Implements SeekableDownloadChannel

The SeekableDownloadChannel implements SeekableByteChannel and allows to
set the position of the channel and read data from that point onward.
The SeekableDownloadChannel implementation, creates a new internal
DownloadChannel at every call to position(long), that will create a
resume channel onto that point, thus, not all service implementations
are supported.

httpchannel-util/src/main/java/com/rogiel/httpchannel/service/AbstractDownloader.java

@@ -22,6 +22,7 @@ import com.rogiel.httpchannel.service.exception.DownloadNotResumableException;
  */
 public abstract class AbstractDownloader<C extends DownloaderConfiguration>
 		implements Downloader<C> {
+	protected final DownloadService<?> service;
 	/**
 	 * The download URI
 	 */
@@ -35,12 +36,16 @@ public abstract class AbstractDownloader<C extends DownloaderConfiguration>
 	/**
 	 * Creates a new instance
 	 * 
+	 * @param service
+	 *            the download service
 	 * @param uri
 	 *            the download uri
 	 * @param configuration
 	 *            the configuration object
 	 */
-	protected AbstractDownloader(URI uri, C configuration) {
+	protected AbstractDownloader(DownloadService<?> service, URI uri,
+			C configuration) {
+		this.service = service;
 		this.uri = uri;
 		this.configuration = configuration;
 	}
@@ -69,7 +74,8 @@ public abstract class AbstractDownloader<C extends DownloaderConfiguration>
 
 	protected InputStreamDownloadChannel createInputStreamChannel(
 			InputStream in, long length, String filename) {
-		return new InputStreamDownloadChannel(in, length, filename);
+		return new InputStreamDownloadChannel(service, this, in, length,
+				filename);
 	}
 
 	@Override

httpchannel-util/src/main/java/com/rogiel/httpchannel/service/AbstractHttpDownloader.java

@@ -38,9 +38,10 @@ import com.rogiel.httpchannel.util.ThreadUtils;
 public abstract class AbstractHttpDownloader<C extends DownloaderConfiguration>
 		extends AbstractDownloader<C> implements Downloader<C> {
 	private final Logger logger = LoggerFactory.getLogger(this.getClass());
-	
-	protected AbstractHttpDownloader(URI uri, C configuration) {
-		super(uri, configuration);
+
+	protected AbstractHttpDownloader(DownloadService<?> service, URI uri,
+			C configuration) {
+		super(service, uri, configuration);
 	}
 
 	protected long getContentLength(HttpResponse response) {

httpchannel-util/src/main/java/com/rogiel/httpchannel/service/AbstractUploader.java

@@ -15,7 +15,17 @@ import com.rogiel.httpchannel.service.channel.LinkedUploadChannel.LinkedUploadCh
  */
 public abstract class AbstractUploader<C extends UploaderConfiguration>
 		implements Uploader<C> {
+	/**
+	 * The upload service
+	 */
+	protected final UploadService<?> service;
+	/**
+	 * The name of the file to be uploaded
+	 */
 	protected final String filename;
+	/**
+	 * The size of the file to be uploaded
+	 */
 	protected final long filesize;
 
 	/**
@@ -26,6 +36,8 @@ public abstract class AbstractUploader<C extends UploaderConfiguration>
 	/**
 	 * Creates a new instance
 	 * 
+	 * @param service
+	 *            the upload service
 	 * @param filename
 	 *            the file name
 	 * @param filesize
@@ -33,7 +45,9 @@ public abstract class AbstractUploader<C extends UploaderConfiguration>
 	 * @param configuration
 	 *            the configuration object
 	 */
-	public AbstractUploader(String filename, long filesize, C configuration) {
+	public AbstractUploader(UploadService<?> service, String filename,
+			long filesize, C configuration) {
+		this.service = service;
 		this.filename = filename;
 		this.filesize = filesize;
 		this.configuration = configuration;
@@ -48,7 +62,8 @@ public abstract class AbstractUploader<C extends UploaderConfiguration>
 	 */
 	protected LinkedUploadChannel createLinkedChannel(
 			LinkedUploadChannelCloseCallback closeCallback) {
-		return new LinkedUploadChannel(closeCallback, filesize, filename);
+		return new LinkedUploadChannel(service, this, closeCallback, filesize,
+				filename);
 	}
 
 	@Override

httpchannel-util/src/main/java/com/rogiel/httpchannel/service/channel/InputStreamDownloadChannel.java

