de.uniulm.omi.cloudiator.sword.drivers.openstack.strategy.CompositeFloatingIpPoolStrategy.java Source code

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Here is the source code for de.uniulm.omi.cloudiator.sword.drivers.openstack.strategy.CompositeFloatingIpPoolStrategy.java

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/*
 * Copyright (c) 2014-2018 University of Ulm
 *
 * See the NOTICE file distributed with this work for additional information
 * regarding copyright ownership.  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 de.uniulm.omi.cloudiator.sword.drivers.openstack.strategy;

import com.google.common.base.Optional;
import java.util.Set;

/**
 * Composite pattern for floating ip pool strategies.
 */
public class CompositeFloatingIpPoolStrategy implements FloatingIpPoolStrategy {

    private final Set<FloatingIpPoolStrategy> strategies;

    public CompositeFloatingIpPoolStrategy(Set<FloatingIpPoolStrategy> strategies) {
        this.strategies = strategies;
    }

    @Override
    public Optional<String> apply(String virtualMachine) {
        for (FloatingIpPoolStrategy strategy : strategies) {
            final Optional<String> optionalPool = strategy.apply(virtualMachine);
            if (optionalPool.isPresent()) {
                return optionalPool;
            }
        }
        return Optional.absent();
    }
}