org.eclipse.ecf.provider.filetransfer.retrieve
Class AbstractRetrieveFileTransfer

java.lang.Object
  org.eclipse.ecf.provider.filetransfer.retrieve.AbstractRetrieveFileTransfer

All Implemented Interfaces:

org.eclipse.core.runtime.IAdaptable, IIdentifiable, IFileTransfer, IFileTransferPausable, IIncomingFileTransfer, IRetrieveFileTransferContainerAdapter, IRetrieveFileTransfer

Direct Known Subclasses:

HttpClientRetrieveFileTransfer, UrlConnectionRetrieveFileTransfer

public abstract class AbstractRetrieveFileTransfer
extends java.lang.Object
implements IIncomingFileTransfer, IRetrieveFileTransfer, IFileTransferPausable

Field Summary

protected int	buff_length
protected long	bytesReceived
protected boolean	closeOutputStream
protected IConnectContext	connectContext
static int	DEFAULT_BUF_LENGTH
protected boolean	done
protected double	downloadRateBytesPerSecond
protected java.lang.Exception	exception
protected long	fileLength
protected org.eclipse.core.runtime.jobs.Job	job
protected long	lastModifiedTime
protected IFileTransferListener	listener
protected java.io.OutputStream	localFileContents
protected java.util.Map	options
protected boolean	paused
protected Proxy	proxy
protected IFileRangeSpecification	rangeSpecification
protected java.io.InputStream	remoteFileContents
protected IFileID	remoteFileID
protected java.net.URL	remoteFileURL
protected long	transferStartTime

Constructor Summary

AbstractRetrieveFileTransfer()

Method Summary

void	cancel() Cancel this file transfer.
protected java.lang.String	createJobName()
protected java.lang.String	createRangeName()
protected abstract boolean	doPause() Subclass overridable version of pause().
protected abstract boolean	doResume() Subclass overridable version of resume().
protected void	fireReceiveResumedEvent()
protected void	fireReceiveStartEvent()
protected void	fireTransferReceiveDataEvent()
protected void	fireTransferReceiveDoneEvent()
protected void	fireTransferReceivePausedEvent()
java.lang.Object	getAdapter(java.lang.Class adapter)
long	getBytesReceived() Get number of bytes received so far.
java.lang.Exception	getException() Get any exception associated with this file transfer.
long	getFileLength() Return resulting file length (in bytes) for this file transfer instance.
IFileRangeSpecification	getFileRangeSpecification() Get file range specification for this incoming file transfer instance.
protected org.eclipse.core.runtime.IStatus	getFinalStatus(java.lang.Throwable exception1)
ID	getID() Return the ID for this 'identifiable' object.
IFileTransferListener	getListener() Get listener assigned to this incoming file transfer.
protected java.util.Map	getOptions()
double	getPercentComplete() Get the percent complete for this file transfer.
java.lang.String	getRemoteFileName() Obtains the name of the remote file if possible.
protected java.net.URL	getRemoteFileURL()
java.util.Date	getRemoteLastModified() Obtains the timestamp that reflects the time when the remote file was last modified if possible.
Namespace	getRetrieveNamespace() Get namespace to be used for creation of remoteFileID for retrieve request.
protected void	handleReceivedData(byte[] buf, int bytes, double factor, org.eclipse.core.runtime.IProgressMonitor monitor)
protected void	hardClose()
boolean	isDone() Return true if this file transfer is done, false if not yet completed.
boolean	isPaused()
protected abstract void	openStreams() Open incoming and outgoing streams associated with this file transfer.
boolean	pause() Pause file transfer.
boolean	resume() Resume file transfer after having been paused.
protected org.eclipse.core.net.proxy.IProxyData	selectProxyFromProxies(java.lang.String protocol, org.eclipse.core.net.proxy.IProxyData[] proxies) Select a single proxy from a set of proxies available for the given host.
void	sendRetrieveRequest(IFileID rFileID, IFileRangeSpecification rangeSpec, IFileTransferListener transferListener, java.util.Map ops) Send request for transfer of a remote file to local file storage.
void	sendRetrieveRequest(IFileID remoteFileID1, IFileTransferListener transferListener, java.util.Map options1) Send request for transfer of a remote file to local file storage.
protected void	setCloseOutputStream(boolean close)
void	setConnectContextForAuthentication(IConnectContext connectContext) Set connect context for authentication upon subsequent IRetrieveFileTransferContainerAdapter.sendRetrieveRequest(IFileID, IFileTransferListener, Map).
protected void	setFileLength(long length)
protected void	setInputStream(java.io.InputStream ins)
protected void	setLastModifiedTime(long timestamp)
protected void	setOutputStream(java.io.OutputStream outs)
void	setProxy(Proxy proxy) Set proxy for use upon subsequent IRetrieveFileTransferContainerAdapter.sendRetrieveRequest(IFileID, IFileTransferListener, Map).
protected void	setupAndScheduleJob(FileTransferJob fileTransferJob)
protected void	setupProxies()
protected abstract void	setupProxy(Proxy proxy) Setup ECF proxy.
static java.lang.String	toHumanReadableBytes(double size)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_BUF_LENGTH

