NetLogEventParameter to Callback refactoring 2.

net/disk_cache/net_log_parameters.h

 // Copyright (c) 2012 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 NET_DISK_CACHE_NET_LOG_PARAMETERS_H_
 #define NET_DISK_CACHE_NET_LOG_PARAMETERS_H_
 #pragma once
 
 #include <string>
 
 #include "net/base/net_log.h"
 
-// This file contains a set of NetLog::EventParameters shared by EntryImpls and
-// MemEntryImpls.
+// This file contains a set of functions to create NetLog::ParametersCallbacks
+// shared by EntryImpls and MemEntryImpls.
 namespace disk_cache {
 
-// NetLog parameters for the creation of an Entry.  Contains the Entry's name
-// and whether it was created or opened.
-class EntryCreationParameters : public net::NetLog::EventParameters {
- public:
-  EntryCreationParameters(const std::string& key, bool created);
-  virtual base::Value* ToValue() const OVERRIDE;
+class Entry;
 
- protected:
-  virtual ~EntryCreationParameters();
+// Creates a NetLog callback that returns parameters for the creation of an
+// Entry.  Contains the Entry's key and whether it was created or opened.
+// |entry| can't be NULL, must support GetKey(), and must outlive the returned
+// callback.
+net::NetLog::ParametersCallback CreateNetLogEntryCreationCallback(
+    const Entry* entry,
+    bool created);
 
- private:
-  const std::string key_;
-  const bool created_;
+// Creates a NetLog callback that returns parameters for start of a non-sparse
+// read or write of an Entry.  For reads, |truncate| must be false.
+net::NetLog::ParametersCallback CreateNetLogReadWriteDataCallback(
+    int index,
+    int offset,
+    int buf_len,
+    bool truncate);
 
-  DISALLOW_COPY_AND_ASSIGN(EntryCreationParameters);
-};
+// Creates a NetLog callback that returns parameters for when a non-sparse
+// read or write completes.  For reads, |truncate| must be false.
+// |bytes_copied| is either the number of bytes copied or a network error
+// code.  |bytes_copied| must not be ERR_IO_PENDING, as it's not a valid
+// result for an operation.
+net::NetLog::ParametersCallback CreateNetLogReadWriteCompleteCallback(
+    int bytes_copied);
 
-// NetLog parameters for non-sparse reading and writing to an Entry.
-class ReadWriteDataParameters : public net::NetLog::EventParameters {
- public:
-  // For reads, |truncate| must be false.
-  ReadWriteDataParameters(int index, int offset, int buf_len, bool truncate);
-  virtual base::Value* ToValue() const OVERRIDE;
+// Creates a NetLog callback that returns parameters for when a sparse
+// operation is started.
+net::NetLog::ParametersCallback CreateNetLogSparseOperationCallback(
+    int64 offset,
+    int buff_len);
 
- protected:
-  virtual ~ReadWriteDataParameters();
+// Creates a NetLog callback that returns parameters for when a read or write
+// for a sparse entry's child is started.
+net::NetLog::ParametersCallback CreateNetLogSparseReadWriteCallback(
+    const net::NetLog::Source& source,
+    int child_len);
 
- private:
-  const int index_;
-  const int offset_;
-  const int buf_len_;
-  const bool truncate_;
-
-  DISALLOW_COPY_AND_ASSIGN(ReadWriteDataParameters);
-};
-
-// NetLog parameters for when a non-sparse read or write completes.
-class ReadWriteCompleteParameters : public net::NetLog::EventParameters {
- public:
-  // |bytes_copied| is either the number of bytes copied or a network error
-  // code.  |bytes_copied| must not be ERR_IO_PENDING, as it's not a valid
-  // result for an operation.
-  explicit ReadWriteCompleteParameters(int bytes_copied);
-  virtual base::Value* ToValue() const OVERRIDE;
-
- protected:
-  virtual ~ReadWriteCompleteParameters();
-
- private:
-  const int bytes_copied_;
-
-  DISALLOW_COPY_AND_ASSIGN(ReadWriteCompleteParameters);
-};
-
-// NetLog parameters for when a sparse operation is started.
-class SparseOperationParameters : public net::NetLog::EventParameters {
- public:
-  SparseOperationParameters(int64 offset, int buff_len);
-  virtual base::Value* ToValue() const OVERRIDE;
-
- protected:
-  virtual ~SparseOperationParameters();
-
- private:
-  const int64 offset_;
-  const int buff_len_;
-};
-
-// NetLog parameters for when a read or write for a sparse entry's child is
-// started.
-class SparseReadWriteParameters : public net::NetLog::EventParameters {
- public:
-  SparseReadWriteParameters(const net::NetLog::Source& source, int child_len);
-  virtual base::Value* ToValue() const OVERRIDE;
-
- protected:
-  virtual ~SparseReadWriteParameters();
-
- private:
-  const net::NetLog::Source source_;
-  const int child_len_;
-};
-
-// NetLog parameters for when a call to GetAvailableRange returns.
-class GetAvailableRangeResultParameters : public net::NetLog::EventParameters {
- public:
-  // |start| is ignored when |result| < 0.
-  GetAvailableRangeResultParameters(int64 start, int result);
-  virtual base::Value* ToValue() const OVERRIDE;
-
- protected:
-  virtual ~GetAvailableRangeResultParameters();
-
- private:
-  const int64 start_;
-  const int result_;
-};
+// Creates a NetLog callback that returns parameters for when a call to
+// GetAvailableRange returns.
+net::NetLog::ParametersCallback CreateNetLogGetAvailableRangeResultCallback(
+    int64 start,
+    int result);
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_NET_LOG_CACHE_PARAMETERS_H_