Package org.apache.druid.segment.serde

Class CompressedComplexColumnSerializer<T>

java.lang.Object

org.apache.druid.segment.serde.CompressedComplexColumnSerializer<T>

All Implemented Interfaces:

GenericColumnSerializer<T>, Serializer

public class CompressedComplexColumnSerializer<T>
extends Object
implements GenericColumnSerializer<T>

Field Summary

Fields

Modifier and Type	Field	Description
static final String	FILE_NAME
static final byte	IS_COMPRESSED
static final byte	V0

Constructor Summary

Constructors

Constructor	Description
CompressedComplexColumnSerializer(String name, SegmentWriteOutMedium segmentWriteOutMedium, IndexSpec indexSpec, ObjectStrategy<T> strategy)

Method Summary

Modifier and Type	Method	Description
static GenericColumnSerializer	create(SegmentWriteOutMedium segmentWriteOutMedium, String column, IndexSpec indexSpec, ObjectStrategy objectStrategy)
long	getSerializedSize()	Returns the number of bytes, that this Serializer will write to the output _channel_ (not smoosher) on a Serializer.writeTo(java.nio.channels.WritableByteChannel, org.apache.druid.java.util.common.io.smoosh.FileSmoosher) call.
void	open()
void	serialize(ColumnValueSelector<? extends T> selector)
void	writeTo(WritableByteChannel channel, FileSmoosher smoosher)	Writes the serialized form of this object.

Methods inherited from class java.lang.Object

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

Field Details

IS_COMPRESSED

public static final byte IS_COMPRESSED

See Also:

• Constant Field Values

V0

public static final byte V0

See Also:

• Constant Field Values

FILE_NAME

public static final String FILE_NAME

See Also:

• Constant Field Values

Constructor Details

CompressedComplexColumnSerializer

public CompressedComplexColumnSerializer(String name,
 SegmentWriteOutMedium segmentWriteOutMedium,
 IndexSpec indexSpec,
 ObjectStrategy<T> strategy)

Method Details

create

public static GenericColumnSerializer create(SegmentWriteOutMedium segmentWriteOutMedium,
 String column,
 IndexSpec indexSpec,
 ObjectStrategy objectStrategy)

open

public void open()
          throws IOException

Specified by:

open in interface GenericColumnSerializer<T>

Throws:

IOException

serialize

public void serialize(ColumnValueSelector<? extends T> selector)
               throws IOException

Specified by:

serialize in interface GenericColumnSerializer<T>

Throws:

IOException

getSerializedSize

public long getSerializedSize()
                       throws IOException

Description copied from interface: Serializer

Returns the number of bytes, that this Serializer will write to the output _channel_ (not smoosher) on a Serializer.writeTo(java.nio.channels.WritableByteChannel, org.apache.druid.java.util.common.io.smoosh.FileSmoosher) call.

Specified by:

getSerializedSize in interface Serializer

Throws:

IOException

writeTo

public void writeTo(WritableByteChannel channel,
 FileSmoosher smoosher)
             throws IOException

Description copied from interface: Serializer

Writes the serialized form of this object. The entire object may be written to the provided channel, or the object may be split over the provided channel and files added to the

invalid @link

{@link FileSmoosher],

where additional channels can be created via FileSmoosher.addWithSmooshedWriter(String, long). The latter approach is useful when the serialized form of the object is too large for a single smoosh container. At the time this javadoc was written, the max smoosh container size is limit to the max ByteBuffer size.

Specified by:

writeTo in interface Serializer

Throws:

IOException