Updates to the parallel examples, using the new code.

Author: zack-shoylev

rackspace/pom.xml

@@ -26,13 +26,28 @@
   <name>rackspace-examples</name>
 
   <properties>
-    <jclouds.version>1.9.1</jclouds.version>
+    <jclouds.version>2.0.0-SNAPSHOT</jclouds.version>
   </properties>
 
+
+  <!-- Included in case the examples have to run against a snapshot jclouds version -->
   <repositories>
     <repository>
       <id>apache-snapshots</id>
       <url>https://repository.apache.org/content/repositories/snapshots</url>
+      <releases>
+        <enabled>false</enabled>
+      </releases>
+      <snapshots>
+        <enabled>true</enabled>
+      </snapshots>
+    </repository>
+    <repository>
+      <id>sonatype-nexus-snapshots</id>
+      <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+      <releases>
+        <enabled>false</enabled>
+      </releases>
       <snapshots>
         <enabled>true</enabled>
       </snapshots>

rackspace/src/main/java/org/jclouds/examples/rackspace/cloudfiles/UploadLargeObject.java

@@ -26,8 +26,15 @@
 import java.io.Closeable;
 import java.io.File;
 import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.nio.MappedByteBuffer;
+import java.nio.channels.FileChannel;
 import java.util.Properties;
+import java.util.Random;
 import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
 
 import org.jclouds.ContextBuilder;
 import org.jclouds.blobstore.BlobStore;
@@ -36,6 +43,7 @@
 import org.jclouds.io.Payloads;
 import org.jclouds.openstack.swift.v1.blobstore.RegionScopedBlobStoreContext;
 
+import com.google.common.hash.Hashing;
 import com.google.common.io.ByteSource;
 import com.google.common.io.Closeables;
 import com.google.common.io.Files;
@@ -51,34 +59,45 @@ public class UploadLargeObject implements Closeable {
     *
     * The first argument (args[0]) must be your username
     * The second argument (args[1]) must be your API key
-    * The third argument (args[2]) must be the absolute path to a large file
     */
    public static void main(String[] args) throws IOException {
       UploadLargeObject createContainer = new UploadLargeObject(args[0], args[1]);
+      File largeFile = new File("largefile.dat");
+      File downloadedFile = new File(largeFile.getName()+".downloaded");
 
       try {
-         createContainer.uploadLargeObjectFromFile(new File(args[2]));
+         // Create a 200MB file for this example
+         createContainer.createRandomFile(200000000, largeFile);
+         createContainer.uploadLargeObjectFromFile(largeFile);
+         createContainer.downloadLargeObjectToFile(largeFile.getName());
+         System.out.println("Random     file hash: " + Files.hash(largeFile, Hashing.md5()));
+         System.out.println("Downloaded file hash: " + Files.hash(downloadedFile, Hashing.md5()));
       }
       catch (Exception e) {
          e.printStackTrace();
       }
       finally {
+         createContainer.cleanup();
          createContainer.close();
+         if(largeFile.exists()) largeFile.delete();
+         if(downloadedFile.exists()) downloadedFile.delete();
       }
    }
 
    public UploadLargeObject(String username, String apiKey) {
       Properties overrides = new Properties();
       // This property controls the number of parts being uploaded in parallel, the default is 4
-      overrides.setProperty("jclouds.mpu.parallel.degree", "5");
+      overrides.setProperty("jclouds.user-threads", "14");
       // This property controls the size (in bytes) of parts being uploaded in parallel, the default is 33554432 bytes = 32 MB
-      overrides.setProperty("jclouds.mpu.parts.size", "67108864"); // 64 MB
+      overrides.setProperty("jclouds.mpu.parts.size", "1100000"); // 1 MB
 
       RegionScopedBlobStoreContext context = ContextBuilder.newBuilder(PROVIDER)
             .credentials(username, apiKey)
             .overrides(overrides)
             .buildView(RegionScopedBlobStoreContext.class);
       blobStore = context.getBlobStore(REGION);
+
+      blobStore.createContainerInLocation(null, CONTAINER);
    }
 
    /**
@@ -102,7 +121,24 @@ private void uploadLargeObjectFromFile(File largeFile) throws InterruptedExcepti
       // configure the blobstore to use multipart uploading of the file
       String eTag = blobStore.putBlob(CONTAINER, blob, multipart());
 
-      System.out.format("  Uploaded %s eTag=%s", largeFile.getName(), eTag);
+      System.out.format("  Uploaded %s eTag=%s to %s in %s%n", largeFile.getName(), eTag, REGION, CONTAINER);
+   }
+
+   /**
+    * Download a large object from a File using the BlobStore API.
+    *
+    * @throws ExecutionException
+    * @throws InterruptedException
+    */
+   private void downloadLargeObjectToFile(String blobName) throws InterruptedException, ExecutionException {
+      System.out.format("Download large object to file%n");
+
+      blobStore.downloadBlob(CONTAINER, blobName, new File(blobName + ".downloaded"));
+   }
+
+   private void cleanup() {
+      System.out.format("Cleaning up...%n");
+      blobStore.clearContainer(CONTAINER);
    }
 
    /**
@@ -111,4 +147,68 @@ private void uploadLargeObjectFromFile(File largeFile) throws InterruptedExcepti
    public void close() throws IOException {
       Closeables.close(blobStore.getContext(), true);
    }
+
+   /**
+    * Helper method; so that we don't have to add a large file to the repo
+    * @param size File size
+    * @param file The new random file to generate (will overwrite if it exists)
+    * @throws IOException
+    * @throws InterruptedException
+    */
+   private void createRandomFile(long size, File file) throws IOException, InterruptedException {
+      RandomAccessFile raf = null;
+
+      // Reserve space for performance reasons
+      raf = new RandomAccessFile(file.getAbsoluteFile(), "rw");
+      raf.seek(size - 1);
+      raf.write(0);
+
+      // Loop through ranges within the file
+      long from;
+      long to;
+      long partSize = 1000000;
+
+      ExecutorService threadPool = Executors.newFixedThreadPool(16);
+
+      for (from = 0; from < size; from = from + partSize) {
+         to = (from + partSize >= size) ? size - 1 : from + partSize - 1;
+         RandomFileWriter writer = new RandomFileWriter(raf, from, to);
+         threadPool.submit(writer);
+      }
+
+      threadPool.shutdown();
+      threadPool.awaitTermination(1, TimeUnit.DAYS);
+
+      raf.close();
+   }
+
+   /**
+    * Helper class that runs the random file generation
+    */
+   private final class RandomFileWriter implements Runnable {
+      private final RandomAccessFile raf;
+      private final long begin;
+      private final long end;
+
+      RandomFileWriter(RandomAccessFile raf, long begin, long end) {
+         this.raf = raf;
+         this.begin = begin;
+         this.end = end;
+      }
+
+      @Override
+      public void run() {
+         try {
+            byte[] targetArray = new byte[(int) (end - begin + 1)];
+            Random random = new Random();
+            random.nextBytes(targetArray);
+            // Map file region
+            MappedByteBuffer out = raf.getChannel().map(FileChannel.MapMode.READ_WRITE, begin, end - begin + 1);
+            out.put(targetArray);
+            out.force();
+         } catch (IOException e) {
+            throw new RuntimeException(e);
+         }
+      }
+   }
 }