ExtendedAccessLogValve (Apache Tomcat 8.5.12 API Documentation)

org.apache.catalina.valves

## Class ExtendedAccessLogValve

- java.lang.Object
- - org.apache.catalina.util.LifecycleBase
  - - org.apache.catalina.util.LifecycleMBeanBase
    - - org.apache.catalina.valves.ValveBase
      - - org.apache.catalina.valves.AbstractAccessLogValve
        - - org.apache.catalina.valves.AccessLogValve
          - - org.apache.catalina.valves.ExtendedAccessLogValve

- All Implemented Interfaces:
    MBeanRegistration, AccessLog, Contained, JmxEnabled, Lifecycle, Valve

      public class ExtendedAccessLogValve
      extends AccessLogValve

  An implementation of the W3c Extended Log File Format. See http://www.w3.org/TR/WD-logfile.html for more information about the format. The following fields are supported:
  - `c-dns`: Client hostname (or ip address if `enableLookups` for the connector is false)
  - `c-ip`: Client ip address
  - `bytes`: bytes served
  - `cs-method`: request method
  - `cs-uri`: The full uri requested
  - `cs-uri-query`: The query string
  - `cs-uri-stem`: The uri without query string
  - `date`: The date in yyyy-mm-dd format for GMT
  - `s-dns`: The server dns entry
  - `s-ip`: The server ip address
  - `cs(XXX)`: The value of header XXX from client to server
  - `sc(XXX)`: The value of header XXX from server to client
  - `sc-status`: The status code
  - `time`: Time the request was served
  - `time-taken`: Time (in seconds) taken to serve the request
  - `x-threadname`: Current request thread name (can compare later with stacktraces)
  - `x-A(XXX)`: Pull XXX attribute from the servlet context
  - `x-C(XXX)`: Pull the first cookie of the name XXX
  - `x-O(XXX)`: Pull the all response header values XXX
  - `x-R(XXX)`: Pull XXX attribute from the servlet request
  - `x-S(XXX)`: Pull XXX attribute from the session
  - `x-P(...)`: Call request.getParameter(...) and URLencode it. Helpful to capture certain POST parameters.
  - For any of the x-H(...) the following method will be called from the HttpServletRequest object
  - `x-H(authType)`: getAuthType
  - `x-H(characterEncoding)`: getCharacterEncoding
  - `x-H(contentLength)`: getContentLength
  - `x-H(locale)`: getLocale
  - `x-H(protocol)`: getProtocol
  - `x-H(remoteUser)`: getRemoteUser
  - `x-H(requestedSessionId)`: getRequestedSessionId
  - `x-H(requestedSessionIdFromCookie)`: isRequestedSessionIdFromCookie
  - `x-H(requestedSessionIdValid)`: isRequestedSessionIdValid
  - `x-H(scheme)`: getScheme
  - `x-H(secure)`: isSecure

  Log rotation can be on or off. This is dictated by the `rotatable` property.

  For UNIX users, another field called `checkExists` is also available. If set to true, the log file's existence will be checked before each logging. This way an external log rotator can move the file somewhere and Tomcat will start with a new file.

  For JMX junkies, a public method called `rotate` has been made available to allow you to tell this instance to move the existing log file to somewhere else and start writing a new log file.

  Conditional logging is also supported. This can be done with the `condition` property. If the value returned from ServletRequest.getAttribute(condition) yields a non-null value, the logging will be skipped.

  For extended attributes coming from a getAttribute() call, it is you responsibility to ensure there are no newline or control characters.

