/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package gobblin.runtime.api;
import java.net.URI;
import com.google.common.base.Objects;
import gobblin.util.callbacks.Callback;
public interface SpecCatalogListener {
/** Invoked when a new {@link Spec} is added to the catalog and for all pre-existing specs on registration
* of the listener.*/
void onAddSpec(Spec addedSpec);
/**
* Invoked when a {@link Spec} gets removed from the catalog.
*/
public void onDeleteSpec(URI deletedSpecURI, String deletedSpecVersion);
/**
* Invoked when the contents of a {@link Spec} gets updated in the catalog.
*/
public void onUpdateSpec(Spec updatedSpec);
/** A standard implementation of onAddSpec as a functional object */
public static class AddSpecCallback extends Callback<SpecCatalogListener, Void> {
private final Spec _addedSpec;
public AddSpecCallback(Spec addedSpec) {
super(Objects.toStringHelper("onAddSpec").add("addedSpec", addedSpec).toString());
_addedSpec = addedSpec;
}
@Override public Void apply(SpecCatalogListener listener) {
listener.onAddSpec(_addedSpec);
return null;
}
}
/** A standard implementation of onDeleteSpec as a functional object */
public static class DeleteSpecCallback extends Callback<SpecCatalogListener, Void> {
private final URI _deletedSpecURI;
private final String _deletedSpecVersion;
public DeleteSpecCallback(URI deletedSpecURI, String deletedSpecVersion) {
super(Objects.toStringHelper("onDeleteSpec")
.add("deletedSpecURI", deletedSpecURI)
.add("deletedSpecVersion", deletedSpecVersion)
.toString());
_deletedSpecURI = deletedSpecURI;
_deletedSpecVersion = deletedSpecVersion;
}
@Override public Void apply(SpecCatalogListener listener) {
listener.onDeleteSpec(_deletedSpecURI, _deletedSpecVersion);
return null;
}
}
public static class UpdateSpecCallback extends Callback<SpecCatalogListener, Void> {
private final Spec _updatedSpec;
public UpdateSpecCallback(Spec updatedSpec) {
super(Objects.toStringHelper("onUpdateSpec")
.add("updatedSpec", updatedSpec).toString());
_updatedSpec = updatedSpec;
}
@Override
public Void apply(SpecCatalogListener listener) {
listener.onUpdateSpec(_updatedSpec);
return null;
}
}
}