org.apache.cassandra.hints

Class ChecksummedDataInput

java.lang.Object

java.io.InputStream

org.apache.cassandra.io.util.AbstractDataInput

org.apache.cassandra.hints.ChecksummedDataInput

All Implemented Interfaces:

java.io.Closeable, java.io.DataInput, java.lang.AutoCloseable, DataInputPlus

public final class ChecksummedDataInput
extends AbstractDataInput

An AbstractDataInput wrapper that calctulates the CRC in place. Useful for HintsReader, for example, where we must verify the CRC, yet don't want to allocate an extra byte array just that purpose. In addition to calculating the CRC, allows to enforce a maximim known size. This is needed so that Mutation.MutationSerializer doesn't blow up the heap when deserializing a corrupted sequence by reading a huge corrupted length of bytes via via ByteBufferUtil.readWithLength(java.io.DataInput).

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.cassandra.io.util.DataInputPlus

DataInputPlus.DataInputStreamPlus

Method Summary

Modifier and Type	Method and Description
int	bytesRemaining()
int	getCrc()
long	getPosition()
long	getPositionLimit()
void	limit(int newLimit)
int	read()
int	read(byte[] buff, int offset, int length)
void	resetCrc()
void	resetLimit()
void	seek(long position)
static ChecksummedDataInput	wrap(AbstractDataInput source)

Methods inherited from class org.apache.cassandra.io.util.AbstractDataInput

readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, skipBytes

Methods inherited from class java.io.InputStream

available, close, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.cassandra.io.util.DataInputPlus

readUnsignedVInt, readVInt

Method Detail

wrap

public static ChecksummedDataInput wrap(AbstractDataInput source)

resetCrc

public void resetCrc()

resetLimit

public void resetLimit()

limit

public void limit(int newLimit)

bytesRemaining

public int bytesRemaining()

getCrc

public int getCrc()

seek

public void seek(long position)
          throws java.io.IOException

Specified by:

seek in class AbstractDataInput

Throws:

java.io.IOException

getPosition

public long getPosition()

Specified by:

getPosition in class AbstractDataInput

getPositionLimit

public long getPositionLimit()

Specified by:

getPositionLimit in class AbstractDataInput

read

public int read()
         throws java.io.IOException

Specified by:

read in class java.io.InputStream

Throws:

java.io.IOException

read

public int read(byte[] buff,
                int offset,
                int length)
         throws java.io.IOException

Overrides:

read in class java.io.InputStream

Throws:

java.io.IOException