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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/launch/launch_queue.h"
#include "base/metrics/histogram_functions.h"
#include "base/time/time.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_launch_consumer.h"
#include "third_party/blink/renderer/modules/launch/launch_params.h"
namespace blink {
LaunchQueue::LaunchQueue() = default;
LaunchQueue::~LaunchQueue() = default;
void LaunchQueue::Enqueue(LaunchParams* params) {
if (!consumer_) {
unconsumed_launch_params_.push_back(params);
return;
}
MeasureLatencyFromBrowserProcess(params->time_navigation_started_in_browser(),
params->navigation_started());
consumer_->InvokeAndReportException(nullptr, params);
}
void LaunchQueue::setConsumer(V8LaunchConsumer* consumer) {
consumer_ = consumer;
// Consume all launch params now we have a consumer.
while (!unconsumed_launch_params_.empty()) {
// Get the first launch params and the queue and remove it before invoking
// the consumer, in case the consumer calls |setConsumer|. Each launchParams
// should be consumed by the most recently set consumer.
LaunchParams* params = unconsumed_launch_params_.at(0);
unconsumed_launch_params_.EraseAt(0);
MeasureLatencyFromBrowserProcess(
params->time_navigation_started_in_browser(),
params->navigation_started());
consumer_->InvokeAndReportException(nullptr, params);
}
}
void LaunchQueue::Trace(Visitor* visitor) const {
visitor->Trace(unconsumed_launch_params_);
visitor->Trace(consumer_);
ScriptWrappable::Trace(visitor);
}
void LaunchQueue::MeasureLatencyFromBrowserProcess(
const base::TimeTicks time_navigation_started_in_browser,
bool navigation_started) {
if (time_navigation_started_in_browser.is_null()) {
return;
}
base::TimeDelta time_to_navigate =
base::TimeTicks::Now() - time_navigation_started_in_browser;
base::UmaHistogramMediumTimes(
"Webapp.NavigationCapturing.LaunchParamsConsumedTime", time_to_navigate);
std::string histogram_variant =
navigation_started ? ".WithNavigation" : ".WithoutNavigation";
std::string histogram_name =
base::StrCat({"WebApp.NavigationCapturing.LaunchParamsConsumedTime",
histogram_variant});
base::UmaHistogramMediumTimes(histogram_name, time_to_navigate);
}
} // namespace blink
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