PubSubManager.java
/**
*
* Copyright the original author or authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.pubsub;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.jivesoftware.smack.SmackException.NoResponseException;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException.XMPPErrorException;
import org.jivesoftware.smack.packet.EmptyResultIQ;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.IQ.Type;
import org.jivesoftware.smack.packet.Stanza;
import org.jivesoftware.smack.packet.ExtensionElement;
import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
import org.jivesoftware.smackx.disco.packet.DiscoverInfo;
import org.jivesoftware.smackx.disco.packet.DiscoverItems;
import org.jivesoftware.smackx.pubsub.packet.PubSub;
import org.jivesoftware.smackx.pubsub.packet.PubSubNamespace;
import org.jivesoftware.smackx.pubsub.util.NodeUtils;
import org.jivesoftware.smackx.xdata.Form;
import org.jivesoftware.smackx.xdata.FormField;
import org.jxmpp.jid.DomainBareJid;
import org.jxmpp.jid.Jid;
import org.jxmpp.jid.impl.JidCreate;
import org.jxmpp.stringprep.XmppStringprepException;
/**
* This is the starting point for access to the pubsub service. It
* will provide access to general information about the service, as
* well as create or retrieve pubsub {@link LeafNode} instances. These
* instances provide the bulk of the functionality as defined in the
* pubsub specification <a href="http://xmpp.org/extensions/xep-0060.html">XEP-0060</a>.
*
* @author Robin Collier
*/
final public class PubSubManager
{
private XMPPConnection con;
private DomainBareJid to;
private Map<String, Node> nodeMap = new ConcurrentHashMap<String, Node>();
/**
* Create a pubsub manager associated to the specified connection. Defaults the service
* name to <i>pubsub</i>
*
* @param connection The XMPP connection
* @throws XmppStringprepException
*/
public PubSubManager(XMPPConnection connection) throws XmppStringprepException
{
con = connection;
to = JidCreate.domainBareFrom("pubsub." + connection.getServiceName());
}
/**
* Create a pubsub manager associated to the specified connection where
* the pubsub requests require a specific to address for packets.
*
* @param connection The XMPP connection
* @param toAddress The pubsub specific to address (required for some servers)
*/
public PubSubManager(XMPPConnection connection, DomainBareJid toAddress)
{
con = connection;
to = toAddress;
}
/**
* Creates an instant node, if supported.
*
* @return The node that was created
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*/
public LeafNode createNode() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException
{
PubSub reply = sendPubsubPacket(Type.set, new NodeExtension(PubSubElementType.CREATE), null);
NodeExtension elem = reply.getExtension("create", PubSubNamespace.BASIC.getXmlns());
LeafNode newNode = new LeafNode(con, elem.getNode());
newNode.setTo(to);
nodeMap.put(newNode.getId(), newNode);
return newNode;
}
/**
* Creates a node with default configuration.
*
* @param id The id of the node, which must be unique within the
* pubsub service
* @return The node that was created
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*/
public LeafNode createNode(String id) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException
{
return (LeafNode)createNode(id, null);
}
/**
* Creates a node with specified configuration.
*
* Note: This is the only way to create a collection node.
*
* @param name The name of the node, which must be unique within the
* pubsub service
* @param config The configuration for the node
* @return The node that was created
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*/
public Node createNode(String name, Form config) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException
{
PubSub request = PubSub.createPubsubPacket(to, Type.set, new NodeExtension(PubSubElementType.CREATE, name), null);
boolean isLeafNode = true;
if (config != null)
{
request.addExtension(new FormNode(FormNodeType.CONFIGURE, config));
FormField nodeTypeField = config.getField(ConfigureNodeFields.node_type.getFieldName());
if (nodeTypeField != null)
isLeafNode = nodeTypeField.getValues().get(0).equals(NodeType.leaf.toString());
}
// Errors will cause exceptions in getReply, so it only returns
// on success.
sendPubsubPacket(con, request);
Node newNode = isLeafNode ? new LeafNode(con, name) : new CollectionNode(con, name);
newNode.setTo(to);
nodeMap.put(newNode.getId(), newNode);
return newNode;
}
/**
* Retrieves the requested node, if it exists. It will throw an
* exception if it does not.
*
* @param id - The unique id of the node
* @return the node
* @throws XMPPErrorException The node does not exist
* @throws NoResponseException if there was no response from the server.
* @throws NotConnectedException
* @throws InterruptedException
*/
@SuppressWarnings("unchecked")
public <T extends Node> T getNode(String id) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException
{
Node node = nodeMap.get(id);
if (node == null)
{
DiscoverInfo info = new DiscoverInfo();
info.setTo(to);
info.setNode(id);
DiscoverInfo infoReply = (DiscoverInfo) con.createPacketCollectorAndSend(info).nextResultOrThrow();
if (infoReply.hasIdentity(PubSub.ELEMENT, "leaf")) {
node = new LeafNode(con, id);
}
else if (infoReply.hasIdentity(PubSub.ELEMENT, "collection")) {
node = new CollectionNode(con, id);
}
else {
// XEP-60 5.3 states that
// "The 'disco#info' result MUST include an identity with a category of 'pubsub' and a type of either 'leaf' or 'collection'."
