very basic tests pass (ping, open then pause then close, open then echo back and forth a few times then close)

apps/streaming/java/src/net/i2p/client/streaming/PacketQueue.java

@@ -0,0 +1,56 @@
+package net.i2p.client.streaming;
+
+import java.util.Set;
+import java.util.HashSet;
+
+import net.i2p.I2PAppContext;
+import net.i2p.client.I2PSession;
+import net.i2p.client.I2PSessionException;
+import net.i2p.data.SessionKey;
+import net.i2p.util.Log;
+
+/**
+ *
+ */
+class PacketQueue {
+    private I2PAppContext _context;
+    private Log _log;
+    private I2PSession _session;
+    private byte _buf[];
+    
+    public PacketQueue(I2PAppContext context, I2PSession session) {
+        _context = context;
+        _session = session;
+        _buf = new byte[36*1024];
+        _log = context.logManager().getLog(PacketQueue.class);
+    }
+    
+    /**
+     * Add a new packet to be sent out ASAP
+     */
+    public void enqueue(PacketLocal packet) {
+        int size = 0;
+        if (packet.shouldSign())
+            size = packet.writeSignedPacket(_buf, 0, _context, _session.getPrivateKey());
+        else
+            size = packet.writePacket(_buf, 0);
+        
+        SessionKey keyUsed = new SessionKey();
+        Set tagsSent = new HashSet();
+        try {
+            // this should not block!
+            boolean sent = _session.sendMessage(packet.getTo(), _buf, 0, size, keyUsed, tagsSent);
+            if (!sent) {
+                if (_log.shouldLog(Log.WARN))
+                    _log.warn("Send failed for " + packet);
+            } else {
+                packet.setKeyUsed(keyUsed);
+                packet.setTagsSent(tagsSent);
+                packet.incrementSends();
+            }
+        } catch (I2PSessionException ise) {
+            if (_log.shouldLog(Log.WARN))
+                _log.warn("Unable to send the packet " + packet, ise);
+        }
+    }
+}