Examples with MIN_CAPACITY org.agrona.concurrent.ringbuffer.ManyToOneRingBuffer.MIN_CAPACITY used on opensource projects

Example 1 with MIN_CAPACITY

use of org.agrona.concurrent.ringbuffer.ManyToOneRingBuffer.MIN_CAPACITY in project agrona by real-logic.

the class ManyToOneRingBufferTest method shouldAllowWritingEmptyMessagesWhenCapacityIsMinimal.

@Test
void shouldAllowWritingEmptyMessagesWhenCapacityIsMinimal() {
    final int msgType = 13;
    final UnsafeBuffer srcBuffer = new UnsafeBuffer(new byte[MIN_CAPACITY]);
    srcBuffer.putLong(0, Long.MAX_VALUE);
    final ManyToOneRingBuffer ringBuffer = new ManyToOneRingBuffer(new UnsafeBuffer(new byte[MIN_CAPACITY + TRAILER_LENGTH]));
    assertTrue(ringBuffer.write(msgType, srcBuffer, 0, 0));
    // ring buffer is full so the second write should fail
    assertFalse(ringBuffer.write(msgType, srcBuffer, 0, 0));
    // write will succeed after the read
    assertEquals(1, ringBuffer.read((msgTypeId, buffer, index, length) -> assertEquals(0, length)));
    assertTrue(ringBuffer.write(msgType, srcBuffer, 0, 0));
    assertEquals(1, ringBuffer.read((msgTypeId, buffer, index, length) -> assertEquals(0, length)));
    assertEquals(0, ringBuffer.read((msgTypeId, buffer, index, length) -> fail()));
}

Example 2 with MIN_CAPACITY

use of org.agrona.concurrent.ringbuffer.ManyToOneRingBuffer.MIN_CAPACITY in project agrona by real-logic.

the class ManyToOneRingBufferTest method shouldWriteMessageAfterInsertedPaddingIsConsumedThusMakeEnoughContiguousSpace.

@Test
void shouldWriteMessageAfterInsertedPaddingIsConsumedThusMakeEnoughContiguousSpace() {
    final int msgType = 42;
    final UnsafeBuffer srcBuffer = new UnsafeBuffer(new byte[MIN_CAPACITY]);
    final ManyToOneRingBuffer ringBuffer = new ManyToOneRingBuffer(new UnsafeBuffer(new byte[MIN_CAPACITY * 2 + TRAILER_LENGTH]));
    assertTrue(ringBuffer.write(msgType, srcBuffer, 0, 0));
    srcBuffer.putLong(0, Long.MAX_VALUE);
    // not enough space in the buffer
    assertFalse(ringBuffer.write(msgType, srcBuffer, 0, MIN_CAPACITY));
    // consume the message and move head
    assertEquals(1, ringBuffer.read((msgTypeId, buffer, index, length) -> assertEquals(0, length)));
    // not enough contiguous space --> insert padding
    assertFalse(ringBuffer.write(msgType, srcBuffer, 0, SIZE_OF_LONG));
    // consume the padding and move head
    assertEquals(0, ringBuffer.read((msgTypeId, buffer, index, length) -> fail()));
    // message fits
    assertTrue(ringBuffer.write(msgType, srcBuffer, 0, SIZE_OF_LONG));
    assertEquals(1, ringBuffer.read((msgTypeId, buffer, index, length) -> assertEquals(Long.MAX_VALUE, buffer.getLong(index))));
    assertEquals(0, ringBuffer.read((msgTypeId, buffer, index, length) -> fail()));
}