/*
* 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.atmos.blobstore.strategy;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Throwables.propagate;
import static org.jclouds.concurrent.FutureIterables.awaitCompletion;
import java.util.Arrays;
import java.util.Map;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.SynchronousQueue;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import javax.annotation.Resource;
import javax.inject.Named;
import javax.inject.Singleton;
import org.jclouds.Constants;
import org.jclouds.atmos.AtmosAsyncClient;
import org.jclouds.atmos.domain.AtmosObject;
import org.jclouds.blobstore.domain.BlobMetadata;
import org.jclouds.blobstore.functions.ObjectMD5;
import org.jclouds.blobstore.internal.BlobRuntimeException;
import org.jclouds.blobstore.options.ListContainerOptions;
import org.jclouds.blobstore.strategy.ContainsValueInListStrategy;
import org.jclouds.blobstore.strategy.ListBlobsInContainer;
import org.jclouds.logging.Logger;
import com.google.common.base.Throwables;
import com.google.common.collect.Maps;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.ListeningExecutorService;
import com.google.inject.Inject;
/**
* Searches Content-MD5 tag for the value associated with the value
*
* @author Adrian Cole
*/
@Singleton
public class FindMD5InUserMetadata implements ContainsValueInListStrategy {
@Resource
protected Logger logger = Logger.NULL;
protected final ObjectMD5 objectMD5;
protected final ListBlobsInContainer getAllBlobMetadata;
private final AtmosAsyncClient client;
private final ListeningExecutorService userExecutor;
/**
* maximum duration of an blob Request
*/
@Inject(optional = true)
@Named(Constants.PROPERTY_REQUEST_TIMEOUT)
protected Long maxTime;
@Inject
FindMD5InUserMetadata(@Named(Constants.PROPERTY_USER_THREADS) ListeningExecutorService userExecutor, ObjectMD5 objectMD5,
ListBlobsInContainer getAllBlobMetadata, AtmosAsyncClient client) {
this.objectMD5 = objectMD5;
this.getAllBlobMetadata = getAllBlobMetadata;
this.client = client;
this.userExecutor = userExecutor;
}
@Override
public boolean execute(final String containerName, Object value, ListContainerOptions options) {
final byte[] toSearch = objectMD5.apply(value);
final BlockingQueue<Boolean> queue = new SynchronousQueue<Boolean>();
Map<String, ListenableFuture<?>> responses = Maps.newHashMap();
for (BlobMetadata md : getAllBlobMetadata.execute(containerName, options)) {
final ListenableFuture<AtmosObject> future = client.headFile(containerName + "/" + md.getName());
future.addListener(new Runnable() {
public void run() {
try {
AtmosObject object = future.get();
checkNotNull(object.getSystemMetadata(), object + " has no content metadata");
if (object.getSystemMetadata().getContentMD5() != null) {
if (Arrays.equals(toSearch, object.getSystemMetadata().getContentMD5())) {
queue.put(true);
}
} else {
logger.debug("object %s has no content md5", object.getSystemMetadata().getObjectID());
}
} catch (InterruptedException e) {
Throwables.propagate(e);
} catch (ExecutionException e) {
Throwables.propagate(e);
}
}
}, userExecutor);
responses.put(md.getName(), future);
}
Map<String, Exception> exceptions;
try {
exceptions = awaitCompletion(responses, userExecutor, maxTime, logger,
String.format("searching for md5 in container %s", containerName));
} catch (TimeoutException te) {
throw propagate(te);
}
if (exceptions.size() > 0)
throw new BlobRuntimeException(String.format("searching for md5 in container %s: %s", containerName,
exceptions));
try {
return queue.poll(1, TimeUnit.MICROSECONDS) != null;
} catch (InterruptedException e) {
Throwables.propagate(e);
return false;
} catch (Exception e) {
Throwables.propagateIfPossible(e, BlobRuntimeException.class);
throw new BlobRuntimeException(String.format("Error searching for ETAG of value: [%s] in container:%s", value,
containerName), e);
}
}
}