Refactor ICANN reporting and billing into common package

This moves the default yearMonth logic into a common ReportingModule, rather than the coarse-scoped BackendModule, which may not want the default parameter extraction logic, as well as moving the 'yearMonth' parameter constant to the common package it's used in. This also provides a basis for future consolidation of the ReportingEmailUtils and BillingEmailUtils classes, which have modest overlap.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=183130311

java/google/registry/reporting/icann/ReportingEmailUtils.java

@@ -0,0 +1,48 @@
+// Copyright 2017 The Nomulus 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 google.registry.reporting.icann;
+
+import google.registry.config.RegistryConfig.Config;
+import google.registry.util.FormattingLogger;
+import google.registry.util.SendEmailService;
+import javax.inject.Inject;
+import javax.mail.Message;
+import javax.mail.Message.RecipientType;
+import javax.mail.internet.InternetAddress;
+
+/** Static utils for emailing reporting results. */
+public class ReportingEmailUtils {
+
+  @Inject @Config("alertSenderEmailAddress") String sender;
+  @Inject @Config("alertRecipientEmailAddress") String recipient;
+  @Inject SendEmailService emailService;
+  @Inject ReportingEmailUtils() {}
+
+  private static final FormattingLogger logger = FormattingLogger.getLoggerForCallerClass();
+
+  void emailResults(String subject, String body) {
+    try {
+      Message msg = emailService.createMessage();
+      logger.infofmt("Emailing %s", recipient);
+      msg.setFrom(new InternetAddress(sender));
+      msg.addRecipient(RecipientType.TO, new InternetAddress(recipient));
+      msg.setSubject(subject);
+      msg.setText(body);
+      emailService.sendMessage(msg);
+    } catch (Exception e) {
+      logger.warning(e, "E-mail service failed.");
+    }
+  }
+}