Package org.actioncontroller.config

Class ConfigObserver

java.lang.Object

org.actioncontroller.config.ConfigObserver

All Implemented Interfaces:

FileListener

public class ConfigObserver
extends Object
implements FileListener

Used to monitor a set of configuration files and notify ConfigListeners on initialization and change. Given a directory and an application name, appropriate resources and files are monitored with a ConfigDirectoryLoader. If the system property `profile` or `profiles` is set, additionally scans for all files on the format <applicationName>-<profile>.properties

Constructor Summary

Constructors

Constructor	Description
ConfigObserver(String applicationName)
ConfigObserver(Path configDirectory, String applicationName)
ConfigObserver(Path configDirectory, String applicationName, List<String> profiles)
ConfigObserver(ConfigDirectoryLoader configLoader)

Method Summary

Modifier and Type	Method	Description
protected <T> void	applyConfiguration(ConfigValueListener<T> listener, String prefix, T configuration)
protected void	handleConfigurationChanged(Set<String> changedKeys)
protected void	handleConfigurationChanged(Set<String> changedKeys, ConfigMap newConfiguration)
void	listenToFileChange(String key, Path directory, Predicate<Path> pathPredicate)
ConfigObserver	onBooleanValue(String key, boolean defaultValue, ConfigValueListener<Boolean> listener)
ConfigObserver	onConfigChange(ConfigListener listener)	The generic observer method.
ConfigObserver	onDurationValue(String key, Duration defaultValue, ConfigValueListener<Duration> listener)
ConfigObserver	onInetSocketAddress(String key, int defaultPort, ConfigValueListener<InetSocketAddress> listener)
ConfigObserver	onInetSocketAddress(String key, InetSocketAddress defaultAddress, ConfigValueListener<InetSocketAddress> listener)
ConfigObserver	onInetSocketAddress(String key, ConfigValueListener<Optional<InetSocketAddress>> listener)
ConfigObserver	onIntValue(String key, int defaultValue, ConfigValueListener<Integer> listener)
ConfigObserver	onLongValue(String key, long defaultValue, ConfigValueListener<Long> listener)
ConfigObserver	onPeriodValue(String key, Period defaultValue, ConfigValueListener<Period> listener)
<T> ConfigObserver	onPrefixedOptionalValue(String prefix, ConfigListener.Transformer<T> transformer, ConfigValueListener<Optional<T>> listener)
ConfigObserver	onPrefixedOptionalValue(String prefix, ConfigValueListener<Optional<Map<String,String>>> listener)
<T> ConfigObserver	onPrefixedValue(String prefix, ConfigListener.Transformer<T> transformer, ConfigValueListener<T> listener)
<T> ConfigObserver	onPrefixedValue(String prefix, ConfigValueListener<ConfigMap> listener)
<T> ConfigObserver	onSingleConfigValue(String key, ConfigValueTransformer<String,T> transformer, T defaultValue, ConfigValueListener<T> listener)
<T> ConfigObserver	onSingleOptionalValue(String key, ConfigValueTransformer<String,T> transformer, ConfigValueListener<Optional<T>> listener)
ConfigObserver	onStringListValue(String key, String defaultValue, ConfigValueListener<List<String>> listener)
ConfigObserver	onStringValue(String key, String defaultValue, ConfigValueListener<String> listener)
ConfigObserver	onUrlValue(String key, URL defaultValue, ConfigValueListener<URL> listener)
protected <T> T	transform(ConfigMap configuration, ConfigListener.Transformer<T> transformer)
void	updateConfiguration(Map<String,String> newConfiguration)

Methods inherited from class java.lang.Object

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

Constructor Detail

ConfigObserver

public ConfigObserver(String applicationName)

ConfigObserver

public ConfigObserver(Path configDirectory,
                      String applicationName)

ConfigObserver

public ConfigObserver(Path configDirectory,
                      String applicationName,
                      List<String> profiles)

