

Configuration model¶

All recorder guicey configuration is accessible as:

@Inject GuiceyConfigurationInfo info;

Configuration items
Startup stats
Option values and usage info
Parsed configuration values

Configuration items¶

Identity¶

Attention

Configuration items (extensions, installers, bundles etc) are identified with special ItemId objects. This is important because guicey supports multiple instances of the same type.

ItemId object equals behaviour may seem non intuitive (see below).

For classes ItemId is essentially the same as class:

ItemId.from(SomeClass.class).equals(ItemId.from(SomeClass.class)) == true

For instances, item id compute object hash (using System.identityHashCode()). ItemId could be
always created from object instance:

ItemId.from(instance).equals(ItemId.from(instance)) == true

but for different instances obviously:

ItemId.from(instance).equals(ItemId.from(otherInstance)) == false

But instance identity myst also be recognized by class, because otherwise it is hard to analyze items, so:

ItemId.from(instance.getClass()).equals(ItemId.from(otherInstance)) == true

Class identity equals all instance identities of the same class.

This allows you to use ItemId.from(MyBundle.class) to get all instance configs for required bundle types.

Model¶

Each configuration item is stored using model object. All model classes are inherited from ItemInfo:

Model class	Description
ItemInfo	Base class for all models
ClassItemInfo	Base class for class-based models: extension, installer
InstanceItemInfo	Base class for instance-based models: bundles, modules
ExtensionItemInfo	Extension model
InstallerItemInfo	Installer model
ModuleItemInfo	Module model
GuiceyBundleItemInfo	Guicey bundle model
DropwizardBundleItemInfo	Dropwizard bundle model

For example, when you configure extension:

.extensions(MyExtension,class)

Guicey will create new instance of ExtensionItemInfo to store item registration data.

For each registered item registration scope is tracked. It could be

Application (if item registered in main bundle)
Guicey bundle class (for items registered in this bundle)
ClasspathScan (for classes from classpath scan)
etc ..

All scopes are described in ConfigScope enum.

Note

ItemId is also used for scopes, because we may have multiple bundles of the same type and so need to differentiate them as different scopes.

For class based extensions only one model instance will be created for all registrations of the same type. But all registration scopes will be preserved, so it is possible to know all extension duplicate points (and you can see it on diagnostic report)

For instance based extensions, different model instances will be created for different items. So if some object was detected as duplicate, it's id will be only added to original object model (InstanceItemInfo#getDuplicates()) to be able to track duplicates.

Querying model¶

All raw data is actually available through: GuiceyConfigurationInfo#getData(), but GuiceyConfigurationInfo provides many shortcut methods to simplify raw data querying.

Data querying is based on java Predicate usage. Filters class provides common predicate builders. Many examples of it's usage may be found in code.

Note

For some reports it is important to know only types of used configuration items, ignoring duplicates. Special helper is included directly inside ItemId: ItemId.typesOnly(...)

For example, getInstallers() from GuiceyConfigurationInfo:

 public List<Class<FeatureInstaller>> getInstallers() {
    return typesOnly(getData().getItems(ConfigItem.Installer, Filters.enabled()));
}

More advanced queries are applied with predicate composition:

 public List<Class<Object>> getExtensionsRegisteredManually() {
    return typesOnly(getData().getItems(ConfigItem.Extension,
            Filters.<ExtensionItemInfo>enabled()
                    .and(it -> it.getRegistrationScopeType().equals(ConfigScope.Application)
                            || it.getRegistrationScopeType().equals(ConfigScope.GuiceyBundle))));
}

For exact configuration item type you can always get it's configuration model:

@Inject GuiceyConfigurationInfo info;

ItemInfo model = info.getInfo(MyExtension.class)

For instance-based items, you can receive all models for instances of type:

List<BundleItemInfo> models = info.getInfos(MyBundle.class)

And the last example is if you know exact extension instance and wasn't to get it's info:

BundleItemInfo model = info.getData().getInfo(ItemId.from(myBundleInstance))

Instances¶

Bundles and modules are configured by instance and this instance is stored in configuration model.

For example, to obtain all configured (and not disabled) guice modules:

@Inject GuiceConfigurationInfo info;

List<Module> modules = info.getModuleIds().stream()
                           .map(it -> info.getData().<ModuleItemInfo>getInfo(it).getInstance())
                           .collect(Collectors.toList());

Here all used module ids (ItemId) obtained. Then complete configuration model loaded for each item and and instance obtained from model.

Note

It may look overcomplicated to load ids first and only later obtain instances, but it is actually a restriction of the model: correct registration order is preserved on id level and so this way is the only way to get all instances in registration order.

Note

Direct model object load by id shortcut was not added directly to GuiceyConfigurationInfo intentionally to avoid mistakes by accidentally using class-based info loading instead of id-based (which may lead to configuration items loss in your reporting or analysis).

Startup stats¶

Startup stats ar available through: GuiceyConfigurationInfo#getStats().

All available stats are listed in Stat enum. Usage examples see in bundles report renderers.

Options¶

Options usage info is available through: GuiceyConfigurationInfo#getOptions().

Apart from actual option values, it could tell if custom option value was set and if this option value was ever queried (by application).

Configuration tree¶

Parsed configuration object is available through GuiceyConfigurationInfo#getConfigurationTree()