/**
* Licensed 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 org.apache.aurora.scheduler.events;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import java.util.Set;
import javax.inject.Inject;
import javax.inject.Qualifier;
import org.apache.aurora.scheduler.ResourceSlot;
import org.apache.aurora.scheduler.events.PubsubEvent.Vetoed;
import org.apache.aurora.scheduler.filter.AttributeAggregate;
import org.apache.aurora.scheduler.filter.SchedulingFilter;
import org.apache.aurora.scheduler.storage.entities.IHostAttributes;
import org.apache.aurora.scheduler.storage.entities.ITaskConfig;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import static java.util.Objects.requireNonNull;
/**
* A decorating scheduling filter that sends an event when a scheduling assignment is vetoed.
*/
class NotifyingSchedulingFilter implements SchedulingFilter {
/**
* Binding annotation that the underlying {@link SchedulingFilter} must be bound with.
*/
@Qualifier
@Target({FIELD, PARAMETER, METHOD}) @Retention(RUNTIME)
public @interface NotifyDelegate { }
private final SchedulingFilter delegate;
private final EventSink eventSink;
@Inject
NotifyingSchedulingFilter(
@NotifyDelegate SchedulingFilter delegate,
EventSink eventSink) {
this.delegate = requireNonNull(delegate);
this.eventSink = requireNonNull(eventSink);
}
@Override
public Set<Veto> filter(
ResourceSlot offer,
IHostAttributes hostAttributes,
ITaskConfig task,
String taskId,
AttributeAggregate jobState) {
Set<Veto> vetoes = delegate.filter(offer, hostAttributes, task, taskId, jobState);
if (!vetoes.isEmpty()) {
eventSink.post(new Vetoed(taskId, vetoes));
}
return vetoes;
}
}