minor refactorings to make it easier to derive from

git-svn-id: https://svn.apache.org/repos/asf/incubator/activemq/trunk@384755 13f79535-47bb-0310-9956-ffa450edef68

activemq-core/src/main/java/org/apache/activemq/transport/udp/CommandChannel.java

@@ -29,7 +29,6 @@ import java.io.ByteArrayOutputStream;
 import java.io.DataInputStream;
 import java.io.DataOutputStream;
 import java.io.IOException;
-import java.net.InetSocketAddress;
 import java.net.SocketAddress;
 import java.nio.ByteBuffer;
 import java.nio.channels.DatagramChannel;
@@ -50,7 +49,7 @@ public class CommandChannel implements Service {
     private int datagramSize = 4 * 1024;
     private DatagramReplayStrategy replayStrategy;
     private SocketAddress targetAddress;
-    private DatagramHeaderMarshaller headerMarshaller = new DatagramHeaderMarshaller();
+    private DatagramHeaderMarshaller headerMarshaller;
     private final boolean checkSequenceNumbers;
 
     // reading
@@ -67,7 +66,7 @@ public class CommandChannel implements Service {
     private DatagramHeader header = new DatagramHeader();
 
     public CommandChannel(String name, DatagramChannel channel, OpenWireFormat wireFormat, ByteBufferPool bufferPool, int datagramSize,
-            DatagramReplayStrategy replayStrategy, SocketAddress targetAddress, boolean checkSequenceNumbers) {
+            DatagramReplayStrategy replayStrategy, SocketAddress targetAddress, boolean checkSequenceNumbers, DatagramHeaderMarshaller headerMarshaller) {
         this.name = name;
         this.channel = channel;
         this.wireFormat = wireFormat;
@@ -76,6 +75,7 @@ public class CommandChannel implements Service {
         this.replayStrategy = replayStrategy;
         this.targetAddress = targetAddress;
         this.checkSequenceNumbers = checkSequenceNumbers;
+        this.headerMarshaller = headerMarshaller;
     }
 
     public String toString() {

activemq-core/src/main/java/org/apache/activemq/transport/udp/DatagramHeaderMarshaller.java

@@ -25,8 +25,12 @@ import java.nio.ByteBuffer;
  */
 public class DatagramHeaderMarshaller {
 
+    public DatagramHeader createDatagramHeader() {
+        return new DatagramHeader();
+    }
+
     public DatagramHeader readHeader(ByteBuffer readBuffer) {
-        DatagramHeader answer = new DatagramHeader();
+        DatagramHeader answer = createDatagramHeader();
         answer.setCounter(readBuffer.getLong());
         answer.setDataSize(readBuffer.getInt());
         byte flags = readBuffer.get();
@@ -46,5 +50,4 @@ public class DatagramHeaderMarshaller {
     public int getHeaderSize(DatagramHeader header) {
         return 8 + 4 + 1;
     }
-
 }

activemq-core/src/main/java/org/apache/activemq/transport/udp/UdpTransport.java

@@ -82,7 +82,7 @@ public class UdpTransport extends TransportThreadSupport implements Transport, S
     public UdpTransport(OpenWireFormat wireFormat, SocketAddress socketAddress) throws IOException {
         this(wireFormat);
         this.targetAddress = socketAddress;
-        this.description = "UdpServerConnection@";
+        this.description = getProtocolName() + "ServerConnection@";
     }
 
     /**
@@ -92,7 +92,7 @@ public class UdpTransport extends TransportThreadSupport implements Transport, S
         this(wireFormat);
         this.port = port;
         this.targetAddress = null;
-        this.description = "UdpServer@";
+        this.description = getProtocolName() + "Server@";
     }
 
     /**
@@ -113,7 +113,6 @@ public class UdpTransport extends TransportThreadSupport implements Transport, S
         commandChannel.write(command, address);
     }
 
-
     public void receivedHeader(DatagramHeader header) {
         wireFormatHeader = header;
     }
@@ -126,7 +125,7 @@ public class UdpTransport extends TransportThreadSupport implements Transport, S
             return description + port;
         }
         else {
-            return "udp://" + targetAddress + "@" + port;
+            return getProtocolUriScheme() + targetAddress + "@" + port;
         }
     }
 
@@ -169,6 +168,22 @@ public class UdpTransport extends TransportThreadSupport implements Transport, S
         }
     }
 
+    /**
+     * We have received the WireFormatInfo from the server on the actual channel
+     * we should use for all future communication with the server, so lets set
+     * the target to be the actual channel that the server has chosen for us to
+     * talk on.
+     */
+    public void useLastInboundDatagramAsNewTarget() {
+        if (originalTargetAddress == null) {
+            originalTargetAddress = targetAddress;
+        }
+        SocketAddress lastAddress = commandChannel.getLastReadDatagramAddress();
+        if (lastAddress != null) {
+            targetAddress = lastAddress;
+        }
+    }
+
     // Properties
     // -------------------------------------------------------------------------
     public boolean isTrace() {
@@ -313,7 +328,7 @@ public class UdpTransport extends TransportThreadSupport implements Transport, S
         if (bufferPool == null) {
             bufferPool = new DefaultBufferPool();
         }
-        commandChannel = new CommandChannel(toString(), channel, wireFormat, bufferPool, datagramSize, replayStrategy, targetAddress, isCheckSequenceNumbers());
+        commandChannel = new CommandChannel(toString(), channel, wireFormat, bufferPool, datagramSize, replayStrategy, targetAddress, isCheckSequenceNumbers(), createDatagramHeaderMarshaller());
         commandChannel.start();
 
         // lets pass the header & address into the channel so it avoids a
@@ -331,21 +346,15 @@ public class UdpTransport extends TransportThreadSupport implements Transport, S
         }
     }
 
-    /**
+    protected DatagramHeaderMarshaller createDatagramHeaderMarshaller() {
-     * We have received the WireFormatInfo from the server on the actual channel
+        return new DatagramHeaderMarshaller();
-     * we should use for all future communication with the server, so lets set
-     * the target to be the actual channel that the server has chosen for us to
-     * talk on.
-     */
-    public void useLastInboundDatagramAsNewTarget() {
-        if (originalTargetAddress == null) {
-            originalTargetAddress = targetAddress;
-        }
-        SocketAddress lastAddress = commandChannel.getLastReadDatagramAddress();
-        if (lastAddress != null) {
-            targetAddress = lastAddress;
-        }
     }
 
+    protected String getProtocolName() {
+        return "Udp";
+    }
 
+    protected String getProtocolUriScheme() {
+        return "udp://";
+    }
 }