Add metric computation skeleton to statsd.
This cl is to let statsd understand statsd_config, and compute metrics
defined in the config.
+ StatsLogProcessor is given a StatsdConfig (hard coded right now).
We construct a MetricProducer for each of the metric, and the metrics
share Condition and LogEntryMatchers
+ Added the CountMetricProducer type for CountMetric.
We can now count times of SCREEN_ON events given a config.
TODO: 1) conditions are not implemented.
2) slicings are not implemented in CountMetric
3) move the interaction to dropbox to a separate thread
4) decide how the in memory metrics would be used by anomaly detection
Test: manual test.
$ adb shell /system/bin/statsd
$ cat config_file.dat | adb shell cmd stats config
Change-Id: I38f4059c0dc5a827c338131d4a6fa7d4cbe865db
diff --git a/cmds/statsd/src/metrics/MetricProducer.h b/cmds/statsd/src/metrics/MetricProducer.h
new file mode 100644
index 0000000..44a778b
--- /dev/null
+++ b/cmds/statsd/src/metrics/MetricProducer.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef METRIC_PRODUCER_H
+#define METRIC_PRODUCER_H
+
+#include <log/logprint.h>
+#include "../matchers/LogEntryMatcherManager.h"
+
+namespace android {
+namespace os {
+namespace statsd {
+
+// A MetricProducer is responsible for compute one single metrics, creating stats log report, and
+// writing the report to dropbox.
+class MetricProducer {
+public:
+ virtual ~MetricProducer(){};
+
+ // Consume the stats log if it's interesting to this metric.
+ virtual void onMatchedLogEvent(const LogEventWrapper& event) = 0;
+
+ // This is called when the metric collecting is done, e.g., when there is a new configuration
+ // coming. MetricProducer should do the clean up, and dump existing data to dropbox.
+ virtual void finish() = 0;
+
+ virtual void onDumpReport() = 0;
+};
+
+} // namespace statsd
+} // namespace os
+} // namespace android
+#endif // METRIC_PRODUCER_H