1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef NET_BASE_TRACE_NET_LOG_OBSERVER_H_ 6 #define NET_BASE_TRACE_NET_LOG_OBSERVER_H_ 7 8 #include "base/debug/trace_event_impl.h" 9 #include "base/macros.h" 10 #include "net/base/net_export.h" 11 #include "net/base/net_log.h" 12 13 namespace net { 14 15 // TraceNetLogObserver watches for TraceLog enable, and sends NetLog 16 // events to TraceLog if it is enabled. 17 class NET_EXPORT TraceNetLogObserver 18 : public NetLog::ThreadSafeObserver, 19 public base::debug::TraceLog::EnabledStateObserver { 20 public: 21 TraceNetLogObserver(); 22 virtual ~TraceNetLogObserver(); 23 24 // net::NetLog::ThreadSafeObserver implementation: 25 virtual void OnAddEntry(const NetLog::Entry& entry) OVERRIDE; 26 27 // Start to watch for TraceLog enable and disable events. 28 // This can't be called if already watching for events. 29 // Watches NetLog only when tracing is enabled. 30 void WatchForTraceStart(NetLog* net_log); 31 32 // Stop watching for TraceLog enable and disable events. 33 // If WatchForTraceStart is called, this must be called before 34 // TraceNetLogObserver is destroyed. 35 void StopWatchForTraceStart(); 36 37 // base::debug::TraceLog::EnabledStateChangedObserver implementation: 38 virtual void OnTraceLogEnabled() OVERRIDE; 39 virtual void OnTraceLogDisabled() OVERRIDE; 40 41 private: 42 NetLog* net_log_to_watch_; 43 44 DISALLOW_COPY_AND_ASSIGN(TraceNetLogObserver); 45 }; 46 47 } // namespace net 48 49 #endif // NET_BASE_TRACE_NET_LOG_OBSERVER_H_ 50
