StatsCompanionService connection to Statsd
Created AnomalyMonitor in statsd, which can monitor statsd's internal
anomaly alarms and register the soonest one with the
StatsCompanionService.
This cl introduces the AnomalyMonitor and allows it to register alarms.
It does not yet allow for the removal of internal alarms.
Test: manually added alarms and ensured they were correctly registered
in StatsCompanionService
Change-Id: Iff324c73751c4f43b1507dc64649b50ac388adef
diff --git a/cmds/statsd/src/AnomalyMonitor.cpp b/cmds/statsd/src/AnomalyMonitor.cpp
new file mode 100644
index 0000000..8338d50
--- /dev/null
+++ b/cmds/statsd/src/AnomalyMonitor.cpp
@@ -0,0 +1,112 @@
+/*
+ * 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.
+ */
+
+#define LOG_TAG "AnomalyMonitor"
+#define DEBUG true
+
+#include <AnomalyMonitor.h>
+
+#include <binder/IServiceManager.h>
+#include <cutils/log.h>
+
+namespace statsd {
+
+AnomalyMonitor::AnomalyMonitor(uint32_t minDiffToUpdateRegisteredAlarmTimeSec)
+ : mRegisteredAlarmTimeSec(0),
+ mMinUpdateTimeSec(minDiffToUpdateRegisteredAlarmTimeSec) {
+}
+
+AnomalyMonitor::~AnomalyMonitor() {
+}
+
+void AnomalyMonitor::add(sp<const AnomalyAlarm> alarm) {
+ if (alarm == nullptr) {
+ ALOGW("Asked to add a null alarm.");
+ return;
+ }
+ if (alarm->timestampSec < 1) {
+ // forbidden since a timestamp 0 is used to indicate no alarm registered
+ ALOGW("Asked to add a 0-time alarm.");
+ return;
+ }
+ std::lock_guard<std::mutex> lock(mLock);
+ // TODO: Ensure that refractory period is respected.
+ if (DEBUG) ALOGD("Adding alarm with time %u", alarm->timestampSec);
+ mPq.push(alarm);
+ if (mRegisteredAlarmTimeSec < 1 ||
+ alarm->timestampSec + mMinUpdateTimeSec < mRegisteredAlarmTimeSec) {
+ updateRegisteredAlarmTime(alarm->timestampSec);
+ }
+}
+
+void AnomalyMonitor::remove(sp<const AnomalyAlarm> alarm) {
+ if (alarm == nullptr) {
+ ALOGW("Asked to remove a null alarm.");
+ return;
+ }
+ std::lock_guard<std::mutex> lock(mLock);
+ if (DEBUG) ALOGD("Removing alarm with time %u", alarm->timestampSec);
+ // TODO: make priority queue able to have items removed from it !!!
+ // mPq.remove(alarm);
+ if (mPq.empty()) {
+ if (DEBUG) ALOGD("Queue is empty. Cancel any alarm.");
+ mRegisteredAlarmTimeSec = 0;
+ // TODO: Make this resistant to doing work when companion is not ready yet
+ sp<IStatsCompanionService> statsCompanionService = getStatsCompanion_l();
+ if (statsCompanionService != nullptr) {
+ statsCompanionService->cancelAnomalyAlarm();
+ }
+ return;
+ }
+ uint32_t soonestAlarmTimeSec = mPq.top()->timestampSec;
+ if (DEBUG) ALOGD("Soonest alarm is %u", soonestAlarmTimeSec);
+ if (soonestAlarmTimeSec > mRegisteredAlarmTimeSec + mMinUpdateTimeSec) {
+ updateRegisteredAlarmTime(soonestAlarmTimeSec);
+ }
+}
+
+void AnomalyMonitor::updateRegisteredAlarmTime(uint32_t timestampSec) {
+ if (DEBUG) ALOGD("Updating reg alarm time to %u", timestampSec);
+ mRegisteredAlarmTimeSec = timestampSec;
+ sp<IStatsCompanionService> statsCompanionService = getStatsCompanion_l();
+ if (statsCompanionService != nullptr) {
+ statsCompanionService->setAnomalyAlarm(secToMs(mRegisteredAlarmTimeSec));
+ }
+}
+
+sp<IStatsCompanionService> AnomalyMonitor::getStatsCompanion_l() {
+ if (mStatsCompanion != nullptr) {
+ return mStatsCompanion;
+ }
+ // Get statscompanion service from service manager
+ const sp<IServiceManager> sm(defaultServiceManager());
+ if (sm != nullptr) {
+ const String16 name("statscompanion");
+ mStatsCompanion =
+ interface_cast<IStatsCompanionService>(sm->checkService(name));
+ if (mStatsCompanion == nullptr) {
+ ALOGW("statscompanion service unavailable!");
+ return nullptr;
+ }
+ }
+ return mStatsCompanion;
+}
+
+int64_t AnomalyMonitor::secToMs(uint32_t timeSec) {
+ return ((int64_t) timeSec) * 1000;
+}
+
+} // namespace statsd
\ No newline at end of file