Cleanup XMPPTCPConnection, mostly exception handling

In initConnection, only initReaderAndWriter() throws IOException.

connectUsingConfiguration doesn't need to take an argument.

PacketReader.init does not throw a SmackException.

Use Async.go() in PacketWriter, just like it's already done in PacketReader.

smack-core/src/main/java/org/jivesoftware/smack/compression/XMPPInputOutputStream.java

@@ -16,6 +16,7 @@
  */
 package org.jivesoftware.smack.compression;
 
+import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 
@@ -47,9 +48,9 @@ public abstract class XMPPInputOutputStream {
 
     public abstract boolean isSupported();
 
-    public abstract InputStream getInputStream(InputStream inputStream) throws Exception;
+    public abstract InputStream getInputStream(InputStream inputStream) throws IOException;
 
-    public abstract OutputStream getOutputStream(OutputStream outputStream) throws Exception;
+    public abstract OutputStream getOutputStream(OutputStream outputStream) throws IOException;
 
     public enum FlushMethod {
         FULL_FLUSH,

smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XMPPTCPConnection.java

@@ -516,7 +516,7 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
         }
     }
 
-    private void connectUsingConfiguration(XMPPTCPConnectionConfiguration config) throws SmackException, IOException {
+    private void connectUsingConfiguration() throws IOException, ConnectionException {
         populateHostAddresses();
 
         List<HostAddress> failedAddresses = new LinkedList<HostAddress>();
@@ -574,14 +574,13 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
      * @throws SmackException if the server failes to respond back or if there is anther error.
      * @throws IOException 
      */
-    private void initConnection() throws SmackException, IOException {
+    private void initConnection() throws IOException {
         boolean isFirstInitialization = packetReader == null || packetWriter == null;
         compressionHandler = null;
 
         // Set the reader and writer instance variables
         initReaderAndWriter();
 
-        try {
         if (isFirstInitialization) {
             packetWriter = new PacketWriter();
             packetReader = new PacketReader();
@@ -607,21 +606,9 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
                 listener.connectionCreated(this);
             }
         }
-
-        }
-        catch (SmackException ex) {
-            // An exception occurred in setting up the connection. Note that
-            // it's important here that we do an instant shutdown here, as this
-            // will not send a closing stream element, which will destroy
-            // Stream Management state on the server, which is not what we want.
-            instantShutdown();
-            // Everything stopped. Now throw the exception.
-            throw ex;
-        }
     }
 
-    private void initReaderAndWriter() throws IOException, SmackException {
+    private void initReaderAndWriter() throws IOException {
-        try {
         InputStream is = socket.getInputStream();
         OutputStream os = socket.getOutputStream();
         if (compressionHandler != null) {
@@ -631,13 +618,6 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
         // OutputStreamWriter is already buffered, no need to wrap it into a BufferedWriter
         writer = new OutputStreamWriter(os, "UTF-8");
         reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
-        }
-        catch (IOException e) {
-            throw e;
-        }
-        catch (Exception e) {
-            throw new SmackException(e);
-        }
 
         // If debugging is enabled, we open a window and write out all network traffic.
         initDebugger();
@@ -817,7 +797,7 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
     protected void connectInternal() throws SmackException, IOException, XMPPException {
         throwAlreadyConnectedExceptionIfAppropriate();
         // Establishes the connection, readers and writers
-        connectUsingConfiguration(config);
+        connectUsingConfiguration();
         socketClosed = false;
         initConnection();
 
@@ -920,10 +900,8 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
         /**
          * Initializes the reader in order to be used. The reader is initialized during the
          * first connection and when reconnecting due to an abruptly disconnection.
-         *
-         * @throws SmackException if the parser could not be reset.
          */
-        void init() throws SmackException {
+        void init() {
             done = false;
 
             Async.go(new Runnable() {
@@ -1148,8 +1126,6 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
         private final ArrayBlockingQueueWithShutdown<Element> queue = new ArrayBlockingQueueWithShutdown<Element>(
                         QUEUE_SIZE, true);
 
-        private Thread writerThread;
-
         /**
          * Needs to be protected for unit testing purposes.
          */
@@ -1179,14 +1155,12 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
             }
 
             queue.start();
-            writerThread = new Thread() {
+            Async.go(new Runnable() {
+                @Override
                 public void run() {
                     writePackets();
                 }
-            };
+            }, "Smack Packet Writer (" + getConnectionCounter() + ")");
-            writerThread.setName("Smack Packet Writer (" + getConnectionCounter() + ")");
-            writerThread.setDaemon(true);
-            writerThread.start();
         }
 
         private boolean done() {