New architecture of the activity logging: Policies for summarization (and compression)

chrome/browser/extensions/activity_log/fullstream_ui_policy.h

+// Copyright 2013 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.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_ACTIVITY_LOG_FULLSTREAM_UI_POLICY_H_
+#define CHROME_BROWSER_EXTENSIONS_ACTIVITY_LOG_FULLSTREAM_UI_POLICY_H_
+
+#include <string>
+#include <vector>
+#include "chrome/browser/extensions/activity_log/activity_log_policy.h"
+
+class GURL;
+
+namespace extensions {
+
+class ActivityDatabase;
+
+// A policy for logging the full stream of actions, including all arguments.
+// It's mostly intended to be used in testing and analysis.
+class FullStreamUIPolicy : public ActivityLogPolicy {
+ public:
+  // For more info about these member functions, see the super class.
+  explicit FullStreamUIPolicy(Profile* profile);
+
+  virtual ~FullStreamUIPolicy();
+
+  virtual void ProcessAction(ActionType action_type,
+                             const std::string& extension_id,
+                             const std::string& name, const GURL& gurl,
+                             const base::ListValue* args,
+                             const base::DictionaryValue* details) OVERRIDE;
+
+  virtual void SaveState() OVERRIDE {}
+
+  // TODO(felt,dbabic) This is overly specific to FullStreamUIPolicy.
+  // It assumes that the callback can return a sorted vector of actions.  Some
+  // policies might not do that.  For instance, imagine a trivial policy that
+  // just counts the frequency of certain actions within some time period,
+  // this call would be meaningless, as it couldn't return anything useful.
+  virtual void ReadData(
+      const std::string& extension_id,
+      const int day,
+      const base::Callback
+          <void(scoped_ptr<std::vector<scoped_refptr<Action> > >)>& callback)
+      const OVERRIDE;
+
+  virtual void SetSaveStateOnRequestOnly() OVERRIDE;
+
+  // Returns the actual key for a given key type
+  virtual std::string GetKey(ActivityLogPolicy::KeyType key_id) const OVERRIDE;
+
+ protected:
+  // Concatenates arguments
+  virtual std::string ProcessArguments(ActionType action_type,
+                                       const std::string& name,
+                                       const base::ListValue* args) const;
+
+  virtual void ProcessWebRequestModifications(
+      base::DictionaryValue& details,
+      std::string& details_string) const;
+
+  // We initialize this on the same thread as the ActivityLog and policy, but
+  // then subsequent operations occur on the DB thread. Instead of destructing
+  // the ActivityDatabase, we call its Close() method on the DB thread and it
+  // commits suicide.
+  ActivityDatabase* db_;
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_ACTIVITY_LOG_FULLSTREAM_UI_POLICY_H_