Package ca.uqac.lif.cep.apache

Class ParseCommonLog

java.lang.Object

ca.uqac.lif.cep.functions.Function

ca.uqac.lif.cep.functions.UnaryFunction<String,HttpRequest>

ca.uqac.lif.cep.apache.ParseCommonLog

All Implemented Interfaces:

ca.uqac.lif.cep.Duplicable, ca.uqac.lif.cep.functions.DuplicableFunction

public class ParseCommonLog
extends ca.uqac.lif.cep.functions.UnaryFunction<String,HttpRequest>

Parses a line of an Apache log in the common log format and creates an HttpRequest object with it.

Author:

Sylvain Hallé

Field Summary

Fields

Modifier and Type	Field	Description
static final ParseCommonLog	instance
protected final Calendar	m_calendar	An instance of calendar to convert dates into timestamps
protected static final Pattern	s_linePattern	The pattern to parse a line of the log
protected static final Pattern	s_urlPattern	The pattern to parse a URL

Fields inherited from class ca.uqac.lif.cep.functions.Function

s_maxInputArity

Method Summary

Modifier and Type	Method	Description
HttpRequest	getValue(String log_line)
static final String	methodToString(HttpRequest.Method m)	Creates a string out of a method
static Map<String,String>	parseParameters(String param_string)
static long	parseTime(Calendar calendar, String time_string)
static Map<String,String>	queryToMap(String query, HttpRequest.Method m)	Convenience method to transform a GET query into a map of attribute-value pairs.
static HttpRequest.Method	stringToMethod(String s)
static int	stringToMonth(String m)

Methods inherited from class ca.uqac.lif.cep.functions.UnaryFunction

duplicate, evaluate, getInputArity, getInputTypesFor, getOutputArity, getOutputTypeFor, reset

Methods inherited from class ca.uqac.lif.cep.functions.Function

duplicate, evaluate, evaluate, evaluateLazy, evaluatePartial, printState, readState

Methods inherited from class java.lang.Object

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

Field Details

instance

public static final ParseCommonLog instance

m_calendar

protected final Calendar m_calendar

An instance of calendar to convert dates into timestamps

s_linePattern

protected static final transient Pattern s_linePattern

The pattern to parse a line of the log

s_urlPattern

protected static final transient Pattern s_urlPattern

The pattern to parse a URL

Method Details

getValue

public HttpRequest getValue(String log_line)

Specified by:

getValue in class ca.uqac.lif.cep.functions.UnaryFunction<String,HttpRequest>

parseTime

public static long parseTime(Calendar calendar,
 String time_string)

stringToMonth

public static int stringToMonth(String m)

queryToMap

public static Map<String,String> queryToMap(String query,
 HttpRequest.Method m)

Convenience method to transform a GET query into a map of attribute-value pairs. For example, given an URI object representing the URL "http://abc.com/xyz?a=1&b=2", the method will return an object mapping "a" to "1" and "b" to "2".

Parameters:

query - The URI to process

m - The method (GET, POST, etc.) of the request

Returns:

A map of attribute-value pairs

methodToString

public static final String methodToString(HttpRequest.Method m)

Creates a string out of a method

Parameters:

m - The method

Returns:

The method in string

stringToMethod

public static HttpRequest.Method stringToMethod(String s)

parseParameters

public static Map<String,String> parseParameters(String param_string)