oshi.software.common.AbstractOperatingSystem 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.software.common;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import oshi.software.os.OSProcess;
import oshi.software.os.OperatingSystem;
import oshi.software.os.OperatingSystemVersion;
public abstract class AbstractOperatingSystem implements OperatingSystem {
private static final long serialVersionUID = 1L;
protected String manufacturer;
protected String family;
protected OperatingSystemVersion version;
/*
* Comparators for use in processSort()
*/
private static final Comparator CPU_DESC_SORT = (p1, p2) -> Double.compare(
(p2.getKernelTime() + p2.getUserTime()) / (double) p2.getUpTime(),
(p1.getKernelTime() + p1.getUserTime()) / (double) p1.getUpTime());
private static final Comparator RSS_DESC_SORT = (p1, p2) -> Long.compare(p2.getResidentSetSize(),
p1.getResidentSetSize());
private static final Comparator UPTIME_DESC_SORT = (p1, p2) -> Long.compare(p2.getUpTime(),
p1.getUpTime());
private static final Comparator UPTIME_ASC_SORT = (p1, p2) -> Long.compare(p1.getUpTime(),
p2.getUpTime());
private static final Comparator PID_ASC_SORT = (p1, p2) -> Integer.compare(p1.getProcessID(),
p2.getProcessID());
private static final Comparator PARENTPID_ASC_SORT = (p1, p2) -> Integer.compare(p1.getParentProcessID(),
p2.getParentProcessID());
private static final Comparator NAME_ASC_SORT = (p1, p2) -> p1.getName().toLowerCase()
.compareTo(p2.getName().toLowerCase());
/**
* {@inheritDoc}
*/
@Override
public OperatingSystemVersion getVersion() {
return this.version;
}
/**
* {@inheritDoc}
*/
@Override
public String getFamily() {
return this.family;
}
/**
* {@inheritDoc}
*/
@Override
public String getManufacturer() {
return this.manufacturer;
}
/**
* Sorts an array of processes using the specified sorting, returning an
* array with the top limit results if positive.
*
* @param processes
* The array to sort
* @param limit
* The number of results to return if positive; if zero returns
* all results
* @param sort
* The sorting to use, or null
* @return An array of size limit (if positive) or of all processes, sorted
* as specified
*/
protected List processSort(List processes, int limit, ProcessSort sort) {
if (sort != null) {
switch (sort) {
case CPU:
Collections.sort(processes, CPU_DESC_SORT);
break;
case MEMORY:
Collections.sort(processes, RSS_DESC_SORT);
break;
case OLDEST:
Collections.sort(processes, UPTIME_DESC_SORT);
break;
case NEWEST:
Collections.sort(processes, UPTIME_ASC_SORT);
break;
case PID:
Collections.sort(processes, PID_ASC_SORT);
break;
case PARENTPID:
Collections.sort(processes, PARENTPID_ASC_SORT);
break;
case NAME:
Collections.sort(processes, NAME_ASC_SORT);
break;
default:
// Should never get here! If you get this exception you've
// added something to the enum without adding it here. Tsk.
throw new IllegalArgumentException("Unimplemented enum type: " + sort.toString());
}
}
// Return max of limit or process size
// Nonpositive limit means return all
int maxProcs = processes.size();
if (limit > 0 && maxProcs > limit) {
maxProcs = limit;
}
List procs = new ArrayList<>();
for (int i = 0; i < maxProcs; i++) {
procs.add(processes.get(i));
}
return procs;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(getManufacturer()).append(' ').append(getFamily()).append(' ').append(getVersion().toString());
return sb.toString();
}
}