public static final int DEFAULT_BUF_LENGTH

See Also:

Constant Field Values

job

protected org.eclipse.core.runtime.jobs.Job job

remoteFileURL

protected java.net.URL remoteFileURL

remoteFileID

protected IFileID remoteFileID

listener

protected IFileTransferListener listener

buff_length

protected int buff_length

done

protected boolean done

bytesReceived

protected long bytesReceived

remoteFileContents

protected java.io.InputStream remoteFileContents

localFileContents

protected java.io.OutputStream localFileContents

closeOutputStream

protected boolean closeOutputStream

exception

protected java.lang.Exception exception

fileLength

protected long fileLength

lastModifiedTime

protected long lastModifiedTime

options

protected java.util.Map options

paused

protected boolean paused

rangeSpecification

protected IFileRangeSpecification rangeSpecification

proxy

protected Proxy proxy

connectContext

protected IConnectContext connectContext

transferStartTime

protected long transferStartTime

downloadRateBytesPerSecond

protected double downloadRateBytesPerSecond

Constructor Detail

AbstractRetrieveFileTransfer

public AbstractRetrieveFileTransfer()

Method Detail

getRemoteFileURL

protected java.net.URL getRemoteFileURL()

setInputStream

protected void setInputStream(java.io.InputStream ins)

setOutputStream

protected void setOutputStream(java.io.OutputStream outs)

setCloseOutputStream

protected void setCloseOutputStream(boolean close)

setFileLength

protected void setFileLength(long length)

setLastModifiedTime

protected void setLastModifiedTime(long timestamp)

getOptions

protected java.util.Map getOptions()

handleReceivedData

protected void handleReceivedData(byte[] buf,
                                  int bytes,
                                  double factor,
                                  org.eclipse.core.runtime.IProgressMonitor monitor)
                           throws java.io.IOException

Throws:

java.io.IOException

toHumanReadableBytes

public static java.lang.String toHumanReadableBytes(double size)

getID

public ID getID()

Description copied from interface: IIdentifiable

Return the ID for this 'identifiable' object. The returned ID should be unique within its namespace. May return null.

Specified by:

getID in interface IIdentifiable

Returns:

the ID for this identifiable object. May return null.

getFinalStatus

protected org.eclipse.core.runtime.IStatus getFinalStatus(java.lang.Throwable exception1)

hardClose

protected void hardClose()

fireTransferReceivePausedEvent

protected void fireTransferReceivePausedEvent()

fireTransferReceiveDoneEvent

protected void fireTransferReceiveDoneEvent()

fireTransferReceiveDataEvent

protected void fireTransferReceiveDataEvent()

setConnectContextForAuthentication

public void setConnectContextForAuthentication(IConnectContext connectContext)

Description copied from interface: IRetrieveFileTransferContainerAdapter

Set connect context for authentication upon subsequent IRetrieveFileTransferContainerAdapter.sendRetrieveRequest(IFileID, IFileTransferListener, Map). This method should be called with a non-null connectContext in order to allow authentication to occur during call to IRetrieveFileTransferContainerAdapter.sendRetrieveRequest(IFileID, IFileTransferListener, Map).

Specified by:

setConnectContextForAuthentication in interface IRetrieveFileTransferContainerAdapter

Parameters:

connectContext - the connect context to use for authenticating during subsequent call to IRetrieveFileTransferContainerAdapter.sendRetrieveRequest(IFileID, IFileTransferListener, Map). If null, then no authentication will be attempted.

setProxy

public void setProxy(Proxy proxy)

Description copied from interface: IRetrieveFileTransferContainerAdapter

Set proxy for use upon subsequent IRetrieveFileTransferContainerAdapter.sendRetrieveRequest(IFileID, IFileTransferListener, Map). This method should be called with proxy to allow the given proxy to be used in subsequent calls to IRetrieveFileTransferContainerAdapter.sendRetrieveRequest(IFileID, IFileTransferListener, Map).

