com.kdgregory.logging.aws.common

Class Substitutions

java.lang.Object

com.kdgregory.logging.aws.common.Substitutions

public class Substitutions
extends Object

Performs substitutions. Users create a new instance for every group of strings that needs substitutions applied (otherwise the timestamp would become stale). See docs for a complete explanation of how substitions work.

All values are lazily retrieved. This includes an InfoFacade, used for any substitutions that require knowledge of the AWS environment.

Instances are thread-safe, but not thread-optimized (concurrent lazy retrieves of the same value are possible).

Constructor Summary

Constructors

Constructor and Description
Substitutions(Date now, int sequence) Standard constructor, which retrieves an InfoFacade if and when it is needed.
Substitutions(Date now, int sequence, InfoFacade infoFacade) Base constructor, which allows configuration of the InfoFacade instance.

Method Summary

Modifier and Type	Method and Description
String	perform(String input) Applies all substitutions.

Methods inherited from class java.lang.Object

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

Constructor Detail

Substitutions

public Substitutions(Date now,
                     int sequence,
                     InfoFacade infoFacade)

Base constructor, which allows configuration of the InfoFacade instance. This is intended for testing.

Substitutions

public Substitutions(Date now,
                     int sequence)

Standard constructor, which retrieves an InfoFacade if and when it is needed.

Method Detail

perform

public String perform(String input)

Applies all substitutions. This is not particularly performant, but it won't be called frequently. If passed null returns same.