Fixes, improved tests and other improvements

core/src/main/java/ch/dissem/bitmessage/entity/valueobject/NetworkAddress.java

@@ -41,19 +41,19 @@ public class NetworkAddress implements Streamable {
     /**
      * Stream number for this node
      */
-    private long stream;
+    private final long stream;
 
     /**
      * same service(s) listed in version
      */
-    private long services;
+    private final long services;
 
     /**
      * IPv6 address. IPv4 addresses are written into the message as a 16 byte IPv4-mapped IPv6 address
      * (12 bytes 00 00 00 00 00 00 00 00 00 00 FF FF, followed by the 4 bytes of the IPv4 address).
      */
-    private byte[] ipv6;
+    private final byte[] ipv6;
-    private int port;
+    private final int port;
 
     private NetworkAddress(Builder builder) {
         time = builder.time;

core/src/main/java/ch/dissem/bitmessage/factory/BufferPool.java

@@ -16,12 +16,16 @@
 
 package ch.dissem.bitmessage.factory;
 
-import ch.dissem.bitmessage.ports.NetworkHandler;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.nio.ByteBuffer;
-import java.util.*;
+import java.util.Map;
+import java.util.Stack;
+import java.util.TreeMap;
+
+import static ch.dissem.bitmessage.ports.NetworkHandler.HEADER_SIZE;
+import static ch.dissem.bitmessage.ports.NetworkHandler.MAX_PAYLOAD_SIZE;
 
 /**
  * A pool for {@link ByteBuffer}s. As they may use up a lot of memory,
@@ -30,78 +34,58 @@ import java.util.*;
 class BufferPool {
     private static final Logger LOG = LoggerFactory.getLogger(BufferPool.class);
 
-    public static final BufferPool bufferPool = new BufferPool(256, 2048);
+    public static final BufferPool bufferPool = new BufferPool();
 
-    private final Map<Size, Integer> capacities = new EnumMap<>(Size.class);
+    private final Map<Integer, Stack<ByteBuffer>> pools = new TreeMap<>();
-    private final Map<Size, Stack<ByteBuffer>> pools = new EnumMap<>(Size.class);
 
-    private BufferPool(int small, int medium) {
+    private BufferPool() {
-        capacities.put(Size.HEADER, 24);
+        pools.put(HEADER_SIZE, new Stack<ByteBuffer>());
-        capacities.put(Size.SMALL, small);
+        pools.put(54, new Stack<ByteBuffer>());
-        capacities.put(Size.MEDIUM, medium);
+        pools.put(1000, new Stack<ByteBuffer>());
-        capacities.put(Size.LARGE, NetworkHandler.MAX_PAYLOAD_SIZE);
+        pools.put(60000, new Stack<ByteBuffer>());
-        pools.put(Size.HEADER, new Stack<ByteBuffer>());
+        pools.put(MAX_PAYLOAD_SIZE, new Stack<ByteBuffer>());
-        pools.put(Size.SMALL, new Stack<ByteBuffer>());
-        pools.put(Size.MEDIUM, new Stack<ByteBuffer>());
-        pools.put(Size.LARGE, new Stack<ByteBuffer>());
     }
 
     public synchronized ByteBuffer allocate(int capacity) {
-        Size targetSize = getTargetSize(capacity);
+        for (Map.Entry<Integer, Stack<ByteBuffer>> e : pools.entrySet()) {
-        Size s = targetSize;
+            if (e.getKey() >= capacity && !e.getValue().isEmpty()) {
-        do {
+                return e.getValue().pop();
-            Stack<ByteBuffer> pool = pools.get(s);
-            if (!pool.isEmpty()) {
-                return pool.pop();
             }
-            s = s.next();
+        }
-        } while (s != null);
+        Integer targetSize = getTargetSize(capacity);
         LOG.debug("Creating new buffer of size " + targetSize);
-        return ByteBuffer.allocate(capacities.get(targetSize));
+        return ByteBuffer.allocate(targetSize);
     }
 
