1### 2.0.0
2
3- `Monolog\Logger::API` can be used to distinguish between a Monolog `1` and `2`
4  install of Monolog when writing integration code.
5
6- Removed non-PSR-3 methods to add records, all the `add*` (e.g. `addWarning`)
7  methods as well as `emerg`, `crit`, `err` and `warn`.
8
9- DateTime are now formatted with a timezone and microseconds (unless disabled).
10  Various formatters and log output might be affected, which may mess with log parsing
11  in some cases.
12
13- The `datetime` in every record array is now a DateTimeImmutable, not that you
14  should have been modifying these anyway.
15
16- The timezone is now set per Logger instance and not statically, either
17  via ->setTimezone or passed in the constructor. Calls to Logger::setTimezone
18  should be converted.
19
20- `HandlerInterface` has been split off and two new interfaces now exist for
21  more granular controls: `ProcessableHandlerInterface` and
22  `FormattableHandlerInterface`. Handlers not extending `AbstractHandler`
23  should make sure to implement the relevant interfaces.
24
25- `HandlerInterface` now requires the `close` method to be implemented. This
26  only impacts you if you implement the interface yourself, but you can extend
27  the new `Monolog\Handler\Handler` base class too.
28
29- There is no more default handler configured on empty Logger instances, if
30  you were relying on that you will not get any output anymore, make sure to
31  configure the handler you need.
32
33#### LogglyFormatter
34
35- The records' `datetime` is not sent anymore. Only `timestamp` is sent to Loggly.
36
37#### AmqpHandler
38
39- Log levels are not shortened to 4 characters anymore. e.g. a warning record
40  will be sent using the `warning.channel` routing key instead of `warn.channel`
41  as in 1.x.
42- The exchange name does not default to 'log' anymore, and it is completely ignored
43  now for the AMQP extension users. Only PHPAmqpLib uses it if provided.
44
45#### RotatingFileHandler
46
47- The file name format must now contain `{date}` and the date format must be set
48  to one of the predefined FILE_PER_* constants to avoid issues with file rotation.
49  See `setFilenameFormat`.
50
51#### LogstashFormatter
52
53- Removed Logstash V0 support
54- Context/extra prefix has been removed in favor of letting users configure the exact key being sent
55- Context/extra data are now sent as an object instead of single keys
56
57#### HipChatHandler
58
59- Removed deprecated HipChat handler, migrate to Slack and use SlackWebhookHandler or SlackHandler instead
60
61#### SlackbotHandler
62
63- Removed deprecated SlackbotHandler handler, use SlackWebhookHandler or SlackHandler instead
64
65#### RavenHandler
66
67- Removed deprecated RavenHandler handler, use sentry/sentry 2.x and their Sentry\Monolog\Handler instead
68
69#### ElasticSearchHandler
70
71- As support for the official Elasticsearch library was added, the former ElasticSearchHandler has been
72  renamed to ElasticaHandler and the new one added as ElasticsearchHandler.
73