[TTS] Write initial Tap-features to Ranker.

chrome/browser/android/contextualsearch/contextual_search_ranker_logger_impl.cc

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <chrome/browser/android/contextualsearch/contextual_search_ranker_logger_impl.h>
+
+#include "base/android/jni_string.h"
+#include "base/android/scoped_java_ref.h"
+#include "base/metrics/metrics_hashes.h"
+#include "chrome/browser/browser_process.h"
+#include "components/keyed_service/core/keyed_service.h"
+#include "components/ukm/ukm_entry_builder.h"
+#include "components/ukm/ukm_service.h"
+#include "jni/ContextualSearchRankerLoggerImpl_jni.h"
+
+ContextualSearchRankerLoggerImpl::ContextualSearchRankerLoggerImpl(
+    JNIEnv* env,
+    jobject obj) {
+  java_object_.Reset(env, obj);
+}
+
+ContextualSearchRankerLoggerImpl::~ContextualSearchRankerLoggerImpl() {
+  java_object_ = nullptr;
+}
+
+void ContextualSearchRankerLoggerImpl::SetUkmServiceAndUrls(
+    JNIEnv* env,
+    jobject obj,
+    const base::android::JavaParamRef<jstring>& j_base_page_url,
+    const base::android::JavaParamRef<jstring>& j_model_url) {
+  GURL page_url =
+      GURL(base::android::ConvertJavaStringToUTF8(env, j_base_page_url));
+  std::string model_url =
+      base::android::ConvertJavaStringToUTF8(env, j_model_url);
+  ukm::UkmService* ukm_service = g_browser_process->ukm_service();
+  SetUkmService(ukm_service, page_url);
+  // TODO(donnd): Is this a reasonable way to handle the model URL?
+  builder_->AddMetric("ContextualSearchModelUrl",
+                      base::HashMetricName(model_url));

[Theresa, 2017/05/12 01:02:25]

Should we change model URL to model name or something similar to help
distinguish it from the base_page_url?

[Donn Denman, 2017/05/12 23:08:55]

Good suggestion -- I think I like "model selector".  Done.

+}
+
+void ContextualSearchRankerLoggerImpl::SetUkmService(
+    ukm::UkmService* ukm_service,
+    const GURL& page_url) {
+  ukm_service_ = ukm_service;
+  DVLOG(0) << "ctxs Setting up UKM for url: " << page_url.spec();
+  source_id_ = ukm_service_->GetNewSourceID();
+  ukm_service_->UpdateSourceURL(source_id_, page_url);
+  builder_ = ukm_service_->GetEntryBuilder(source_id_, "ContextualSearch");
+}
+
+void ContextualSearchRankerLoggerImpl::LogLong(
+    JNIEnv* env,
+    jobject obj,
+    const base::android::JavaParamRef<jstring>& j_feature,
+    jlong j_long) {
+  std::string feature = base::android::ConvertJavaStringToUTF8(env, j_feature);
+  DVLOG(0) << "Logging feature " << feature << " value " << j_long;
+  builder_->AddMetric(feature.c_str(), j_long);
+}
+
+void ContextualSearchRankerLoggerImpl::LogString(
+    JNIEnv* env,
+    jobject obj,
+    const base::android::JavaParamRef<jstring>& j_feature,
+    const base::android::JavaParamRef<jstring>& j_string) {
+  std::string feature = base::android::ConvertJavaStringToUTF8(env, j_feature);
+  std::string string = base::android::ConvertJavaStringToUTF8(env, j_string);
+  DVLOG(0) << "Logging feature " << feature << " value " << string;
+  builder_->AddMetric(feature.c_str(), base::HashMetricName(string));
+}
+
+void ContextualSearchRankerLoggerImpl::WriteLogAndReset(JNIEnv* env,
+                                                        jobject obj) {
+  // Set up another builder for the next record (in case it's needed).
+  builder_ = ukm_service_->GetEntryBuilder(source_id_, "ContextualSearch");
+  DVLOG(0) << "Creating a new record builder";

[Theresa, 2017/05/12 01:02:25]

We should probably remove these before landing since they're just for debugging,
right?

[Donn Denman, 2017/05/12 23:08:55]

I think they're OK since they're debug-only, and the feature is off by default. 
But let me know if that doesn't sound fine to you!

+}
+
+// Java wrapper boilerplate
+
+void ContextualSearchRankerLoggerImpl::Destroy(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jobject>& obj) {
+  delete this;
+}
+
+bool RegisterContextualSearchRankerLoggerImpl(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+jlong Init(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj) {
+  ContextualSearchRankerLoggerImpl* ranker_logger_impl =
+      new ContextualSearchRankerLoggerImpl(env, obj);
+  return reinterpret_cast<intptr_t>(ranker_logger_impl);
+}