uk.ac.ed.epcc.webapp.config

Class OverrideConfigService

java.lang.Object

uk.ac.ed.epcc.webapp.AbstractContexed

uk.ac.ed.epcc.webapp.config.AbstractConfigService

uk.ac.ed.epcc.webapp.config.OverrideConfigService

All Implemented Interfaces:

AppContextCleanup, AppContextService<ConfigService>, ConfigService, Contexed

public class OverrideConfigService
extends AbstractConfigService

A ConfigService that allows a set of properties to override properties provided by another parent ConfigService

Field Summary

Fields inherited from class uk.ac.ed.epcc.webapp.AbstractContexed

conn

Constructor Summary

Constructors

Constructor and Description
OverrideConfigService(java.util.Properties overrides, AppContext c) Constructs a new OverrideConfigService that will return properties specified in overrides if they are present.
OverrideConfigService(java.util.Properties parent, java.lang.String config_list, AppContext c) Constructs OverrideConfigService where the override properties are loaded from a file.

Method Summary

Modifier and Type	Method and Description
void	addListener(ConfigServiceListener listener) register a ConfigServiceListener
void	cleanup() AppContext is being closed.
void	clearServiceProperties() clear any cached properties.
java.util.Properties	getOverrides()
java.util.Properties	getServiceProperties() return the set of properties defined by the service
void	setProperty(java.lang.String name, java.lang.String value) Set a property This method is for making persistent changes to the configuration.

Methods inherited from class uk.ac.ed.epcc.webapp.config.AbstractConfigService

getType, loadFile, processAdditions

Methods inherited from class uk.ac.ed.epcc.webapp.AbstractContexed

getContext, getLogger, resetLogger

Methods inherited from class java.lang.Object

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

Methods inherited from interface uk.ac.ed.epcc.webapp.Contexed

getContext

Constructor Detail

OverrideConfigService

public OverrideConfigService(java.util.Properties overrides,
                             AppContext c)

Constructs a new OverrideConfigService that will return properties specified in overrides if they are present. overrides does not contain the requested property, parent will be used to fetch the requested property.

Parameters:

overrides - a collection of properties that will override properties stored in parent

c - AppContext

OverrideConfigService

public OverrideConfigService(java.util.Properties parent,
                             java.lang.String config_list,
                             AppContext c)

Constructs OverrideConfigService where the override properties are loaded from a file.

Parameters:

parent - parent Properties for the overrides

config_list - file to load

c - AppContext

Method Detail

clearServiceProperties

public void clearServiceProperties()

Description copied from interface: ConfigService

clear any cached properties. This will cause the properties to be re-read the next time getServiceProperties is called. Implementations are permitted not to cache data in which case this is a No-op.

getServiceProperties

public java.util.Properties getServiceProperties()

Description copied from interface: ConfigService

return the set of properties defined by the service

Returns:

Properties

getOverrides

public java.util.Properties getOverrides()

setProperty

public void setProperty(java.lang.String name,
                        java.lang.String value)
                 throws java.lang.UnsupportedOperationException

Description copied from interface: ConfigService

Set a property This method is for making persistent changes to the configuration. if the service is not capable of making persistent changes it should forward the request to a nested service or throw an UnsupportedOperationException

Throws:

java.lang.UnsupportedOperationException

cleanup

public void cleanup()

Description copied from interface: AppContextCleanup

AppContext is being closed. Only use this for cleanup that can't be handled by normal garbage collection or for state which is never returned by reference.

addListener

public void addListener(ConfigServiceListener listener)

Description copied from interface: ConfigService

register a ConfigServiceListener