Examples of etch.util.core.nio.ByteBufferPool.alloc()

etch.util.core.nio.ByteBufferPool.alloc()
Allocates a buffer from the pool. @param notify object to be notified when a buffer is released into thepool. @return a buffer from the pool or null if the pool is empty and notify isnot null. @throws IOException the pool is empty and notify is null.

  /** @throws Exception */
  @Test
  public void alloc1() throws Exception
  {
    ByteBufferPool p = new ByteBufferPool( 4096, 0, 10, 0, 0 );
    ByteBuffer b = p.alloc( null );
    assertNotNull( b );
    assertEquals( 4096, b.limit() );
    assertEquals( 1, p.used() );
    p.release( b );
    assertEquals( 0, p.used() );

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  /** @throws Exception */
  @Test
  public void alloc2() throws Exception
  {
    ByteBufferPool p = new ByteBufferPool( 1024, 0, 10, 0, 0 );
    ByteBuffer b = p.alloc( null );
    assertNotNull( b );
    assertEquals( 1024, b.limit() );
    assertEquals( 1, p.used() );
    p.release( b );
    assertEquals( 0, p.used() );

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  /** @throws Exception */
  @Test
  public void alloc3() throws Exception
  {
    ByteBufferPool p = new ByteBufferPool( 4096, 0, 10, 0, 0 );
    ByteBuffer[] b = p.alloc( null, 2 );
    assertNotNull( b );
    assertEquals( 2, b.length );
    assertNotNull( b[0] );
    assertEquals( 4096, b[0].limit() );
    assertNotNull( b[1] );

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  @Test( expected = IOException.class )
  public void alloc4() throws Exception
  {
    // out of buffers
    ByteBufferPool p = new ByteBufferPool( 1024, 0, 1, 0, 0 );
    p.alloc( null );
    p.alloc( null );
  }
  
  /** @throws Exception */
  @Test

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  public void alloc4() throws Exception
  {
    // out of buffers
    ByteBufferPool p = new ByteBufferPool( 1024, 0, 1, 0, 0 );
    p.alloc( null );
    p.alloc( null );
  }
  
  /** @throws Exception */
  @Test
  public void alloc5() throws Exception

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  public void alloc5() throws Exception
  {
    // slower because of no pooling.
    ByteBufferPool p = new ByteBufferPool( 1024, 0, 1, 0, 0 );
    for (int i = 0; i < 100000; i++)
      p.release( p.alloc( null ) );
    assertEquals( 0, p.used() );
  }
  
  /** @throws Exception */
  @Test

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  public void alloc6() throws Exception
  {
    // faster because of pooling.
    ByteBufferPool p = new ByteBufferPool( 1024, 1, 1, 0, 0 );
    for (int i = 0; i < 100000; i++)
      p.release( p.alloc( null ) );
    assertEquals( 0, p.used() );
  }
  
  /** @throws Exception */
  @Test

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  {
    ByteBufferPool p = new ByteBufferPool( 1024, 1, 1, 0, 0 );
    MyNotify n1 = new MyNotify();
    MyNotify n2 = new MyNotify();
    
    ByteBuffer b1 = p.alloc( n1 );
    assertNotNull( b1 );
    assertEquals( 1, p.used() );
    Thread.sleep( 15 );
    assertFalse( n1.available );
    assertFalse( n2.available );

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    assertEquals( 1, p.used() );
    Thread.sleep( 15 );
    assertFalse( n1.available );
    assertFalse( n2.available );
    
    ByteBuffer b2 = p.alloc( n2 );
    assertNull( b2 );
    assertEquals( 1, p.used() );
    Thread.sleep( 15 );
    assertFalse( n1.available );
    assertFalse( n2.available );

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    Thread.sleep( 15 );
    assertFalse( n1.available );
    assertTrue( n2.available );
    
    n2.available = false;
    b2 = p.alloc( n2 );
    assertNotNull( b2 );
    assertEquals( 1, p.used() );
    Thread.sleep( 15 );
    assertFalse( n1.available );
    assertFalse( n2.available );

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