When proxy is null or has not been called providers must use the org.eclipse.core.net proxy API to obtain proxy information and proxy credentials if they support proxies of the type(s) supported by that API. The API is provided by an OSGi service of type org.eclipse.core.net.proxy.IProxyService.

If no information is available via IProxyService providers may use other defaults.

Specified by:

setProxy in interface IRetrieveFileTransferContainerAdapter

Parameters:

proxy - the proxy to use for subsequent calls to IRetrieveFileTransferContainerAdapter.sendRetrieveRequest(IFileID, IFileTransferListener, Map). If null, then proxy information is obtained from IProxyService if available. Otherwise provider defined defaults may be used.

getBytesReceived

public long getBytesReceived()

Description copied from interface: IIncomingFileTransfer

Get number of bytes received so far. If provider does not support reporting the number of bytes received, will return -1.

Specified by:

getBytesReceived in interface IIncomingFileTransfer

Returns:

long number of bytes received. Returns -1 if provider does not support reporting of number of bytes received during transfer

cancel

public void cancel()

Description copied from interface: IFileTransfer

Cancel this file transfer. If file transfer has already been completed, then this method has no effect. If the file transfer has not been completed then calling this method will result in an IFileTransferEvent being delivered to the IFileTransferListener indicating that transfer is done (IFileTransfer.isDone() returns true), and some exception will be made available

Specified by:

cancel in interface IFileTransfer

getException

public java.lang.Exception getException()

Description copied from interface: IFileTransfer

Get any exception associated with this file transfer. The value returned from this method is valid only if IFileTransfer.isDone() method returns true. If the file transfer completed successfully, IFileTransfer.isDone() will return true, and this method will return null. If the file transfer completed unsuccessfully (some exception occurred), then IFileTransfer.isDone() will return true, and this method will return a non-null Exception instance that occurred.

If the the file transfer was canceled by the user, then the exception returned will be an instance of UserCancelledException.

Specified by:

getException in interface IFileTransfer

Returns:

Exception associated with this file transfer. null if transfer completed successfully, non-null if transfer completed with some exception. Only valid after IFileTransfer.isDone() returns true.

getPercentComplete

public double getPercentComplete()

Description copied from interface: IFileTransfer

Get the percent complete for this file transfer. The returned value will be either -1.0, meaning that the underlying provider does not support reporting percent complete for this file transfer, or a value between 0 and 1 reflecting the percent complete for this file transfer. If 0.0 no data has been sent, if 1.0, the file transfer is 100 percent complete. The value returned from this method should not be used to determine whether the transfer has completed, as it may not show completion in the event of an transfer failure. Note that the IFileTransfer.isDone() method should be consulted to determine if the file transfer has completed (with or without error).

Specified by:

getPercentComplete in interface IFileTransfer

Returns:

double percent complete. Returns -1.0 if the underlying provider does not support reporting percentage complete, or between 0 and 1 to indicate actual percent complete for this file transfer

getFileLength

public long getFileLength()

Description copied from interface: IFileTransfer

Return resulting file length (in bytes) for this file transfer instance. If the length is not known, -1 will be returned. Note that if a IFileRangeSpecification is provided that the returned file length is the expected file length of just the range retrieved (and not the entire file).

Specified by:

getFileLength in interface IFileTransfer

getRemoteLastModified

public java.util.Date getRemoteLastModified()

Description copied from interface: IIncomingFileTransfer

Obtains the timestamp that reflects the time when the remote file was last modified if possible.

Specified by:

getRemoteLastModified in interface IIncomingFileTransfer

Returns:

The time the remote file was last modified or null if that information was not available.

isDone

public boolean isDone()

Description copied from interface: IFileTransfer

Return true if this file transfer is done, false if not yet completed. The file transfer can be completed successfully, or an exception can occur and the file transfer will have failed. In either case of successful or unsuccessful transfer, this method will return true when the file transfer is complete. To determine whether the transfer completed successfully, it is necessary to also consult the IFileTransfer.getException() method.

