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authorSiri Hansen <[email protected]>2018-05-17 18:19:57 +0200
committerSiri Hansen <[email protected]>2018-05-23 11:10:55 +0200
commita9a6b803a60793d42a74e0f1693a7594dffb6bc3 (patch)
tree4e70433732de9c0dee413678a8ce1d61b22941a0 /lib/stdlib/doc
parent8aa64c90ddd20ec0ca8cc5fe92a6124324c51da5 (diff)
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Improve documentation of logger and error_logger
Diffstat (limited to 'lib/stdlib/doc')
-rw-r--r--lib/stdlib/doc/src/gen_event.xml3
-rw-r--r--lib/stdlib/doc/src/gen_server.xml6
-rw-r--r--lib/stdlib/doc/src/gen_statem.xml4
-rw-r--r--lib/stdlib/doc/src/proc_lib.xml50
4 files changed, 41 insertions, 22 deletions
diff --git a/lib/stdlib/doc/src/gen_event.xml b/lib/stdlib/doc/src/gen_event.xml
index 012737c390..51378a6b73 100644
--- a/lib/stdlib/doc/src/gen_event.xml
+++ b/lib/stdlib/doc/src/gen_event.xml
@@ -458,8 +458,7 @@ gen_event:stop -----> Module:terminate/2
with the expected reason. Any other reason than <c>normal</c>,
<c>shutdown</c>, or <c>{shutdown,Term}</c> causes an
error report to be issued using
- <seealso marker="kernel:error_logger#format/2">
- <c>error_logger:format/2</c></seealso>.
+ <seealso marker="kernel:logger"><c>logger(3)</c></seealso>.
The default <c>Reason</c> is <c>normal</c>.</p>
<p><c>Timeout</c> is an integer greater than zero that
specifies how many milliseconds to wait for the event manager to
diff --git a/lib/stdlib/doc/src/gen_server.xml b/lib/stdlib/doc/src/gen_server.xml
index da74e793e6..27edbc8de7 100644
--- a/lib/stdlib/doc/src/gen_server.xml
+++ b/lib/stdlib/doc/src/gen_server.xml
@@ -486,8 +486,7 @@ gen_server:abcast -----> Module:handle_cast/2
with the expected reason. Any other reason than <c>normal</c>,
<c>shutdown</c>, or <c>{shutdown,Term}</c> causes an
error report to be issued using
- <seealso marker="kernel:error_logger#format/2">
- <c>error_logger:format/2</c></seealso>.
+ <seealso marker="kernel:logger"><c>logger(3)</c></seealso>.
The default <c>Reason</c> is <c>normal</c>.</p>
<p><c>Timeout</c> is an integer greater than zero that
specifies how many milliseconds to wait for the server to
@@ -861,8 +860,7 @@ gen_server:abcast -----> Module:handle_cast/2
<c>shutdown</c>, or <c>{shutdown,Term}</c>, the <c>gen_server</c>
process is assumed to terminate because of an error and
an error report is issued using
- <seealso marker="kernel:error_logger#format/2">
- <c>error_logger:format/2</c></seealso>.</p>
+ <seealso marker="kernel:logger"><c>logger(3)</c></seealso>.</p>
</desc>
</func>
</funcs>
diff --git a/lib/stdlib/doc/src/gen_statem.xml b/lib/stdlib/doc/src/gen_statem.xml
index e918e83df7..a808d3af55 100644
--- a/lib/stdlib/doc/src/gen_statem.xml
+++ b/lib/stdlib/doc/src/gen_statem.xml
@@ -1778,7 +1778,7 @@ handle_event(_, _, State, Data) ->
with the expected reason. Any other reason than <c>normal</c>,
<c>shutdown</c>, or <c>{shutdown,Term}</c> causes an
error report to be issued through
- <seealso marker="kernel:error_logger#format/2"><c>error_logger:format/2</c></seealso>.
+ <seealso marker="kernel:logger"><c>logger(3)</c></seealso>.
The default <c><anno>Reason</anno></c> is <c>normal</c>.
</p>
<p>
@@ -2286,7 +2286,7 @@ init(Args) -> erlang:error(not_implemented, [Args]).</pre>
<c>shutdown</c>, or <c>{shutdown,Term}</c>,
the <c>gen_statem</c> is assumed to terminate because of an error
and an error report is issued using
- <seealso marker="kernel:error_logger#format/2"><c>error_logger:format/2</c></seealso>.