-    public synchronized ByteBuffer allocate() {
+    /**
-        Stack<ByteBuffer> pool = pools.get(Size.HEADER);
+     * Returns a buffer that has the size of the Bitmessage network message header, 24 bytes.
+     *
+     * @return a buffer of size 24
+     */
+    public synchronized ByteBuffer allocateHeaderBuffer() {
+        Stack<ByteBuffer> pool = pools.get(HEADER_SIZE);
         if (!pool.isEmpty()) {
             return pool.pop();
         } else {
-            return ByteBuffer.allocate(capacities.get(Size.HEADER));
+            return ByteBuffer.allocate(HEADER_SIZE);
         }
     }
 
     public synchronized void deallocate(ByteBuffer buffer) {
         buffer.clear();
-        Size size = getTargetSize(buffer.capacity());
+
-        if (buffer.capacity() != capacities.get(size)) {
+        if (!pools.keySet().contains(buffer.capacity())) {
             throw new IllegalArgumentException("Illegal buffer capacity " + buffer.capacity() +
-                " one of " + capacities.values() + " expected.");
+                " one of " + pools.keySet() + " expected.");
         }
-        pools.get(size).push(buffer);
+        pools.get(buffer.capacity()).push(buffer);
     }
 
-    private Size getTargetSize(int capacity) {
+    private Integer getTargetSize(int capacity) {
-        for (Size s : Size.values()) {
+        for (Integer size : pools.keySet()) {
-            if (capacity <= capacities.get(s)) {
+            if (size >= capacity) return size;
-                return s;
-            }
         }
         throw new IllegalArgumentException("Requested capacity too large: " +
-            "requested=" + capacity + "; max=" + capacities.get(Size.LARGE));
+            "requested=" + capacity + "; max=" + MAX_PAYLOAD_SIZE);
-    }
-
-
-    private enum Size {
-        HEADER, SMALL, MEDIUM, LARGE;
-
-        public Size next() {
-            switch (this) {
-                case SMALL:
-                    return MEDIUM;
-                case MEDIUM:
-                    return LARGE;
-                default:
-                    return null;
-            }
-        }
     }
 }

core/src/main/java/ch/dissem/bitmessage/factory/V3MessageFactory.java

@@ -179,7 +179,13 @@ class V3MessageFactory {
         long services = Decode.int64(stream);
         byte[] ipv6 = Decode.bytes(stream, 16);
         int port = Decode.uint16(stream);
-        return new NetworkAddress.Builder().time(time).stream(streamNumber).services(services).ipv6(ipv6).port(port).build();
+        return new NetworkAddress.Builder()
+            .time(time)
+            .stream(streamNumber)
+            .services(services)
+            .ipv6(ipv6)
+            .port(port)
+            .build();
     }
 
     private static boolean testChecksum(byte[] checksum, byte[] payload) {

core/src/main/java/ch/dissem/bitmessage/factory/V3MessageReader.java

@@ -58,7 +58,7 @@ public class V3MessageReader {
     public ByteBuffer getActiveBuffer() {
         if (state != null && state != ReaderState.DATA) {
             if (headerBuffer == null) {
-                headerBuffer = bufferPool.allocate();
+                headerBuffer = bufferPool.allocateHeaderBuffer();
             }
         }
         return state == ReaderState.DATA ? dataBuffer : headerBuffer;

core/src/main/java/ch/dissem/bitmessage/ports/NetworkHandler.java

@@ -31,8 +31,9 @@ import java.util.concurrent.Future;
  */
 public interface NetworkHandler {
     int NETWORK_MAGIC_NUMBER = 8;
+    int HEADER_SIZE = 24;
     int MAX_PAYLOAD_SIZE = 1600003;
-    int MAX_MESSAGE_SIZE = 24 + MAX_PAYLOAD_SIZE;
+    int MAX_MESSAGE_SIZE = HEADER_SIZE + MAX_PAYLOAD_SIZE;
 
     /**
      * Connects to the trusted host, fetches and offers new messages and disconnects afterwards.

networking/src/main/java/ch/dissem/bitmessage/networking/AbstractConnection.java

@@ -99,6 +99,10 @@ public abstract class AbstractConnection {
         return state;
     }
 
+    public long[] getStreams() {
+        return streams;
+    }
+
     protected void handleMessage(MessagePayload payload) {
         switch (state) {
             case ACTIVE:

networking/src/main/java/ch/dissem/bitmessage/networking/DefaultNetworkHandler.java

