/**
* $RCSfile$
* $Revision$
* $Date$
*
* Copyright 2005-2007 Jive Software.
*
* All rights reserved. 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.commands;
import org.jivesoftware.smack.PacketCollector;
import org.jivesoftware.smack.SmackConfiguration;
import org.jivesoftware.smack.Connection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.filter.PacketIDFilter;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smackx.Form;
import org.jivesoftware.smackx.packet.AdHocCommandData;
/**
* Represents a command that is in a remote location. Invoking one of the
* {@link AdHocCommand.Action#execute execute}, {@link AdHocCommand.Action#next next},
* {@link AdHocCommand.Action#prev prev}, {@link AdHocCommand.Action#cancel cancel} or
* {@link AdHocCommand.Action#complete complete} actions results in executing that
* action in the remote location. In response to that action the internal state
* of the this command instance will change. For example, if the command is a
* single stage command, then invoking the execute action will execute this
* action in the remote location. After that the local instance will have a
* state of "completed" and a form or notes that applies.
*
* @author Gabriel Guardincerri
*
*/
public class RemoteCommand extends AdHocCommand {
/**
* The connection that is used to execute this command
*/
private Connection connection;
/**
* The full JID of the command host
*/
private String jid;
/**
* The session ID of this execution.
*/
private String sessionID;
/**
* The number of milliseconds to wait for a response from the server
* The default value is the default packet reply timeout (5000 ms).
*/
private long packetReplyTimeout;
/**
* Creates a new RemoteCommand that uses an specific connection to execute a
* command identified by <code>node</code> in the host identified by
* <code>jid</code>
*
* @param connection the connection to use for the execution.
* @param node the identifier of the command.
* @param jid the JID of the host.
*/
protected RemoteCommand(Connection connection, String node, String jid) {
super();
this.connection = connection;
this.jid = jid;
this.setNode(node);
this.packetReplyTimeout = SmackConfiguration.getPacketReplyTimeout();
}
@Override
public void cancel() throws XMPPException {
executeAction(Action.cancel, packetReplyTimeout);
}
@Override
public void complete(Form form) throws XMPPException {
executeAction(Action.complete, form, packetReplyTimeout);
}
@Override
public void execute() throws XMPPException {
executeAction(Action.execute, packetReplyTimeout);
}
/**
* Executes the default action of the command with the information provided
* in the Form. This form must be the anwser form of the previous stage. If
* there is a problem executing the command it throws an XMPPException.
*
* @param form the form anwser of the previous stage.
* @throws XMPPException if an error occurs.
*/
public void execute(Form form) throws XMPPException {
executeAction(Action.execute, form, packetReplyTimeout);
}
@Override
public void next(Form form) throws XMPPException {
executeAction(Action.next, form, packetReplyTimeout);
}
@Override
public void prev() throws XMPPException {
executeAction(Action.prev, packetReplyTimeout);
}
private void executeAction(Action action, long packetReplyTimeout) throws XMPPException {
executeAction(action, null, packetReplyTimeout);
}
/**
* Executes the <code>action</codo> with the <code>form</code>.
* The action could be any of the available actions. The form must
* be the anwser of the previous stage. It can be <tt>null</tt> if it is the first stage.
*
* @param action the action to execute.
* @param form the form with the information.
* @param timeout the amount of time to wait for a reply.
* @throws XMPPException if there is a problem executing the command.
*/
private void executeAction(Action action, Form form, long timeout) throws XMPPException {
// TODO: Check that all the required fields of the form were filled, if
// TODO: not throw the corresponding exeption. This will make a faster response,
// TODO: since the request is stoped before it's sent.
AdHocCommandData data = new AdHocCommandData();
data.setType(IQ.Type.SET);
data.setTo(getOwnerJID());
data.setNode(getNode());
data.setSessionID(sessionID);
data.setAction(action);
if (form != null) {
data.setForm(form.getDataFormToSend());
}
PacketCollector collector = connection.createPacketCollector(
new PacketIDFilter(data.getPacketID()));
connection.sendPacket(data);
Packet response = collector.nextResult(timeout);
// Cancel the collector.
collector.cancel();
if (response == null) {
throw new XMPPException("No response from server on status set.");
}
if (response.getError() != null) {
throw new XMPPException(response.getError());
}
AdHocCommandData responseData = (AdHocCommandData) response;
this.sessionID = responseData.getSessionID();
super.setData(responseData);
}
@Override
public String getOwnerJID() {
return jid;
}
/**
* Returns the number of milliseconds to wait for a respone. The
* {@link SmackConfiguration#getPacketReplyTimeout default} value
* should be adjusted for commands that can take a long time to execute.
*
* @return the number of milliseconds to wait for responses.
*/
public long getPacketReplyTimeout() {
return packetReplyTimeout;
}
/**
* Returns the number of milliseconds to wait for a respone. The
* {@link SmackConfiguration#getPacketReplyTimeout default} value
* should be adjusted for commands that can take a long time to execute.
*
* @param packetReplyTimeout the number of milliseconds to wait for responses.
*/
public void setPacketReplyTimeout(long packetReplyTimeout) {
this.packetReplyTimeout = packetReplyTimeout;
}
}