org.gcube.data.streams.handlers
Class CountingHandler

java.lang.Object
  org.gcube.data.streams.handlers.CountingHandler

All Implemented Interfaces:

FaultHandler

public abstract class CountingHandler
extends Object
implements FaultHandler

A partial implementation for FaultHandler that count failures and keep track of the last observed failure.

Author:

Fabio Simeoni

Constructor Summary

CountingHandler()

Method Summary

FaultResponse	handle(RuntimeException failure) Indicates whether iteration should continue or stop the iteration on the occurrence of an iteration failure.
protected abstract FaultResponse	handle(RuntimeException failure, Exception lastFailure, int failureCount) Indicates whether iteration should continue or stop the iteration on the occurrence of an iteration failure.

Methods inherited from class java.lang.Object

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

Constructor Detail

CountingHandler

public CountingHandler()

Method Detail

handle

public final FaultResponse handle(RuntimeException failure)

Description copied from interface: FaultHandler

Indicates whether iteration should continue or stop the iteration on the occurrence of an iteration failure.

Specified by:

handle in interface FaultHandler

Parameters:

failure - the failure

Returns:

the FaultResponse

handle

protected abstract FaultResponse handle(RuntimeException failure,
                                        Exception lastFailure,
                                        int failureCount)
                                 throws StreamContingencyException,
                                        RuntimeException

Indicates whether iteration should continue or stop the iteration on the occurrence of an iteration failure.

Parameters:

failure - the failure

lastFailure - the failure observed previously, or null if this is the first observed failure

failureCount - the number of failures counted so far, 0 if this is the first observed failure

Returns:

true if iteration should continue, false if it should stop

Throws:

StreamContingencyException - if no element can be yielded, because the input element violates pre-conditions

RuntimeException - if no element can be yielded from the input element, because of an unrecoverable condition