ManagedResource (Solr 8.8.0 API)

java.lang.Object
- org.apache.solr.rest.ManagedResource

Direct Known Subclasses:

ManagedSynonymFilterFactory.SynonymManager, ManagedSynonymGraphFilterFactory.SynonymManager, ManagedWordSetResource
```
public abstract class ManagedResource
extends Object
```
Supports Solr components that have external data that needs to be managed using the REST API.

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static interface`	`ManagedResource.ChildResourceSupport` Marker interface to indicate a ManagedResource implementation class also supports managing child resources at path: /<resource>/{child}

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`INIT_ARGS_JSON_FIELD`
`static String`	`INITIALIZED_ON_JSON_FIELD`
`protected Date`	`initializedOn`
`protected Date`	`lastUpdateSinceInitialization`
`static String`	`MANAGED_JSON_LIST_FIELD`
`static String`	`MANAGED_JSON_MAP_FIELD`
`protected NamedList<Object>`	`managedInitArgs`
`protected SolrResourceLoader`	`solrResourceLoader`
`protected ManagedResourceStorage`	`storage`
`static String`	`UPDATED_SINCE_INIT_JSON_FIELD`

Constructor Summary

Constructors
Modifier	Constructor and Description
`protected`	`ManagedResource(String resourceId, SolrResourceLoader loader, ManagedResourceStorage.StorageIO storageIO)` Initializes this managed resource, including setting up JSON-based storage using the provided storageIO implementation, such as ZK.

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`protected abstract Object`	`applyUpdatesToManagedData(Object updates)` Called during PUT/POST processing to apply updates to the managed data passed from the client.
`protected Map<String,Object>`	`buildMapToStore(Object managedData)` Builds the JSON object to be stored, containing initArgs and managed data fields.
`protected Map<String,Object>`	`convertNamedListToMap(NamedList<?> args)` Converts a NamedList<?> into an ordered Map for returning as JSON.
`protected ManagedResourceStorage`	`createStorage(ManagedResourceStorage.StorageIO storageIO, SolrResourceLoader loader)` Potential extension point allowing concrete implementations to supply their own storage implementation.
`abstract void`	`doDeleteChild(BaseSolrResource endpoint, String childId)` Called to delete a named part (the given childId) of the resource at the given endpoint
`abstract void`	`doGet(BaseSolrResource endpoint, String childId)` Called to retrieve a named part (the given childId) of the resource at the given endpoint
`void`	`doPost(BaseSolrResource endpoint, Object json)` Just calls `doPut(BaseSolrResource,Object)`; override to change the behavior of POST handling.
`void`	`doPut(BaseSolrResource endpoint, Object json)` Applies changes to initArgs or managed data.
`String`	`getInitializedOn()` Returns this resource's initialization timestamp.
`String`	`getResourceId()` Gets the resource ID for this managed resource.
`SolrResourceLoader`	`getResourceLoader()` Returns the resource loader used by this resource.
`Class<? extends BaseSolrResource>`	`getServerResourceClass()` Gets the ServerResource class to register this endpoint with the Rest API router; in most cases, the default RestManager.ManagedEndpoint class is sufficient but ManagedResource implementations can override this method if a different ServerResource class is needed.
`String`	`getUpdatedSinceInitialization()` Returns the timestamp of the most recent update, or null if this resource has not been updated since initialization.
`boolean`	`hasChangesSinceInitialization()` Returns true if this resource has been changed since initialization.
`void`	`loadManagedDataAndNotify(Collection<ManagedResourceObserver> observers)` Called once during core initialization to get the managed data loaded from storage and notify observers.
`protected void`	`notifyObserversDuringInit(NamedList<?> args, Collection<ManagedResourceObserver> observers)` Notifies all registered observers that the ManagedResource is initialized.
`protected abstract void`	`onManagedDataLoadedFromStorage(NamedList<?> managedInitArgs, Object managedData)` Method called after data has been loaded from storage to give the concrete implementation a chance to post-process the data.
`void`	`onResourceDeleted()` Called by the RestManager framework after this resource has been deleted to allow this resource to close and clean-up any resources used by this.
`protected Object`	`processStoredData(Object data)` Processes the stored data.
`protected void`	`reloadFromStorage()` Invoked when this object determines it needs to reload the stored data.
`void`	`storeManagedData(Object managedData)` Persists managed data to the configured storage IO as a JSON object.
`protected boolean`	`updateInitArgs(NamedList<?> updatedArgs)` Called from `doPut(BaseSolrResource,Object)` to update this resource's init args using the given updatedArgs

