Monolog 可以當(dāng)應(yīng)用程序出現(xiàn)錯(cuò)誤的時(shí)候被配置來發(fā)送電子郵件。這個(gè)配置需要一些嵌入的 handlers 來避免接收太多的電子郵件。這個(gè)配置起初看起來會(huì)很復(fù)雜但是每一個(gè) handler 在出故障時(shí)都是很直接的。

YAML:

# app/config/config_prod.yml
monolog:
    handlers:
        mail:
            type:         fingers_crossed
            # 500 errors are logged at the critical level
            action_level: critical
            # to also log 400 level errors (but not 404's):
            # action_level: error
            # excluded_404s:
            #     - ^/
            handler:      buffered
        buffered:
            type:    buffer
            handler: swift
        swift:
            type:       swift_mailer
            from_email: error@example.com
            to_email:   error@example.com
            # or list of recipients
            # to_email:   [dev1@example.com, dev2@example.com, ...]
            subject:    An Error Occurred!
            level:      debug

XML:

<!-- app/config/config_prod.xml -->
<container xmlns="http://symfony.com/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:monolog="http://symfony.com/schema/dic/monolog"
    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd
                        http://symfony.com/schema/dic/monolog http://symfony.com/schema/dic/monolog/monolog-1.0.xsd">

    <monolog:config>
        <monolog:handler
            name="mail"
            type="fingers_crossed"
            action-level="critical"
            handler="buffered"
            <!--
            To also log 400 level errors (but not 404's):
            action-level="error"
            And add this child inside this monolog:handler
            <monolog:excluded-404>^/</monolog:excluded-404>
            -->
        />
        <monolog:handler
            name="buffered"
            type="buffer"
            handler="swift"
        />
        <monolog:handler
            name="swift"
            type="swift_mailer"
            from-email="error@example.com"
            subject="An Error Occurred!"
            level="debug">

            <monolog:to-email>error@example.com</monolog:to-email>

            <!-- or multiple to-email elements -->
            <!--
            <monolog:to-email>dev1@example.com</monolog:to-email>
            <monolog:to-email>dev2@example.com</monolog:to-email>
            ...
            -->
        </monolog:handler>
    </monolog:config>
</container>

PHP:

// app/config/config_prod.php
$container->loadFromExtension('monolog', array(
    'handlers' => array(
        'mail' => array(
            'type'         => 'fingers_crossed',
            'action_level' => 'critical',
            // to also log 400 level errors (but not 404's):
            // 'action_level' => 'error',
            // 'excluded_404s' => array(
            //     '^/',
            // ),
            'handler'      => 'buffered',
        ),
        'buffered' => array(
            'type'    => 'buffer',
            'handler' => 'swift',
        ),
        'swift' => array(
            'type'       => 'swift_mailer',
            'from_email' => 'error@example.com',
            'to_email'   => 'error@example.com',
            // or a list of recipients
            // 'to_email'   => array('dev1@example.com', 'dev2@example.com', ...),
            'subject'    => 'An Error Occurred!',
            'level'      => 'debug',
        ),
    ),
));

郵件 handler 是一個(gè) fingers_crossed 的 handler，這就意味著這只有在行為層才會(huì)被觸發(fā)，在這個(gè)例子中到達(dá)了臨界。臨界層只會(huì)觸發(fā) 5xx HTTP 代碼錯(cuò)誤。如果一旦到達(dá)這一層 fingers_crossed 的 handler 將會(huì)記錄所有的消息且不管它們是哪一層。handler 設(shè)置意味著輸出之后傳遞到緩沖 handler。

如果你想要 400 和 500 層次錯(cuò)誤觸發(fā)電子郵件，將 action_level 設(shè)置成 critical 而不是 error?？梢詤⒄丈厦胬拥拇a。

緩沖 handler 簡(jiǎn)單地保留著請(qǐng)求的所有信息然后一口氣將他們傳遞到嵌入的 handler 中。如果不使用這個(gè) handler 那么每條消息將會(huì)分別發(fā)送電子郵件。這就是后來傳遞到 swift handler 的。這是專門處理向你發(fā)送錯(cuò)誤電子郵件的 handler。這個(gè)的設(shè)置很直接，對(duì)于來去的地址和主題來說。

你可以將這些 handler 與其他的合并這樣錯(cuò)誤就會(huì)在發(fā)出郵件的同時(shí)記錄在服務(wù)器中：

YAML:

# app/config/config_prod.yml
monolog:
    handlers:
        main:
            type:         fingers_crossed
            action_level: critical
            handler:      grouped
        grouped:
            type:    group
            members: [streamed, buffered]
        streamed:
            type:  stream
            path:  "%kernel.logs_dir%/%kernel.environment%.log"
            level: debug
        buffered:
            type:    buffer
            handler: swift
        swift:
            type:       swift_mailer
            from_email: error@example.com
            to_email:   error@example.com
            subject:    An Error Occurred!
            level:      debug

XML:

<!-- app/config/config_prod.xml -->
<container xmlns="http://symfony.com/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:monolog="http://symfony.com/schema/dic/monolog"
    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd
                        http://symfony.com/schema/dic/monolog http://symfony.com/schema/dic/monolog/monolog-1.0.xsd">

    <monolog:config>
        <monolog:handler
            name="main"
            type="fingers_crossed"
            action_level="critical"
            handler="grouped"
        />
        <monolog:handler
            name="grouped"
            type="group"
        >
            <member type="stream"/>
            <member type="buffered"/>
        </monolog:handler>
        <monolog:handler
            name="stream"
            path="%kernel.logs_dir%/%kernel.environment%.log"
            level="debug"
        />
        <monolog:handler
            name="buffered"
            type="buffer"
            handler="swift"
        />
        <monolog:handler
            name="swift"
            from-email="error@example.com"
            to-email="error@example.com"
            subject="An Error Occurred!"
            level="debug"
        />
    </monolog:config>
</container>

PHP:

// app/config/config_prod.php
$container->loadFromExtension('monolog', array(
    'handlers' => array(
        'main' => array(
            'type'         => 'fingers_crossed',
            'action_level' => 'critical',
            'handler'      => 'grouped',
        ),
        'grouped' => array(
            'type'    => 'group',
            'members' => array('streamed', 'buffered'),
        ),
        'streamed'  => array(
            'type'  => 'stream',
            'path'  => '%kernel.logs_dir%/%kernel.environment%.log',
            'level' => 'debug',
        ),
        'buffered'    => array(
            'type'    => 'buffer',
            'handler' => 'swift',
        ),
        'swift' => array(
            'type'       => 'swift_mailer',
            'from_email' => 'error@example.com',
            'to_email'   => 'error@example.com',
            'subject'    => 'An Error Occurred!',
            'level'      => 'debug',
        ),
    ),
));

這個(gè)使用了 group handler 來向兩個(gè)組員發(fā)送消息，buffered 和 stream handlers?，F(xiàn)在這些消息既被記錄在日志中又被電子郵件發(fā)送出去了。

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