// If this is not the case, then we are dealing with an PubSub implementation that doesn't follow the specification.
throw new AssertionError(
"PubSub service '"
+ to
+ "' returned disco info result for node '"
+ id
+ "', but it did not contain an Identity of type 'leaf' or 'collection' (and category 'pubsub'), which is not allowed according to XEP-60 5.3.");
}
node.setTo(to);
nodeMap.put(id, node);
}
return (T) node;
}
/**
* Get all the nodes that currently exist as a child of the specified
* collection node. If the service does not support collection nodes
* then all nodes will be returned.
*
* To retrieve contents of the root collection node (if it exists),
* or there is no root collection node, pass null as the nodeId.
*
* @param nodeId - The id of the collection node for which the child
* nodes will be returned.
* @return {@link DiscoverItems} representing the existing nodes
* @throws XMPPErrorException
* @throws NoResponseException if there was no response from the server.
* @throws NotConnectedException
* @throws InterruptedException
*/
public DiscoverItems discoverNodes(String nodeId) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException
{
DiscoverItems items = new DiscoverItems();
if (nodeId != null)
items.setNode(nodeId);
items.setTo(to);
DiscoverItems nodeItems = (DiscoverItems) con.createPacketCollectorAndSend(items).nextResultOrThrow();
return nodeItems;
}
/**
* Gets the subscriptions on the root node.
*
* @return List of exceptions
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*/
public List<Subscription> getSubscriptions() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException
{
Stanza reply = sendPubsubPacket(Type.get, new NodeExtension(PubSubElementType.SUBSCRIPTIONS), null);
SubscriptionsExtension subElem = reply.getExtension(PubSubElementType.SUBSCRIPTIONS.getElementName(), PubSubElementType.SUBSCRIPTIONS.getNamespace().getXmlns());
return subElem.getSubscriptions();
}
/**
* Gets the affiliations on the root node.
*
* @return List of affiliations
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*
*/
public List<Affiliation> getAffiliations() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException
{
PubSub reply = sendPubsubPacket(Type.get, new NodeExtension(PubSubElementType.AFFILIATIONS), null);
AffiliationsExtension listElem = reply.getExtension(PubSubElementType.AFFILIATIONS);
return listElem.getAffiliations();
}
/**
* Delete the specified node
*
* @param nodeId
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*/
public void deleteNode(String nodeId) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException
{
sendPubsubPacket(Type.set, new NodeExtension(PubSubElementType.DELETE, nodeId), PubSubElementType.DELETE.getNamespace());
nodeMap.remove(nodeId);
}
/**
* Returns the default settings for Node configuration.
*
* @return configuration form containing the default settings.
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*/
public ConfigureForm getDefaultConfiguration() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException
{
// Errors will cause exceptions in getReply, so it only returns
// on success.
PubSub reply = sendPubsubPacket(Type.get, new NodeExtension(PubSubElementType.DEFAULT), PubSubElementType.DEFAULT.getNamespace());
return NodeUtils.getFormFromPacket(reply, PubSubElementType.DEFAULT);
}
/**
* Gets the supported features of the servers pubsub implementation
* as a standard {@link DiscoverInfo} instance.
*
* @return The supported features
* @throws XMPPErrorException
* @throws NoResponseException
* @throws NotConnectedException
* @throws InterruptedException
*/
public DiscoverInfo getSupportedFeatures() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException
{
ServiceDiscoveryManager mgr = ServiceDiscoveryManager.getInstanceFor(con);
return mgr.discoverInfo(to);
}
private PubSub sendPubsubPacket(Type type, ExtensionElement ext, PubSubNamespace ns)
throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
return sendPubsubPacket(con, to, type, Collections.singletonList(ext), ns);
}
static PubSub sendPubsubPacket(XMPPConnection con, Jid to, Type type, List<ExtensionElement> extList, PubSubNamespace ns) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException
{
PubSub pubSub = new PubSub(to, type, ns);
for (ExtensionElement pe : extList) {
pubSub.addExtension(pe);
}
return sendPubsubPacket(con ,pubSub);
}
static PubSub sendPubsubPacket(XMPPConnection con, PubSub packet) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException
{
IQ resultIQ = con.createPacketCollectorAndSend(packet).nextResultOrThrow();
if (resultIQ instanceof EmptyResultIQ) {
return null;
}
return (PubSub) resultIQ;
}
}