org.eclipse.californium.core.network.deduplication

Interface Deduplicator

All Known Implementing Classes:

CropRotation, NoDeduplicator, SweepDeduplicator

public interface Deduplicator

The deduplicator has to detect duplicates. Notice that CONs and NONs can be duplicates.

Method Summary

Modifier and Type	Method and Description
void	clear() Clears the state of this deduplicator.
Exchange	find(Exchange.KeyMID key)
Exchange	findPrevious(Exchange.KeyMID key, Exchange exchange) Checks if the specified key is already associated with a previous exchange and otherwise associates the key with the exchange specified.
void	setExecutor(java.util.concurrent.ScheduledExecutorService executor) Set the specified executor.
void	start() Starts the deduplicator
void	stop() Stops the deduplicator.

Method Detail

start

void start()

Starts the deduplicator

stop

void stop()

Stops the deduplicator. The deduplicator should NOT clear its state.

setExecutor

void setExecutor(java.util.concurrent.ScheduledExecutorService executor)

Set the specified executor. This method might call stop(), replace the executor and then start() again.

Parameters:

executor - the executor

findPrevious

Exchange findPrevious(Exchange.KeyMID key,
                      Exchange exchange)

Checks if the specified key is already associated with a previous exchange and otherwise associates the key with the exchange specified. This method can also be though of as 'put if absent'. This is equivalent to

   if (!duplicator.containsKey(key))
       return duplicator.put(key, value);
   else
       return duplicator.get(key);
 

except that the action is performed atomically.

Parameters:

key - the key

exchange - the exchange

Returns:

the previous exchange associated with the specified key, or null if there was no mapping for the key.

find

Exchange find(Exchange.KeyMID key)

clear

void clear()

Clears the state of this deduplicator.