/** Loads stats from /proc/[pid]/stat and /proc/[pid]/statm files */
public static ProcessStatus getProcStats(String pid) {
// using a space as the delimeter.
String data;
// get the /proc/[pid]/stat as a string and them split into string array
// using a space as the delimeter.
try {
data = FileReadUtil.readFirstLine(String.format(STAT_FILE, pid));
String[] procStatData = data.split(SPACE_VALUE);
long startTimeSecs =
UnsignedLong.valueOf(procStatData[STAT_STARTTIME])
.dividedBy(UnsignedLong.fromLongBits(HZ))
.longValue();
long currTimeSecs = new Date().getTime() / 1000;
long upTimeSecs = currTimeSecs - (getBootTime() + startTimeSecs);
return new ProcessStatus(
upTimeSecs,
Long.parseLong(procStatData[STAT_NUM_THREADS]),
startTimeSecs,
Integer.parseInt(procStatData[STAT_PID]),
Long.parseLong(procStatData[STAT_RSS]) * getPageSize(),
Long.parseLong(procStatData[STAT_VSIZE]));
} catch (Exception e) {
_log.error("Error occurred while getting service stats from /stats file: {}", e);
}
return null;
}
@Test
public void testGetULong() throws Exception {
try (Cursor cursor =
new SimpleCursor(
QueryResult.newBuilder()
.addFields(
Field.newBuilder()
.setName("col0")
.setType(Field.Type.TYPE_LONGLONG)
.setFlags(Field.Flag.VT_UNSIGNED_FLAG_VALUE)
.build())
.addRows(
Row.newBuilder().addValues(ByteString.copyFromUtf8("18446744073709551615")))
.build())) {
cursor.next();
Assert.assertEquals(UnsignedLong.fromLongBits(-1), cursor.getULong("col0"));
}
}
@Test
public void testGetULong() throws Exception {
try (Cursor cursor =
new SimpleCursor(
QueryResult.newBuilder()
.addFields(Field.newBuilder().setName("col1").setType(Query.Type.UINT64).build())
.addFields(Field.newBuilder().setName("null").setType(Query.Type.UINT64).build())
.addRows(
Query.Row.newBuilder()
.addLengths("18446744073709551615".length())
.addLengths(-1) // SQL NULL
.setValues(ByteString.copyFromUtf8("18446744073709551615")))
.build())) {
Row row = cursor.next();
Assert.assertNotNull(row);
Assert.assertEquals(UnsignedLong.fromLongBits(-1), row.getULong("col1"));
Assert.assertFalse(row.wasNull());
Assert.assertEquals(null, row.getULong("null"));
Assert.assertTrue(row.wasNull());
}
}
