net.tomp2p.futures

Class FutureRouting

java.lang.Object

net.tomp2p.futures.BaseFutureImpl<FutureRouting>

net.tomp2p.futures.FutureRouting

All Implemented Interfaces:

BaseFuture, Cancel

public class FutureRouting
extends BaseFutureImpl<FutureRouting>

The routing future keeps track of the routing process. This means that the routing future is returned immediately and the routing process starts in the background. There are two ways to wait for the routing process: (1) to use await*, which blocks the current thread and waits for the routing process to complete, or (2) to use addListener*, which will be called when the routing process completes. The listener may or may not run in the same thread. The routing will always succeed if we do DHT operations or bootstrap to ourself. It will fail if we bootstrap to another peer, but could not contact any peer than ourself.

Author:

Thomas Bocek

See Also:

#neighbors(SortedSet, SortedSet, SortedSet, boolean, boolean)

Nested Class Summary

Nested classes/interfaces inherited from interface net.tomp2p.futures.BaseFuture

BaseFuture.FutureType

Field Summary

Fields inherited from class net.tomp2p.futures.BaseFutureImpl

completed, lock, reason, type

Constructor Summary

Constructors

Constructor and Description
FutureRouting()

Method Summary

Methods

Modifier and Type	Method and Description
NavigableSet<PeerAddress>	directHits() The direct hits set contains those peers that reported to have the key (Number160) we were looking for.
SortedMap<PeerAddress,DigestInfo>	directHitsDigest() The direct hits map contains those peers that reported to have the key (Number160) we were looking for including its digest (size of the result set and its xored hashes).
String	failedReason() The default failed reason is Unknown.
void	neighbors(SortedMap<PeerAddress,DigestInfo> directHits, NavigableSet<PeerAddress> potentialHits, SortedSet<PeerAddress> routingPath, boolean isBootstrap, boolean isRoutingToOther) Sets the result of the routing process and finishes the future.
NavigableSet<PeerAddress>	potentialHits() The potential hits set contains those peers that are in the direct hit and that did report to *not* have the key (Number160) we were looking for.
SortedSet<PeerAddress>	routingPath() Returns the peers that have been asked to provide neighbor information.

Methods inherited from class net.tomp2p.futures.BaseFutureImpl

addCancel, addListener, await, await, awaitListeners, awaitListenersUninterruptibly, awaitUninterruptibly, awaitUninterruptibly, cancel, completedAndNotify, failed, failed, failed, failed, failed, isCompleted, isFailed, isSuccess, notifyListeners, removeCancel, removeListener, self, self, type

Methods inherited from class java.lang.Object

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

Constructor Detail

FutureRouting

public FutureRouting()

Method Detail

neighbors

public void neighbors(SortedMap<PeerAddress,DigestInfo> directHits,
             NavigableSet<PeerAddress> potentialHits,
             SortedSet<PeerAddress> routingPath,
             boolean isBootstrap,
             boolean isRoutingToOther)

Sets the result of the routing process and finishes the future. This will notify all listeners. The future will always succeed if we do DHT operations or bootstrap to ourself. It will fail if we bootstrap to another peer, but could not contact any peer than ourself.

Parameters:

directHits - The direct hits, the peers in the direct set that reports to have the key (Number160) we were looking for.

potentialHits - The potential hits, the peers in the direct set and those peers that reports to *not* have the key (Number160) we were looking for.

routingPath - A set of peers that took part in the routing process.

isBootstrap - Whether the future was triggered by the bootstrap process or the a P2P process

isRoutingToOther - Whether routing peers have been specified others than myself.

See Also:

directHits(), directHitsDigest(), potentialHits(), routingPath()

potentialHits

public NavigableSet<PeerAddress> potentialHits()

The potential hits set contains those peers that are in the direct hit and that did report to *not* have the key (Number160) we were looking for. We already check for the content during routing, since we send the information what we are looking for anyway, so a reply if the content exists or not is not very expensive. However, a peer may lie about this.

Returns:

The potential hits, the peers in the direct set and those peers that reports to *not* have the key (Number160) we were looking for.

See Also:

directHits(), directHitsDigest()

directHits

public NavigableSet<PeerAddress> directHits()

The direct hits set contains those peers that reported to have the key (Number160) we were looking for. We already check for the content during routing, since we send the information what we are looking for anyway, so a reply if the content exists or not is not very expensive. However, a peer may lie about this.

Returns:

The direct hits, the peers in the direct set that reports to have the key (Number160) we were looking for.

See Also:

potentialHits(), directHitsDigest()

directHitsDigest

public SortedMap<PeerAddress,DigestInfo> directHitsDigest()

The direct hits map contains those peers that reported to have the key (Number160) we were looking for including its digest (size of the result set and its xored hashes). We already check for the content during routing, since we send the information what we are looking for anyway, so a reply if the content exists or not is not very expensive. However, a peer may lie about this.

Returns:

The direct hits including its digest (size of the result set and its xored hashes), when a peer reports to have the key (Number160) we were looking for.

See Also:

potentialHits(), directHits()

routingPath

public SortedSet<PeerAddress> routingPath()

Returns the peers that have been asked to provide neighbor information. The order is sorted by peers that were close to the target.

Returns:

A set of peers that took part in the routing process.

failedReason

public String failedReason()

Description copied from interface: BaseFuture

The default failed reason is Unknown.

Specified by:

failedReason in interface BaseFuture

Overrides:

failedReason in class BaseFutureImpl<FutureRouting>

Returns:

Returns the reason why a future failed.