org.apache.nifi.distributed.cache.protocol

Class ProtocolHandshake

java.lang.Object

org.apache.nifi.distributed.cache.protocol.ProtocolHandshake

public class ProtocolHandshake
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static int	ABORT
static int	DIFFERENT_RESOURCE_VERSION
static byte[]	MAGIC_HEADER
static int	RESOURCE_OK

Constructor Summary

Constructors

Constructor and Description
ProtocolHandshake()

Method Summary

Modifier and Type	Method and Description
static void	initiateHandshake(InputStream in, OutputStream out, VersionNegotiator versionNegotiator) Initiate handshake to ensure client and server can communicate with the same protocol.
private static void	initiateVersionNegotiation(VersionNegotiator negotiator, DataInputStream dis, DataOutputStream dos)
static void	receiveHandshake(InputStream in, OutputStream out, VersionNegotiator versionNegotiator)
private static void	receiveVersionNegotiation(VersionNegotiator negotiator, DataInputStream dis, DataOutputStream dos)

Methods inherited from class java.lang.Object

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

Field Detail

MAGIC_HEADER

public static final byte[] MAGIC_HEADER

RESOURCE_OK

public static final int RESOURCE_OK

See Also:

Constant Field Values

DIFFERENT_RESOURCE_VERSION

public static final int DIFFERENT_RESOURCE_VERSION

See Also:

Constant Field Values

ABORT

public static final int ABORT

See Also:

Constant Field Values

Constructor Detail

ProtocolHandshake

public ProtocolHandshake()

Method Detail

initiateHandshake

public static void initiateHandshake(InputStream in,
                                     OutputStream out,
                                     VersionNegotiator versionNegotiator)
                              throws IOException,
                                     HandshakeException

Initiate handshake to ensure client and server can communicate with the same protocol. If the server doesn't support requested protocol version, HandshakeException will be thrown.

DistributedMapCache version histories:

• 3: Added subMap, keySet, removeAndGet, removeByPatternAndGet methods.
• 2: Added atomic update operations (fetch and replace) using optimistic lock with revision number.
• 1: Initial version.

DistributedSetCache version histories:

• 1: Initial version.

Throws:

IOException

HandshakeException

receiveHandshake

public static void receiveHandshake(InputStream in,
                                    OutputStream out,
                                    VersionNegotiator versionNegotiator)
                             throws IOException,
                                    HandshakeException

Throws:

IOException

HandshakeException

initiateVersionNegotiation

private static void initiateVersionNegotiation(VersionNegotiator negotiator,
                                               DataInputStream dis,
                                               DataOutputStream dos)
                                        throws IOException,
                                               HandshakeException

Throws:

IOException

HandshakeException

receiveVersionNegotiation

private static void receiveVersionNegotiation(VersionNegotiator negotiator,
                                              DataInputStream dis,
                                              DataOutputStream dos)
                                       throws IOException,
                                              HandshakeException

Throws:

IOException

HandshakeException