| 1 | /** |
| 2 | * Licensed to jclouds, Inc. (jclouds) under one or more |
| 3 | * contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. jclouds licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | package org.jclouds.compute.predicates; |
| 20 | |
| 21 | import static com.google.common.base.Preconditions.checkNotNull; |
| 22 | |
| 23 | import java.util.Set; |
| 24 | |
| 25 | import javax.annotation.Resource; |
| 26 | import javax.inject.Singleton; |
| 27 | |
| 28 | import org.jclouds.compute.ComputeService; |
| 29 | import org.jclouds.compute.domain.NodeMetadata; |
| 30 | import org.jclouds.compute.domain.NodeState; |
| 31 | import org.jclouds.logging.Logger; |
| 32 | |
| 33 | import com.google.common.base.Predicate; |
| 34 | import com.google.common.collect.ImmutableSet; |
| 35 | import com.google.inject.Inject; |
| 36 | |
| 37 | /** |
| 38 | * |
| 39 | * Tests to see if a node is active. |
| 40 | * |
| 41 | * @author Adrian Cole |
| 42 | */ |
| 43 | @Singleton |
| 44 | public class NodePresentAndInIntendedState implements Predicate<NodeMetadata> { |
| 45 | |
| 46 | private final ComputeService client; |
| 47 | private final NodeState intended; |
| 48 | private final Set<NodeState> invalids; |
| 49 | @Resource |
| 50 | protected Logger logger = Logger.NULL; |
| 51 | |
| 52 | @Inject |
| 53 | public NodePresentAndInIntendedState(NodeState intended, ComputeService client) { |
| 54 | this(intended, ImmutableSet.of(NodeState.ERROR), client); |
| 55 | } |
| 56 | |
| 57 | public NodePresentAndInIntendedState(NodeState intended, Set<NodeState> invalids, ComputeService client) { |
| 58 | this.intended = intended; |
| 59 | this.client = client; |
| 60 | this.invalids = invalids; |
| 61 | } |
| 62 | |
| 63 | public boolean apply(NodeMetadata node) { |
| 64 | logger.trace("looking for state on node %s", checkNotNull(node, "node")); |
| 65 | node = refresh(node); |
| 66 | if (node == null) |
| 67 | return false; |
| 68 | logger.trace("%s: looking for node state %s: currently: %s", node.getId(), intended, node.getState()); |
| 69 | if (invalids.contains(node.getState())) |
| 70 | throw new IllegalStateException("node " + node.getId() + " in location " + node.getLocation() |
| 71 | + " is in invalid state "+node.getState()); |
| 72 | return node.getState() == intended; |
| 73 | } |
| 74 | |
| 75 | private NodeMetadata refresh(NodeMetadata node) { |
| 76 | if (node == null || node.getId() == null) |
| 77 | return null; |
| 78 | return client.getNodeMetadata(node.getId()); |
| 79 | } |
| 80 | } |