/*
* 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 org.apache.brooklyn.entity.group.zoneaware;
import java.util.List;
import org.apache.brooklyn.api.entity.Entity;
import org.apache.brooklyn.api.location.Location;
import org.apache.brooklyn.entity.group.DynamicCluster.ZoneFailureDetector;
import com.google.common.base.Predicate;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
public class CombiningZoneFailureDetector implements ZoneFailureDetector {
public static CombiningZoneFailureDetector failIfAny(ZoneFailureDetector... detectors) {
Predicate<List<Boolean>> joiner = new Predicate<List<Boolean>>() {
@Override public boolean apply(List<Boolean> input) {
return input.contains(Boolean.TRUE);
}
};
return new CombiningZoneFailureDetector(joiner, detectors);
}
public static CombiningZoneFailureDetector failIfAll(ZoneFailureDetector... detectors) {
Predicate<List<Boolean>> joiner = new Predicate<List<Boolean>>() {
@Override public boolean apply(List<Boolean> input) {
return input.contains(Boolean.TRUE) && !input.contains(Boolean.FALSE) && !input.contains(null);
}
};
return new CombiningZoneFailureDetector(joiner, detectors);
}
private final Predicate<? super List<Boolean>> joiner;
private final List<ZoneFailureDetector> detectors;
protected CombiningZoneFailureDetector(Predicate<? super List<Boolean>> joiner, ZoneFailureDetector... detectors) {
this.joiner = joiner;
this.detectors = ImmutableList.copyOf(detectors);
}
@Override
public void onStartupSuccess(Location loc, Entity entity) {
for (ZoneFailureDetector detector : detectors) {
detector.onStartupSuccess(loc, entity);
}
}
@Override
public void onStartupFailure(Location loc, Entity entity, Throwable cause) {
for (ZoneFailureDetector detector : detectors) {
detector.onStartupFailure(loc, entity, cause);
}
}
@Override
public boolean hasFailed(Location loc) {
List<Boolean> opinions = Lists.newArrayList();
for (ZoneFailureDetector detector : detectors) {
detector.hasFailed(loc);
}
return joiner.apply(opinions);
}
}