1 files changed, 89 insertions, 0 deletions
diff --git a/cmds/statsd/src/external/StatsPuller.cpp b/cmds/statsd/src/external/StatsPuller.cpp
new file mode 100644
index 000000000000..fc0ad7c5c3fc
--- /dev/null
+++ b/cmds/statsd/src/external/StatsPuller.cpp
@@ -0,0 +1,89 @@
+/*
+ * 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 DEBUG false  // STOPSHIP if true
+#include "Log.h"
+
+#include "StatsPuller.h"
+#include "guardrail/StatsdStats.h"
+#include "puller_util.h"
+
+namespace android {
+namespace os {
+namespace statsd {
+
+using std::lock_guard;
+
+sp<UidMap> StatsPuller::mUidMap = nullptr;
+void StatsPuller::SetUidMap(const sp<UidMap>& uidMap) { mUidMap = uidMap; }
+
+// ValueMetric has a minimum bucket size of 10min so that we don't pull too frequently
+StatsPuller::StatsPuller(const int tagId)
+    : mTagId(tagId) {
+    if (StatsdStats::kPullerCooldownMap.find(tagId) == StatsdStats::kPullerCooldownMap.end()) {
+        mCoolDownSec = StatsdStats::kDefaultPullerCooldown;
+    } else {
+        mCoolDownSec = StatsdStats::kPullerCooldownMap[tagId];
+    }
+    VLOG("Puller for tag %d created. Cooldown set to %ld", mTagId, mCoolDownSec);
+}
+
+bool StatsPuller::Pull(std::vector<std::shared_ptr<LogEvent>>* data) {
+    lock_guard<std::mutex> lock(mLock);
+    StatsdStats::getInstance().notePull(mTagId);
+    long curTime = time(nullptr);
+    if (curTime - mLastPullTimeSec < mCoolDownSec) {
+        (*data) = mCachedData;
+        StatsdStats::getInstance().notePullFromCache(mTagId);
+        return true;
+    }
+    if (mMinPullIntervalSec > curTime - mLastPullTimeSec) {
+        mMinPullIntervalSec = curTime - mLastPullTimeSec;
+        StatsdStats::getInstance().updateMinPullIntervalSec(mTagId, mMinPullIntervalSec);
+    }
+    mCachedData.clear();
+    mLastPullTimeSec = curTime;
+    bool ret = PullInternal(&mCachedData);
+    if (ret) {
+      mergeIsolatedUidsToHostUid(mCachedData, mUidMap, mTagId);
+      (*data) = mCachedData;
+    }
+    return ret;
+}
+
+int StatsPuller::ForceClearCache() {
+    return clearCache();
+}
+
+int StatsPuller::clearCache() {
+    lock_guard<std::mutex> lock(mLock);
+    int ret = mCachedData.size();
+    mCachedData.clear();
+    mLastPullTimeSec = 0;
+    return ret;
+}
+
+int StatsPuller::ClearCacheIfNecessary(long timestampSec) {
+    if (timestampSec - mLastPullTimeSec > mCoolDownSec) {
+        return clearCache();
+    } else {
+        return 0;
+    }
+}
+
+}  // namespace statsd
+}  // namespace os
+}  // namespace android