Examples of com.google.code.yanf4j.buffer.IoBuffer

com.google.code.yanf4j.buffer.IoBuffer
cate heap buffer by default. IoBuffer.setUseDirectBuffer(false); // A new heap buffer is returned. IoBuffer buf = IoBuffer.allocate(1024);

Wrapping existing NIO buffers and arrays

This class provides a few wrap(...) methods that wraps any NIO buffers and byte arrays.
AutoExpand

Writing variable-length data using NIO ByteBuffers is not really easy, and it is because its size is fixed. {@link IoBuffer} introducesautoExpand property. If autoExpand property is true, you never get {@link BufferOverflowException} or{@link IndexOutOfBoundsException} (except when index is negative). Itautomatically expands its capacity and limit value. For example:
```
 String greeting = messageBundle.getMessage("hello"); IoBuffer buf = IoBuffer.allocate(16); // Turn on autoExpand (it is off by default) buf.setAutoExpand(true); buf.putString(greeting, utf8encoder); 
```
The underlying {@link ByteBuffer} is reallocated by {@link IoBuffer} behindthe scene if the encoded data is larger than 16 bytes in the example above. Its capacity will double, and its limit will increase to the last position the string is written.

AutoShrink

You might also want to decrease the capacity of the buffer when most of the allocated memory area is not being used. {@link IoBuffer} providesautoShrink property to take care of this issue. If autoShrink is turned on, {@link IoBuffer} halves the capacity of thebuffer when {@link #compact()} is invoked and only 1/4 or less of the currentcapacity is being used.
You can also {@link #shrink()} method manually to shrink the capacity of thebuffer.
The underlying {@link ByteBuffer} is reallocated by {@link IoBuffer} behindthe scene, and therefore {@link #buf()} will return a different{@link ByteBuffer} instance once capacity changes. Please also note{@link #compact()} or {@link #shrink()} will not decrease the capacity if thenew capacity is less than the {@link #minimumCapacity()} of the buffer.
Derived Buffers

Derived buffers are the buffers which were created by {@link #duplicate()}, {@link #slice()}, or {@link #asReadOnlyBuffer()}. They are useful especially when you broadcast the same messages to multiple {@link IoSession}s. Please note that the buffer derived from and its derived buffers are not both auto-expandable neither auto-shrinkable. Trying to call {@link #setAutoExpand(boolean)} or {@link #setAutoShrink(boolean)} withtrue parameter will raise an {@link IllegalStateException}.

Changing Buffer Allocation Policy

{@link IoBufferAllocator} interface lets you override the default buffermanagement behavior. There are two allocators provided out-of-the-box:
- {@link SimpleBufferAllocator} (default)
- {@link CachedBufferAllocator}
You can implement your own allocator and use it by calling {@link #setAllocator(IoBufferAllocator)}.
@author The Apache MINA Project (dev@mina.apache.org) @version $Rev: 748525 $, $Date: 2009-02-27 14:45:31 +0100 (Fri, 27 Feb 2009)$

    }




    @Test
    public void testGetEnumSet() {
        IoBuffer buf = IoBuffer.allocate(8);


        // Test empty set
        buf.put((byte) 0);
        buf.flip();
        assertEquals(EnumSet.noneOf(TestEnum.class), buf.getEnumSet(TestEnum.class));


        buf.clear();
        buf.putShort((short) 0);
        buf.flip();
        assertEquals(EnumSet.noneOf(TestEnum.class), buf.getEnumSet(TestEnum.class));


        buf.clear();
        buf.putInt(0);
        buf.flip();
        assertEquals(EnumSet.noneOf(TestEnum.class), buf.getEnumSet(TestEnum.class));


        buf.clear();
        buf.putLong(0L);
        buf.flip();
        assertEquals(EnumSet.noneOf(TestEnum.class), buf.getEnumSet(TestEnum.class));


