incubator-sling-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Georg Henzler (Confluence)" <conflue...@apache.org>
Subject [CONF] Apache Sling > Health Checks Executor Design
Date Tue, 31 Dec 2013 11:27:00 GMT
<html>
    <head>
        <meta name="viewport" content="width=device-width" />
        <base href="https://cwiki.apache.org/confluence" />
        <style type="text/css">
    body, #email-content, #email-content-inner { font-family: Arial,FreeSans,Helvetica,sans-serif;
}
    body, p, blockquote, pre, code, td, th, li, dt, dd { font-size: 13px; }
    small { font-size: 11px; }

    body { width:100% !important; -webkit-font-smoothing: antialiased; }

    body,
    #email-wrapper { background-color: #f0f0f0; }
    #email-wrapper-inner { padding: 20px; text-align: center; }
    #email-content-inner { background-color: #fff; border: 1px solid #bbb; color: $menuTxtColour;
padding:20px; text-align:left; }
    #email-wrapper-inner > table { width: 100%; }
    #email-wrapper-inner.thin > table { margin: 0 auto; width: 50%; }
    #email-footer { padding: 0 16px 32px 16px; margin: 0; }

    .email-indent { margin: 8px 0 16px 0; }
    .email-comment { margin: 0 0 0 56px; }
    .email-comment.removed { background-color: #ffe7e7; border: 1px solid #df9898; padding:
0 8px;}

    #email-title-avatar { text-align: left; vertical-align: top; width: 48px; padding-right:
8px; }
    #email-title-flavor { margin: 0; padding: 0 0 4px 0; }
    #email-title-heading { font-size: 16px; line-height: 20px; min-height: 20px; margin: 0;
padding: 0; }
    #email-title .icon { border: 0; padding: 0 5px 0 0; text-align: left; vertical-align:
middle; }

    #email-actions { border-top: 1px solid #bbb; color: #505050; margin: 8px 0 0 0; padding:
0; }
    #email-actions td { padding-top: 8px; }
    #email-actions .left { max-width: 45%; text-align: left; }
    #email-actions .right { text-align: right; }
    .email-reply-divider { border-top: 1px solid #bbb; color: #505050; margin: 32px 0 8px
0; padding: 8px 0; }
    .email-section-title { border-bottom: 1px solid #bbb; margin: 8px 0; padding: 8px 0 0
0; }

    .email-metadata { color: #505050; }

    a { color: #326ca6; text-decoration: none; }
    a:hover { color: #336ca6; text-decoration: underline; }
    a:active {color: #326ca6; }

    a.email-footer-link { color: #505050; font-size: 11px; }

    .email-item-list { list-style: none; margin: 4px 0; padding-left: 0; }
    .email-item-list li { list-style: none; margin: 0; padding: 4px 0; }
    .email-list-divider { color: #505050; padding: 0 0.35em; }
    .email-operation-icon { padding-right: 5px; }

    .avatar { -ms-interpolation-mode: bicubic; border-radius: 3px;}
    .avatar-link { margin: 2px; }

    .tableview th { border-bottom: 1px solid #69C; font-weight: bold; text-align: left; }
    .tableview td { border-bottom: 1px solid #bbbbbb; text-align: left; padding: 4px 16px
4px 0; }

    .aui-message {  margin: 1em 0; padding: 8px; }
    .aui-message.info { background-color: #e0f0ff; border: 1px solid #9eb6d4; }
    .aui-message.success { background-color: #ddfade; border: 1px solid #93c49f; }
    .aui-message.error,
    .aui-message.removed { background-color: #ffe7e7; border: 1px solid #df9898; color: #000;
}

    .call-to-action-table { margin: 10px 1px 1px 1px;}
    .call-to-cancel-container, .call-to-action-container { padding: 5px 20px; }
    .call-to-cancel-container { border: 1px solid #aaa; background-color: #eee; border-radius:
3px; }
    .call-to-cancel-container a.call-to-cancel-button { background-color: #eee; font-size:
14px; line-height: 1; padding: 0; margin: 0; color: #666; font-family: sans-serif;}
    .call-to-action-container { border: 1px solid #486582;  background-color: #3068A2; border-radius:
3px; padding: 4px 10px; }
    .call-to-action-container a.call-to-action-button { background-color: #3068A2; font-size:
14px; line-height: 1; padding: 0; margin: 0; color: #fff; font-weight: bold; font-family:
sans-serif; }

    /** The span around the inline task checkbox image */
    .diff-inline-task-overlay {
        display: inline-block;
        text-align: center;
        height: 1.5em;
        padding: 5px 0px 1px 5px;
        margin-right: 5px;
        /** Unfortunately, the negative margin-left is stripped out in gmail */
        margin-left: -5px;
    }

