com.emc.mongoose.api.model.data

Class CachedDataInput

java.lang.Object

com.emc.mongoose.api.model.data.DataInputBase

com.emc.mongoose.api.model.data.CachedDataInput

All Implemented Interfaces:

DataInput, java.io.Closeable, java.io.Externalizable, java.io.Serializable, java.lang.AutoCloseable

Direct Known Subclasses:

ExternalDataInput, SeedDataInput

public class CachedDataInput
extends DataInputBase

Created by andrey on 24.07.17. The data input able to produce the layer of different data using the given layer index. Also caches the layers using the layers count limit to not to exhaust the available memory. The allocated off-heap memory is calculated as layersCacheCountLimit * layerSize (worst case)

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.emc.mongoose.api.model.data.DataInput

DataInput.Type

Field Summary

Fields inherited from class com.emc.mongoose.api.model.data.DataInputBase

inputBuff

Constructor Summary

Constructors

Constructor and Description
CachedDataInput()
CachedDataInput(CachedDataInput other)
CachedDataInput(java.nio.MappedByteBuffer initialLayer, int layersCacheCountLimit)

Method Summary

Modifier and Type	Method and Description
void	close()
java.nio.MappedByteBuffer	getLayer(int layerIndex)
void	readExternal(java.io.ObjectInput in)
java.lang.String	toString()
void	writeExternal(java.io.ObjectOutput out)

Methods inherited from class com.emc.mongoose.api.model.data.DataInputBase

getSize

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.emc.mongoose.api.model.data.DataInput

generateData, getInstance

Constructor Detail

CachedDataInput

public CachedDataInput()

CachedDataInput

public CachedDataInput(java.nio.MappedByteBuffer initialLayer,
                       int layersCacheCountLimit)

CachedDataInput

public CachedDataInput(CachedDataInput other)

Method Detail

getLayer

public final java.nio.MappedByteBuffer getLayer(int layerIndex)
                                         throws java.lang.OutOfMemoryError

Specified by:

getLayer in interface DataInput

Specified by:

getLayer in class DataInputBase

Throws:

java.lang.OutOfMemoryError

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class DataInputBase

Throws:

java.io.IOException

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

Specified by:

writeExternal in interface java.io.Externalizable

Overrides:

writeExternal in class DataInputBase

Throws:

java.io.IOException

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Specified by:

readExternal in interface java.io.Externalizable

Overrides:

readExternal in class DataInputBase

Throws:

java.io.IOException

java.lang.ClassNotFoundException

toString

public final java.lang.String toString()

Overrides:

toString in class java.lang.Object