org.jclouds.googlecompute.compute.functions.OrphanedGroupsFromDeadNodes.java Source code

Introduction

Here is the source code for org.jclouds.googlecompute.compute.functions.OrphanedGroupsFromDeadNodes.java

Source

/*
 * Licensed to jclouds, Inc. (jclouds) under one or more
 * contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  jclouds 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.jclouds.googlecompute.compute.functions;

import com.google.common.base.Function;
import com.google.common.base.Predicate;
import com.google.common.collect.Sets;
import org.jclouds.compute.domain.NodeMetadata;

import javax.inject.Inject;
import javax.inject.Singleton;
import java.util.Set;

/**
 * @author David Alves
 */
@Singleton
public class OrphanedGroupsFromDeadNodes implements Function<Set<? extends NodeMetadata>, Set<String>> {

    private final Predicate<String> isOrphanedGroupPredicate;

    @Inject
    public OrphanedGroupsFromDeadNodes(Predicate<String> isOrphanedGroupPredicate) {
        this.isOrphanedGroupPredicate = isOrphanedGroupPredicate;
    }

    @Override
    public Set<String> apply(Set<? extends NodeMetadata> deadNodes) {
        Set<String> groups = Sets.newLinkedHashSet();
        for (NodeMetadata deadNode : deadNodes) {
            groups.add(deadNode.getGroup());
        }
        Set<String> orphanedGroups = Sets.newLinkedHashSet();
        for (String group : groups) {
            if (isOrphanedGroupPredicate.apply(group)) {
                orphanedGroups.add(group);
            }
        }
        return orphanedGroups;
    }

}