JsonAccessLogValve (Apache Tomcat 9.0.111 API Documentation)
Description: declaration: package: org.apache.catalina.valves, class: JsonAccessLogValve

# Class JsonAccessLogValve

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.JsonAccessLogValve

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

public class JsonAccessLogValve extends AccessLogValve
Access log valve derivative that rewrites entries as JSON.

Important note: the attribute names are not final.

Patterns are mapped to attributes as followed:

- a: remoteAddr
- A: localAddr
- b: size (byteSent: size)
- B: byteSentNC
- D: elapsedTime
- F: firstByteTime
- h: host
- H: protocol
- l: logicalUserName
- m: method
- p: port
- q: query
- r: request
- s: statusCode
- S: sessionId
- t: time (dateTime: time)
- T: elapsedTimeS
- u: user
- U: path (requestURI: path)
- v: localServerName
- I: threadName
- X: connectionStatus
- %{xxx}a: remoteAddress-xxx
- %{xxx}p: port-xxx
- %{xxx}t: time-xxx
- %{xxx}c: cookies
- %{xxx}i: requestHeaders
- %{xxx}o: responseHeaders
- %{xxx}r: requestAttributes
- %{xxx}s: sessionAttributes

The attribute list is based on parser_apache2.rb

- ## Nested Class Summary

  Nested Classes
  Modifier and Type
  Class
  Description
  `protected static class`
  `JsonAccessLogValve.CharElement`
  write any char

  ### Nested classes/interfaces inherited from class AbstractAccessLogValve

  `AbstractAccessLogValve.AccessLogElement, AbstractAccessLogValve.ByteSentElement, AbstractAccessLogValve.CachedElement, AbstractAccessLogValve.ConnectionStatusElement, AbstractAccessLogValve.CookieElement, 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.RequestAttributeElement, AbstractAccessLogValve.RequestElement, AbstractAccessLogValve.RequestURIElement, AbstractAccessLogValve.ResponseHeaderElement, AbstractAccessLogValve.SessionAttributeElement, AbstractAccessLogValve.SessionIdElement, AbstractAccessLogValve.StringElement, AbstractAccessLogValve.ThreadNameElement, AbstractAccessLogValve.UserElement`

  ### Nested classes/interfaces inherited from interface Lifecycle

  `Lifecycle.SingleUse`

- ## Field Summary

  ### Fields inherited from class AccessLogValve

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

  ### Fields inherited from class AbstractAccessLogValve

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

  ### Fields inherited from class ValveBase

  `asyncSupported, container, containerLog, next, sm`

  ### Fields inherited from class LifecycleMBeanBase

  `mserver`

  ### Fields inherited from interface AccessLog

  `PROTOCOL_ATTRIBUTE, REMOTE_ADDR_ATTRIBUTE, REMOTE_HOST_ATTRIBUTE, SERVER_NAME_ATTRIBUTE, SERVER_PORT_ATTRIBUTE`

  ### Fields inherited from interface 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
  Description
  `JsonAccessLogValve()`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `protected AbstractAccessLogValve.AccessLogElement`
  `createAccessLogElement(char pattern)`
  Create an AccessLogElement implementation.
  `protected AbstractAccessLogValve.AccessLogElement`
  `createAccessLogElement(String name, char pattern)`
  Create an AccessLogElement implementation which needs an element name.
  `protected AbstractAccessLogValve.AccessLogElement[]`
  `createLogElements()`
  Parse pattern string and create the array of AccessLogElement.

  ### Methods inherited from class AccessLogValve

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

  ### Methods inherited from class AbstractAccessLogValve

  `escapeAndAppend, escapeAndAppend, findLocale, getCondition, getConditionIf, getConditionUnless, getEnabled, getIpv6Canonical, getLocale, getMaxLogMessageBufferSize, getPattern, getRequestAttributesEnabled, invoke, log, setCondition, setConditionIf, setConditionUnless, setEnabled, setIpv6Canonical, setLocale, setMaxLogMessageBufferSize, setPattern, setRequestAttributesEnabled`

  ### Methods inherited from class ValveBase

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

  ### Methods inherited from class LifecycleMBeanBase

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

  ### Methods inherited from class LifecycleBase

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

  ### Methods inherited from class Object

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

- ## Constructor Details

  - ### JsonAccessLogValve

    public JsonAccessLogValve()

- ## Method Details

  - ### 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

  - ### createAccessLogElement

    protected AbstractAccessLogValve.AccessLogElement createAccessLogElement(String name, char pattern)
    Description copied from class: `AbstractAccessLogValve`
    Create an AccessLogElement implementation which needs an element name.
    Overrides:
      `createAccessLogElement` in class `AbstractAccessLogValve`
    Parameters:
      `name` - Header name
      `pattern` - char in the log pattern
    Returns:
      the log element

  - ### createAccessLogElement

    protected AbstractAccessLogValve.AccessLogElement createAccessLogElement(char pattern)
    Description copied from class: `AbstractAccessLogValve`
    Create an AccessLogElement implementation.
    Overrides:
      `createAccessLogElement` in class `AbstractAccessLogValve`
    Parameters:
      `pattern` - char in the log pattern
    Returns:
      the log element