diff options
Diffstat (limited to 'same/src/main')
3 files changed, 79 insertions, 0 deletions
diff --git a/same/src/main/java/com/orbekk/same/discovery/DirectoryService.java b/same/src/main/java/com/orbekk/same/discovery/DirectoryService.java new file mode 100644 index 0000000..fae2bf6 --- /dev/null +++ b/same/src/main/java/com/orbekk/same/discovery/DirectoryService.java @@ -0,0 +1,22 @@ +package com.orbekk.same.discovery; + +import java.util.List; + +/** + * Maintains a registry of available networks. + * + * The discovery service is only meant to be used for debugging. + */ +public interface DirectoryService { + /** + * Returns a list of network names and master urls interleaved, i.e., + * + * [NetworkName1, MasterUrl1, ...] + */ + List<String> getNetworks() throws Exception; + + /** + * Register a network. + */ + void registerNetwork(String networkName, String masterUrl) throws Exception; +} diff --git a/same/src/main/java/com/orbekk/same/discovery/DiscoveryListener.java b/same/src/main/java/com/orbekk/same/discovery/DiscoveryListener.java new file mode 100644 index 0000000..e006c77 --- /dev/null +++ b/same/src/main/java/com/orbekk/same/discovery/DiscoveryListener.java @@ -0,0 +1,5 @@ +package com.orbekk.same.discovery; + +public interface DiscoveryListener { + void discover(String url); +} diff --git a/same/src/main/java/com/orbekk/same/discovery/DiscoveryService.java b/same/src/main/java/com/orbekk/same/discovery/DiscoveryService.java new file mode 100644 index 0000000..a1147cc --- /dev/null +++ b/same/src/main/java/com/orbekk/same/discovery/DiscoveryService.java @@ -0,0 +1,52 @@ +package com.orbekk.same.discovery; + +import java.net.DatagramPacket; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import com.orbekk.net.BroadcastListener; + +public class DiscoveryService extends Thread { + private Logger logger = LoggerFactory.getLogger(getClass()); + BroadcastListener broadcastListener; + DiscoveryListener listener; + + public DiscoveryService(DiscoveryListener listener, + BroadcastListener broadcastListener) { + this.listener = listener; + this.broadcastListener = broadcastListener; + } + + @Override + public void run() { + logger.info("DiscoveryService starting."); + while (!Thread.interrupted()) { + DatagramPacket packet = broadcastListener.listen(); + if (packet == null) { + // An error or interrupt occurred. + continue; + } + String content = new String(packet.getData(), 0, packet.getLength()); + String[] words = content.split(" "); + + if (!content.startsWith("Discover") || words.length < 2) { + logger.warn("Invalid discovery message: {}", content); + continue; + } + + String url = words[1]; + logger.info("Received discovery from {}", url); + if (listener != null) { + listener.discover(url); + } + } + logger.info("DiscoveryService stopped."); + } + + @Override public void interrupt() { + logger.info("Interrupt()"); + super.interrupt(); + broadcastListener.interrupt(); + } +} |