        // Test complete set
        buf.clear();
        buf.put((byte) -1);
        buf.flip();
        assertEquals(EnumSet.range(TestEnum.E1, TestEnum.E8), buf.getEnumSet(TestEnum.class));


        buf.clear();
        buf.putShort((short) -1);
        buf.flip();
        assertEquals(EnumSet.range(TestEnum.E1, TestEnum.E16), buf.getEnumSetShort(TestEnum.class));


        buf.clear();
        buf.putInt(-1);
        buf.flip();
        assertEquals(EnumSet.range(TestEnum.E1, TestEnum.E32), buf.getEnumSetInt(TestEnum.class));


        buf.clear();
        buf.putLong(-1L);
        buf.flip();
        assertEquals(EnumSet.allOf(TestEnum.class), buf.getEnumSetLong(TestEnum.class));


        // Test high bit set
        buf.clear();
        buf.put(Byte.MIN_VALUE);
        buf.flip();
        assertEquals(EnumSet.of(TestEnum.E8), buf.getEnumSet(TestEnum.class));


        buf.clear();
        buf.putShort(Short.MIN_VALUE);
        buf.flip();
        assertEquals(EnumSet.of(TestEnum.E16), buf.getEnumSetShort(TestEnum.class));


        buf.clear();
        buf.putInt(Integer.MIN_VALUE);
        buf.flip();
        assertEquals(EnumSet.of(TestEnum.E32), buf.getEnumSetInt(TestEnum.class));


        buf.clear();
        buf.putLong(Long.MIN_VALUE);
        buf.flip();
        assertEquals(EnumSet.of(TestEnum.E64), buf.getEnumSetLong(TestEnum.class));


        // Test high low bits set
        buf.clear();
        byte b = Byte.MIN_VALUE + 1;
        buf.put(b);
        buf.flip();
        assertEquals(EnumSet.of(TestEnum.E1, TestEnum.E8), buf.getEnumSet(TestEnum.class));


        buf.clear();
        short s = Short.MIN_VALUE + 1;
        buf.putShort(s);
        buf.flip();
        assertEquals(EnumSet.of(TestEnum.E1, TestEnum.E16), buf.getEnumSetShort(TestEnum.class));


        buf.clear();
        buf.putInt(Integer.MIN_VALUE + 1);
        buf.flip();
        assertEquals(EnumSet.of(TestEnum.E1, TestEnum.E32), buf.getEnumSetInt(TestEnum.class));


        buf.clear();
        buf.putLong(Long.MIN_VALUE + 1);
        buf.flip();
        assertEquals(EnumSet.of(TestEnum.E1, TestEnum.E64), buf.getEnumSetLong(TestEnum.class));
    }

View Full Code Here


    @Test
    public void testEncodeNormal() throws Exception {
        Encoder encoder = this.textLineCodecFactory.getEncoder();
        Assert.assertNotNull(encoder);
        IoBuffer buffer = encoder.encode("hello", null);
        Assert.assertNotNull(buffer);
        Assert.assertTrue(buffer.hasRemaining());
        Assert.assertArrayEquals("hello\r\n".getBytes("utf-8"), buffer.array());


    }

View Full Code Here


    @Test
    public void decodeNormal() throws Exception {
        Encoder encoder = this.textLineCodecFactory.getEncoder();
        Assert.assertNotNull(encoder);
        IoBuffer buffer = encoder.encode("hello", null);


        String str = (String) this.textLineCodecFactory.getDecoder().decode(buffer, null);
        Assert.assertEquals("hello", str);
    }

View Full Code Here




    @Test
    public void testGetStringWithFailure() throws Exception {
        String test = "\u30b3\u30e1\u30f3\u30c8\u7de8\u96c6";
        IoBuffer buffer = IoBuffer.wrap(test.getBytes("Shift_JIS"));


        // Make sure the limit doesn't change when an exception arose.
        int oldLimit = buffer.limit();
        int oldPos = buffer.position();
        try {
            buffer.getString(3, Charset.forName("ASCII").newDecoder());
            fail();
        }
        catch (Exception e) {
            assertEquals(oldLimit, buffer.limit());
            assertEquals(oldPos, buffer.position());
        }


        try {
            buffer.getString(Charset.forName("ASCII").newDecoder());
            fail();
        }
        catch (Exception e) {
            assertEquals(oldLimit, buffer.limit());
            assertEquals(oldPos, buffer.position());
        }
    }

