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yacy_search_server/source/de/anomic/tools/diskUsage.java

398 lines
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Java
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// diskUsage.java
// -----------------------
// part of YaCy
// (C) by Detlef Reichl; detlef!reichl()gmx!org
// Pforzheim, Germany, 2008
//
// [MC] made many changes to remove side-effect-based routines towards a more functional programming style
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// 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
// The HashMap contains the following values:
//
// key = the device name e.g. /dev/hda1, on windows the drive e.g. c:
// value[0] = the total space of the volume, on windows not used
// value[1] = the free space of the volume
package de.anomic.tools;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import de.anomic.yacy.logging.Log;
public class diskUsage {
private static Log log = new Log("DISK USAGE");
private static final List<String> allVolumes = new ArrayList<String>();
private static final List<String> allMountPoints = new ArrayList<String>();
private static final List<Boolean> usedVolumes = new ArrayList<Boolean>();
private static final List<String> yacyUsedVolumes = new ArrayList<String>();
private static final List<String> yacyUsedMountPoints = new ArrayList<String>();
private static int usedOS = -1;
private static String usageError = null;
private static String windowsCommand = null;
// Unix-like
private static final int AIX = 0; // IBM
private static final int BS2000 = 1; // Fujitsu Siemens (oficial BS2000/OSD)
//private static final int BSD = 2; // all kind of BSD
private static final int HAIKU = 3; // like BeOS; does not have a JRE til now, but they are working on it
//private static final int HP_UX = 4; // Hewlett-Packard
private static final int TRU64 = 5; // Hewlett-Packard
//private static final int IRIX = 6; // sgi
//private static final int LINUX = 7; // all kind of linux
//private static final int MAC_OS_X = 8; // Apple
private static final int MINIX = 9; // don't know if there even is a JRE for minix...
//private static final int SOLARIS = 10; // SUN
//private static final int SUNOS = 11; // The latest SunOS version is from 1990 but the Solaris java refferer remains SunOS
private static final int UNICOS = 12; // cray
private static final int UNIX_END = UNICOS;
// Windows dos based
//private static final int WINDOWS_95 = 13;
//private static final int WINDOWS_98 = 14;
//private static final int WINDOWS_ME = 15;
// Windows WinNT based
//private static final int WINDOWS_NT = 16;
//private static final int WINDOWS_2000 = 17;
//private static final int WINDOWS_XP = 18;
//private static final int WINDOWS_SERVER = 19;
//private static final int WINDOWS_VISTA = 20;
// don't change order of names!
private static final String[] OSname = {
"aix", "bs2000", "bsd", "haiku", "hp-ux", "tru64", "irix", "linux", "mac os x", "minix",
"solaris", "sunos", "unicos",
"windows 95", "windows 98", "windows me",
"windows nt", "windows 2000", "windows xp", "windows server", "windows vista"};
//////////////////
// public API //
//////////////////
public static void init(final ArrayList<String> pathsToCheck) {
if (usedOS >= 0) return; // prevent double initialization
