skeleton of host cache querying functionality

core/src/main/groovy/com/muwire/core/connection/ConnectionEvent.groovy

@@ -0,0 +1,12 @@
+package com.muwire.core.connection
+
+import com.muwire.core.Event
+
+import net.i2p.data.Destination
+
+class ConnectionEvent extends Event {
+
+	Destination destination
+	ConnectionAttemptStatus status
+
+}

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

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+package com.muwire.core.hostcache
+
+import net.i2p.data.Destination
+
+class CacheServers {
+
+	private static final int TO_GIVE = 3
+	private static List<Destination> CACHES = [
+			new Destination("KvwWPKMSAtzf7Yruj8TQaHi2jaQpSNsXJskbpmSBTxkcYlDB2GllH~QBu-cs4FSYdaRmKDUUx7793jjnYJgTMbrjqeIL5-BTORZ09n6PUfhSejDpJjdkUxaV1OHRatfYs70RNBv7rvdj1-nXUow5tMfOJtoWVocUoKefUGFQFbJLDDkBqjm1kFyKFZv6m6S6YqXxBgVB1qYicooy67cNQF5HLUFtP15pk5fMDNGz5eNCjPfC~2Gp8FF~OpSy92HT0XN7uAMJykPcbdnWfcvVwqD7eS0K4XEnsqnMPLEiMAhqsugEFiFqtB3Wmm7UHVc03lcAfRhr1e2uZBNFTtM2Uol4MD5sCCKRZVHGcH-WGPSEz0BM5YO~Xi~dQ~N3NVud32PVzhh8xoGcAlhTqMqAbRJndCv-H6NflX90pYmbirCTIDOaR9758mThrqX0d4CwCn4jFXer52l8Qe8CErGoLuB-4LL~Gwrn7R1k7ZQc2PthkqeW8MfigyiN7hZVkul9AAAA")
+		]
+
+	static List<Destination> getCacheServers() {
+		List<Destination> allCaches = new ArrayList<>(CACHES)
+		Collections.shuffle(allCaches)
+		if (allCaches.size() <= TO_GIVE)
+			return allCaches
+		allCaches[0..TO_GIVE-1]
+	}
+}

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

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+package com.muwire.core.hostcache
+
+import net.i2p.data.Destination
+
+class Host {
+
+	private static final int MAX_FAILURES = 3
+	
+	final Destination destination
+	int failures
+	
+	public Host(Destination destination) {
+		this.destination = destination
+	}
+
+	synchronized void onConnect() {
+		failures = 0
+	}
+	
+	synchronized void onFailure() {
+		failures++
+	}
+	
+	synchronized boolean isFailed() {
+		failures >= MAX_FAILURES
+	}
+}

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

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+package com.muwire.core.hostcache
+
+import com.muwire.core.trust.TrustService
+
+class HostCache {
+
+	final TrustService trustService
+	public HostCache(TrustService trustService) {
+		this.trustService = trustService
+	}
+
+}

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

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+package com.muwire.core.hostcache
+
+import com.muwire.core.Event
+
+import net.i2p.data.Destination
+
+class HostDiscoveredEvent extends Event {
+
+	Destination destination
+}

core/src/main/java/com/muwire/core/connection/ConnectionAttemptStatus.java

@@ -0,0 +1,5 @@
+package com.muwire.core.connection;
+
+public enum ConnectionAttemptStatus {
+	SUCCESSFUL, REJECTED, FAILED
+}