Class | Line # | Actions | |||
---|---|---|---|---|---|
GetMemory | 40 | 7 | 3 |
1 | /* | |
2 | * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$) | |
3 | * Copyright (C) $$Year-Rel$$ The Jalview Authors | |
4 | * | |
5 | * This file is part of Jalview. | |
6 | * | |
7 | * Jalview is free software: you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation, either version 3 | |
10 | * of the License, or (at your option) any later version. | |
11 | * | |
12 | * Jalview is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty | |
14 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR | |
15 | * PURPOSE. See the GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with Jalview. If not, see <http://www.gnu.org/licenses/>. | |
19 | * The Jalview Authors are detailed in the 'AUTHORS' file. | |
20 | */ | |
21 | package jalview.bin; | |
22 | ||
23 | import java.lang.management.ManagementFactory; | |
24 | import java.lang.management.OperatingSystemMXBean; | |
25 | ||
26 | import jalview.util.ErrorLog; | |
27 | ||
28 | /** | |
29 | * Isolated class to ascertain physical memory of the system using | |
30 | * com.sun.management.OperatingSystemMXBean class's getTotalPhysicalMemorySize | |
31 | * method. This class is present in OpenJDK 8,9,10,11,12,13. It is present but | |
32 | * marked as deprecated in the early-access(30) release of OpenJDK 14. In case | |
33 | * of an alternative/unsupported JRE being used or the class/method not being | |
34 | * implemented in an exotic architecture JRE this call has been isolated into | |
35 | * this separate class. | |
36 | * | |
37 | * @author bsoares | |
38 | * | |
39 | */ | |
40 | class GetMemory | |
41 | { | |
42 | ||
43 | /** | |
44 | * Wrapper for | |
45 | * com.sun.management.OperatingSystemMXBean.getTotalPhysicalMemorySize() | |
46 | * | |
47 | * @return Result of | |
48 | * com.sun.management.OperatingSystemMXBean.getTotalPhysicalMemorySize() | |
49 | * or -1 if this class is not present in the JRE. | |
50 | */ | |
51 | 16 | protected static long getPhysicalMemory() |
52 | { | |
53 | 16 | final OperatingSystemMXBean o = ManagementFactory |
54 | .getOperatingSystemMXBean(); | |
55 | ||
56 | 16 | try |
57 | { | |
58 | 16 | if (o instanceof com.sun.management.OperatingSystemMXBean) |
59 | { | |
60 | 16 | final com.sun.management.OperatingSystemMXBean osb = (com.sun.management.OperatingSystemMXBean) o; |
61 | 16 | return osb.getTotalPhysicalMemorySize(); |
62 | } | |
63 | } catch (NoClassDefFoundError e) | |
64 | { | |
65 | // com.sun.management.OperatingSystemMXBean doesn't exist in this JVM | |
66 | 0 | ErrorLog.errPrintln( |
67 | "No com.sun.management.OperatingSystemMXBean: cannot get total physical memory size"); | |
68 | } | |
69 | ||
70 | // We didn't get a com.sun.management.OperatingSystemMXBean. | |
71 | 0 | return -1; |
72 | } | |
73 | ||
74 | } |