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - INIT_ARGS_JSON_FIELD
```
public static final String INIT_ARGS_JSON_FIELD
```
    See Also:
    
    Constant Field Values
  - MANAGED_JSON_LIST_FIELD
```
public static final String MANAGED_JSON_LIST_FIELD
```
    See Also:
    
    Constant Field Values
  - MANAGED_JSON_MAP_FIELD
```
public static final String MANAGED_JSON_MAP_FIELD
```
    See Also:
    
    Constant Field Values
  - INITIALIZED_ON_JSON_FIELD
```
public static final String INITIALIZED_ON_JSON_FIELD
```
    See Also:
    
    Constant Field Values
  - UPDATED_SINCE_INIT_JSON_FIELD
```
public static final String UPDATED_SINCE_INIT_JSON_FIELD
```
    See Also:
    
    Constant Field Values
  - solrResourceLoader
```
protected final SolrResourceLoader solrResourceLoader
```
  - storage
```
protected final ManagedResourceStorage storage
```
  - managedInitArgs
```
protected NamedList<Object> managedInitArgs
```
  - initializedOn
```
protected Date initializedOn
```
  - lastUpdateSinceInitialization
```
protected Date lastUpdateSinceInitialization
```
- Constructor Detail
  - ManagedResource
```
protected ManagedResource(String resourceId,
                          SolrResourceLoader loader,
                          ManagedResourceStorage.StorageIO storageIO)
                   throws SolrException
```
    Initializes this managed resource, including setting up JSON-based storage using the provided storageIO implementation, such as ZK.
    
    Throws:
    
    SolrException
- Method Detail
  - loadManagedDataAndNotify
```
public void loadManagedDataAndNotify(Collection<ManagedResourceObserver> observers)
                              throws SolrException
```
    Called once during core initialization to get the managed data loaded from storage and notify observers.
    
    Throws:
    
    SolrException
  - notifyObserversDuringInit
```
protected void notifyObserversDuringInit(NamedList<?> args,
                                         Collection<ManagedResourceObserver> observers)
                                  throws SolrException
```
    Notifies all registered observers that the ManagedResource is initialized. This event only occurs once when the core is loaded. Thus, you need to reload the core to get updates applied to the analysis components that depend on the ManagedResource data.
    
    Throws:
    
    SolrException
  - createStorage
```
protected ManagedResourceStorage createStorage(ManagedResourceStorage.StorageIO storageIO,
                                               SolrResourceLoader loader)
                                        throws SolrException
```
    Potential extension point allowing concrete implementations to supply their own storage implementation. The default implementation uses JSON as the storage format and delegates the loading and saving of JSON bytes to the supplied StorageIO class.
    
    Throws:
    
    SolrException
  - getResourceLoader
```
public SolrResourceLoader getResourceLoader()
```
    Returns the resource loader used by this resource.
  - getResourceId
```
public String getResourceId()
```
    Gets the resource ID for this managed resource.
  - getServerResourceClass
```
public Class<? extends BaseSolrResource> getServerResourceClass()
```
    Gets the ServerResource class to register this endpoint with the Rest API router; in most cases, the default RestManager.ManagedEndpoint class is sufficient but ManagedResource implementations can override this method if a different ServerResource class is needed.
  - updateInitArgs
```
protected boolean updateInitArgs(NamedList<?> updatedArgs)
```
    Called from doPut(BaseSolrResource,Object) to update this resource's init args using the given updatedArgs
  - reloadFromStorage
```
protected void reloadFromStorage()
                          throws SolrException
```
    Invoked when this object determines it needs to reload the stored data.
    
