org.jclouds.compute.functions.PollNodeRunning.java Source code

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

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.functions;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Throwables.propagate;
import static java.lang.String.format;
import static org.jclouds.compute.config.ComputeServiceProperties.TIMEOUT_NODE_RUNNING;
import static org.jclouds.compute.util.ComputeServiceUtils.formatStatus;

import java.util.concurrent.atomic.AtomicReference;

import javax.inject.Inject;
import javax.inject.Named;

import org.jclouds.compute.domain.NodeMetadata;
import org.jclouds.compute.domain.NodeMetadata.Status;

import com.google.common.base.Function;
import com.google.common.base.Predicate;
import com.google.common.base.Stopwatch;

/**
 * Polls until the node is running or throws {@link IllegalStateException} if
 * this cannot be achieved within the timeout.
 *
 * @author Adrian Cole
 *
 */
@Named(TIMEOUT_NODE_RUNNING)
public class PollNodeRunning implements Function<AtomicReference<NodeMetadata>, AtomicReference<NodeMetadata>> {
    private final Predicate<AtomicReference<NodeMetadata>> nodeRunning;

    @Inject
    public PollNodeRunning(@Named(TIMEOUT_NODE_RUNNING) Predicate<AtomicReference<NodeMetadata>> nodeRunning) {
        this.nodeRunning = checkNotNull(nodeRunning, "nodeRunning");
    }

    /**
     * @param node
     *           will be updated with the node which is running
     * @throws {@link IllegalStateException} if this cannot be achieved within
     *         the timeout.
     */
    @Override
    public AtomicReference<NodeMetadata> apply(AtomicReference<NodeMetadata> node) throws IllegalStateException {
        String originalId = node.get().getId();
        NodeMetadata originalNode = node.get();
        try {
            Stopwatch stopwatch = new Stopwatch().start();
            if (!nodeRunning.apply(node)) {
                long timeWaited = stopwatch.elapsedMillis();
                if (node.get() == null) {
                    node.set(originalNode);
                    throw new IllegalStateException(format("api response for node(%s) was null", originalId));
                } else {
                    throw new IllegalStateException(format(
                            "node(%s) didn't achieve the status running; aborting after %d seconds with final status: %s",
                            originalId, timeWaited / 1000, formatStatus(node.get())));
                }
            }
        } catch (IllegalStateException e) {
            if (node.get().getStatus() == Status.TERMINATED) {
                throw new IllegalStateException(format("node(%s) terminated", originalId));
            } else {
                throw propagate(e);
            }
        }
        return node;
    }
}