// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 com.cloud.storage.upload;
import java.util.Date;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import com.cloud.agent.api.storage.UploadAnswer;
public abstract class UploadState {
public static enum UploadEvent {
UPLOAD_ANSWER, ABANDON_UPLOAD, TIMEOUT_CHECK, DISCONNECT
};
protected static final Logger s_logger = Logger.getLogger(UploadListener.class.getName());
private UploadListener ul;
public UploadState(UploadListener ul) {
this.ul = ul;
}
protected UploadListener getUploadListener() {
return ul;
}
public String handleEvent(UploadEvent event, Object eventObj) {
if (s_logger.isTraceEnabled()) {
getUploadListener().log("handleEvent, event type=" + event + ", curr state=" + getName(), Level.TRACE);
}
switch (event) {
case UPLOAD_ANSWER:
UploadAnswer answer = (UploadAnswer)eventObj;
return handleAnswer(answer);
case ABANDON_UPLOAD:
return handleAbort();
case TIMEOUT_CHECK:
Date now = new Date();
long update = now.getTime() - ul.getLastUpdated().getTime();
return handleTimeout(update);
case DISCONNECT:
return handleDisconnect();
}
return null;
}
public void onEntry(String prevState, UploadEvent event, Object evtObj) {
if (s_logger.isTraceEnabled()) {
getUploadListener().log("onEntry, event type=" + event + ", curr state=" + getName(), Level.TRACE);
}
if (event == UploadEvent.UPLOAD_ANSWER) {
getUploadListener().updateDatabase((UploadAnswer)evtObj);
}
}
public void onExit() {
}
public abstract String handleTimeout(long updateMs);
public abstract String handleAbort();
public abstract String handleDisconnect();
public abstract String handleAnswer(UploadAnswer answer);
public abstract String getName();
}