mirror of https://github.com/apache/cloudstack.git
85 lines
2.5 KiB
Java
85 lines
2.5 KiB
Java
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package com.cloud.storage.download;
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import java.util.Date;
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import org.apache.log4j.Level;
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import org.apache.log4j.Logger;
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import com.cloud.agent.api.storage.DownloadAnswer;
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public abstract class DownloadState {
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public static enum DownloadEvent {DOWNLOAD_ANSWER, ABANDON_DOWNLOAD, TIMEOUT_CHECK, DISCONNECT};
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protected static final Logger s_logger = Logger.getLogger(DownloadListener.class.getName());
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private DownloadListener dl;
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public DownloadState(DownloadListener dl) {
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this.dl = dl;
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}
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protected DownloadListener getDownloadListener() {
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return dl;
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}
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public String handleEvent(DownloadEvent event, Object eventObj){
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if (s_logger.isTraceEnabled()) {
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getDownloadListener().log("handleEvent, event type=" + event + ", curr state=" + getName(), Level.TRACE);
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}
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switch (event) {
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case DOWNLOAD_ANSWER:
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DownloadAnswer answer=(DownloadAnswer)eventObj;
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return handleAnswer(answer);
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case ABANDON_DOWNLOAD:
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return handleAbort();
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case TIMEOUT_CHECK:
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Date now = new Date();
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long update = now.getTime() - dl.getLastUpdated().getTime();
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return handleTimeout(update);
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case DISCONNECT:
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return handleDisconnect();
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}
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return null;
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}
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public void onEntry(String prevState, DownloadEvent event, Object evtObj){
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if (s_logger.isTraceEnabled()) {
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getDownloadListener().log("onEntry, event type=" + event + ", curr state=" + getName(), Level.TRACE);
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}
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if (event==DownloadEvent.DOWNLOAD_ANSWER) {
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getDownloadListener().updateDatabase((DownloadAnswer)evtObj);
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}
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}
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public void onExit() {
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}
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public abstract String handleTimeout(long updateMs) ;
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public abstract String handleAbort();
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public abstract String handleDisconnect();
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public abstract String handleAnswer(DownloadAnswer answer) ;
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public abstract String getName();
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}
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