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Make our Clock util Serializable

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It doesn't entirely make semantic sense, since the actual state of the
SystemClock isn't being preserved, but it makes injection into serializable
classes (e.g. mapreduces) much simpler, so it's worth doing.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=201755949
This commit is contained in:
mcilwain 2018-06-22 16:04:36 -07:00 • committed by Ben McIlwain
parent 481790bc91
commit 7d3cb3d426
4 changed files with 18 additions and 19 deletions
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20
java/google/registry/request/lock/LockHandlerImpl.java
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@ -27,8 +27,6 @@ import google.registry.model.server.Lock;
import google.registry.util.AppEngineTimeLimiter;
import google.registry.util.Clock;
import google.registry.util.RequestStatusChecker;
import google.registry.util.SystemClock;
import java.io.Serializable;
import java.util.HashSet;
import java.util.Optional;
import java.util.Set;
@ -42,16 +40,16 @@ import org.joda.time.DateTime;
import org.joda.time.Duration;
/** Implementation of {@link LockHandler} that uses the datastore lock. */
public class LockHandlerImpl implements LockHandler, Serializable {
public class LockHandlerImpl implements LockHandler {
private static final long serialVersionUID = 5162259753801400985L;
private static final long serialVersionUID = 5746905970040002524L;
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
/** Fudge factor to make sure we kill threads before a lock actually expires. */
private static final Duration LOCK_TIMEOUT_FUDGE = Duration.standardSeconds(5);
private final RequestStatusChecker requestStatusChecker;
@Nullable private transient Clock clock;
private final Clock clock;
@Inject
public LockHandlerImpl(RequestStatusChecker requestStatusChecker, Clock clock) {
@ -59,14 +57,6 @@ public class LockHandlerImpl implements LockHandler, Serializable {
this.clock = clock;
}
private synchronized Clock getClock() {
// Re-set the clock on first use after de-serialization
if (clock == null) {
clock = new SystemClock();
}
return clock;
}
/**
* Acquire one or more locks and execute a Void {@link Callable}.
*
@ -83,7 +73,7 @@ public class LockHandlerImpl implements LockHandler, Serializable {
@Nullable String tld,
Duration leaseLength,
String... lockNames) {
DateTime startTime = getClock().nowUtc();
DateTime startTime = clock.nowUtc();
String sanitizedTld = Strings.emptyToNull(tld);
try {
return AppEngineTimeLimiter.create()
@ -100,7 +90,7 @@ public class LockHandlerImpl implements LockHandler, Serializable {
"Execution on locks '%s' for TLD '%s' timed out after %s; started at %s",
Joiner.on(", ").join(lockNames),
Optional.ofNullable(sanitizedTld).orElse("(null)"),
new Duration(startTime, getClock().nowUtc()),
new Duration(startTime, clock.nowUtc()),
startTime),
cause);
}