/*
* NOTE: This copyright does *not* cover user programs that use HQ
* program services by normal system calls through the application
* program interfaces provided as part of the Hyperic Plug-in Development
* Kit or the Hyperic Client Development Kit - this is merely considered
* normal use of the program, and does *not* fall under the heading of
* "derived work".
*
* Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
* This file is part of HQ.
*
* HQ is free software; you can redistribute it and/or modify
* it under the terms version 2 of the GNU General Public License as
* published by the Free Software Foundation. This program is distributed
* in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*/
package org.hyperic.hq.ui.servlet;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hyperic.hq.appdef.shared.AppdefEntityID;
import org.hyperic.hq.appdef.shared.AppdefEntityTypeID;
import org.hyperic.hq.bizapp.shared.MeasurementBoss;
import org.hyperic.hq.context.Bootstrap;
import org.hyperic.hq.measurement.MeasurementConstants;
import org.hyperic.hq.ui.Constants;
import org.hyperic.hq.ui.exception.ParameterNotFoundException;
import org.hyperic.hq.ui.util.RequestUtils;
import org.hyperic.util.StringUtil;
import org.hyperic.util.file.FileUtil;
import org.hyperic.util.timer.StopWatch;
/**
* Base class for availability servlets
*/
public abstract class AvailabilityBaseServlet extends HttpServlet {
private static Log log =
LogFactory.getLog(AvailabilityBaseServlet.class.getName());
private Map iconData = new HashMap();
public void init() {
// read the icon bytes and cache them
String[] urls = getIconUrls();
for (int i = 0; i < urls.length; i++) {
String url = urls[i];
ByteArrayOutputStream bs = new ByteArrayOutputStream();
try {
FileUtil.copyStream(
getServletContext().getResourceAsStream(url), bs);
} catch (IOException e) {
log.debug("Could not load icon " + url, e);
}
iconData.put(url, new IconBytes(bs.toByteArray()));
}
}
protected void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
final boolean debug = log.isDebugEnabled();
StopWatch watch = new StopWatch();
try {
int sessionId = RequestUtils.getSessionId(request).intValue();
AppdefEntityID[] eids = null;
try {
eids = RequestUtils.getEntityIds(request);
} catch (ParameterNotFoundException e) {
// okay, auto-group of platforms
}
AppdefEntityTypeID atid = null;
String ctype = RequestUtils.getStringParameter(
request, Constants.CHILD_RESOURCE_TYPE_ID_PARAM, null);
if(ctype != null) {
// looks like we got an autogroup
atid = new AppdefEntityTypeID(ctype);
}
// Don't cache availability icons.
RequestUtils.bustaCache(request, response);
if (eids != null && debug)
log.debug("Getting availability for resources [" +
StringUtil.arrayToString(eids) + "]");
double val;
StopWatch timer = new StopWatch();
MeasurementBoss boss =
Bootstrap.getBean(MeasurementBoss.class);
if (null == ctype) {
val = boss.getAvailability(sessionId, eids[0]);
} else {
val = boss.getAGAvailability(sessionId, eids, atid);
}
if (debug) {
log.debug("Elapsed time: " + timer.getElapsed() + " ms");
}
if (val == MeasurementConstants.AVAIL_UNKNOWN) {
sendErrorIcon(request, response);
} else if (val == MeasurementConstants.AVAIL_DOWN) {
sendUnavailIcon(request, response);
} else if (val == MeasurementConstants.AVAIL_UP) {
sendAvailIcon(request, response);
} else if (val == MeasurementConstants.AVAIL_PAUSED) {
sendPausedIcon(request, response);
} else if (val == MeasurementConstants.AVAIL_POWERED_OFF) {
sendPoweredOffIcon(request, response);
}else {
sendWarningIcon(request, response);
}
} catch (Throwable t) {
if(debug) {
log.debug("Can't get availability measurement: ", t);
}
sendErrorIcon(request, response);
return;
}
sendAvailIcon(request, response);
if (debug) {
log.debug("AvailabilityBaseServlet.doGet: " + watch);
}
}
protected abstract String[] getIconUrls();
protected void sendIcon(HttpServletRequest request,
HttpServletResponse response, String url)
throws IOException {
response.setStatus(HttpServletResponse.SC_OK);
response.setContentType("image/gif");
IconBytes icon = (IconBytes) iconData.get(url);
response.setContentLength(icon.getLength());
response.getOutputStream().write(icon.getBytes());
response.flushBuffer();
}
protected abstract void sendAvailIcon(HttpServletRequest request,
HttpServletResponse response);
protected abstract void sendUnavailIcon(HttpServletRequest request,
HttpServletResponse response);
protected abstract void sendWarningIcon(HttpServletRequest request,
HttpServletResponse response);
protected abstract void sendPausedIcon(HttpServletRequest request,
HttpServletResponse response);
protected abstract void sendPoweredOffIcon(HttpServletRequest request,
HttpServletResponse response);
protected abstract void sendErrorIcon(HttpServletRequest request,
HttpServletResponse response);
protected class IconBytes {
private byte[] bytes;
public IconBytes(byte[] theBytes) {
bytes = theBytes;
}
public byte[] getBytes() {
return bytes;
}
public int getLength() {
return bytes.length;
}
}
}