Import code from internal repository to git

java/com/google/domain/registry/monitoring/whitebox/Metrics.java

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+// Copyright 2016 Google Inc. 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.monitoring.whitebox;
+
+import static com.google.appengine.api.taskqueue.QueueFactory.getQueue;
+import static com.google.appengine.api.taskqueue.TaskOptions.Builder.withUrl;
+import static com.google.domain.registry.bigquery.BigqueryUtils.toBigqueryTimestamp;
+
+import com.google.appengine.api.taskqueue.TaskOptions;
+import com.google.appengine.api.taskqueue.TransientFailureException;
+import com.google.common.base.Supplier;
+import com.google.domain.registry.util.Clock;
+import com.google.domain.registry.util.FormattingLogger;
+import com.google.domain.registry.util.NonFinalForTesting;
+import com.google.domain.registry.util.SystemClock;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+
+/** A collector of metric information. */
+abstract class Metrics {
+
+  private static final FormattingLogger logger = FormattingLogger.getLoggerForCallerClass();
+
+  public static final String QUEUE = "bigquery-streaming-metrics";
+
+  @NonFinalForTesting
+  private static Clock clock = new SystemClock();
+
+  @NonFinalForTesting
+  private static Supplier<String> idGenerator =
+      new Supplier<String>() {
+        @Override
+        public String get() {
+          return UUID.randomUUID().toString();
+        }};
+
+  protected final Map<String, Object> fields = new HashMap<>();
+
+  private final long startTimeMillis = clock.nowUtc().getMillis();
+
+  public void setTableId(String tableId) {
+    fields.put("tableId", tableId);
+  }
+
+  public void export() {
+    try {
+      TaskOptions opts = withUrl("/_dr/task/metrics")
+          .param("insertId", idGenerator.get())
+          .param("startTime", toBigqueryTimestamp(startTimeMillis, TimeUnit.MILLISECONDS))
+          .param("endTime", toBigqueryTimestamp(clock.nowUtc().getMillis(), TimeUnit.MILLISECONDS));
+      for (Entry<String, Object> entry : fields.entrySet()) {
+        opts.param(entry.getKey(), String.valueOf(entry.getValue()));
+      }
+      getQueue(QUEUE).add(opts);
+    } catch (TransientFailureException e) {
+      // Log and swallow. We may drop some metrics here but this should be rare.
+      logger.info(e, e.getMessage());
+    }
+  }
+}