Cronet API Refactoring

components/cronet/android/chromium_url_request_context.cc

-// Copyright 2014 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 "components/cronet/android/chromium_url_request_context.h"
-
-#include <memory>
-#include <string>
-#include <utility>
-
-#include "base/android/jni_android.h"
-#include "base/android/jni_string.h"
-#include "base/json/json_reader.h"
-#include "base/logging.h"
-#include "base/metrics/statistics_recorder.h"
-#include "base/values.h"
-#include "components/cronet/android/chromium_url_request.h"
-#include "components/cronet/android/url_request_adapter.h"
-#include "components/cronet/android/url_request_context_adapter.h"
-#include "components/cronet/url_request_context_config.h"
-#include "jni/ChromiumUrlRequestContext_jni.h"
-
-using base::android::ConvertUTF8ToJavaString;
-using base::android::ConvertJavaStringToUTF8;
-using base::android::JavaParamRef;
-using base::android::ScopedJavaLocalRef;
-
-namespace {
-
-// Delegate of URLRequestContextAdapter that delivers callbacks to the Java
-// layer.
-class JniURLRequestContextAdapterDelegate
-    : public cronet::URLRequestContextAdapter::
-          URLRequestContextAdapterDelegate {
- public:
-  JniURLRequestContextAdapterDelegate(JNIEnv* env, jobject owner)
-      : owner_(env->NewGlobalRef(owner)) {}
-
-  void OnContextInitialized(
-      cronet::URLRequestContextAdapter* context_adapter) override {
-    JNIEnv* env = base::android::AttachCurrentThread();
-    cronet::Java_ChromiumUrlRequestContext_initNetworkThread(env, owner_);
-    // TODO(dplotnikov): figure out if we need to detach from the thread.
-    // The documentation says we should detach just before the thread exits.
-  }
-
- protected:
-  ~JniURLRequestContextAdapterDelegate() override {
-    JNIEnv* env = base::android::AttachCurrentThread();
-    env->DeleteGlobalRef(owner_);
-  }
-
- private:
-  jobject owner_;
-};
-
-}  // namespace
-
-namespace cronet {
-
-// Explicitly register static JNI functions.
-bool ChromiumUrlRequestContextRegisterJni(JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}
-
-// Sets global user-agent to be used for all subsequent requests.
-static jlong CreateRequestContextAdapter(
-    JNIEnv* env,
-    const JavaParamRef<jobject>& jcaller,
-    const JavaParamRef<jstring>& juser_agent,
-    jint jlog_level,
-    jlong jconfig) {
-  std::string user_agent = ConvertJavaStringToUTF8(env, juser_agent);
-
-  std::unique_ptr<URLRequestContextConfig> context_config(
-      reinterpret_cast<URLRequestContextConfig*>(jconfig));
-
-  // TODO(mef): MinLogLevel is global, shared by all URLRequestContexts.
-  // Revisit this if each URLRequestContext would need an individual log level.
-  logging::SetMinLogLevel(static_cast<int>(jlog_level));
-
-  // TODO(dplotnikov): set application context.
-  URLRequestContextAdapter* context_adapter = new URLRequestContextAdapter(
-      new JniURLRequestContextAdapterDelegate(env, jcaller), user_agent);
-  context_adapter->AddRef();  // Hold onto this ref-counted object.
-  context_adapter->Initialize(std::move(context_config));
-  return reinterpret_cast<jlong>(context_adapter);
-}
-
-// Releases native objects.
-static void ReleaseRequestContextAdapter(JNIEnv* env,
-                                         const JavaParamRef<jobject>& jcaller,
-                                         jlong jurl_request_context_adapter) {
-  URLRequestContextAdapter* context_adapter =
-      reinterpret_cast<URLRequestContextAdapter*>(jurl_request_context_adapter);
-  // TODO(mef): Revisit this from thread safety point of view: Can we delete a
-  // thread while running on that thread?
-  // URLRequestContextAdapter is a ref-counted object, and may have pending
-  // tasks,
-  // so we need to release it instead of deleting here.
-  context_adapter->Release();
-}
-
-// Starts recording statistics.
-static void InitializeStatistics(JNIEnv* env,
-                                 const JavaParamRef<jobject>& jcaller) {
-  base::StatisticsRecorder::Initialize();
-}
-
-// Gets current statistics with |jfilter| as a substring as JSON text (an empty
-// |jfilter| will include all registered histograms).
-static ScopedJavaLocalRef<jstring> GetStatisticsJSON(
-    JNIEnv* env,
-    const JavaParamRef<jobject>& jcaller,
-    const JavaParamRef<jstring>& jfilter) {
-  std::string query = ConvertJavaStringToUTF8(env, jfilter);
-  std::string json = base::StatisticsRecorder::ToJSON(query);
-  return ConvertUTF8ToJavaString(env, json);
-}
-
-// Starts recording NetLog into file with |jfilename|.
-static void StartNetLogToFile(JNIEnv* env,
-                              const JavaParamRef<jobject>& jcaller,
-                              jlong jurl_request_context_adapter,
-                              const JavaParamRef<jstring>& jfilename,
-                              jboolean jlog_all) {
-  URLRequestContextAdapter* context_adapter =
-      reinterpret_cast<URLRequestContextAdapter*>(jurl_request_context_adapter);
-  std::string filename = ConvertJavaStringToUTF8(env, jfilename);
-  context_adapter->StartNetLogToFile(filename, jlog_all);
-}
-
-// Stops recording NetLog.
-static void StopNetLog(JNIEnv* env,
-                       const JavaParamRef<jobject>& jcaller,
-                       jlong jurl_request_context_adapter) {
-  URLRequestContextAdapter* context_adapter =
-      reinterpret_cast<URLRequestContextAdapter*>(jurl_request_context_adapter);
-  context_adapter->StopNetLog();
-}
-
-// Called on application's main Java thread.
-static void InitRequestContextOnMainThread(JNIEnv* env,
-                                           const JavaParamRef<jobject>& jcaller,
-                                           jlong jurl_request_context_adapter) {
-  URLRequestContextAdapter* context_adapter =
-      reinterpret_cast<URLRequestContextAdapter*>(jurl_request_context_adapter);
-  context_adapter->InitRequestContextOnMainThread();
-}
-
-}  // namespace cronet