Specified by:

isDone in interface IFileTransfer

Returns:

boolean true if file transfer is done, false if file transfer is still in progress.

getAdapter

public java.lang.Object getAdapter(java.lang.Class adapter)

Specified by:

getAdapter in interface org.eclipse.core.runtime.IAdaptable

openStreams

protected abstract void openStreams()
                             throws IncomingFileTransferException

Open incoming and outgoing streams associated with this file transfer. Subclasses must implement this method to open input and output streams. The remoteFileContents and localFileContent must be non-null after successful completion of the implementation of this method.

Throws:

IncomingFileTransferException

sendRetrieveRequest

public void sendRetrieveRequest(IFileID remoteFileID1,
                                IFileTransferListener transferListener,
                                java.util.Map options1)
                         throws IncomingFileTransferException

Description copied from interface: IRetrieveFileTransferContainerAdapter

Send request for transfer of a remote file to local file storage. This method is used to initiate a file retrieve for a remoteFileID (first parameter). File transfer events are asynchronously delivered a file transfer listener (second parameter). The given remoteFileID and transferListener must not be null.

Specified by:

sendRetrieveRequest in interface IRetrieveFileTransferContainerAdapter

Parameters:

remoteFileID1 - reference to the remote target file (e.g. http://www.eclipse.org/index.html) or a reference to a resource that specifies the location of a target file. Implementing providers will determine what protocol schemes are supported (e.g. ftp, http, torrent, file, etc) and the required format of the scheme-specific information. If a protocol is specified that is not supported, or the scheme-specific information is not well-formed, then an IncomingFileTransferException will be thrown. Typically, callers will create IFileID instances via calls such as:

 IFileID remoteFileID = FileIDFactory.getDefault().createID(
                ftc.getRetrieveNamespace(), "http://www.composent.com/index.html");
 

Must not be null.

transferListener - a listener for file transfer events. Must not be null

options1 - a Map of options associated with sendRetrieveRequest. The particular name/value pairs will be unique to the individual providers. May be null.

Throws:

IncomingFileTransferException - if the provider is not connected or is not in the correct state for initiating file transfer

getRetrieveNamespace

public Namespace getRetrieveNamespace()

Description copied from interface: IRetrieveFileTransferContainerAdapter

Get namespace to be used for creation of remoteFileID for retrieve request. Result typically used as first parameter for IDFactory.createID(Namespace, String) to be used as first in IRetrieveFileTransferContainerAdapter.sendRetrieveRequest(IFileID, IFileTransferListener, Map)

Specified by:

getRetrieveNamespace in interface IRetrieveFileTransferContainerAdapter

Returns:

Namespace to use for ID creation via IDFactory.createID(Namespace, String). Will not be null.

isPaused

public boolean isPaused()

Specified by:

isPaused in interface IFileTransferPausable

Returns:

true if file transfer paused, false if not paused

doPause

protected abstract boolean doPause()

Subclass overridable version of pause(). Subclasses must provide an implementation of this method to support IFileTransferPausable.

Returns:

true if the pause is successful. false otherwise.

pause

public boolean pause()

Description copied from interface: IFileTransferPausable

Pause file transfer. Returns true if the associated IFileTransfer is successfully paused. Returns false if the implementing file transfer cannot be paused, or transfer has already completed.

Specified by:

pause in interface IFileTransferPausable

Returns:

true if file transfer successfully paused. False if cannot be paused, or the transfer has already completed

doResume

protected abstract boolean doResume()

Subclass overridable version of resume(). Subclasses must provide an implementation of this method to support IFileTransferPausable.

Returns:

true if the resume is successful. false otherwise.

resume

public boolean resume()

Description copied from interface: IFileTransferPausable

Resume file transfer after having been paused. If successfully resumed, then returns true. If the associated IFileShare is not already paused, or has already completed then this method returns false.

Specified by:

resume in interface IFileTransferPausable

getListener

public IFileTransferListener getListener()

Description copied from interface: IIncomingFileTransfer

Get listener assigned to this incoming file transfer. May be null if no listener has been provided.

