Examples of ODirectMemory

com.orientechnologies.common.directmemory.ODirectMemory
Abstraction of different kind of implementations of non-GC memory, memory that managed not by GC but directly by application. Access to such memory is slower than to "native" Java memory but we get performance gain eliminating GC overhead. The main application of such memory different types of caches. @author Artem Orobets, Andrey Lomakin

Examples of com.orientechnologies.common.directmemory.ODirectMemory


@Test
public class JNADirectMemoryTest {
  public void testLong() {
    final Random rnd = new Random();
    ODirectMemory directMemory = new OJNADirectMemory();


    long value = rnd.nextLong();


    long pointer = directMemory.allocate(OLongSerializer.LONG_SIZE);
    directMemory.setLong(pointer, value);


    Assert.assertEquals(directMemory.getLong(pointer), value);


    directMemory.free(pointer);
  }

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Examples of com.orientechnologies.common.directmemory.ODirectMemory

    directMemory.free(pointer);
  }


  public void testInt() {
    final Random rnd = new Random();
    ODirectMemory directMemory = new OJNADirectMemory();


    int value = rnd.nextInt();
    long pointer = directMemory.allocate(OIntegerSerializer.INT_SIZE);
    directMemory.setInt(pointer, value);


    Assert.assertEquals(directMemory.getInt(pointer), value);


    directMemory.free(pointer);
  }

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Examples of com.orientechnologies.common.directmemory.ODirectMemory

    directMemory.free(pointer);
  }


  public void testChar() {
    final Random rnd = new Random();
    ODirectMemory directMemory = new OJNADirectMemory();


    char value = (char) rnd.nextInt();
    long pointer = directMemory.allocate(OCharSerializer.CHAR_SIZE);
    directMemory.setChar(pointer, value);


    Assert.assertEquals(directMemory.getChar(pointer), value);


    directMemory.free(pointer);
  }

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Examples of com.orientechnologies.common.directmemory.ODirectMemory

    directMemory.free(pointer);
  }


  public void testByte() {
    final Random rnd = new Random();
    ODirectMemory directMemory = new OJNADirectMemory();


    byte[] value = new byte[1];
    rnd.nextBytes(value);


    long pointer = directMemory.allocate(1);
    directMemory.setByte(pointer, value[0]);


    Assert.assertEquals(directMemory.getByte(pointer), value[0]);


    directMemory.free(pointer);
  }

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Examples of com.orientechnologies.common.directmemory.ODirectMemory

  }




  public void testBytesWithoutOffset() {
    final Random rnd = new Random();
    ODirectMemory directMemory = new OJNADirectMemory();


    byte[] value = new byte[256];
    rnd.nextBytes(value);


    long pointer = directMemory.allocate(value.length);
    directMemory.set(pointer, value, 0, value.length);


    Assert.assertEquals(directMemory.get(pointer, value.length), value);
    Assert.assertEquals(directMemory.get(pointer, value.length / 2), Arrays.copyOf(value, value.length / 2));


    byte[] result = new byte[value.length];
    directMemory.get(pointer, result, value.length / 2, value.length / 2);


    byte[] expectedResult = new byte[value.length];
    System.arraycopy(value, 0, expectedResult, expectedResult.length / 2, expectedResult.length / 2);


    Assert.assertEquals(result, expectedResult);


    directMemory.free(pointer);
  }

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Examples of com.orientechnologies.common.directmemory.ODirectMemory

    directMemory.free(pointer);
  }


  public void testBytesWithOffset() {
    final Random rnd = new Random();
    ODirectMemory directMemory = new OJNADirectMemory();


    byte[] value = new byte[256];
    rnd.nextBytes(value);


    long pointer = directMemory.allocate(value.length);
    directMemory.set(pointer, value, value.length / 2, value.length / 2);


    Assert.assertEquals(directMemory.get(pointer, value.length / 2), Arrays.copyOfRange(value, value.length / 2, value.length));


    directMemory.free(pointer);
  }

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Examples of com.orientechnologies.common.directmemory.ODirectMemory

    directMemory.free(pointer);
  }


  public void testCopyData() {
    final Random rnd = new Random();
    ODirectMemory directMemory = new OJNADirectMemory();


    byte[] value = new byte[256];
    rnd.nextBytes(value);


    long pointer = directMemory.allocate(value.length);
    directMemory.set(pointer, value, 0, value.length);


    directMemory.moveData(pointer, pointer + value.length / 2, value.length / 2);


    System.arraycopy(value, 0, value, value.length / 2, value.length / 2);


    Assert.assertEquals(value, directMemory.get(pointer, value.length));


    directMemory.free(pointer);
  }

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Examples of com.orientechnologies.common.directmemory.ODirectMemory

    directMemory.free(pointer);
  }


  public void testCopyDataOverlap() {
    final Random rnd = new Random();
    ODirectMemory directMemory = new OJNADirectMemory();


    byte[] value = new byte[256];
    rnd.nextBytes(value);


    long pointer = directMemory.allocate(value.length);
    directMemory.set(pointer, value, 0, value.length);


    directMemory.moveData(pointer, pointer + 1, value.length / 3);


    System.arraycopy(value, 0, value, 1, value.length / 3);


    Assert.assertEquals(value, directMemory.get(pointer, value.length));


    directMemory.free(pointer);
  }

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Examples of com.orientechnologies.common.directmemory.ODirectMemory

    directMemory.free(pointer);
  }


  public void testCopyDataOverlapInterval() {
    final Random rnd = new Random();
    ODirectMemory directMemory = new OJNADirectMemory();


    byte[] value = new byte[256];
    rnd.nextBytes(value);


    long pointer = directMemory.allocate(value.length);
    directMemory.set(pointer, value, 0, value.length);


    directMemory.moveData(pointer + 2, pointer + 5, value.length / 3);


    System.arraycopy(value, 2, value, 5, value.length / 3);


    Assert.assertEquals(value, directMemory.get(pointer, value.length));


    directMemory.free(pointer);
  }

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