrameLength();
verifyDefaultHeader(inOrder, termBuffer, tail, frameLength);
inOrder
.verify(termBuffer, times(1))
.putBytes(tail + headerLength, buffer, termAppender.maxPayloadLength(), 1);
inOrder.verify(termBuffer, times(1)).putByte(flagsOffset(tail), END_FRAG);
inOrder.verify(termBuffer, times(1)).putInt(termOffsetOffset(tail), tail, LITTLE_ENDIAN);
inOrder.verify(termBuffer, times(1)).putIntOrdered(tail, frameLength);
}
