将 Tomcat access log 记录到 MongoDB 的插件：Tomcat Mongo Access Log

Tomcat Mongo Access Log 是一个将 Tomcat access log 记录到 MongoDB 的插件。

使用方式和Tomcat自带的AccessLogValve基本一致，只需要简单配置就能够实现将日志存入到mongodb的功能。

例子（替换掉server.xml中原来的AccessLogValve配置）：

<!--  <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"         prefix="localhost_access_log." suffix=".txt"        pattern="%h %l %u %t &quot;%r&quot; %s %b" />  -->  <Valve       className="chanjarster.tomcat.valves.MongoAccessLogValve"       uri="mongodb://url/to/mongodb"      pattern="all" />

Attributes

MongoAccessLogValve supports the following configuration attributes of AccessLogValve :

1. condition
2. resolveHosts
3. conditionIf
4. excludes
5. pattern. A little different from AccessLogValve, see below
6. requestAttributesEnabled

And some attributes differs from AccessLogValve:

Collection Indexes

While it's hard to determine which fields should be indexed, but MongoAccessLogVavle provide the following indexes when it creates the Collection, so the query performance is not guaranteed. May be it's better to determine how to create index by yourself.

{ sessionId : 1}  { datetime : -1}  { user : 1}  { statusCode : 1}  { elapsedSeconds : 1}  { elapsedMilliseconds : 1}  { bytesSent : 1}  { url : 1}  { method : 1}    { url : 1, datetime : -1}    { user : 1, statusCode : 1}  { user : 1, datetime : -1}  { user : 1, sessionId : 1, statusCode : 1, datetime : -1}  { user : 1, sessionId : 1, url : 1, statusCode : 1, datetime : -1}    { sessionId : 1, datetime : -1}  { sessionId : 1, statusCode : 1}  { sessionId : 1, statusCode : 1, datetime : -1}  { sessionId : 1, url : 1, statusCode : 1, datetime : -1}

Patterns

All the pattern of AccessLogValve are supported while MongoAccessLogValve save them in a JSON form.

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