            @media handheld, only screen and (max-device-width: 480px) {
        div, a, p, td, th, li, dt, dd { -webkit-text-size-adjust: auto; }
        small, small a { -webkit-text-size-adjust: 90%; }

        td[id=email-wrapper-inner] { padding: 2px !important; }
        td[id=email-content-inner] { padding: 8px !important; }
        td[id="email-wrapper-inner"][class="thin"] > table { text-align: left !important;
width: 100% !important; }
        td[id=email-footer] { padding: 8px 12px !important; }
        div[class=email-indent] { margin: 8px 0px !important; }
        div[class=email-comment] { margin: 0 !important; }

        p[id=email-title-flavor] a { display: block; } /* puts the username and the action
on separate lines */
        p[id=email-permalink] { padding: 4px 0 0 0 !important; }

        table[id=email-actions] td { padding-top: 0 !important; }
        table[id=email-actions] td.right { text-align: right !important; }
        table[id=email-actions] .email-list-item { display: block; margin: 1em 0 !important;
word-wrap: normal !important; }
        span[class=email-list-divider] { display: none; }
    }



        </style>
    </head>
    <body style="font-family: Arial, FreeSans, Helvetica, sans-serif; font-size: 13px;
width: 100%; -webkit-font-smoothing: antialiased; background-color: #f0f0f0">
        <table id="email-wrapper" width="100%" cellspacing="0" cellpadding="0" border="0"
style="background-color: #f0f0f0">
            <tbody>
                <tr valign="middle">
                    <td id="email-wrapper-inner" style="font-size: 13px; padding: 20px;
text-align: center">
                        <table id="email-content" cellspacing="0" cellpadding="0" border="0"
style="font-family: Arial, FreeSans, Helvetica, sans-serif; width: 100%">
                            <tbody>
                                <tr valign="top">
                                    <td id="email-content-inner" align="left" style="font-family:
Arial, FreeSans, Helvetica, sans-serif; font-size: 13px; background-color: #fff; border: 1px
solid #bbb; padding: 20px; text-align: left">
                                        <table id="email-title" cellpadding="0" cellspacing="0"
border="0" width="100%">
                                            <tbody>
                                                <tr>
                                                    <td id="email-title-avatar" rowspan="2"
style="font-size: 13px; text-align: left; vertical-align: top; width: 48px; padding-right:
8px"> <img class="avatar" src="cid:avatar_6575fcdaee81ead772cbfa6953e18fb6" border="0"
height="48" width="48" style="-ms-interpolation-mode: bicubic; border-radius: 3px" /> </td>
                                                    <td valign="top" style="font-size:
13px">
                                                        <div id="email-title-flavor" class="email-metadata"
style="margin: 0; padding: 0 0 4px 0; color: #505050">
                                                            <a href="    https://cwiki.apache.org/confluence/display/~henzlerg
" style="color:#326ca6;text-decoration:none;; color: #326ca6; text-decoration: none">Georg
Henzler</a> edited the page:
                                                        </div> </td>
                                                </tr>
                                                <tr>
                                                    <td valign="top" style="font-size:
13px"> <h2 id="email-title-heading" style="font-size: 16px; line-height: 20px; min-height:
20px; margin: 0; padding: 0"> <a href="https://cwiki.apache.org/confluence/display/SLING/Health+Checks+Executor+Design"
style="color: #326ca6; text-decoration: none"> <img class="icon" src="cid:page-icon"
alt="" style="border: 0; padding: 0 5px 0 0; text-align: left; vertical-align: middle" />
<strong style="font-size:16px;line-height:20px;vertical-align:top;">Health Checks Executor
Design</strong> </a> </h2> </td>
                                                </tr>
                                            </tbody>
                                        </table>
                                        <div class="email-indent" style="margin: 8px 0
16px 0">
                                            <div class="email-diff">
                                                <div id="page-diffs" class="wiki-content">
                                                    <p class="diff-context-placeholder"
style="font-size: 13px">...</p>
                                                    <p class="diff-block-target diff-block-context"
style="font-size: 13px">An HTTP front-end uses a set of HCs, selected by tags, to decide
whether to include a Sling instance in the pool used to process incoming requests. Every few
seconds, the front-end pings a specific servlet on the Sling instance, which provides the
aggregated HC results in a format specified by the front-end.
                                                        <s>
                                                            <span class="diff-html-changed"
id="changed-diff-0" style="background-color: #d6f0ff;">Cached results are not acceptable
in this case,</span>
                                                        </s><span class="diff-html-changed"
style="background-color: #d6f0ff;"> </span>the servlet must either reply quickly
with an OK status, or fail after a timeout specified by the front-end. HCs are executed in
parallel as in use case B.</p>
                                                    <table class="diff-macro diff-html-added
diff-block-target diff-block-context" style="background-color: #f0f0f0;border: 1px solid #dddddd;margin:
10px 1px;padding: 0 2px 2px;width: 100%;background-color: #ddfade;border-color: #93c49f;">
                                                        <thead>
                                                            <tr>