usedOS = getOS();
if (usedOS == -1) {
return;
}
usageError = null;
if (usedOS <= UNIX_END) {
// some kind of *nix
dfUnixGetVolumes();
for (int i = 0; i < allMountPoints.size(); i++)
usedVolumes.add(false);
checkVolumesInUseUnix ("DATA");
checkMappedSubDirs(pathsToCheck);
for (int i = 0; i < allVolumes.size(); i++){
if (usedVolumes.get(i) == true) {
yacyUsedVolumes.add(allVolumes.get (i));
yacyUsedMountPoints.add(allMountPoints.get (i));
}
}
} else {
// all Windows versions
initWindowsCommandVersion();
checkStartVolume();
checkMappedSubDirs(pathsToCheck);
}
if (yacyUsedVolumes.size() < 1)
usageError = "found no volumes";
}
public static HashMap<String, long[]> getDiskUsage () {
if (usageError != null) return null;
if (usedOS <= UNIX_END)
return dfUnix();
else
return dfWindows();
}
public static boolean isUsable() {
return usageError == null;
}
public static int getNumUsedVolumes () {
return yacyUsedVolumes.size();
}
public static String getErrorMessage() {
return usageError;
}
////////////
// Unix //
////////////
private static HashMap<String, long[]> dfUnix() {
final HashMap<String, long[]> diskUsages = new HashMap<String, long[]>();
try {
final List<String> lines = dfUnixExec();
nextLine: for (final String line: lines){
if (line.charAt(0) != '/') continue;
final String[] tokens = line.split(" +", 6);
if (tokens.length < 6) continue;
for (int i = 0; i < yacyUsedVolumes.size(); i++){
if (yacyUsedVolumes.get(i).equals(tokens[0])) {
final long[] vals = new long[2];
try { vals[0] = Long.valueOf(tokens[1]); } catch (final NumberFormatException e) { continue nextLine; }
try { vals[1] = Long.valueOf(tokens[3]); } catch (final NumberFormatException e) { continue nextLine; }
vals[0] *= 1024;
vals[1] *= 1024;
diskUsages.put(yacyUsedMountPoints.get(i), vals);
}
}
}
return diskUsages;
} catch (final IOException e) {
usageError = "dfUnix: " + e.getMessage();
return diskUsages;
}
}
private static void dfUnixGetVolumes() {
try {
final List<String> lines = dfUnixExec();
nextLine: for (final String line: lines){
if (line.charAt(0) != '/') continue;
final String[] tokens = line.split(" +", 6);
if (tokens.length < 6) continue;
for (int i = 0; i < allMountPoints.size(); i++) {
if (tokens[5].trim().compareTo(allMountPoints.get(i)) > 0) {
allMountPoints.add(i, tokens[5].trim());
allVolumes.add(i, tokens[0]);
continue nextLine;
}
}
allMountPoints.add(allMountPoints.size(), tokens[5]);
allVolumes.add(allVolumes.size(), tokens[0]);
}
} catch (final IOException e) {
usageError = "error during dfUnixGetVolumes: " + e.getMessage();
}
}
private static List<String> dfUnixExec() throws IOException {
// -k set blocksize to 1024
// confirmed with tests:
// Linux
// verified with man pages or other docs:
// AIX, BS2000, *BSD, HP-UX, IRIX, minix, Mac OS X, Solaris, Tru64, UNICOS
// -l list local filesystems only
// confirmed with tests:
// Linux
// verified with man pages or other docs:
// AIX, BS2000, *BSD, HP-UX, IRIX, minix, Mac OS X, Solaris, UNICOS
// please report all successes or fails for non-confirmed systems to
// detlef!reichl()gmx!org. Thanks!
final List<String> processArgs = new ArrayList<String>();
processArgs.add("df");
processArgs.add("-k");
// Some systems need the additional -P parameter to return the data in Posix format.
