org.datadog.utils

Class CommonLogFormatUtils

java.lang.Object

org.datadog.utils.CommonLogFormatUtils

public class CommonLogFormatUtils
extends Object

Common Log Format handling utilities class.

Constructor Summary

Constructors

Constructor and Description
CommonLogFormatUtils()

Method Summary

Modifier and Type	Method and Description
static <K,V extends Comparable<? super V>> List<Map.Entry<K,V>>	findGreatestValues(Map<K,V> map, int limit) Returns List containing a subset of Map with the highest values.
static int	retrieveIntValue(String number, boolean canBeMissing) Retrieves an int value from a Common Log Format field.
static String	retrieveSection(String resource) Retrieves the web site section from a resource url.
static String	retrieveString(String value) Retrieves a String value from a Common Log Format field and nullify it if not present (represented by a hyphen "-").

Methods inherited from class java.lang.Object

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

Constructor Detail

CommonLogFormatUtils

public CommonLogFormatUtils()

Method Detail

retrieveIntValue

public static int retrieveIntValue(String number,
                                   boolean canBeMissing)
                            throws ParseException

Retrieves an int value from a Common Log Format field.

Parameters:

number - a String int representation

canBeMissing - indicates if the value can be missing and represented by a hyphen "-".

Returns:

0 if no value is provided (represented by a hyphen "-"), the int value otherwise.

Throws:

ParseException - if the number is not a valid int representation and is not a hyphen "-".

retrieveString

public static String retrieveString(String value)

Retrieves a String value from a Common Log Format field and nullify it if not present (represented by a hyphen "-").

Parameters:

value - a String representation of the value to retrieve.

Returns:

null if the value is a hyphen "-", the String value otherwise.

retrieveSection

public static String retrieveSection(String resource)
                              throws ParseException

Retrieves the web site section from a resource url. A section is defined as being what's before the second '/' in a URL. i.e. the section for "/pages/create' is "pages")

Parameters:

resource - the full resource url value.

Returns:

the section name.

Throws:

ParseException - if the section is not present or the url has a bad format.

findGreatestValues

public static <K,V extends Comparable<? super V>> List<Map.Entry<K,V>> findGreatestValues(Map<K,V> map,
                                                                                          int limit)

Returns List containing a subset of Map with the highest values.

Type Parameters:

K - The Map key type.

V - The Map value type.

Parameters:

map - The map to process.

limit - The number of highest values to be returned.

Returns:

A List containing the highest limit values.