guyben 633eb3179a Skip RRS update if existing records are equal to desired records ... This is done first and formost to stop "empty" commits that cause errors in publishDnsUpdates. The reason being that the Cloud DNS api fails when there are no updates at all in a change. Allowing this is a requirement for the writer to be idempotent - if we delete a domain, then run the writer to delete it again - we'll get 0 additions and 0 deletions which fails. This isn't theoretical either - we've seen it happen, causing a publishDnsUpdates to fail over and over again. While fixing this, we also remove all RRS that are common between additions and deletions. This is just an optimization and shouldn't affect behavior. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=179525218		2017-12-27 11:18:21 -05:00
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clouddns	Skip RRS update if existing records are equal to desired records	2017-12-27 11:18:21 -05:00
dnsupdate	Remove unnecessary generic type arguments	2017-11-21 18:17:31 -05:00
BaseDnsWriter.java	Extract multiple commit prevention in DNS writers into a base class	2017-09-20 10:27:17 -04:00
BUILD	Add MOE equivalence for sync on 2016-12-19	2017-01-09 11:59:04 -05:00
DnsWriter.java	Make DnsWriter truly atomic	2017-08-29 16:40:07 -04:00
DnsWriterZone.java	Update copyright year on all license headers	2017-02-02 16:27:22 -05:00
VoidDnsWriter.java	Extract multiple commit prevention in DNS writers into a base class	2017-09-20 10:27:17 -04:00
VoidDnsWriterModule.java	Update copyright year on all license headers	2017-02-02 16:27:22 -05:00