View Full Code Here




    @Test
    public void testPutString() throws Exception {
        CharsetEncoder encoder;
        IoBuffer buf = IoBuffer.allocate(16);
        encoder = Charset.forName("ISO-8859-1").newEncoder();


        buf.putString("ABC", encoder);
        assertEquals(3, buf.position());
        buf.clear();
        assertEquals('A', buf.get(0));
        assertEquals('B', buf.get(1));
        assertEquals('C', buf.get(2));


        buf.putString("D", 5, encoder);
        assertEquals(5, buf.position());
        buf.clear();
        assertEquals('D', buf.get(0));
        assertEquals(0, buf.get(1));


        buf.putString("EFG", 2, encoder);
        assertEquals(2, buf.position());
        buf.clear();
        assertEquals('E', buf.get(0));
        assertEquals('F', buf.get(1));
        assertEquals('C', buf.get(2)); // C may not be overwritten


        // UTF-16: We specify byte order to omit BOM.
        encoder = Charset.forName("UTF-16BE").newEncoder();
        buf.clear();


        buf.putString("ABC", encoder);
        assertEquals(6, buf.position());
        buf.clear();


        assertEquals(0, buf.get(0));
        assertEquals('A', buf.get(1));
        assertEquals(0, buf.get(2));
        assertEquals('B', buf.get(3));
        assertEquals(0, buf.get(4));
        assertEquals('C', buf.get(5));


        buf.putString("D", 10, encoder);
        assertEquals(10, buf.position());
        buf.clear();
        assertEquals(0, buf.get(0));
        assertEquals('D', buf.get(1));
        assertEquals(0, buf.get(2));
        assertEquals(0, buf.get(3));


        buf.putString("EFG", 4, encoder);
        assertEquals(4, buf.position());
        buf.clear();
        assertEquals(0, buf.get(0));
        assertEquals('E', buf.get(1));
        assertEquals(0, buf.get(2));
        assertEquals('F', buf.get(3));
        assertEquals(0, buf.get(4)); // C may not be overwritten
        assertEquals('C', buf.get(5)); // C may not be overwritten


        // Test putting an emptry string
        buf.putString("", encoder);
        assertEquals(0, buf.position());
        buf.putString("", 4, encoder);
        assertEquals(4, buf.position());
        assertEquals(0, buf.get(0));
        assertEquals(0, buf.get(1));
    }

View Full Code Here

    }




    @Test
    public void testBitVectorOverFlow() {
        IoBuffer buf = IoBuffer.allocate(8);
        try {
            buf.putEnumSet(EnumSet.of(TestEnum.E9));
            fail("Should have thrown IllegalArgumentException");
        }
        catch (IllegalArgumentException e) {
            // Expected an Exception, signifies test success
            assertTrue(true);
        }


        try {
            buf.putEnumSetShort(EnumSet.of(TestEnum.E17));
            fail("Should have thrown IllegalArgumentException");
        }
        catch (IllegalArgumentException e) {
            // Expected an Exception, signifies test success
            assertTrue(true);
        }


        try {
            buf.putEnumSetInt(EnumSet.of(TestEnum.E33));
            fail("Should have thrown IllegalArgumentException");
        }
        catch (IllegalArgumentException e) {
            // Expected an Exception, signifies test success
            assertTrue(true);
        }


        try {
            buf.putEnumSetLong(EnumSet.of(TooBigEnum.E65));
            fail("Should have thrown IllegalArgumentException");
        }
        catch (IllegalArgumentException e) {
            // Expected an Exception, signifies test success
            assertTrue(true);

View Full Code Here

    }




    @Test
    public void testGetPutEnum() {
        IoBuffer buf = IoBuffer.allocate(4);


        buf.putEnum(TestEnum.E64);
        buf.flip();
        assertEquals(TestEnum.E64, buf.getEnum(TestEnum.class));


        buf.clear();
        buf.putEnumShort(TestEnum.E64);
        buf.flip();
        assertEquals(TestEnum.E64, buf.getEnumShort(TestEnum.class));


        buf.clear();
        buf.putEnumInt(TestEnum.E64);
        buf.flip();
        assertEquals(TestEnum.E64, buf.getEnumInt(TestEnum.class));
    }

