org.jclouds.samples.googleappengine.functions.BlobStoreContextToContainerResult.java Source code

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Here is the source code for org.jclouds.samples.googleappengine.functions.BlobStoreContextToContainerResult.java

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/**
 *
 * Copyright (C) 2009 Cloud Conscious, LLC. <info@cloudconscious.com>
 *
 * ====================================================================
 * 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.samples.googleappengine.functions;

import java.util.Map;

import javax.annotation.Resource;
import javax.inject.Inject;
import javax.inject.Singleton;

import org.jclouds.blobstore.BlobStoreContext;
import org.jclouds.blobstore.ContainerNotFoundException;
import org.jclouds.blobstore.domain.ResourceMetadata;
import org.jclouds.blobstore.domain.ResourceType;
import org.jclouds.logging.Logger;
import org.jclouds.samples.googleappengine.domain.ContainerResult;

import com.google.common.base.Function;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.common.collect.Sets;

@Singleton
public class BlobStoreContextToContainerResult implements Function<String, ContainerResult> {
    private final class BuildContainerResult implements Function<ResourceMetadata, ContainerResult> {
        private final String host;
        private final BlobStoreContext<?, ?> context;
        private final String contextName;

        private BuildContainerResult(String host, BlobStoreContext<?, ?> context, String contextName) {
            this.host = host;
            this.context = context;
            this.contextName = contextName;
        }

        public ContainerResult apply(ResourceMetadata from) {
            String status;
            try {
                try {
                    long start = System.currentTimeMillis();
                    context.getBlobStore().exists(from.getName());
                    status = ((System.currentTimeMillis() - start) + "ms");
                } catch (ContainerNotFoundException ex) {
                    status = ("not found");
                }
            } catch (Exception e) {
                logger.error(e, "Error listing container %s//%s", contextName, from);
                status = (e.getMessage());
            }
            return new ContainerResult(contextName, host, from.getName(), status);
        }
    }

    @Inject
    private Map<String, BlobStoreContext<?, ?>> contexts;

    @Resource
    protected Logger logger = Logger.NULL;

    public ContainerResult apply(final String contextName) {
        final BlobStoreContext<?, ?> context = contexts.get(contextName);
        final String host = context.getEndPoint().getHost();
        try {
            ResourceMetadata md = Iterables.getLast(Sets
                    .newTreeSet(Iterables.filter(context.getBlobStore().list(), new Predicate<ResourceMetadata>() {

                        public boolean apply(ResourceMetadata input) {
                            return input.getType() == ResourceType.CONTAINER;
                        }

                    })));
            return new BuildContainerResult(host, context, contextName).apply(md);
        } catch (Exception e) {
            ContainerResult result = new ContainerResult(contextName, host, null, e.getMessage());
            logger.error(e, "Error listing service %s", contextName);
            return result;
        }

    }
}