com.github.containersolutions.operator.api

Class ResourceControllerAdapter<R extends io.fabric8.kubernetes.client.CustomResource>

java.lang.Object

com.github.containersolutions.operator.api.ResourceControllerAdapter<R>

Type Parameters:

R -

All Implemented Interfaces:

ResourceController<R>

public abstract class ResourceControllerAdapter<R extends io.fabric8.kubernetes.client.CustomResource>
extends Object
implements ResourceController<R>

Provides a more clear interface for the most common use case.

Constructor Summary

Constructors

Constructor and Description
ResourceControllerAdapter()

Method Summary

Modifier and Type	Method and Description
abstract void	createOrUpdate(R resource, Context<R> context)
Optional<R>	createOrUpdateResource(R resource, Context<R> context) The implementation of this operation is required to be idempotent.
abstract void	delete(R resource, Context<R> context)
boolean	deleteResource(R resource, Context<R> context) The implementation should delete the associated component(s).

Methods inherited from class java.lang.Object

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

Constructor Detail

ResourceControllerAdapter

public ResourceControllerAdapter()

Method Detail

deleteResource

public boolean deleteResource(R resource,
                              Context<R> context)

Description copied from interface: ResourceController

The implementation should delete the associated component(s). Note that this is method is called when an object is marked for deletion. After its executed the default finalizer is automatically removed by the framework; unless the return value is false - note that this is almost never the case.

Specified by:

deleteResource in interface ResourceController<R extends io.fabric8.kubernetes.client.CustomResource>

Returns:

true - so the finalizer is automatically removed after the call. false if you don't want to remove the finalizer. Note that this is ALMOST NEVER the case.

createOrUpdateResource

public Optional<R> createOrUpdateResource(R resource,
                                          Context<R> context)

Description copied from interface: ResourceController

The implementation of this operation is required to be idempotent.

Specified by:

createOrUpdateResource in interface ResourceController<R extends io.fabric8.kubernetes.client.CustomResource>

Returns:

The resource is updated in api server if the return value is present within Optional. This the common use cases. However in cases, for example the operator is restarted, and we don't want to have an update call to k8s api to be made unnecessarily, by returning an empty Optional this update can be skipped. However we will always call an update if there is no finalizer on object and its not marked for deletion.

delete

public abstract void delete(R resource,
                            Context<R> context)

createOrUpdate

public abstract void createOrUpdate(R resource,
                                    Context<R> context)