[TeX] Introduced Telemetry Express Native Logging Library

- added support C++ TeX Counter logging API

Bug: 258868665
Test: build
Change-Id: I86ae4335c89196708d4174dd5613ddc89622b17c

4 files changed, 150 insertions, 0 deletions

diff --git a/libstats/expresslog/.clang-format b/libstats/expresslog/.clang-format
new file mode 100644
index 000000000..cead3a079
--- /dev/null
+++ b/libstats/expresslog/.clang-format
@@ -0,0 +1,17 @@
+BasedOnStyle: Google
+AllowShortIfStatementsOnASingleLine: true
+AllowShortFunctionsOnASingleLine: false
+AllowShortLoopsOnASingleLine: true
+BinPackArguments: true
+BinPackParameters: true
+ColumnLimit: 100
+CommentPragmas: NOLINT:.*
+ContinuationIndentWidth: 8
+DerivePointerAlignment: false
+IndentWidth: 4
+PointerAlignment: Left
+TabWidth: 4
+AccessModifierOffset: -4
+IncludeCategories:
+  - Regex:    '^"Log\.h"'
+    Priority:    -1
diff --git a/libstats/expresslog/Android.bp b/libstats/expresslog/Android.bp
new file mode 100644
index 000000000..9cdc2c30a
--- /dev/null
+++ b/libstats/expresslog/Android.bp
@@ -0,0 +1,71 @@
+
+//
+// Copyright (C) 2023 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.
+//
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_library {
+    name: "libexpresslog",
+    srcs: [
+        "Counter.cpp",
+    ],
+    cflags: [
+        "-DNAMESPACE_FOR_HASH_FUNCTIONS=farmhash",
+        "-Wall",
+        "-Werror",
+    ],
+    header_libs: [
+        "libtextclassifier_hash_headers",
+    ],
+    static_libs: [
+        "libstatslog_express",
+        "libtextclassifier_hash_static",
+    ],
+    shared_libs: [
+        "libbase",
+        "libstatssocket",
+    ],
+    export_include_dirs: ["include"],
+}
+
+genrule {
+    name: "statslog_express.h",
+    tools: ["stats-log-api-gen"],
+    cmd: "$(location stats-log-api-gen) --header $(genDir)/statslog_express.h --module expresslog --namespace android,expresslog",
+    out: [
+        "statslog_express.h",
+    ],
+}
+
+genrule {
+    name: "statslog_express.cpp",
+    tools: ["stats-log-api-gen"],
+    cmd: "$(location stats-log-api-gen) --cpp $(genDir)/statslog_express.cpp --module expresslog --namespace android,expresslog --importHeader statslog_express.h",
+    out: [
+        "statslog_express.cpp",
+    ],
+}
+
+cc_library_static {
+    name: "libstatslog_express",
+    generated_sources: ["statslog_express.cpp"],
+    generated_headers: ["statslog_express.h"],
+    export_generated_headers: ["statslog_express.h"],
+    shared_libs: [
+        "libstatssocket",
+    ],
+}
diff --git a/libstats/expresslog/Counter.cpp b/libstats/expresslog/Counter.cpp
new file mode 100644
index 000000000..bee130344
--- /dev/null
+++ b/libstats/expresslog/Counter.cpp
@@ -0,0 +1,32 @@
+//
+// Copyright (C) 2023 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.
+//
+
+#include "include/Counter.h"
+
+#include <statslog_express.h>
+#include <string.h>
+#include <utils/hash/farmhash.h>
+
+namespace android {
+namespace expresslog {
+
+void Counter::logIncrement(const char* metricName, int64_t amount) {
+    const int64_t metricIdHash = farmhash::Fingerprint64(metricName, strlen(metricName));
+    stats_write(EXPRESS_EVENT_REPORTED, metricIdHash, amount);
+}
+
+}  // namespace expresslog
+}  // namespace android
diff --git a/libstats/expresslog/include/Counter.h b/libstats/expresslog/include/Counter.h
new file mode 100644
index 000000000..57328f51b
--- /dev/null
+++ b/libstats/expresslog/include/Counter.h
@@ -0,0 +1,30 @@
+//
+// Copyright (C) 2023 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.
+//
+
+#pragma once
+#include <stdint.h>
+
+namespace android {
+namespace expresslog {
+
+/** Counter encapsulates StatsD write API calls */
+class Counter final {
+public:
+    static void logIncrement(const char* metricId, int64_t amount = 1);
+};
+
+}  // namespace expresslog
+}  // namespace android