OffHeapMemoryBuffer.update does not reuse the same pointer
----------------------------------------------------------
Key: DIRECTMEMORY-49
URL: https://issues.apache.org/jira/browse/DIRECTMEMORY-49
Project: Apache DirectMemory
Issue Type: Bug
Reporter: Benoit Perroud
Priority: Minor
OffHeapMemoryBuffer.update actually free and store again the payload, which
leads to another pointer allocation. This is fine in lots of case, but when the
buffer is full, we still want the update to succeed.
Moreover, update should throw an exception (BufferOverFlowException for
example) when the new payload data is bigger than the previous.
Considering the following test, where I allocate just enough space for 1
object, I store it, and then want to update it content. I could hope this use
case succeed, but it's actually not the case
@Test
public void testOffHeapMemoryBufferUpdate() {
final int NUMBER_OF_OBJECTS = 1;
final int BUFFER_SIZE = NUMBER_OF_OBJECTS * 4; // allocate 4 bytes
final OffHeapMemoryBuffer offHeapMemoryBuffer =
OffHeapMemoryBufferImpl.createNew(BUFFER_SIZE);
// generate 4 random bytes, store, read back and assert
final byte[] payload = generateRandomPayload(4);
final Pointer pointer = offHeapMemoryBuffer.store(payload);
Assert.assertNotNull(pointer);
Assert.assertEquals(new String(payload), new
String(offHeapMemoryBuffer.retrieve(pointer)));
// generate another payload, update it, read it and assert.
byte[] otherPayload = generateRandomPayload(4);
final Pointer otherPointer = offHeapMemoryBuffer.update(pointer,
otherPayload);
Assert.assertNotNull(otherPointer);
Assert.assertEquals(new String(otherPayload), new
String(offHeapMemoryBuffer.retrieve(otherPointer)));
}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
