add waitForLoad() method to loadable services

core/src/main/groovy/com/muwire/core/Service.groovy

@@ -0,0 +1,13 @@
+package com.muwire.core
+
+abstract class Service {
+
+	volatile boolean loaded
+	
+	abstract void load()
+	
+	void waitForLoad() {
+		while (!loaded)
+			Thread.sleep(10)
+	}
+}

core/src/main/groovy/com/muwire/core/files/PersisterService.groovy

@@ -5,6 +5,7 @@ import java.util.stream.Collectors
 import com.muwire.core.DownloadedFile
 import com.muwire.core.EventBus
 import com.muwire.core.InfoHash
+import com.muwire.core.Service
 import com.muwire.core.SharedFile
 
 import groovy.json.JsonOutput
@@ -12,7 +13,7 @@ import groovy.json.JsonSlurper
 import net.i2p.data.Base32
 import net.i2p.data.Destination
 
-class PersisterService {
+class PersisterService extends Service {
 
 	final File location
 	final EventBus listener
@@ -36,7 +37,7 @@ class PersisterService {
 		timer.cancel()
 	}
 	
-	private void load() {
+	void load() {
 		if (location.exists() && location.isFile()) {
 			def slurper = new JsonSlurper()
 			try {
@@ -53,6 +54,7 @@ class PersisterService {
 			}
 		}
 		timer.schedule({persistFiles()} as TimerTask, 0, interval)
+		loaded = true
 	}
 	
 	private static FileLoadedEvent fromJson(def json) {

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

@@ -3,6 +3,7 @@ package com.muwire.core.hostcache
 import java.util.concurrent.ConcurrentHashMap
 
 import com.muwire.core.MuWireSettings
+import com.muwire.core.Service
 import com.muwire.core.connection.ConnectionAttemptStatus
 import com.muwire.core.connection.ConnectionEvent
 import com.muwire.core.trust.TrustLevel
@@ -12,7 +13,7 @@ import groovy.json.JsonOutput
 import groovy.json.JsonSlurper
 import net.i2p.data.Destination
 
-class HostCache {
+class HostCache extends Service {
 
 	final TrustService trustService
 	final File storage
@@ -73,7 +74,7 @@ class HostCache {
 		rv[0..n-1]
 	}
 	
-	private void load() {
+	void load() {
 		if (storage.exists()) {
 			JsonSlurper slurper = new JsonSlurper()
 			storage.eachLine {
@@ -86,6 +87,7 @@ class HostCache {
 			}
 		}
 		timer.schedule({save()} as TimerTask, interval, interval)
+		loaded = true
 	}
 	
 	private boolean allowHost(Host host) {

core/src/main/groovy/com/muwire/core/trust/TrustService.groovy

@@ -1,9 +1,11 @@
 package com.muwire.core.trust
 
+import com.muwire.core.Service
+
 import net.i2p.data.Destination
 import net.i2p.util.ConcurrentHashSet
 
-class TrustService {
+class TrustService extends Service {
 
 	final File persistGood, persistBad
 	final long persistInterval
@@ -30,7 +32,7 @@ class TrustService {
 		timer.cancel()
 	}
 	
-	private void load() {
+	void load() {
 		if (persistGood.exists()) {
 			persistGood.eachLine {
 				good.add(new Destination(it))
@@ -42,6 +44,7 @@ class TrustService {
 			}
 		}
 		timer.schedule({persist()} as TimerTask, persistInterval, persistInterval)
+		loaded = true
 	}
 	
 	private void persist() {