    Throws:
    
    SolrException
  - processStoredData
```
protected Object processStoredData(Object data)
                            throws SolrException
```
    Processes the stored data.
    
    Throws:
    
    SolrException
  - onManagedDataLoadedFromStorage
```
protected abstract void onManagedDataLoadedFromStorage(NamedList<?> managedInitArgs,
                                                       Object managedData)
                                                throws SolrException
```
    Method called after data has been loaded from storage to give the concrete implementation a chance to post-process the data.
    
    Throws:
    
    SolrException
  - storeManagedData
```
public void storeManagedData(Object managedData)
```
    Persists managed data to the configured storage IO as a JSON object.
  - getInitializedOn
```
public String getInitializedOn()
```
    Returns this resource's initialization timestamp.
  - getUpdatedSinceInitialization
```
public String getUpdatedSinceInitialization()
```
    Returns the timestamp of the most recent update, or null if this resource has not been updated since initialization.
  - hasChangesSinceInitialization
```
public boolean hasChangesSinceInitialization()
```
    Returns true if this resource has been changed since initialization.
  - buildMapToStore
```
protected Map<String,Object> buildMapToStore(Object managedData)
```
    Builds the JSON object to be stored, containing initArgs and managed data fields.
  - convertNamedListToMap
```
protected Map<String,Object> convertNamedListToMap(NamedList<?> args)
```
    Converts a NamedList<?> into an ordered Map for returning as JSON.
  - doPost
```
public void doPost(BaseSolrResource endpoint,
                   Object json)
```
    Just calls doPut(BaseSolrResource,Object); override to change the behavior of POST handling.
  - doPut
```
public void doPut(BaseSolrResource endpoint,
                  Object json)
```
    Applies changes to initArgs or managed data.
  - onResourceDeleted
```
public void onResourceDeleted()
                       throws IOException
```
    Called by the RestManager framework after this resource has been deleted to allow this resource to close and clean-up any resources used by this.
    
    Throws:
    
    IOException - if an error occurs in the underlying storage when trying to delete
  - applyUpdatesToManagedData
```
protected abstract Object applyUpdatesToManagedData(Object updates)
```
    Called during PUT/POST processing to apply updates to the managed data passed from the client.
  - doDeleteChild
```
public abstract void doDeleteChild(BaseSolrResource endpoint,
                                   String childId)
```
    Called to delete a named part (the given childId) of the resource at the given endpoint
  - doGet
```
public abstract void doGet(BaseSolrResource endpoint,
                           String childId)
```
    Called to retrieve a named part (the given childId) of the resource at the given endpoint

Class ManagedResource

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

INIT_ARGS_JSON_FIELD

MANAGED_JSON_LIST_FIELD

MANAGED_JSON_MAP_FIELD

INITIALIZED_ON_JSON_FIELD

UPDATED_SINCE_INIT_JSON_FIELD

solrResourceLoader

storage

managedInitArgs

initializedOn

lastUpdateSinceInitialization

Constructor Detail

ManagedResource

Method Detail

loadManagedDataAndNotify

notifyObserversDuringInit

createStorage

getResourceLoader

getResourceId

getServerResourceClass

updateInitArgs

reloadFromStorage

processStoredData

onManagedDataLoadedFromStorage

storeManagedData

getInitializedOn

getUpdatedSinceInitialization

hasChangesSinceInitialization

buildMapToStore

convertNamedListToMap

doPost

doPut

onResourceDeleted

applyUpdatesToManagedData

doDeleteChild

doGet