  Author:
    Peter Rossbach

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `protected static class` | `ExtendedAccessLogValve.CookieElement`
    `protected static class` | `ExtendedAccessLogValve.DateElement`
    `protected static class` | `ExtendedAccessLogValve.PatternTokenizer`
    `protected static class` | `ExtendedAccessLogValve.RequestAttributeElement`
    `protected static class` | `ExtendedAccessLogValve.RequestHeaderElement`
    `protected static class` | `ExtendedAccessLogValve.RequestParameterElement`
    `protected static class` | `ExtendedAccessLogValve.ResponseAllHeaderElement` write a specific response header - x-O(xxx)
    `protected static class` | `ExtendedAccessLogValve.ResponseHeaderElement`
    `protected static class` | `ExtendedAccessLogValve.ServletContextElement`
    `protected static class` | `ExtendedAccessLogValve.SessionAttributeElement`
    `protected static class` | `ExtendedAccessLogValve.TimeElement`

    - ### Nested classes/interfaces inherited from class org.apache.catalina.valves.AbstractAccessLogValve

      `AbstractAccessLogValve.AccessLogElement, AbstractAccessLogValve.ByteSentElement, AbstractAccessLogValve.DateAndTimeElement, AbstractAccessLogValve.DateFormatCache, AbstractAccessLogValve.ElapsedTimeElement, AbstractAccessLogValve.FirstByteTimeElement, AbstractAccessLogValve.HeaderElement, AbstractAccessLogValve.HostElement, AbstractAccessLogValve.HttpStatusCodeElement, AbstractAccessLogValve.LocalAddrElement, AbstractAccessLogValve.LocalServerNameElement, AbstractAccessLogValve.LogicalUserNameElement, AbstractAccessLogValve.MethodElement, AbstractAccessLogValve.PortElement, AbstractAccessLogValve.ProtocolElement, AbstractAccessLogValve.QueryElement, AbstractAccessLogValve.RemoteAddrElement, AbstractAccessLogValve.RequestElement, AbstractAccessLogValve.RequestURIElement, AbstractAccessLogValve.SessionIdElement, AbstractAccessLogValve.StringElement, AbstractAccessLogValve.ThreadNameElement, AbstractAccessLogValve.UserElement`

    - ### Nested classes/interfaces inherited from interface org.apache.catalina.Lifecycle

      `Lifecycle.SingleUse`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected static String` | `extendedAccessLogInfo` The descriptive information about this implementation.

    - ### Fields inherited from class org.apache.catalina.valves.AccessLogValve

      `currentLogFile, encoding, fileDateFormat, fileDateFormatter, prefix, renameOnRotate, rotatable, suffix, writer`

    - ### Fields inherited from class org.apache.catalina.valves.AbstractAccessLogValve

      `condition, conditionIf, enabled, locale, localeName, logElements, pattern, requestAttributesEnabled`

    - ### Fields inherited from class org.apache.catalina.valves.ValveBase

      `asyncSupported, container, containerLog, next, sm`

    - ### Fields inherited from class org.apache.catalina.util.LifecycleMBeanBase

      `mserver`

    - ### Fields inherited from interface org.apache.catalina.AccessLog

      `PROTOCOL_ATTRIBUTE, REMOTE_ADDR_ATTRIBUTE, REMOTE_HOST_ATTRIBUTE, SERVER_PORT_ATTRIBUTE`

    - ### Fields inherited from interface org.apache.catalina.Lifecycle

      `AFTER_DESTROY_EVENT, AFTER_INIT_EVENT, AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_DESTROY_EVENT, BEFORE_INIT_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, CONFIGURE_START_EVENT, CONFIGURE_STOP_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ExtendedAccessLogValve()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected AbstractAccessLogValve.AccessLogElement[]` | `createLogElements()` Parse pattern string and create the array of AccessLogElement.
    `protected AbstractAccessLogValve.AccessLogElement` | `getClientToServerElement(ExtendedAccessLogValve.PatternTokenizer tokenizer)`
    `protected AbstractAccessLogValve.AccessLogElement` | `getLogElement(String token, ExtendedAccessLogValve.PatternTokenizer tokenizer)`
    `protected AbstractAccessLogValve.AccessLogElement` | `getProxyElement(ExtendedAccessLogValve.PatternTokenizer tokenizer)`
    `protected AbstractAccessLogValve.AccessLogElement` | `getServerToClientElement(ExtendedAccessLogValve.PatternTokenizer tokenizer)`
    `protected AbstractAccessLogValve.AccessLogElement` | `getServletRequestElement(String parameter)`
    `protected AbstractAccessLogValve.AccessLogElement` | `getXParameterElement(ExtendedAccessLogValve.PatternTokenizer tokenizer)`
    `protected void` | `open()` Open the new log file for the date specified by `dateStamp`.

