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Use monotonic clocks for JDBMSpace timeouts. #422

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Use monotonic clocks for JDBMSpace timeouts. #422

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36 changes: 20 additions & 16 deletions jpos/src/main/java/org/jpos/space/JDBMSpace.java
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Original file line number Diff line number Diff line change
Expand Up @@ -322,13 +322,14 @@ public synchronized V in (Object key) {
*/
public synchronized V in (Object key, long timeout) {
Object obj;
Instant now = Instant.now();
long duration;
Duration to = Duration.ofMillis(timeout);
Duration now = Duration.ofNanos(System.nanoTime());
Duration duration;
while ((obj = inp (key)) == null &&
(duration = Duration.between(now, Instant.now()).toMillis()) < timeout)
to.compareTo(duration = Duration.ofNanos(System.nanoTime()).minus(now)) > 0)
{
try {
this.wait (timeout - duration);
this.wait (Math.max(to.minus(duration).toMillis(), 1L));
} catch (InterruptedException ignored) { }
}
return (V) obj;
Expand Down Expand Up @@ -358,13 +359,14 @@ public synchronized V rd (Object key) {
*/
public synchronized V rd (Object key, long timeout) {
Object obj;
Instant now = Instant.now();
long duration;
Duration to = Duration.ofMillis(timeout);
Duration now = Duration.ofNanos(System.nanoTime());
Duration duration;
while ((obj = rdp (key)) == null &&
(duration = Duration.between(now, Instant.now()).toMillis()) < timeout)
to.compareTo(duration = Duration.ofNanos(System.nanoTime()).minus(now)) > 0)
{
try {
this.wait (timeout - duration);
this.wait (Math.max(to.minus(duration).toMillis(), 1L));
} catch (InterruptedException ignored) { }
}
return (V) obj;
Expand All @@ -378,13 +380,14 @@ public synchronized void nrd (Object key) {
}
public synchronized V nrd (Object key, long timeout) {
Object obj;
Instant now = Instant.now();
long duration;
Duration to = Duration.ofMillis(timeout);
Duration now = Duration.ofNanos(System.nanoTime());
Duration duration;
while ((obj = rdp (key)) != null &&
(duration = Duration.between(now, Instant.now()).toMillis()) < timeout)
to.compareTo(duration = Duration.ofNanos(System.nanoTime()).minus(now)) > 0)
{
try {
this.wait (Math.min(NRD_RESOLUTION, timeout - duration));
this.wait (Math.min(NRD_RESOLUTION, Math.max(to.minus(duration).toMillis(), 1L)));
} catch (InterruptedException ignored) { }
}
return (V) obj;
Expand All @@ -410,14 +413,15 @@ public boolean existAny (Object[] keys) {
return false;
}
public boolean existAny (Object[] keys, long timeout) {
Instant now = Instant.now();
long duration;
while ((duration = Duration.between(now, Instant.now()).toMillis()) < timeout) {
Duration to = Duration.ofMillis(timeout);
Duration now = Duration.ofNanos(System.nanoTime());
Duration duration;
while (to.compareTo(duration = Duration.ofNanos(System.nanoTime()).minus(now)) > 0) {
if (existAny (keys))
return true;
synchronized (this) {
try {
wait (timeout - duration);
wait (Math.max(to.minus(duration).toMillis(), 1L));
} catch (InterruptedException ignored) { }
}
}
Expand Down
5 changes: 2 additions & 3 deletions jpos/src/test/java/org/jpos/space/JDBMSpaceTestCase.java
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Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,6 @@

import java.nio.file.Path;
import java.time.Duration;
import java.time.Instant;

@SuppressWarnings("unchecked")
public class JDBMSpaceTestCase {
Expand Down Expand Up @@ -238,12 +237,12 @@ public void run() {
sp.out ("KA", Boolean.TRUE);
}
}.start();
Instant now = Instant.now();
Duration now = Duration.ofNanos(System.nanoTime());
assertTrue (
sp.existAny(new String[]{"KA", "KB"}, 2000L),
"existAnyWithTimeout ([KA,KB], delay)"
);
long elapsed = Duration.between(now, Instant.now()).toMillis();
long elapsed = Duration.ofNanos(System.nanoTime()).minus(now).toMillis();
assertTrue (elapsed > 900L, "delay was > 1000");
assertNotNull (sp.inp("KA"), "Entry should not be null");
}
Expand Down