com.qcloud.cos.event

Class ProgressListener.ExceptionReporter

java.lang.Object

com.qcloud.cos.event.ProgressListener.ExceptionReporter

All Implemented Interfaces:

DeliveryMode, ProgressListener

Enclosing interface:

ProgressListener

public static class ProgressListener.ExceptionReporter
extends Object
implements ProgressListener, DeliveryMode

A utility class for capturing and reporting the first exception thrown by a given progress listener. Note once an exception is thrown by the underlying listener, all subsequent events will no longer be notified to the listener.

Nested Class Summary

Nested classes/interfaces inherited from interface com.qcloud.cos.event.ProgressListener

ProgressListener.ExceptionReporter

Nested classes/interfaces inherited from interface com.qcloud.cos.event.DeliveryMode

DeliveryMode.Check

Field Summary

Fields inherited from interface com.qcloud.cos.event.ProgressListener

NOOP

Constructor Summary

Constructors

Constructor and Description
ExceptionReporter(ProgressListener listener)

Method Summary

Modifier and Type	Method and Description
Throwable	getCause() Returns the underlying exception, if any; or null otherwise.
boolean	isSyncCallSafe() Returns true if it is safe to make a synchronous callback to the implementing listener without the risk of incurring undue latency; false otherwise.
void	progressChanged(ProgressEvent progressEvent) Delivers the progress event to the underlying listener but only if there has not been an exception previously thrown by the listener.
void	throwExceptionIfAny() Throws the underlying exception, if any, as an CosClientException; or do nothing otherwise.
static ProgressListener.ExceptionReporter	wrap(ProgressListener listener) Returns a wrapper for the given listener to capture the first exception thrown.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExceptionReporter

public ExceptionReporter(ProgressListener listener)

Method Detail

progressChanged

public void progressChanged(ProgressEvent progressEvent)

Delivers the progress event to the underlying listener but only if there has not been an exception previously thrown by the listener.

Called when progress has changed, such as additional bytes transferred, transfer failed, etc. The execution of the callback of this listener is managed by SDKProgressPublisher. Implementation of this interface should never block.

If the implementation follows the best practice and doesn't block, it should then extends from SyncProgressListener.

Note any exception thrown by the listener will get ignored. Should there be need to capture any such exception, you may consider wrapping the listener with wrap(ProgressListener).

Specified by:

progressChanged in interface ProgressListener

Parameters:

progressEvent - The event describing the progress change.

See Also:

SDKProgressPublisher, ProgressListener.ExceptionReporter

throwExceptionIfAny

public void throwExceptionIfAny()

Throws the underlying exception, if any, as an CosClientException; or do nothing otherwise.

getCause

public Throwable getCause()

Returns the underlying exception, if any; or null otherwise.

wrap

public static ProgressListener.ExceptionReporter wrap(ProgressListener listener)

Returns a wrapper for the given listener to capture the first exception thrown.

isSyncCallSafe

public boolean isSyncCallSafe()

Description copied from interface: DeliveryMode

Returns true if it is safe to make a synchronous callback to the implementing listener without the risk of incurring undue latency; false otherwise.

Specified by:

isSyncCallSafe in interface DeliveryMode