Package org.opendaylight.controller.cluster.messaging

Class AssembledMessageState

java.lang.Object

org.opendaylight.controller.cluster.messaging.AssembledMessageState

All Implemented Interfaces:

AutoCloseable

public class AssembledMessageState
extends Object
implements AutoCloseable

Maintains the state of an assembled message. This class is NOT thread-safe.

Author:

Thomas Pantelis

Constructor Summary

Constructors

Constructor	Description
AssembledMessageState(Identifier identifier, int totalSlices, FileBackedOutputStreamFactory fileBackedStreamFactory, String logContext)	Constructor.

Method Summary

Modifier and Type	Method	Description
boolean	addSlice(int sliceIndex, byte[] data, int lastSliceHashCode)	Adds a slice to the assembled stream.
void	close()
ByteSource	getAssembledBytes()	Returns the assembled bytes as a ByteSource.
Identifier	getIdentifier()	Returns the identifier of this instance.

Methods inherited from class java.lang.Object

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

Constructor Details

AssembledMessageState

public AssembledMessageState(Identifier identifier,
 int totalSlices,
 FileBackedOutputStreamFactory fileBackedStreamFactory,
 String logContext)

Constructor.

Parameters:

identifier - the identifier for this instance

totalSlices - the total number of slices to expect

fileBackedStreamFactory - factory for creating the FileBackedOutputStream instance used for streaming

logContext - the context for log messages

Method Details

getIdentifier

public Identifier getIdentifier()

Returns the identifier of this instance.

Returns:

the identifier

addSlice

public boolean addSlice(int sliceIndex,
 byte[] data,
 int lastSliceHashCode)
                 throws MessageSliceException

Adds a slice to the assembled stream.

Parameters:

sliceIndex - the index of the slice

data - the sliced data

lastSliceHashCode - the hash code of the last slice sent

Returns:

true if this is the last slice received, false otherwise

Throws:

MessageSliceException -

• if the slice index is invalid
• if the last slice hash code is invalid
• if an error occurs writing the data to the stream

In addition, this instance is automatically closed and can no longer be used.

AssemblerSealedException - if this instance is already sealed (ie has received all the slices)

AssemblerClosedException - if this instance is already closed

getAssembledBytes

public ByteSource getAssembledBytes()
                             throws IOException

Returns the assembled bytes as a ByteSource. This method must only be called after this instance is sealed.

Returns:

a ByteSource containing the assembled bytes

Throws:

IOException - if an error occurs obtaining the assembled bytes

IllegalStateException - is this instance is not sealed

close

public void close()

Specified by:

close in interface AutoCloseable