Package org.drasyl.remote.handler

Class HopCountGuard

java.lang.Object

org.drasyl.pipeline.skeleton.HandlerAdapter

org.drasyl.pipeline.skeleton.AddressHandlerAdapter<A>

org.drasyl.pipeline.skeleton.SimpleOutboundHandler<AddressedIntermediateEnvelope<com.google.protobuf.MessageLite>,Address>

org.drasyl.remote.handler.HopCountGuard

All Implemented Interfaces:

Handler

public final class HopCountGuard
extends SimpleOutboundHandler<AddressedIntermediateEnvelope<com.google.protobuf.MessageLite>,Address>

This handler ensures that IntermediateEnvelopes do not infinitely circulate in the network. It increments the hop counter of each outgoing message. If the limit of hops is reached, the message is discarded. Otherwise the message can pass.

Field Summary

Fields

Modifier and Type	Field	Description
static String	HOP_COUNT_GUARD
static HopCountGuard	INSTANCE

Method Summary

Modifier and Type	Method	Description
protected void	matchedWrite(HandlerContext ctx, Address recipient, AddressedIntermediateEnvelope<com.google.protobuf.MessageLite> msg, CompletableFuture<Void> future)	Is called for each message of type SimpleOutboundHandler.

Methods inherited from class org.drasyl.pipeline.skeleton.SimpleOutboundHandler

acceptOutbound, write

Methods inherited from class org.drasyl.pipeline.skeleton.AddressHandlerAdapter

acceptAddress

Methods inherited from class org.drasyl.pipeline.skeleton.HandlerAdapter

eventTriggered, exceptionCaught, handlerAdded, handlerRemoved, read

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final HopCountGuard INSTANCE

HOP_COUNT_GUARD

public static final String HOP_COUNT_GUARD

See Also:

Constant Field Values

Method Detail

matchedWrite

protected void matchedWrite(HandlerContext ctx,
                            Address recipient,
                            AddressedIntermediateEnvelope<com.google.protobuf.MessageLite> msg,
                            CompletableFuture<Void> future)

Description copied from class: SimpleOutboundHandler

Is called for each message of type SimpleOutboundHandler.

Specified by:

matchedWrite in class SimpleOutboundHandler<AddressedIntermediateEnvelope<com.google.protobuf.MessageLite>,Address>

Parameters:

ctx - handler context

recipient - the recipient of the message

msg - the message

future - a future for the message