Package de.zib.scalaris

Class FixedNodeConnectionPolicy

java.lang.Object

de.zib.scalaris.ConnectionPolicy

de.zib.scalaris.FixedNodeConnectionPolicy

public class FixedNodeConnectionPolicy
extends ConnectionPolicy

Implements a ConnectionPolicy which only supports a single node and does not issue automatic re-tries.

Since:

3.10

Version:

3.10

Author:

Nico Kruber, kruber@zib.de

See Also:

DefaultConnectionPolicy

Constructor Summary

Constructors

Constructor	Description
FixedNodeConnectionPolicy(PeerNode remoteNode)	Creates a new connection policy working with the given remote node.
FixedNodeConnectionPolicy(java.lang.String remoteNode)	Creates a new connection policy working with the given remote node.

Method Summary

Modifier and Type	Method	Description
<E extends java.lang.Exception> PeerNode	selectNode(int retry, PeerNode failedNode, E e)	Selects the node to (re-)connect with.

Methods inherited from class de.zib.scalaris.ConnectionPolicy

availableNodeAdded, availableNodeRemoved, availableNodesReset, nodeConnectSuccess, nodeFailed, nodeFailReset, selectNode

Methods inherited from class java.lang.Object

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

Constructor Detail

FixedNodeConnectionPolicy

public FixedNodeConnectionPolicy(PeerNode remoteNode)

Creates a new connection policy working with the given remote node.

Parameters:

remoteNode - the (only) available remote node

FixedNodeConnectionPolicy

public FixedNodeConnectionPolicy(java.lang.String remoteNode)

Creates a new connection policy working with the given remote node.

Parameters:

remoteNode - the (only) available remote node

Method Detail

selectNode

public <E extends java.lang.Exception> PeerNode selectNode(int retry,
                                                           PeerNode failedNode,
                                                           E e)
                                                    throws E extends java.lang.Exception,
                                                           java.lang.UnsupportedOperationException

Description copied from class: ConnectionPolicy

Selects the node to (re-)connect with. If no re-connection is desired, throw an exception!

Specified by:

selectNode in class ConnectionPolicy

Type Parameters:

E - the type of the exception that came from the failed connection and may be re-thrown

Parameters:

retry - the n'th retry (initial connect = 0, 1st reconnect = 1,...)

failedNode - the node from the previous connection attempt or null

e - the exception that came back from the previous connection attempt or null

Returns:

the new node to connect with

Throws:

E - if thrown, automatic re-connection attempts will stop

java.lang.UnsupportedOperationException - is thrown if the operation can not be performed, e.g. the list is empty

E extends java.lang.Exception

See Also:

Connection.connect(), Connection.doRPC(String, String, com.ericsson.otp.erlang.OtpErlangList), Connection.doRPC(String, String, com.ericsson.otp.erlang.OtpErlangObject[])