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Add Runnable overrides to ease use of Java 8 language features

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Runnable and Callable are both @FunctionalInterfaces. The difference is
that Callable requires a return value whereas Runnable does not, so in
situations where we don't care about a return value, rather than having to
add an unnecessary 'return null;' at the end of the lambda, we can simply
use a non-returning Runnable instead.

Unfortunately, owing to legacy reasons, Runnable is not declared to throw
checked exceptions whereas Callable is, so in situations where checked
exceptions are thrown we still need to have a 'return null;' call at the
end.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=172935400
This commit is contained in:
mcilwain 2017-10-20 14:37:48 -07:00 • committed by jianglai
parent d577a281b8
commit 1790914058
13 changed files with 141 additions and 134 deletions
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17
java/google/registry/batch/RefreshDnsOnHostRenameAction.java
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@ -178,10 +178,7 @@ public class RefreshDnsOnHostRenameAction implements Runnable {
}
if (referencingHostKey != null) {
retrier.callWithRetry(
() -> {
dnsQueue.addDomainRefreshTask(domain.getFullyQualifiedDomainName());
return null;
},
() -> dnsQueue.addDomainRefreshTask(domain.getFullyQualifiedDomainName()),
TransientFailureException.class);
logger.infofmt(
"Enqueued DNS refresh for domain %s referenced by host %s.",
@ -242,15 +239,9 @@ public class RefreshDnsOnHostRenameAction implements Runnable {
}
final List<TaskHandle> tasks =
refreshRequests.stream().map(DnsRefreshRequest::task).collect(toImmutableList());
retrier.callWithRetry(
() -> {
queue.deleteTask(tasks);
return null;
},
TransientFailureException.class);
for (DnsRefreshRequest refreshRequest : refreshRequests) {
asyncFlowMetrics.recordAsyncFlowResult(DNS_REFRESH, result, refreshRequest.requestedTime());
}
retrier.callWithRetry(() -> queue.deleteTask(tasks), TransientFailureException.class);
refreshRequests.forEach(
r -> asyncFlowMetrics.recordAsyncFlowResult(DNS_REFRESH, result, r.requestedTime()));
}
/** A class that encapsulates the values of a request to refresh DNS for a renamed host. */