Specified by:

getListener in interface IIncomingFileTransfer

Returns:

listener the IFileTransferListener provided for this incoming file transfer.

createRangeName

protected java.lang.String createRangeName()

createJobName

protected java.lang.String createJobName()

setupAndScheduleJob

protected void setupAndScheduleJob(FileTransferJob fileTransferJob)

fireReceiveStartEvent

protected void fireReceiveStartEvent()

fireReceiveResumedEvent

protected void fireReceiveResumedEvent()

getFileRangeSpecification

public IFileRangeSpecification getFileRangeSpecification()

Description copied from interface: IIncomingFileTransfer

Get file range specification for this incoming file transfer instance. Will return null if the retrieval is of the entire file.

Specified by:

getFileRangeSpecification in interface IIncomingFileTransfer

Returns:

file range specification for this incoming file transfer instance. Returns null if the retrieval is of the entire file.

sendRetrieveRequest

public void sendRetrieveRequest(IFileID rFileID,
                                IFileRangeSpecification rangeSpec,
                                IFileTransferListener transferListener,
                                java.util.Map ops)
                         throws IncomingFileTransferException

Description copied from interface: IRetrieveFileTransferContainerAdapter

Send request for transfer of a remote file to local file storage. This method is used to initiate a file retrieve for a remoteFileID (first parameter). File transfer events are asynchronously delivered a file transfer listener (third parameter). The given remoteFileID and transferListener must not be null.

Specified by:

sendRetrieveRequest in interface IRetrieveFileTransferContainerAdapter

Parameters:

rFileID - reference to the remote target file (e.g. http://www.eclipse.org/index.html) or a reference to a resource that specifies the location of a target file. Implementing providers will determine what protocol schemes are supported (e.g. ftp, http, torrent, file, etc) and the required format of the scheme-specific information. If a protocol is specified that is not supported, or the scheme-specific information is not well-formed, then an IncomingFileTransferException will be thrown. Typically, callers will create IFileID instances via calls such as:

 IFileID remoteFileID = FileIDFactory.getDefault().createID(
                ftc.getRetrieveNamespace(), "http://www.composent.com/index.html");
 

Must not be null.

rangeSpec - a range specification for retrieving a portion of the given remote file. If null the entire file will be retrieved (as per IRetrieveFileTransferContainerAdapter.sendRetrieveRequest(IFileID, IFileTransferListener, Map). If non-null the given file range will be used to retrieve the given file. For example, if the rangeSpecification has a start value of 1 and end value of 3, and the total length of the file is 5 bytes with content [a, b, c, d, e], a successful retrieve request would transfer bytes 'b', 'c', and 'd', but not 'a', and 'e'.

transferListener - a listener for file transfer events. Must not be null

ops - a Map of options associated with sendRetrieveRequest. The particular name/value pairs will be unique to the individual providers. May be null.

Throws:

IncomingFileTransferException - if the provider is not connected or is not in the correct state for initiating file transfer

setupProxy

protected abstract void setupProxy(Proxy proxy)

Setup ECF proxy. Subclasses must override this method to do appropriate proxy setup. This method will be called from within sendRetrieveRequest(IFileID, IFileTransferListener, Map) and sendRetrieveRequest(IFileID, IFileRangeSpecification, IFileTransferListener, Map), prior to the actual call to openStreams().

Parameters:

proxy - the proxy to be setup. Will not be null.

selectProxyFromProxies

protected org.eclipse.core.net.proxy.IProxyData selectProxyFromProxies(java.lang.String protocol,
                                                                       org.eclipse.core.net.proxy.IProxyData[] proxies)

Select a single proxy from a set of proxies available for the given host. This implementation selects in the following manner: 1) If proxies provided is null or array of 0 length, null is returned. If only one proxy is available (array of length 1) then the entry is returned. If proxies provided is length > 1, then if the type of a proxy in the array matches the given protocol (e.g. http, https), then the first matching proxy is returned. If the protocol does not match any of the proxies, then the *first* proxy (i.e. proxies[0]) is returned. Subclasses may override if desired.

Parameters:

protocol - the target protocol (e.g. http, https, scp, etc). Will not be null.

proxies - the proxies to select from. May be null or array of length 0.

Returns:

proxy data selected from the proxies provided.

setupProxies

protected void setupProxies()

getRemoteFileName

public java.lang.String getRemoteFileName()

Description copied from interface: IIncomingFileTransfer

Obtains the name of the remote file if possible. The name will typically but not necessarily be the same as the leaf part of the path to the remote file.

Specified by:

getRemoteFileName in interface IIncomingFileTransfer

Returns:

The name of the remote file or null if no such name can be determined.