// Copyright 2012 Citrix Systems, Inc. Licensed under the
// Apache License, Version 2.0 (the "License"); you may not use this
// file except in compliance with the License. Citrix Systems, Inc.
// reserves all rights not expressly granted by 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.
//
// Automatically generated by addcopyright.py at 04/03/2012
package com.cloud.storage.download;
import java.util.Date;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import com.cloud.agent.api.storage.DownloadAnswer;
/**
* @author chiradeep
*
*/
public abstract class DownloadState {
public static enum DownloadEvent {DOWNLOAD_ANSWER, ABANDON_DOWNLOAD, TIMEOUT_CHECK, DISCONNECT};
protected static final Logger s_logger = Logger.getLogger(DownloadListener.class.getName());
private DownloadListener dl;
public DownloadState(DownloadListener dl) {
this.dl = dl;
}
protected DownloadListener getDownloadListener() {
return dl;
}
public String handleEvent(DownloadEvent event, Object eventObj){
if (s_logger.isTraceEnabled()) {
getDownloadListener().log("handleEvent, event type=" + event + ", curr state=" + getName(), Level.TRACE);
}
switch (event) {
case DOWNLOAD_ANSWER:
DownloadAnswer answer=(DownloadAnswer)eventObj;
return handleAnswer(answer);
case ABANDON_DOWNLOAD:
return handleAbort();
case TIMEOUT_CHECK:
Date now = new Date();
long update = now.getTime() - dl.getLastUpdated().getTime();
return handleTimeout(update);
case DISCONNECT:
return handleDisconnect();
}
return null;
}
public void onEntry(String prevState, DownloadEvent event, Object evtObj){
if (s_logger.isTraceEnabled()) {
getDownloadListener().log("onEntry, event type=" + event + ", curr state=" + getName(), Level.TRACE);
}
if (event==DownloadEvent.DOWNLOAD_ANSWER) {
getDownloadListener().updateDatabase((DownloadAnswer)evtObj);
}
}
public void onExit() {
}
public abstract String handleTimeout(long updateMs) ;
public abstract String handleAbort();
public abstract String handleDisconnect();
public abstract String handleAnswer(DownloadAnswer answer) ;
public abstract String getName();
}