org.apache.nifi.remote

Class PeerDescriptionModifier

java.lang.Object

org.apache.nifi.remote.PeerDescriptionModifier

public class PeerDescriptionModifier
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	PeerDescriptionModifier.RequestType
private static class	PeerDescriptionModifier.Route

Field Summary

Fields

Modifier and Type	Field and Description
private static org.slf4j.Logger	logger
private static String	PROPERTY_PREFIX
private static Pattern	PROPERTY_REGEX
private Map<SiteToSiteTransportProtocol,List<PeerDescriptionModifier.Route>>	routes

Constructor Summary

Constructors

Constructor and Description
PeerDescriptionModifier(NiFiProperties properties)

Method Summary

Modifier and Type	Method and Description
private void	addVariables(Map<String,String> map, String prefix, PeerDescription peer)
boolean	isModificationNeeded(SiteToSiteTransportProtocol protocol)
PeerDescription	modify(PeerDescription source, PeerDescription target, SiteToSiteTransportProtocol protocol, PeerDescriptionModifier.RequestType requestType, Map<String,String> variables) Modifies target peer description so that subsequent request can go through the appropriate route

Methods inherited from class java.lang.Object

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

Field Detail

logger

private static final org.slf4j.Logger logger

routes

private Map<SiteToSiteTransportProtocol,List<PeerDescriptionModifier.Route>> routes

PROPERTY_PREFIX

private static final String PROPERTY_PREFIX

See Also:

Constant Field Values

PROPERTY_REGEX

private static final Pattern PROPERTY_REGEX

Constructor Detail

PeerDescriptionModifier

public PeerDescriptionModifier(NiFiProperties properties)

Method Detail

addVariables

private void addVariables(Map<String,String> map,
                          String prefix,
                          PeerDescription peer)

isModificationNeeded

public boolean isModificationNeeded(SiteToSiteTransportProtocol protocol)

modify

public PeerDescription modify(PeerDescription source,
                              PeerDescription target,
                              SiteToSiteTransportProtocol protocol,
                              PeerDescriptionModifier.RequestType requestType,
                              Map<String,String> variables)

Modifies target peer description so that subsequent request can go through the appropriate route

Parameters:

source - The source peer from which a request was sent, this can be any server host participated to relay the request, but should be the one which can contribute to derive the correct target peer.

target - The original target which should receive and process further incoming requests.

protocol - The S2S protocol being used.

requestType - The requested API type.

variables - Containing context variables those can be referred from Expression Language.

Returns:

A peer description. The original target peer can be returned if there is no intermediate peer such as reverse proxies needed.