org.apache.nifi.remote.codec

Class StandardFlowFileCodec

java.lang.Object

org.apache.nifi.remote.codec.StandardFlowFileCodec

All Implemented Interfaces:

FlowFileCodec, VersionedRemoteResource

public class StandardFlowFileCodec
extends Object
implements FlowFileCodec

Field Summary

Fields

Modifier and Type	Field and Description
static String	DEFAULT_FLOWFILE_PATH
static int	MAX_NUM_ATTRIBUTES
private VersionNegotiator	versionNegotiator

Constructor Summary

Constructors

Constructor and Description
StandardFlowFileCodec()

Method Summary

Modifier and Type	Method and Description
DataPacket	decode(InputStream stream) Decodes the contents of the InputStream, interpreting the data to determine the next DataPacket's attributes and content.
void	encode(DataPacket dataPacket, OutputStream encodedOut) Encodes a DataPacket and its content as a single stream of data and writes that stream to the output.
String	getResourceName()
List<Integer>	getSupportedVersions() Returns a List of all versions that this codec is able to support, in the order that they are preferred by the codec
VersionNegotiator	getVersionNegotiator()
private String	readString(DataInputStream in)
String	toString()
private void	writeString(String val, DataOutputStream out)

Methods inherited from class java.lang.Object

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

Field Detail

MAX_NUM_ATTRIBUTES

public static final int MAX_NUM_ATTRIBUTES

See Also:

Constant Field Values

DEFAULT_FLOWFILE_PATH

public static final String DEFAULT_FLOWFILE_PATH

See Also:

Constant Field Values

versionNegotiator

private final VersionNegotiator versionNegotiator

Constructor Detail

StandardFlowFileCodec

public StandardFlowFileCodec()

Method Detail

encode

public void encode(DataPacket dataPacket,
                   OutputStream encodedOut)
            throws IOException

Description copied from interface: FlowFileCodec

Encodes a DataPacket and its content as a single stream of data and writes that stream to the output.

Specified by:

encode in interface FlowFileCodec

Parameters:

dataPacket - the data to serialize

encodedOut - the stream to write the data to

Throws:

IOException - if there is a communications issue

decode

public DataPacket decode(InputStream stream)
                  throws IOException,
                         ProtocolException

Description copied from interface: FlowFileCodec

Decodes the contents of the InputStream, interpreting the data to determine the next DataPacket's attributes and content.

Specified by:

decode in interface FlowFileCodec

Parameters:

stream - an InputStream containing DataPacket's content and attributes

Returns:

the DataPacket that was created, or null if the stream was out of data

Throws:

IOException - if unable to read stream

ProtocolException - if the input is malformed

writeString

private void writeString(String val,
                         DataOutputStream out)
                  throws IOException

Throws:

IOException

readString

private String readString(DataInputStream in)
                   throws IOException

Throws:

IOException

getSupportedVersions

public List<Integer> getSupportedVersions()

Description copied from interface: FlowFileCodec

Returns a List of all versions that this codec is able to support, in the order that they are preferred by the codec

Specified by:

getSupportedVersions in interface FlowFileCodec

Returns:

all supported versions

getVersionNegotiator

public VersionNegotiator getVersionNegotiator()

Specified by:

getVersionNegotiator in interface VersionedRemoteResource

toString

public String toString()

Overrides:

toString in class Object

getResourceName

public String getResourceName()

Specified by:

getResourceName in interface VersionedRemoteResource