View Full Code Here

    }




    @Test
    public void testGetMediumInt() {
        IoBuffer buf = IoBuffer.allocate(3);


        buf.put((byte) 0x01);
        buf.put((byte) 0x02);
        buf.put((byte) 0x03);
        assertEquals(3, buf.position());


        buf.flip();
        assertEquals(0x010203, buf.getMediumInt());
        assertEquals(0x010203, buf.getMediumInt(0));
        buf.flip();
        assertEquals(0x010203, buf.getUnsignedMediumInt());
        assertEquals(0x010203, buf.getUnsignedMediumInt(0));
        buf.flip();
        assertEquals(0x010203, buf.getUnsignedMediumInt());
        buf.flip().order(ByteOrder.LITTLE_ENDIAN);
        assertEquals(0x030201, buf.getMediumInt());
        assertEquals(0x030201, buf.getMediumInt(0));


        // Test max medium int
        buf.flip().order(ByteOrder.BIG_ENDIAN);
        buf.put((byte) 0x7f);
        buf.put((byte) 0xff);
        buf.put((byte) 0xff);
        buf.flip();
        assertEquals(0x7fffff, buf.getMediumInt());
        assertEquals(0x7fffff, buf.getMediumInt(0));


        // Test negative number
        buf.flip().order(ByteOrder.BIG_ENDIAN);
        buf.put((byte) 0xff);
        buf.put((byte) 0x02);
        buf.put((byte) 0x03);
        buf.flip();


        assertEquals(0xffff0203, buf.getMediumInt());
        assertEquals(0xffff0203, buf.getMediumInt(0));
        buf.flip();


        assertEquals(0x00ff0203, buf.getUnsignedMediumInt());
        assertEquals(0x00ff0203, buf.getUnsignedMediumInt(0));
    }

View Full Code Here

    }




    @Test
    public void testPutMediumInt() {
        IoBuffer buf = IoBuffer.allocate(3);


        checkMediumInt(buf, 0);
        checkMediumInt(buf, 1);
        checkMediumInt(buf, -1);
        checkMediumInt(buf, 0x7fffff);

View Full Code Here

            if (msg == null) {
                return null;
            }
            String message = (String) msg;
            ByteBuffer buff = TextLineCodecFactory.this.charset.encode(message);
            IoBuffer resultBuffer = IoBuffer.allocate(buff.remaining() + SPLIT.remaining());
            resultBuffer.put(buff);
            resultBuffer.put(SPLIT.slice());
            resultBuffer.flip();
            return resultBuffer;
        }

View Full Code Here

0 1 2 3 4

TOP

Related Classes of com.google.code.yanf4j.buffer.IoBuffer

com.google.code.yanf4j.core.impl.ByteBufferCodecFactory$ByteBufferDecoder

com.google.code.yanf4j.core.impl.ByteBufferCodecFactory$ByteBufferEncoder

com.google.code.yanf4j.core.impl.TextLineCodecFactory$StringEncoder

com.google.code.yanf4j.nio.impl.NioTCPSession

com.google.code.yanf4j.test.unittest.buffer.IoBufferTest

com.google.code.yanf4j.test.unittest.core.impl.ByteBufferCodecFactoryUnitTest

com.google.code.yanf4j.test.unittest.core.impl.TextLineCodecFactoryUnitTest

net.rubyeye.xmemcached.command.BinaryCommandFactory

net.rubyeye.xmemcached.test.unittest.codec.MemcachedEncoderUnitTest

net.rubyeye.xmemcached.XMemcachedClient

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.

Examples of com.google.code.yanf4j.buffer.IoBuffer

Wrapping existing NIO buffers and arrays

AutoExpand

AutoShrink

Derived Buffers

Changing Buffer Allocation Policy

Related Classes of com.google.code.yanf4j.buffer.IoBuffer