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// Copyright (c) 2010 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.
//
// CEEE module-wide metrics utilities.
#ifndef CEEE_IE_COMMON_METRICS_UTIL_H__
#define CEEE_IE_COMMON_METRICS_UTIL_H__
#include <atlsafe.h>
#include <string>
#include "base/logging.h"
#include "base/time.h"
#include "base/utf_string_conversions.h"
#include "base/win/scoped_bstr.h"
#include "base/win/windows_version.h"
#include "ceee/ie/broker/broker_rpc_client.h"
namespace metrics_util {
// This is a class that measures the time taken from its construction to its
// destruction. A good way to use it is to instantiate it on the stack.
// TODO(hansl): Make sure the BrokerRpcClient calls from this class are non-
// blocking.
class ScopedTimer {
public:
// Callers must ensure broker_rpc exceeds the life of this object.
ScopedTimer(const std::string name, BrokerRpcClient* broker_rpc)
: name_(name), broker_rpc_(broker_rpc), start_(base::TimeTicks::Now()) {
if (name.length() == 0) {
NOTREACHED() << "Histogram name shouldn't be empty.";
broker_rpc_ = NULL; // Ensure we don't call the broker_rpc.
}
}
~ScopedTimer() {
if (broker_rpc_) {
base::TimeDelta delta = base::TimeTicks::Now() - start_;
if (FAILED(broker_rpc_->SendUmaHistogramTimes(
name_.c_str(), static_cast<int>(delta.InMilliseconds())))) {
NOTREACHED() << "An error happened during RPC.";
}
}
}
void Drop() {
// Something happened and we should not log.
broker_rpc_ = NULL;
}
protected:
base::TimeTicks start_;
// The RPC Client to use when sending events.
BrokerRpcClient* broker_rpc_;
// The name of the event when sending it.
std::string name_;
};
}
#endif // CEEE_IE_COMMON_METRICS_UTIL_H__
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