/*
* Mojito Distributed Hash Table (Mojito DHT)
* Copyright (C) 2006-2007 LimeWire LLC
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.limewire.mojito.messages;
import java.math.BigInteger;
import java.net.SocketAddress;
import java.util.Collection;
import org.limewire.mojito.Context;
import org.limewire.mojito.KUID;
import org.limewire.mojito.db.DHTValueEntity;
import org.limewire.mojito.db.DHTValueType;
import org.limewire.mojito.messages.StatsRequest.StatisticType;
import org.limewire.mojito.messages.StoreResponse.StoreStatusCode;
import org.limewire.mojito.messages.impl.DefaultMessageFactory;
import org.limewire.mojito.routing.Contact;
import org.limewire.security.SecurityToken;
/**
* The MessageHelper class simplifies the construction of DHTMessages.
* Except for some rare cases you want to use the MessageHelper instead of
* the MessageFactory
*/
public class MessageHelper {
protected final Context context;
private MessageFactory factory;
public MessageHelper(Context context) {
this.context = context;
factory = new DefaultMessageFactory(context);
}
public void setMessageFactory(MessageFactory factory) {
if (factory == null) {
factory = new DefaultMessageFactory(context);
}
this.factory = factory;
}
public MessageFactory getMessageFactory() {
return factory;
}
protected Contact getLocalNode() {
return context.getLocalNode();
}
protected BigInteger getEstimatedSize() {
return context.size();
}
public PingRequest createPingRequest(SocketAddress dst) {
return factory.createPingRequest(getLocalNode(), dst);
}
public PingResponse createPingResponse(RequestMessage request, SocketAddress externalAddress) {
if (context.getContactAddress().equals(externalAddress)) {
throw new IllegalArgumentException("Cannot tell other Node that its external address is the same as yours!");
}
return factory.createPingResponse(getLocalNode(), request.getContact(),
request.getMessageID(), externalAddress, getEstimatedSize());
}
public FindNodeRequest createFindNodeRequest(SocketAddress dst, KUID lookupId) {
return factory.createFindNodeRequest(getLocalNode(), dst, lookupId);
}
public FindNodeResponse createFindNodeResponse(RequestMessage request,
Collection<? extends Contact> nodes) {
return factory.createFindNodeResponse(getLocalNode(), request.getContact(),
request.getMessageID(), nodes);
}
public FindValueRequest createFindValueRequest(SocketAddress dst, KUID lookupId,
Collection<KUID> keys, DHTValueType valueType) {
return factory.createFindValueRequest(getLocalNode(), dst, lookupId, keys, valueType);
}
public FindValueResponse createFindValueResponse(RequestMessage request,
float requestLoad, Collection<? extends DHTValueEntity> values, Collection<KUID> keys) {
return factory.createFindValueResponse(getLocalNode(), request.getContact(),
request.getMessageID(), requestLoad, values, keys);
}
public StoreRequest createStoreRequest(SocketAddress dst, SecurityToken securityToken,
Collection<? extends DHTValueEntity> values) {
return factory.createStoreRequest(getLocalNode(), dst, securityToken, values);
}
public StoreResponse createStoreResponse(RequestMessage request,
Collection<StoreStatusCode> status) {
return factory.createStoreResponse(getLocalNode(), request.getContact(),
request.getMessageID(), status);
}
public StatsRequest createStatsRequest(SocketAddress dst, StatisticType request) {
return factory.createStatsRequest(getLocalNode(), dst, request);
}
public StatsResponse createStatsResponse(RequestMessage request, byte[] statistics) {
return factory.createStatsResponse(getLocalNode(), request.getContact(),
request.getMessageID(), statistics);
}
}