work on cache client

core/src/main/groovy/com/muwire/core/hostcache/CacheClient.groovy

@@ -4,8 +4,14 @@ import com.muwire.core.EventBus
 import com.muwire.core.MuWireSettings
 import com.muwire.core.connection.ConnectionManager
 
+import groovy.json.JsonOutput
+import groovy.util.logging.Log
 import net.i2p.client.I2PSession
+import net.i2p.client.I2PSessionMuxedListener
+import net.i2p.client.SendMessageOptions
+import net.i2p.client.datagram.I2PDatagramMaker
 
+@Log
 class CacheClient {
 	
 	final EventBus eventBus
@@ -41,6 +47,45 @@ class CacheClient {
 		if (!cache.getHosts(1).isEmpty())
 			return
 		
+		log.info "Will query hostcaches"	
+		
+		def ping = [type: "Ping", version: 1, leaf: settings.isLeaf()]
+		ping = JsonOutput.toJson(ping)
+		def maker = new I2PDatagramMaker(session)
+		ping = maker.makeI2PDatagram(ping.bytes)
+		def options = new SendMessageOptions()
+		options.setSendLeaseSet(true)
+		CacheServers.getCacheServers().each {
+			log.info "Querying hostcache ${it.toBase32()}"
+			session.sendMessage(it, ping, 0, ping.length, I2PSession.PROTO_DATAGRAM, 0, 0, options)
+		}
+	}
+	
+	class Listener implements I2PSessionMuxedListener {
+
+		@Override
+		public void messageAvailable(I2PSession session, int msgId, long size) {
+		}
+
+		@Override
+		public void messageAvailable(I2PSession session, int msgId, long size, int proto, int fromport, int toport) {
+			// TODO Auto-generated method stub
+			
+		}
+
+		@Override
+		public void reportAbuse(I2PSession session, int severity) {
+		}
+
+		@Override
+		public void disconnected(I2PSession session) {
+			log.severe "I2P session disconnected"
+		}
+
+		@Override
+		public void errorOccurred(I2PSession session, String message, Throwable error) {
+			log.severe "I2P error occured $message $error"
+		}
 		
 	}