@@ -23,7 +23,8 @@ import java.nio.channels.Channels;
 import java.nio.channels.ReadableByteChannel;
 
 import com.rogiel.httpchannel.service.DownloadChannel;
-
+import com.rogiel.httpchannel.service.DownloadService;
+import com.rogiel.httpchannel.service.Downloader;
 
 /**
  * @author <a href="http://www.rogiel.com">Rogiel</a>
@@ -32,11 +33,17 @@ import com.rogiel.httpchannel.service.DownloadChannel;
 public class InputStreamDownloadChannel implements DownloadChannel {
 	private final ReadableByteChannel channel;
 
+	private final DownloadService<?> service;
+	private final Downloader<?> downloader;
+
 	private final long length;
 	private final String filename;
 
-	public InputStreamDownloadChannel(InputStream in, final long length,
+	public InputStreamDownloadChannel(DownloadService<?> service,
+			Downloader<?> downloader, InputStream in, final long length,
 			final String filename) {
+		this.service = service;
+		this.downloader = downloader;
 		this.channel = Channels.newChannel(in);
 		this.length = length;
 		this.filename = filename;
@@ -58,12 +65,22 @@ public class InputStreamDownloadChannel implements DownloadChannel {
 	}
 
 	@Override
-	public long getFilesize() {
+	public long size() {
 		return length;
 	}
 
 	@Override
-	public String getFilename() {
+	public String filename() {
 		return filename;
 	}
+
+	@Override
+	public DownloadService<?> getService() {
+		return service;
+	}
+
+	@Override
+	public Downloader<?> getDownloader() {
+		return downloader;
+	}
 }

httpchannel-util/src/main/java/com/rogiel/httpchannel/service/channel/LinkedUploadChannel.java

@@ -27,6 +27,8 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import com.rogiel.httpchannel.service.UploadChannel;
+import com.rogiel.httpchannel.service.UploadService;
+import com.rogiel.httpchannel.service.Uploader;
 import com.rogiel.httpchannel.service.exception.UploadLinkNotFoundException;
 
 /**
@@ -41,6 +43,15 @@ public class LinkedUploadChannel implements UploadChannel {
 	 */
 	private final Logger logger = LoggerFactory.getLogger(this.getClass());
 
+	/**
+	 * The upload service
+	 */
+	private final UploadService<?> service;
+	/**
+	 * The uploader instance
+	 */
+	private final Uploader<?> uploader;
+
 	/**
 	 * The destionation {@link Channel}. Data writted is forwarded to this
 	 * channel.
@@ -69,8 +80,11 @@ public class LinkedUploadChannel implements UploadChannel {
 	 */
 	private boolean open = true;
 
-	public LinkedUploadChannel(LinkedUploadChannelCloseCallback closeCallback,
-			long filesize, String filename) {
+	public LinkedUploadChannel(UploadService<?> service, Uploader<?> uploader,
+			LinkedUploadChannelCloseCallback closeCallback, long filesize,
+			String filename) {
+		this.service = service;
+		this.uploader = uploader;
 		this.closeCallback = closeCallback;
 		this.filename = filename;
 		this.length = filesize;
@@ -110,12 +124,12 @@ public class LinkedUploadChannel implements UploadChannel {
 	}
 
 	@Override
-	public long getFilesize() {
+	public long size() {
 		return length;
 	}
 
 	@Override
-	public String getFilename() {
+	public String filename() {
 		return filename;
 	}
 
@@ -124,6 +138,16 @@ public class LinkedUploadChannel implements UploadChannel {
 		return downloadLink;
 	}
 
+	@Override
+	public UploadService<?> getService() {
+		return service;
+	}
+
+	@Override
+	public Uploader<?> getUploader() {
+		return uploader;
+	}
+
 	/**
 	 * Links this {@link Channel} to the destionation {@link Channel}. All data
 	 * written in this channel will be redirected to the destination

httpchannel-util/src/main/java/com/rogiel/httpchannel/service/channel/LinkedUploadChannelContentBody.java

@@ -42,7 +42,7 @@ public class LinkedUploadChannelContentBody extends AbstractContentBody {
 
 	@Override
 	public String getFilename() {
-		return channel.getFilename();
+		return channel.filename();
 	}
 
 	@Override
@@ -64,7 +64,7 @@ public class LinkedUploadChannelContentBody extends AbstractContentBody {
 
 	@Override
 	public long getContentLength() {
-		return channel.getFilesize();
+		return channel.size();
 	}
 
 	@Override