mv com/google/domain/registry google/registry

This change renames directories in preparation for the great package
rename. The repository is now in a broken state because the code
itself hasn't been updated. However this should ensure that git
correctly preserves history for each file.

java/google/registry/dns/writer/api/DnsWriter.java

@@ -0,0 +1,55 @@
+// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.domain.registry.dns.writer.api;
+
+/**
+ * Transaction object for sending an atomic batch of updates for a single zone to the DNS server.
+ *
+ * <p>Here's an example of how you would publish updates for a domain and host:
+ * <pre>
+ * &#064;Inject Provider&lt;DnsWriter&gt; dnsWriter;
+ * try (DnsWriter writer = dnsWriter.get()) {
+ *   writer.publishDomain(domainName);
+ *   writer.publishHost(hostName);
+ * }
+ * </pre>
+ */
+public interface DnsWriter extends AutoCloseable {
+
+  /**
+   * Loads {@code domainName} from datastore and publishes its NS/DS records to the DNS server.
+   * Replaces existing records for the exact name supplied with an NS record for each name server
+   * and a DS record for each delegation signer stored in the registry for the supplied domain name.
+   * If the domain is deleted or is in a "non-publish" state then any existing records are deleted.
+   *
+   * @param domainName the fully qualified domain name, with no trailing dot
+   */
+  void publishDomain(String domainName);
+
+  /**
+   * Loads {@code hostName} from datastore and publishes its A/AAAA glue records to the DNS server.
+   * Replaces existing records for the exact name supplied, with an A or AAAA record (as
+   * appropriate) for each address stored in the registry, for the supplied host name. If the host is
+   * deleted then the existing records are deleted. Assumes that this method will only be called for
+   * in-bailiwick hosts. The registry does not have addresses for other hosts.
+   *
+   * @param hostName the fully qualified host name, with no trailing dot
+   */
+  void publishHost(String hostName);
+
+  /** Commits the updates to the DNS server atomically. */
+  @Override
+  void close();
+}