net.tomp2p.dht

Class DistributedHashTable

java.lang.Object

net.tomp2p.dht.DistributedHashTable

public class DistributedHashTable
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static int	REASON_CANCEL
static int	REASON_UNKOWN

Constructor Summary

Constructors

Constructor and Description
DistributedHashTable(DistributedRouting routing, StorageRPC storeRCP, DirectDataRPC directDataRPC)

Method Summary

Methods

Modifier and Type	Method and Description
FuturePut	add(AddBuilder builder)
static RequestP2PConfiguration	adjustConfiguration(RequestP2PConfiguration p2pConfiguration, int size) Adjusts the number of minimum requests in the P2P configuration.
FutureDigest	digest(DigestBuilder builder)
FutureSend	direct(SendBuilder builder)
FutureGet	get(GetBuilder builder)
static <K extends FutureDHT<?>> K	parallelRequests(RequestP2PConfiguration p2pConfiguration, NavigableSet<PeerAddress> directHit, NavigableSet<PeerAddress> potentialHit, boolean cancleOnFinish, FutureChannelCreator futureChannelCreator, OperationMapper<K> operation, K futureDHT) Creates RPCs and executes them parallel.
FuturePut	put(PutBuilder putBuilder)
FutureRemove	remove(RemoveBuilder builder)

Methods inherited from class java.lang.Object

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

Field Detail

REASON_CANCEL

public static final int REASON_CANCEL

See Also:

Constant Field Values

REASON_UNKOWN

public static final int REASON_UNKOWN

See Also:

Constant Field Values

Constructor Detail

DistributedHashTable

public DistributedHashTable(DistributedRouting routing,
                    StorageRPC storeRCP,
                    DirectDataRPC directDataRPC)

Method Detail

add

public FuturePut add(AddBuilder builder)

direct

public FutureSend direct(SendBuilder builder)

put

public FuturePut put(PutBuilder putBuilder)

get

public FutureGet get(GetBuilder builder)

digest

public FutureDigest digest(DigestBuilder builder)

remove

public FutureRemove remove(RemoveBuilder builder)

parallelRequests

public static <K extends FutureDHT<?>> K parallelRequests(RequestP2PConfiguration p2pConfiguration,
                                          NavigableSet<PeerAddress> directHit,
                                          NavigableSet<PeerAddress> potentialHit,
                                          boolean cancleOnFinish,
                                          FutureChannelCreator futureChannelCreator,
                                          OperationMapper<K> operation,
                                          K futureDHT)

Creates RPCs and executes them parallel.

Parameters:

p2pConfiguration - The configuration that specifies e.g. how many parallel requests there are.

queue - The sorted set that will be queries. The first RPC takes the first in the queue.

futureDHT - The future object that tracks the progress

cancleOnFinish - Set to true if the operation should be canceled (e.g. file transfer) if the future has finished.

operation - The operation that creates the request

adjustConfiguration

public static RequestP2PConfiguration adjustConfiguration(RequestP2PConfiguration p2pConfiguration,
                                          int size)

Adjusts the number of minimum requests in the P2P configuration. When we query x peers for the get() operation and they have y different data stored (y <= x), then set the minimum to y or to the value the user set if its smaller. If no data is found, then return 0, so we don't start P2P RPCs.

Parameters:

p2pConfiguration - The old P2P configuration with the user specified minimum result

directHitsDigest - The digest information from the routing process

Returns:

The new RequestP2PConfiguration with the new minimum result