Pinger utility

host-cache/src/main/groovy/com/muwire/hostcache/Pinger.groovy

@@ -0,0 +1,25 @@
+package com.muwire.hostcache
+
+import groovy.json.JsonOutput
+import net.i2p.client.I2PSession
+import net.i2p.client.datagram.I2PDatagramMaker
+
+class Pinger {
+    
+    final def session
+    final def maker
+    Pinger(session) {
+        this.session = session
+        this.maker = new I2PDatagramMaker(session)
+    }
+    
+    def ping(host, uuid) {
+        def payload = new HashMap()
+        payload.type = "CrawlerPing"
+        payload.version = 1
+        payload.uuid = uuid
+        payload = JsonOutput.toJson(payload)
+        payload = maker.makeI2PDatagram(payload.bytes)
+        session.sendMessage(host.destination, payload, I2PSession.PROTO_DATAGRAM, 0, 0)
+    }
+}