+ <seealso marker="kernel:logger"><c>logger(3)</c></seealso>.
</p>
</desc>
</func>
diff --git a/lib/stdlib/doc/src/proc_lib.xml b/lib/stdlib/doc/src/proc_lib.xml
index cb152d1935..c4fdf972e4 100644
--- a/lib/stdlib/doc/src/proc_lib.xml
+++ b/lib/stdlib/doc/src/proc_lib.xml
@@ -59,18 +59,16 @@
<p>When a process that is started using <c>proc_lib</c> terminates
abnormally (that is, with another exit reason than <c>normal</c>,
<c>shutdown</c>, or <c>{shutdown,Term}</c>), a <em>crash report</em>
- is generated, which is written to terminal by the default SASL
- event handler. That is, the crash report is normally only visible
- if the SASL application is started; see
- <seealso marker="sasl:sasl_app"><c>sasl(6)</c></seealso> and section
- <seealso marker="sasl:error_logging">SASL Error Logging</seealso>
- in the SASL User's Guide.</p>
+ is generated, which is written to terminal by the default logger
+ handler setup by Kernel. For more information about how crash reports
+ were logged before OTP-21, see <seealso marker="sasl:error_logging">
+ SASL Error Logging</seealso> in the SASL User's Guide.</p>
<p>Unlike in "plain Erlang", <c>proc_lib</c> processes will not generate
<em>error reports</em>, which are written to the terminal by the
- emulator and do not require SASL to be started. All exceptions are
+ emulator. All exceptions are
converted to <em>exits</em> which are ignored by the default
- <c>error_logger</c> handler.</p>
+ <c>logger</c> handler.</p>
<p>The crash report contains the previously stored information, such
as ancestors and initial function, the termination reason, and
@@ -115,12 +113,22 @@
<name name="format" arity="2"/>
<fsummary>Format a crash report.</fsummary>
<desc>
- <p>This function can be used by a user-defined event handler to
+ <note>
+ <p>This function is deprecated in the sense that
+ the <c>error_logger</c> is no longer the preferred
+ interface for logging in Erlang/OTP. A
+ new <seealso marker="kernel:logger_chapter">logging
+ API</seealso> was added in OTP-21, but
+ legacy <c>error_logger</c> handlers may still be used. New
+ logger handlers do not need to used this function, since
+ the formatting callback (<c>report_cb</c>) is included as
+ metadata in the log event.</p>
+ </note>
+ <p>This function can be used by a user-defined legacy
+ <c>error_logger</c> event handler to
format a crash report. The crash report is sent using
- <seealso marker="kernel:error_logger#error_report/2">
- <c>error_logger:error_report(crash_report,
- <anno>CrashReport</anno>)</c></seealso>.
- That is, the event to be handled is of the format
+ <seealso marker="kernel:logger">
+ <c>logger(3)</c></seealso>, and the event to be handled is of the format
<c>{error_report, GL, {Pid, crash_report,
<anno>CrashReport</anno>}}</c>,
where <c>GL</c> is the group leader pid of process
@@ -132,7 +140,19 @@
<name name="format" arity="3"/>
<fsummary>Format a crash report.</fsummary>
<desc>
- <p>This function can be used by a user-defined event handler to
+ <note>
+ <p>This function is deprecated in the sense that
+ the <c>error_logger</c> is no longer the preferred
+ interface for logging in Erlang/OTP. A
+ new <seealso marker="kernel:logger_chapter">logging
+ API</seealso> was added in OTP-21, but
+ legacy <c>error_logger</c> handlers may still be used. New
+ logger handlers do not need to used this function, since
+ the formatting callback (<c>report_cb</c>) is included as
+ metadata in the log event.</p>
+ </note>
+ <p>This function can be used by a user-defined legacy
+ <c>error_logger</c> event handler to
format a crash report. When <anno>Depth</anno> is specified as a
positive integer, it is used in the format string to
limit the output as follows: <c>io_lib:format("~P",
@@ -395,6 +415,8 @@ init(Parent) ->
<title>See Also</title>
<p><seealso marker="kernel:error_logger">
<c>error_logger(3)</c></seealso></p>
+ <p><seealso marker="kernel:logger">
+ <c>logger(3)</c></seealso></p>
</section>
</erlref>