                                                                <th class="diff-macro-title"
style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;;
font-size: 13px"><span class="diff-html-added" id="added-diff-0" style="font-size: 100%;
background-color: #ddfade;"><span class="icon macro-placeholder-icon" style="background-color:
;line-height: 20px;"><img src="https://cwiki.apache.org/confluence/s/en_GB-1988229788/4109/76e0dbb30bc8580e459c201f3535d84f9283a9ac.1/_/images/icons/macrobrowser/dropdown/note.png"
style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Note</span></th>
                                                            </tr>
                                                        </thead>
                                                        <tbody>
                                                            <tr>
                                                                <td class="diff-macro-body"
style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; font-size: 13px">
<p style="font-size: 13px"> <span><span class="diff-html-added" style="font-size:
100%; background-color: #ddfade;">Georg: Cached results are totally fine for short TTLs
(2 sec is the default, the actual driver for having the cache is JMX and the JMX module would
even be fine with 500ms TTL as the whole point is to not execute checks several times for
each JMX attribute exposed). </span></span> </p> </td>
                                                            </tr>
                                                        </tbody>
                                                    </table>
                                                    <p class="diff-block-target diff-block-context"
style="font-size: 13px"> <span class="diff-html-added" style="font-size: 100%; background-color:
#ddfade;">&nbsp;</span> </p>
                                                    <p class="diff-block-context" style="font-size:
13px"> <span style="font-size: 24.0px;line-height: 1.25;">Suggested API changes</span>
</p>
                                                    <h2 id="HealthChecksExecutorDesign-APIvariantA"
class="diff-block-context">API variant A</h2>
                                                    <p class="diff-context-placeholder"
style="font-size: 13px">...</p>
                                                </div>
                                            </div>
                                        </div>
                                        <table id="email-actions" class="email-metadata"
cellspacing="0" cellpadding="0" border="0" width="100%" style="border-top: 1px solid #bbb;
color: #505050; margin: 8px 0 0 0; padding: 0; color: #505050">
                                            <tbody>
                                                <tr>
                                                    <td class="left" valign="top" style="font-size:
13px; padding-top: 8px; max-width: 45%; text-align: left"> <span class="email-list-item"><a
href="https://cwiki.apache.org/confluence/display/SLING/Health+Checks+Executor+Design" style="color:
#326ca6; text-decoration: none">View Online</a> </span> <span class="email-list-divider"
style="color: #505050; padding: 0 0.350em">&middot;</span> <span class="email-list-item"><a
href="https://cwiki.apache.org/confluence/plugins/likes/like.action?contentId=38569054" style="color:
#326ca6; text-decoration: none">Like</a> </span> <span class="email-list-divider"
style="color: #505050; padding: 0 0.350em">&middot;</span> <span class="email-list-item"><a
href="https://cwiki.apache.org/confluence/pages/diffpagesbyversion.action?pageId=38569054&amp;revisedVersion=7&amp;originalVersion=6"
style="color: #326ca6; text-decoration: none">View Changes</a> </span> <span
class="email-list-divider" style="color: #505050; padding: 0 0.350em">&middot;</span>
<span class="email-list-item"><a href="https://cwiki.apache.org/confluence/display/SLING/Health+Checks+Executor+Design?showComments=true&amp;showCommentArea=true#addcomment"
style="color: #326ca6; text-decoration: none">Add Comment</a> </span> </td>
                                                    <td class="right" width="50%" valign="top"
style="font-size: 13px; padding-top: 8px; text-align: right"> <span class="email-list-item"><a
href="https://cwiki.apache.org/confluence/users/removespacenotification.action?spaceKey=SLING"
style="color: #326ca6; text-decoration: none">Stop watching space</a> </span>
<span class="email-list-divider" style="color: #505050; padding: 0 0.350em">&middot;</span>
<span class="email-list-item"><a href="https://cwiki.apache.org/confluence/users/editmyemailsettings.action"
style="color: #326ca6; text-decoration: none">Manage Notifications</a> </span>
</td>
                                                </tr>
                                            </tbody>
                                        </table> </td>
                                </tr>
                            </tbody>
                        </table> </td>
                </tr>
                <tr>
                    <td id="email-footer" align="center" style="font-size: 13px; padding:
0 16px 32px 16px; margin: 0"> <small style="font-size: 11px"> This message was sent
by <a class="email-footer-link" style="color:#505050;font-size:11px;text-decoration:none;;
color: #326ca6; text-decoration: none; color: #505050; font-size: 11px" href="http://www.atlassian.com/software/confluence">Atlassian
Confluence</a> 5.0.3, <a class="email-footer-link" style="color:#505050;font-size:11px;text-decoration:none;;
color: #326ca6; text-decoration: none; color: #505050; font-size: 11px" href="http://www.atlassian.com/software/confluence/overview/team-collaboration-software?utm_source=email-footer">Team
Collaboration Software</a> </small> </td>
                </tr>
            </tbody>
        </table>
    </body>
</html>
Mime
View raw message