// Without it the mount point will be in the 7th and not in the 6th column
if (usedOS == AIX || usedOS == BS2000 || usedOS == MINIX || usedOS == UNICOS)
processArgs.add("-P");
// Tru64 does not know the -l parameter
// For haiku i didn't found online docs at all; so better exclude it
if (usedOS != TRU64 && usedOS != HAIKU)
processArgs.add("-l");
final List<String> lines = consoleInterface.getConsoleOutput(processArgs, log);
return lines;
}
private static void checkVolumesInUseUnix (final String path) {
final File file = new File(path);
final File[] fileList = file.listFiles();
if (fileList == null) {
// the file is not a directory
return;
}
String base;
String dir;
for (final File element : fileList) {
if (element.isDirectory()) {
try {
dir = element.getCanonicalPath();
} catch (final IOException e) {
usageError = "checkVolumesInUseUnix(1): " + e.getMessage();
break;
}
if (dir.endsWith ("HTCACHE")
|| dir.endsWith ("HTDOCS")
|| dir.endsWith ("LOCALE")
|| dir.endsWith ("RANKING")
|| dir.endsWith ("RELEASE")
|| dir.endsWith ("collection.0028.commons")) {
checkPathUsageUnix (dir);
} else if (dir != null) {
checkVolumesInUseUnix (dir);
} else {
log.logSevere("directory is null: " + element);
}
} else {
try {
base = element.getCanonicalPath();
} catch (final IOException e) {
usageError = "checkVolumesInUseUnix(2): " + e.getMessage();
break;
}
checkPathUsageUnix (base);
}
}
}
///////////////
// Windows //
///////////////
private static void initWindowsCommandVersion () {
windowsCommand = null;
final String os = System.getProperty("os.name").toLowerCase();
final String[] oses = {"windows 95", "windows 98", "windows me"};
for (final String element : oses) {
if (os.indexOf(element) >= 0){
windowsCommand = "command.com";
break;
}
}
if (windowsCommand == null)
windowsCommand = "cmd.exe";
}
private static void checkStartVolume() {
final File file = new File("DATA");
String path = null;
try { path = file.getCanonicalPath(); } catch (final IOException e) {
usageError = "Cant get DATA directory";
return;
}
if (path.length() < 6)
return;
yacyUsedVolumes.add(path);
}
private static HashMap<String, long[]> dfWindows() {
final HashMap<String, long[]> diskUsages = new HashMap<String, long[]>();
for (int i = 0; i < yacyUsedVolumes.size(); i++){
final List<String> processArgs = new ArrayList<String>();
processArgs.add(windowsCommand);
processArgs.add("/c");
processArgs.add("dir");
processArgs.add("\"" + yacyUsedVolumes.get(i) + "\"");
try {
final List<String> lines = consoleInterface.getConsoleOutput(processArgs, log);
String line = "";
for (int l = lines.size() - 1; l >= 0; l--) {
line = lines.get(l).trim();
if (line.length() > 0) break;
}
if (line.length() == 0) {
usageError = "unable to get free size of volume " + yacyUsedVolumes.get(i);
return diskUsages;
}
final String[] tokens = line.trim().split(" ++");
final long[] vals = new long[2];
vals[0] = -1;
try { vals[1] = Long.valueOf(tokens[2].replaceAll("[.,]", "")); } catch (final NumberFormatException e) {continue;}
diskUsages.put (yacyUsedVolumes.get(i), vals);
} catch (final IOException e) {
usageError = "dfWindows: " + e.getMessage();
return diskUsages;
}
}
return diskUsages;
}
/////////////
// common //
/////////////
private static int getOS() {
final String os = System.getProperty("os.name").toLowerCase();
for (int i = 0; i < OSname.length; i++)
{
if (os.indexOf(OSname[i]) >= 0)
return i;
}
usageError = "unknown operating system (" + System.getProperty("os.name") + ")";
return -1;
}
private static void checkMappedSubDirs (final ArrayList<String> pathsToCheck) {
for (final String path : pathsToCheck) {
if (usedOS <= UNIX_END)
checkPathUsageUnix (path);
else
checkPathUsageWindows (path);
}
}
private static void checkPathUsageUnix (final String path) {
for (int i = 0; i < allMountPoints.size(); i++){
if (path.startsWith (allMountPoints.get(i))) {
usedVolumes.set(i, true);
return;
}
}
}
private static void checkPathUsageWindows(final String path) {
// we would need to ask every path by "dir" as asking the root is not hardlink-proof:
// yacyUsedVolumes.add(path);
return;
/*
int index = -1;
final String sub = path.substring(0, 1); // ?? nur ein character?
try {
index = yacyUsedVolumes.indexOf(sub);
} catch (final IndexOutOfBoundsException e) {
usageError = "internal error while checking used windows volumes";
return;
}
if (index < 0)
yacyUsedVolumes.add(sub);
*/
}
}
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