github/arthas
4
0
Fork 0
mirror of https://github.com/alibaba/arthas.git synced 2024-04-21 10:21:39 +00:00
Code Issues Packages Projects Releases Wiki Activity

add jvm command display file descriptor count

Browse Source
This commit is contained in:
bohr.qiu
2018-09-21 12:06:52 +08:00
parent 19107ba037
commit d28c9d4def
3 changed files with 40 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
core/src/main/java/com/taobao/arthas/core/command/monitor200/JvmCommand.java
+17 -1
View File
@@ -14,6 +14,7 @@ import com.taobao.text.ui.TableElement;
import com.taobao.text.util.RenderUtil;
import java.lang.management.*;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
@@ -74,12 +75,27 @@ public class JvmCommand extends AnnotatedCommand {
table.row("", "");
table.row(true, label("THREAD").style(Decoration.bold.bold()));
drawThreadTable(table);
table.row("", "");
table.row(true, label("FILE-DESCRIPTOR").style(Decoration.bold.bold()));
drawFileDescriptorTable(table);
process.write(RenderUtil.render(table, process.width()));
process.write(affect.toString()).write("\n");
process.end();
}
private void drawFileDescriptorTable(TableElement table) {
table.row("MAX-FILE-DESCRIPTOR-COUNT", "" + invokeFileDescriptor(operatingSystemMXBean, "getMaxFileDescriptorCount"))
.row("OPEN-FILE-DESCRIPTOR-COUNT", "" + invokeFileDescriptor(operatingSystemMXBean, "getOpenFileDescriptorCount"));
}
private long invokeFileDescriptor(OperatingSystemMXBean os, String name) {
try {
final Method method = os.getClass().getDeclaredMethod(name);
method.setAccessible(true);
return (Long) method.invoke(os);
} catch (Exception e) {
return -1;
}
}
private String toCol(Collection<String> strings) {
final StringBuilder colSB = new StringBuilder();
if (strings.isEmpty()) {