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Remove all vestiges of memcache

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Memcache is already off but now it's not in the code anymore.

This includes removing domain creation failfast, since that is actually
slower now than just running the flow - all you gain is a non-transactional
read over a transactional read, but the cost is that you always pay that
read, which is going to drive up latency.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=158183506
This commit is contained in:
cgoldfeder 2017-06-06 13:43:42 -07:00 • committed by Ben McIlwain
parent 445faab977
commit ae039aa0d8
37 changed files with 29 additions and 341 deletions
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35
java/google/registry/model/ofy/Ofy.java
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@ -63,15 +63,6 @@ public class Ofy {
private static final FormattingLogger logger = FormattingLogger.getLoggerForCallerClass();
/**
* Recommended memcache expiration time, which is one hour, specified in seconds.
*
* <p>This value should used as a cache expiration time for any entities annotated with an
* Objectify {@code @Cache} annotation, to put an upper bound on unlikely-but-possible divergence
* between memcache and Datastore when a memcache write fails.
*/
public static final int RECOMMENDED_MEMCACHE_EXPIRATION = 3600;
/** Default clock for transactions that don't provide one. */
@NonFinalForTesting
static Clock clock = new SystemClock();
@ -130,31 +121,9 @@ public class Ofy {
checkState(inTransaction(), "Must be called in a transaction");
}
/**
* Load from Datastore, bypassing memcache even when the results might be there.
*
* <p>In general, this is the correct method to use for loads. Loading from memcache can, in rare
* instances, produce a stale result (when a memcache write fails and the previous result is not
* cleared out) and so using memcache should be avoided unless the caller can tolerate staleness
* until the memcache expiration time and there is a specific need for very low latency that is
* worth the extra complexity of reasoning about caching.
*/
/** Load from Datastore. */
public Loader load() {
return ofy().cache(false).load();
}
/**
* Load from Datastore, bypassing memcache even when the results might be there.
*
* <p>In general, prefer {@link #load} over this method. Loading from memcache can, in rare
* instances, produce a stale result (when a memcache write fails and the previous result is not
* cleared out) and so using memcache should be avoided unless the caller can tolerate staleness
* until the memcache expiration time and there is a specific need for very low latency that is
* worth the extra complexity of reasoning about caching.
*/
public Loader loadWithMemcache() {
// TODO(b/27424173): Remove this method if we determine we are ok with no memcache.
return ofy().cache(false).load();
return ofy().load();
}
/**