/*
* The MIT License
*
* Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi, Seiji Sogabe
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package hudson.node_monitors;
import hudson.Util;
import hudson.Extension;
import hudson.model.Computer;
import hudson.model.Hudson;
import hudson.remoting.Callable;
import net.sf.json.JSONObject;
import org.jvnet.hudson.MemoryMonitor;
import org.jvnet.hudson.MemoryUsage;
import org.kohsuke.stapler.StaplerRequest;
import org.kohsuke.stapler.export.ExportedBean;
import org.kohsuke.stapler.export.Exported;
import java.io.IOException;
/**
* Checks the swap space availability.
*
* @author Kohsuke Kawaguchi
* @sine 1.233
*/
public class SwapSpaceMonitor extends NodeMonitor {
/**
* Returns the HTML representation of the space.
*/
public String toHtml(MemoryUsage usage) {
if(usage.availableSwapSpace==-1)
return "N/A";
long free = usage.availableSwapSpace;
free/=1024L; // convert to KB
free/=1024L; // convert to MB
if(free>256 || usage.totalSwapSpace<usage.availableSwapSpace*5)
return free+"MB"; // if we have more than 256MB free or less than 80% filled up, it's OK
// Otherwise considered dangerously low.
return Util.wrapToErrorSpan(free+"MB");
}
public long toMB(MemoryUsage usage) {
if(usage.availableSwapSpace==-1)
return -1;
long free = usage.availableSwapSpace;
free/=1024L; // convert to KB
free/=1024L; // convert to MB
return free;
}
@Override
public String getColumnCaption() {
// Hide this column from non-admins
return Hudson.getInstance().hasPermission(Hudson.ADMINISTER) ? super.getColumnCaption() : null;
}
@Extension
public static final AbstractNodeMonitorDescriptor<MemoryUsage> DESCRIPTOR = new AbstractNodeMonitorDescriptor<MemoryUsage>() {
protected MemoryUsage monitor(Computer c) throws IOException, InterruptedException {
return c.getChannel().call(new MonitorTask());
}
public String getDisplayName() {
return Messages.SwapSpaceMonitor_DisplayName();
}
@Override
public NodeMonitor newInstance(StaplerRequest req, JSONObject formData) throws FormException {
return new SwapSpaceMonitor();
}
};
/**
* Obtains the string that represents the architecture.
*/
private static class MonitorTask implements Callable<MemoryUsage,IOException> {
public MemoryUsage call() throws IOException {
MemoryMonitor mm;
try {
mm = MemoryMonitor.get();
} catch (IOException e) {
if(!warned) {
// report the problem just once, and avoid filling up the log with the same error. see HUDSON-2194.
warned = true;
throw e;
} else {
return null;
}
}
return new MemoryUsage2(mm.monitor());
}
private static final long serialVersionUID = 1L;
private static boolean warned = false;
}
/**
* Memory Usage.
*
* <p>
* {@link MemoryUsage} + stapler annotations.
*/
@ExportedBean
public static class MemoryUsage2 extends MemoryUsage {
public MemoryUsage2(MemoryUsage mem) {
super(mem.totalPhysicalMemory, mem.availablePhysicalMemory, mem.totalSwapSpace, mem.availableSwapSpace);
}
/**
* Total physical memory of the system, in bytes.
*/
@Exported
public long getTotalPhysicalMemory() {
return totalPhysicalMemory;
}
/**
* Of the total physical memory of the system, available bytes.
*/
@Exported
public long getAvailablePhysicalMemory() {
return availablePhysicalMemory;
}
/**
* Total number of swap space in bytes.
*/
@Exported
public long getTotalSwapSpace() {
return totalSwapSpace;
}
/**
* Available swap space in bytes.
*/
@Exported
public long getAvailableSwapSpace() {
return availableSwapSpace;
}
}
}