oshi.hardware.common.AbstractGlobalMemory Maven / Gradle / Ivy
/**
* Oshi (https://github.com/dblock/oshi)
*
* Copyright (c) 2010 - 2016 The Oshi Project Team
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Maintainers:
* dblock[at]dblock[dot]org
* widdis[at]gmail[dot]com
* enrico.bianchi[at]gmail[dot]com
*
* Contributors:
* https://github.com/dblock/oshi/graphs/contributors
*/
package oshi.hardware.common;
import oshi.hardware.GlobalMemory;
/**
* Memory obtained by /proc/meminfo and sysinfo.totalram
*
* @author alessandro[at]perucchi[dot]org
* @author widdis[at]gmail[dot]com
*/
public abstract class AbstractGlobalMemory implements GlobalMemory {
private static final long serialVersionUID = 1L;
protected long memTotal = 0L;
protected long memAvailable = 0L;
protected long swapTotal = 0L;
protected long swapUsed = 0L;
/**
* Updates physical memory instance variables.
*/
protected abstract void updateMeminfo();
/**
* Updates virtual memory instance variables.
*/
protected abstract void updateSwap();
/**
* {@inheritDoc}
*/
@Override
public long getAvailable() {
updateMeminfo();
return this.memAvailable;
}
/**
* {@inheritDoc}
*/
@Override
public long getTotal() {
if (this.memTotal == 0) {
updateMeminfo();
}
return this.memTotal;
}
/**
* {@inheritDoc}
*/
@Override
public long getSwapUsed() {
updateSwap();
return this.swapUsed;
}
/**
* {@inheritDoc}
*/
@Override
public long getSwapTotal() {
updateSwap();
return this.swapTotal;
}
}