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This function is called when a logger API function for fetching
handler configuration is called. The point is to allow the handler to
remove internal data fields that it might have stored in the
configuration database, before returning the handler configuration to
the caller.
An example of such internal data are the 'handler_pid' and 'mode_tab'
fields that logger_std_h and logger_disk_log_h store in their
configuration maps.
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The new parameter to this function, SetOrUpdate, indicates how
unspecified configuration data fields shall be set. The rule is that
if SetOrUpdate equals set, then default values shall be used, and if
SetOrUpdate equals update, then existing configuration values shall be
used. Consequently, these examples now apply to logger_std_h and
logger_disk_log_h:
set_handler_config(default, config, #{sync_mode_qlen => 20}) sets the
value of sync_mode_qlen to 20, and resets all other (writable) fields
in the config map to their default values.
update_handler_config(default, config, #{sync_mode_qlen => 20}) sets
the value of sync_mode_qlen to 20, and leaves all other fields in the
config map unchanged.
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The encoding option was introduced in commit
270d909696a753af022df72a404c73f2895b4a02, to allow report callbacks to
format according to a given encoding. There was, however, no
connection between this encoding option, and the encoding of the
device to which the logger handler was writing.
Since a formatter is defined to return unicode:chardata(), and in
order to avoid mismatch with the encoding of the device, the encoding
option is now removed from the formatter. The handler itself must make
sure that it does not write illegal data to its device.
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* siri/logger-fix:
[logger] Update documentation
[logger] Adjust priority settings in test
[logger] Unregister handler names before terminating
[logger] Stress overload_kill tests in disk_log handler
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Now only setting high priority on every second burst sending process,
to allow for handler process to be scheduled in every now and then.
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Conflicts:
lib/kernel/src/logger_disk_log_h.erl
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Log events issued via error_logger:info_msg or
error_logger:info_report are now forwarded to Logger with level
'notice' instead of 'info'.
Log events issued by gen_* behaviours are also changed from level
'info' to level 'notice'.
Progress reports are still 'info', and can therefore easily be
included/excluded by changing the primary log level. By default, they
are not logged.
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Conflicts:
lib/kernel/src/logger_disk_log_h.erl
lib/kernel/src/logger_std_h.erl
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Module and Id are now always included as fields in Config, so these
are no longer returned as separate elements.
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And add field 'module' in handler config.
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Added:
* logger:get_config() - replaces i(), returns all Logger
configuration, i.e. primary and handler config, and module levels
* logger:get_handler_ids() -> [HandlerId]
* logger:get_handler_config() -> [{HandlerId,Module,Config}]
Removed:
* logger:i/1, will probably be replaced in a later release.
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logger_std_h:filesync/1 -----> logger_std_h:sync/1
logger_disk_log_h:disk_log_sync/1 -----> logger_disk_log_h:sync/1
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This field contains the index of all installed handlers. It is
internal and can not be altered by the user, and should therefore not
be visible.
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Most logger configuration that was possible through
kernel application variables have been moved into a
common 'logger' application environment in kernel.
Now all the configuration possible through the logger
API can be done as sys config.
The handler started by kernel has been renamed to 'default'
instead of logger_std_h.
There is a new logger:setup_handlers/1 function that given an
application name can be used to setup handlers in other applications.
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* peppe/peppe/kernel/logger_handler_fixes:
Various logger handler improvements and updated test cases
Make it possible to disable sync and drop mode
Conflicts:
lib/kernel/test/logger_disk_log_h_SUITE.erl
lib/kernel/test/logger_std_h_SUITE.erl
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Also add tests and update failing test cases
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