@@ -170,7 +170,7 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
 
         for (Connection connection : connections) {
             if (connection.getState() == ACTIVE) {
-                long stream = connection.getNode().getStream();
+                for (long stream : connection.getStreams()) {
                     streams.add(stream);
                     if (connection.getMode() == SERVER) {
                         inc(incomingConnections, stream);
@@ -179,6 +179,7 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
                     }
                 }
             }
+        }
         Property[] streamProperties = new Property[streams.size()];
         int i = 0;
         for (Long stream : streams) {

networking/src/main/java/ch/dissem/bitmessage/networking/nio/ConnectionInfo.java

@@ -44,7 +44,7 @@ public class ConnectionInfo extends AbstractConnection {
     private ByteBuffer payloadOut;
     private V3MessageReader reader = new V3MessageReader();
     private boolean syncFinished;
-    private long lastUpdate = Long.MAX_VALUE;
+    private long lastUpdate = System.currentTimeMillis();
 
     public ConnectionInfo(InternalContext context, Mode mode,
                           NetworkAddress node, NetworkHandler.MessageListener listener,

networking/src/main/java/ch/dissem/bitmessage/networking/nio/NioNetworkHandler.java

@@ -33,6 +33,7 @@ import org.slf4j.LoggerFactory;
 import java.io.IOException;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
+import java.net.NoRouteToHostException;
 import java.nio.ByteBuffer;
 import java.nio.channels.*;
 import java.util.*;
@@ -46,7 +47,6 @@ import static ch.dissem.bitmessage.utils.DebugUtils.inc;
 import static ch.dissem.bitmessage.utils.ThreadFactoryBuilder.pool;
 import static java.nio.channels.SelectionKey.OP_READ;
 import static java.nio.channels.SelectionKey.OP_WRITE;
-import static java.util.Collections.synchronizedMap;
 
 /**
  * Network handler using java.nio, resulting in less threads.
@@ -209,7 +209,7 @@ public class NioNetworkHandler implements NetworkHandler, InternalContext.Contex
                                     connection,
                                     channel.register(selector, OP_READ | OP_WRITE, connection)
                                 );
-                            } catch (AsynchronousCloseException ignore) {
+                            } catch (NoRouteToHostException | AsynchronousCloseException ignore) {
                             } catch (IOException e) {
                                 LOG.error(e.getMessage(), e);
                             }
@@ -268,7 +268,7 @@ public class NioNetworkHandler implements NetworkHandler, InternalContext.Contex
                                     } else {
                                         key.interestOps(OP_READ | OP_WRITE);
                                     }
-                                } catch (NodeException | IOException e) {
+                                } catch (CancelledKeyException | NodeException | IOException e) {
                                     connection.disconnect();
                                 }
                                 if (connection.getState() == DISCONNECTED) {
@@ -413,7 +413,7 @@ public class NioNetworkHandler implements NetworkHandler, InternalContext.Contex
 
         for (ConnectionInfo connection : connections.keySet()) {
             if (connection.getState() == ACTIVE) {
-                long stream = connection.getNode().getStream();
+                for (long stream : connection.getStreams()) {
                     streams.add(stream);
                     if (connection.getMode() == SERVER) {
                         inc(incomingConnections, stream);
@@ -422,6 +422,7 @@ public class NioNetworkHandler implements NetworkHandler, InternalContext.Contex
                     }
                 }
             }
+        }
         Property[] streamProperties = new Property[streams.size()];
         int i = 0;
         for (Long stream : streams) {

networking/src/test/java/ch/dissem/bitmessage/networking/NetworkHandlerTest.java

@@ -169,15 +169,24 @@ public class NetworkHandlerTest {
         } while (networkHandler.isRunning());
     }
 
-    @Test
+    private Property waitForNetworkStatus(BitmessageContext ctx) throws InterruptedException {
-    public void ensureNodesAreConnecting() throws Exception {
-        node.startup();
         Property status;
         do {
             Thread.sleep(100);
-            status = node.status().getProperty("network", "connections", "stream 0");
+            status = ctx.status().getProperty("network", "connections", "stream 1");
         } while (status == null);
-        assertEquals(1, status.getProperty("outgoing").getValue());
+        return status;
+    }
+
+    @Test
+    public void ensureNodesAreConnecting() throws Exception {
+        node.startup();
+
+        Property nodeStatus = waitForNetworkStatus(node);
+        Property peerStatus = waitForNetworkStatus(peer);
+
+        assertEquals(1, nodeStatus.getProperty("outgoing").getValue());
+        assertEquals(1, peerStatus.getProperty("incoming").getValue());
     }
 
     @Test