ConfigObserver

public ConfigObserver(ConfigDirectoryLoader configLoader)

Method Detail

onConfigChange

public ConfigObserver onConfigChange(ConfigListener listener)

The generic observer method. Call ConfigListener.onConfigChanged(java.util.Set<java.lang.String>, org.actioncontroller.config.ConfigMap) on the listener when this method is first called and again each time config changes.

onStringValue

public ConfigObserver onStringValue(String key,
                                    String defaultValue,
                                    ConfigValueListener<String> listener)

onUrlValue

public ConfigObserver onUrlValue(String key,
                                 URL defaultValue,
                                 ConfigValueListener<URL> listener)

onIntValue

public ConfigObserver onIntValue(String key,
                                 int defaultValue,
                                 ConfigValueListener<Integer> listener)

onLongValue

public ConfigObserver onLongValue(String key,
                                  long defaultValue,
                                  ConfigValueListener<Long> listener)

onBooleanValue

public ConfigObserver onBooleanValue(String key,
                                     boolean defaultValue,
                                     ConfigValueListener<Boolean> listener)

onInetSocketAddress

public ConfigObserver onInetSocketAddress(String key,
                                          ConfigValueListener<Optional<InetSocketAddress>> listener)

onInetSocketAddress

public ConfigObserver onInetSocketAddress(String key,
                                          int defaultPort,
                                          ConfigValueListener<InetSocketAddress> listener)

onInetSocketAddress

public ConfigObserver onInetSocketAddress(String key,
                                          InetSocketAddress defaultAddress,
                                          ConfigValueListener<InetSocketAddress> listener)

onDurationValue

public ConfigObserver onDurationValue(String key,
                                      Duration defaultValue,
                                      ConfigValueListener<Duration> listener)

onPeriodValue

public ConfigObserver onPeriodValue(String key,
                                    Period defaultValue,
                                    ConfigValueListener<Period> listener)

onStringListValue

public ConfigObserver onStringListValue(String key,
                                        String defaultValue,
                                        ConfigValueListener<List<String>> listener)

onPrefixedValue

public <T> ConfigObserver onPrefixedValue(String prefix,
                                          ConfigValueListener<ConfigMap> listener)

onPrefixedValue

public <T> ConfigObserver onPrefixedValue(String prefix,
                                          ConfigListener.Transformer<T> transformer,
                                          ConfigValueListener<T> listener)

onSingleConfigValue

public <T> ConfigObserver onSingleConfigValue(String key,
                                              ConfigValueTransformer<String,T> transformer,
                                              T defaultValue,
                                              ConfigValueListener<T> listener)

onSingleOptionalValue

public <T> ConfigObserver onSingleOptionalValue(String key,
                                                ConfigValueTransformer<String,T> transformer,
                                                ConfigValueListener<Optional<T>> listener)

onPrefixedOptionalValue

public <T> ConfigObserver onPrefixedOptionalValue(String prefix,
                                                  ConfigListener.Transformer<T> transformer,
                                                  ConfigValueListener<Optional<T>> listener)

onPrefixedOptionalValue

public ConfigObserver onPrefixedOptionalValue(String prefix,
                                              ConfigValueListener<Optional<Map<String,String>>> listener)

transform

protected <T> T transform(ConfigMap configuration,
                          ConfigListener.Transformer<T> transformer)

applyConfiguration

protected <T> void applyConfiguration(ConfigValueListener<T> listener,
                                      String prefix,
                                      T configuration)

updateConfiguration

public void updateConfiguration(Map<String,String> newConfiguration)

handleConfigurationChanged

protected void handleConfigurationChanged(Set<String> changedKeys)

handleConfigurationChanged

protected void handleConfigurationChanged(Set<String> changedKeys,
                                          ConfigMap newConfiguration)

listenToFileChange

public void listenToFileChange(String key,
                               Path directory,
                               Predicate<Path> pathPredicate)

Specified by:

listenToFileChange in interface FileListener