Package org.drasyl.localhost

Class LocalHostDiscovery

java.lang.Object

org.drasyl.pipeline.skeleton.HandlerAdapter

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

org.drasyl.pipeline.skeleton.SimpleOutboundHandler<SerializedApplicationMessage,CompressedPublicKey>

org.drasyl.localhost.LocalHostDiscovery

All Implemented Interfaces:

Handler

public class LocalHostDiscovery
extends SimpleOutboundHandler<SerializedApplicationMessage,CompressedPublicKey>

Uses the file system to discover other drasyl nodes running on the local computer.

To do this, all nodes regularly write their UdpServer address(es) to the file system. At the same time the file system is monitored to detect other nodes. If the file system does not support monitoring (WatchService), a fallback to polling is used.

Inspired by: Jadex

Field Summary

Fields

Modifier and Type	Field	Description
static String	FILE_SUFFIX
static String	LOCAL_HOST_DISCOVERY
static Duration	REFRESH_INTERVAL_SAFETY_MARGIN
static Duration	WATCH_SERVICE_POLL_INTERVAL

Constructor Summary

Constructors

Constructor	Description
LocalHostDiscovery()

Method Summary

Modifier and Type	Method	Description
void	eventTriggered(HandlerContext ctx, Event event, CompletableFuture<Void> future)	Gets called if a Event was emitted.
protected void	matchedWrite(HandlerContext ctx, CompressedPublicKey recipient, SerializedApplicationMessage 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

exceptionCaught, handlerAdded, handlerRemoved, read

Methods inherited from class java.lang.Object

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

Field Detail

LOCAL_HOST_DISCOVERY

public static final String LOCAL_HOST_DISCOVERY

See Also:

Constant Field Values

REFRESH_INTERVAL_SAFETY_MARGIN

public static final Duration REFRESH_INTERVAL_SAFETY_MARGIN

WATCH_SERVICE_POLL_INTERVAL

public static final Duration WATCH_SERVICE_POLL_INTERVAL

FILE_SUFFIX

public static final String FILE_SUFFIX

See Also:

Constant Field Values

Constructor Detail

LocalHostDiscovery

public LocalHostDiscovery()

Method Detail

eventTriggered

public void eventTriggered(HandlerContext ctx,
                           Event event,
                           CompletableFuture<Void> future)

Description copied from interface: Handler

Gets called if a Event was emitted.

Specified by:

eventTriggered in interface Handler

Overrides:

eventTriggered in class HandlerAdapter

Parameters:

ctx - handler context

event - the event

future - a future for the message

matchedWrite

protected void matchedWrite(HandlerContext ctx,
                            CompressedPublicKey recipient,
                            SerializedApplicationMessage msg,
                            CompletableFuture<Void> future)

Description copied from class: SimpleOutboundHandler

Is called for each message of type SimpleOutboundHandler.

Specified by:

matchedWrite in class SimpleOutboundHandler<SerializedApplicationMessage,CompressedPublicKey>

Parameters:

ctx - handler context

recipient - the recipient of the message

msg - the message

future - a future for the message