Package org.directmemory.memory

Examples of org.directmemory.memory.OffHeapMemoryBuffer

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    logger.info("heap     - free : " + Ram.inMb(Runtime.getRuntime().freeMemory()));
    logger.info("************************************************");
  }

  public void rawInsert(int megabytes, int howMany) {
    OffHeapMemoryBuffer mem = OffHeapMemoryBuffer.createNew(megabytes * 1024 * 1024);
    assertNotNull(mem);
    int size = mem.capacity() / (howMany);
    size -= size / 100 * 1;
    logger.info("payload size=" + size);
    logger.info("entries=" + howMany);

    logger.info("starting...");
   
    long start = System.currentTimeMillis();

    byte[] payload = new byte[size];
    for (int i = 0; i < howMany; i++) {
      mem.store(payload);
    }
   
    logger.info("...done in " + (System.currentTimeMillis() - start) + " msecs.");
    logger.info("---------------------------------");
    dump(mem);
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//  @Rule
  public MethodRule benchmarkRun = new BenchmarkRule();
 
  @Test
  public void smokeTest() {
    OffHeapMemoryBuffer mem = OffHeapMemoryBuffer.createNew(1 * 1024 * 1024);
    logger.info("buffer size=" + mem.capacity());
    assertNotNull(mem);
   
    Random rnd = new Random();
   
    int size = rnd.nextInt(10) * mem.capacity() / 100;
   
    logger.info("size=" + size);
   
    Pointer p = mem.store(new byte[size]);
    assertNotNull(p);
    assertEquals(size,p.end);
    assertEquals(size, mem.used());
    mem.free(p);
    assertEquals(0, mem.used());   
  }
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    test.put(key, (byte) 0);
  }
 
  @Test
  public void aFewEntriesWithRead() {
    OffHeapMemoryBuffer mem = OffHeapMemoryBuffer.createNew(100 * 1024 * 1024);
    logger.info("total capacity=" + Ram.inMb(mem.capacity()));
    assertNotNull(mem);   
    int howMany = 10000;
    logger.info("payload size is variable");
    logger.info("entries=" + howMany);
    String test = "this is a nicely crafted test";
    for (int i = 0; i < howMany; i++) {
      final byte[] payload = (test + " - " + i).getBytes();
      Pointer p = mem.store(payload);
      final byte[] check = mem.retrieve(p);
      assertNotNull(check);
      assertEquals(test + " - " + i, new String(check));
      long crc1 = OffHeapMemoryBuffer.crc32(payload);
      long crc2 = OffHeapMemoryBuffer.crc32(check);
      assertEquals(crc1, crc2);
    }
   
    logger.info("total used=" + Ram.inMb(mem.used()));
  }
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    logger.info("total used=" + Ram.inMb(mem.used()));
  }

  @Test
  public void aFewEntriesWithCheck() {
    OffHeapMemoryBuffer mem = OffHeapMemoryBuffer.createNew(10 * 1024 * 1024);
    logger.info("total capacity=" + Ram.inMb(mem.capacity()));
    assertNotNull(mem);   
    int howMany = 10;
    logger.info("payload size is variable");
    logger.info("entries=" + howMany);
    String test = "this is a nicely crafted test";
    Pointer lastP = null;
    for (int i = 0; i < howMany; i++) {
      byte[] payload = (test + " - " + i).getBytes();
      Pointer p = mem.store(payload);
      logger.info("p.start=" + p.start);
      logger.info("p.end=" + p.end);
      if (lastP != null) {
        assertEquals(lastP.end +1, p.start);
      }
      assertEquals(p.end-p.start, payload.length);
      lastP = p;
      logger.info("---");
    }
   
    logger.info("total used=" + Ram.inMb(mem.used()));
  }
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    logger.info("total used=" + Ram.inMb(mem.used()));
  }
 
  @Test
  public void checkExpiration() throws InterruptedException {
    OffHeapMemoryBuffer mem = OffHeapMemoryBuffer.createNew(10 * 1024 * 1024);
    assertNotNull(mem);
    int size = 400;
    int howMany = 5000;

    logger.info("off-heap capacity=" + Ram.inMb(mem.capacity()));
    logger.info("payload size=" + Ram.inKb(size));
    logger.info("entries=" + howMany);
   
    byte[] payload = new byte[size];
    for (int i = 0; i < howMany; i++) {
      mem.store(payload, 2000);
    }
   
    assertEquals(size*howMany, mem.used());
   
    logger.info("entries with relative expiration=" + (howMany/2));
    for (int i = 0; i < howMany/2; i++) {
      mem.store(payload, 100);
    }
    assertEquals(size*howMany+size*howMany/2, mem.used());

    logger.info("entries with absolute expiration=" + (howMany/2));
    for (int i = 0; i < howMany/2; i++) {
      mem.store(payload, new Date());
    }
    assertEquals(size*howMany*2, mem.used());
    logger.info("total used=" + Ram.inMb(mem.used()));
   
    Thread.sleep(500);
   
    logger.info("calling disposeExpiredAbsolute");
    mem.disposeExpiredAbsolute();
    logger.info("total used=" + Ram.inMb(mem.used()));
    assertEquals(size*howMany+size*howMany/2, mem.used());
   
    logger.info("calling disposeExpiredRelative");
    mem.disposeExpiredRelative();
    logger.info("total used=" + Ram.inMb(mem.used()));
    assertEquals(size*howMany, mem.used());

    Thread.sleep(2000);

    logger.info("calling disposeExpiredRelative again");
    mem.disposeExpiredRelative();
    logger.info("total used=" + Ram.inMb(mem.used()));
    assertEquals(0, mem.used());
   
  }
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Related Classes of org.directmemory.memory.OffHeapMemoryBuffer

  • org.directmemory.memory.test.BaseTests
  • org.directmemory.memory.test.Starter
  • org.josql.Query
  • org.josql.QueryResults
  • java.util.zip.CRC32
  • java.util.zip.Checksum
  • java.nio.ByteBuffer
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