    - ### Methods inherited from class org.apache.catalina.valves.AccessLogValve

      `backgroundProcess, getDirectory, getEncoding, getFileDateFormat, getPrefix, getSuffix, isBuffered, isCheckExists, isRenameOnRotate, isRotatable, log, rotate, rotate, setBuffered, setCheckExists, setDirectory, setEncoding, setFileDateFormat, setPrefix, setRenameOnRotate, setRotatable, setSuffix, startInternal, stopInternal`

    - ### Methods inherited from class org.apache.catalina.valves.AbstractAccessLogValve

      `createAccessLogElement, createAccessLogElement, findLocale, getCondition, getConditionIf, getConditionUnless, getEnabled, getLocale, getPattern, getRequestAttributesEnabled, invoke, log, setCondition, setConditionIf, setConditionUnless, setEnabled, setLocale, setPattern, setRequestAttributesEnabled`

    - ### Methods inherited from class org.apache.catalina.valves.ValveBase

      `getContainer, getDomainInternal, getNext, getObjectNameKeyProperties, initInternal, isAsyncSupported, setAsyncSupported, setContainer, setNext, toString`

    - ### Methods inherited from class org.apache.catalina.util.LifecycleMBeanBase

      `destroyInternal, getDomain, getObjectName, postDeregister, postRegister, preDeregister, preRegister, register, setDomain, unregister`

    - ### Methods inherited from class org.apache.catalina.util.LifecycleBase

      `addLifecycleListener, destroy, findLifecycleListeners, fireLifecycleEvent, getState, getStateName, init, removeLifecycleListener, setState, setState, start, stop`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### extendedAccessLogInfo

          protected static final String extendedAccessLogInfo

      The descriptive information about this implementation.
      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### ExtendedAccessLogValve

          public ExtendedAccessLogValve()

  - ### Method Detail

    - #### open

          protected void open()

      Open the new log file for the date specified by `dateStamp`.
      Overrides:
        `open` in class `AccessLogValve`

    - #### createLogElements

          protected AbstractAccessLogValve.AccessLogElement[] createLogElements()

      Description copied from class: `AbstractAccessLogValve`
      Parse pattern string and create the array of AccessLogElement.
      Overrides:
        `createLogElements` in class `AbstractAccessLogValve`
      Returns:
        the log elements array

    - #### getLogElement

          protected AbstractAccessLogValve.AccessLogElement getLogElement(String token,
                                                              ExtendedAccessLogValve.PatternTokenizer tokenizer)
                                                                   throws IOException

      Throws:
        `IOException`

    - #### getClientToServerElement

          protected AbstractAccessLogValve.AccessLogElement getClientToServerElement(ExtendedAccessLogValve.PatternTokenizer tokenizer)
                                                                              throws IOException

      Throws:
        `IOException`

    - #### getServerToClientElement

          protected AbstractAccessLogValve.AccessLogElement getServerToClientElement(ExtendedAccessLogValve.PatternTokenizer tokenizer)
                                                                              throws IOException

      Throws:
        `IOException`

    - #### getProxyElement

          protected AbstractAccessLogValve.AccessLogElement getProxyElement(ExtendedAccessLogValve.PatternTokenizer tokenizer)
                                                                     throws IOException

      Throws:
        `IOException`

    - #### getXParameterElement

          protected AbstractAccessLogValve.AccessLogElement getXParameterElement(ExtendedAccessLogValve.PatternTokenizer tokenizer)
                                                                          throws IOException

      Throws:
        `IOException`

    - #### getServletRequestElement

          protected AbstractAccessLogValve.AccessLogElement getServletRequestElement(String parameter)

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