org.bboxdb.distribution.placement.ResourcePlacementStrategy Maven / Gradle / Ivy
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*
* Copyright (C) 2015-2018 the BBoxDB project
*
* 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.bboxdb.distribution.placement;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import org.bboxdb.distribution.membership.BBoxDBInstance;
import org.bboxdb.distribution.membership.BBoxDBInstanceState;
public abstract class ResourcePlacementStrategy {
/**
* Get a set with distributed instances. These instances will be responsible for
* a new resource. The systems from the blacklist are excluded.
*
* @return
* @throws ResourceAllocationException
*/
public abstract BBoxDBInstance getInstancesForNewRessource(final List systems,
final Collection blacklist) throws ResourceAllocationException;
/**
* Get a set with distributed instances. These instances will be responsible for
* a new resource.
*
* @return
* @throws ResourceAllocationException
*/
public BBoxDBInstance getInstancesForNewRessource(final List systems)
throws ResourceAllocationException {
final HashSet emptyBlacklist = new HashSet();
return getInstancesForNewRessource(systems, emptyBlacklist);
}
/**
* Remove all non ready (state != READWRITE) systems
* @param systems
*/
public static void removeAllNonReadySystems(final List systems) {
systems.removeIf(s -> s.getState() != BBoxDBInstanceState.READY);
}
}