| /** |
| * 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.compute.predicates; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import java.util.Set; |
| |
| import javax.annotation.Resource; |
| import javax.inject.Singleton; |
| |
| import org.jclouds.compute.ComputeService; |
| import org.jclouds.compute.domain.NodeMetadata; |
| import org.jclouds.compute.domain.NodeState; |
| import org.jclouds.logging.Logger; |
| |
| import com.google.common.base.Predicate; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.inject.Inject; |
| |
| /** |
| * |
| * Tests to see if a node is active. |
| * |
| * @author Adrian Cole |
| */ |
| @Singleton |
| public class NodePresentAndInIntendedState implements Predicate<NodeMetadata> { |
| |
| private final ComputeService client; |
| private final NodeState intended; |
| private final Set<NodeState> invalids; |
| @Resource |
| protected Logger logger = Logger.NULL; |
| |
| @Inject |
| public NodePresentAndInIntendedState(NodeState intended, ComputeService client) { |
| this(intended, ImmutableSet.of(NodeState.ERROR), client); |
| } |
| |
| public NodePresentAndInIntendedState(NodeState intended, Set<NodeState> invalids, ComputeService client) { |
| this.intended = intended; |
| this.client = client; |
| this.invalids = invalids; |
| } |
| |
| public boolean apply(NodeMetadata node) { |
| logger.trace("looking for state on node %s", checkNotNull(node, "node")); |
| node = refresh(node); |
| if (node == null) |
| return false; |
| logger.trace("%s: looking for node state %s: currently: %s", node.getId(), intended, node.getState()); |
| if (invalids.contains(node.getState())) |
| throw new IllegalStateException("node " + node.getId() + " in location " + node.getLocation() |
| + " is in invalid state "+node.getState()); |
| return node.getState() == intended; |
| } |
| |
| private NodeMetadata refresh(NodeMetadata node) { |
| if (node == null || node.getId() == null) |
| return null; |
| return client.getNodeMetadata(node.getId()); |
| } |
| } |