Package io.tus.java.client

Class TusExecutor

java.lang.Object

io.tus.java.client.TusExecutor

public abstract class TusExecutor
extends Object

TusExecutor is a wrapper class which you can build around your uploading mechanism and any exception thrown by it will be caught and may result in a retry. This way you can easily add retrying functionality to your application with defined delays between them. This can be achieved by extending TusExecutor and implementing the abstract makeAttempt() method:

 
  TusExecutor executor = new TusExecutor() {
      {@literal @}Override
      protected void makeAttempt() throws ProtocolException, IOException {
          TusUploader uploader = client.resumeOrCreateUpload(upload);
          while(uploader.uploadChunk() > -1) {}
          uploader.finish();
      }
  };
  executor.makeAttempts();
 
 

The retries are basically just calling the makeAttempt() method which should then retrieve an TusUploader using TusClient.resumeOrCreateUpload(TusUpload) and then invoke TusUploader.uploadChunk() as long as possible without catching ProtocolExceptions or IOExceptions as this is taken over by this class. The current attempt can be interrupted using Thread.interrupt() which will cause the makeAttempts() method to return false immediately.

Constructor Summary

Constructors

Constructor	Description
TusExecutor()

Method Summary

Modifier and Type	Method	Description
int[]	getDelays()	Get the delays which will be used for waiting before attempting retries.
protected abstract void	makeAttempt()	This method must be implemented by the specific caller.
boolean	makeAttempts()	This method is basically just calling the makeAttempt() method which should then retrieve an TusUploader using TusClient.resumeOrCreateUpload(TusUpload) and then invoke TusUploader.uploadChunk() as long as possible without catching ProtocolExceptions or IOExceptions as this is taken over by this class.
void	setDelays(int[] delays)	Set the delays at which TusExecutor will issue a retry if makeAttempt() throws an exception.

Methods inherited from class java.lang.Object

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

Constructor Details

TusExecutor

public TusExecutor()

Method Details

setDelays

public void setDelays(int[] delays)

Set the delays at which TusExecutor will issue a retry if makeAttempt() throws an exception. If the methods call fails for the first time it will wait delays[0]ms before calling it again. If this second calls also does not return normally delays[1]ms will be waited on so on. It total delays.length retries may be issued, resulting in up to delays.length + 1 calls to makeAttempt(). The default delays are set to 500ms, 1s, 2s and 3s.

Parameters:

delays - The desired delay values to be used

See Also:

• getDelays()

getDelays

public int[] getDelays()

Get the delays which will be used for waiting before attempting retries.

Returns:

The dalys previously set

See Also:

• setDelays(int[])

makeAttempts

public boolean makeAttempts()
                     throws ProtocolException,
IOException

This method is basically just calling the makeAttempt() method which should then retrieve an TusUploader using TusClient.resumeOrCreateUpload(TusUpload) and then invoke TusUploader.uploadChunk() as long as possible without catching ProtocolExceptions or IOExceptions as this is taken over by this class. The current attempt can be interrupted using Thread.interrupt() which will cause the method to return false immediately.

Returns:

true if the makeAttempt() method returned normally and false if the thread was interrupted while sleeping until the next attempt.

Throws:

ProtocolException

IOException

makeAttempt

protected abstract void makeAttempt()
                             throws ProtocolException,
IOException

This method must be implemented by the specific caller. It will be invoked once or multiple times by the makeAttempts() method. A proper implementation should retrieve an TusUploader using TusClient.resumeOrCreateUpload(TusUpload) and then invoke TusUploader.uploadChunk() as long as possible without catching ProtocolExceptions or IOExceptions as this is taken over by this class.

Throws:

ProtocolException

IOException