Support error websocket channel

kubernetes-client/src/main/java/io/fabric8/kubernetes/client/dsl/ErrorChannelable.java

@@ -0,0 +1,31 @@
+/**
+ * Copyright (C) 2015 Red Hat, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.fabric8.kubernetes.client.dsl;
+
+/**
+ * @param <O>   Where to write errorChannel to.
+ * @param <P>   Where to read errorChannel from.
+ * @param <T>   The return type.
+ */
+public interface ErrorChannelable<O, P, T> {
+
+    T writingErrorChannel(O in);
+
+    T readingErrorChannel(P in);
+
+    T redirectingErrorChannel();
+}

kubernetes-client/src/main/java/io/fabric8/kubernetes/client/dsl/ExecWatch.java

@@ -27,6 +27,8 @@ public interface ExecWatch extends Closeable {
 
   InputStream getError();
 
+  InputStream getErrorChannel();
+
   /**
    * Close the Watch.
    */

kubernetes-client/src/main/java/io/fabric8/kubernetes/client/dsl/TtyExecErrorChannelable.java

@@ -0,0 +1,27 @@
+/**
+ * Copyright (C) 2015 Red Hat, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.fabric8.kubernetes.client.dsl;
+
+/**
+ * @param <X>   The exec input.
+ * @param <O>   Where to write err channel to.
+ * @param <P>   Where to read err channel from.
+ * @param <T>   The exec output.
+ */
+public interface TtyExecErrorChannelable<X, O, P, T> extends
+        TtyExecable<X, T>,
+        ErrorChannelable<O, P, TtyExecable<X, T>> {
+}

kubernetes-client/src/main/java/io/fabric8/kubernetes/client/dsl/TtyExecErrorable.java

@@ -24,7 +24,7 @@
  * @param <T>   The exec output.
  */
 public interface TtyExecErrorable<X, O, P, T> extends
-        TtyExecable<X, T>,
-        Errorable<O, P, TtyExecable<X, T>> {
+        TtyExecErrorChannelable<X, O, P, T>,
+        Errorable<O, P, TtyExecErrorChannelable<X, O, P, T>> {
 
 }

kubernetes-client/src/main/java/io/fabric8/kubernetes/client/dsl/internal/ExecWebSocketListener.java

@@ -66,10 +66,12 @@ public class ExecWebSocketListener extends WebSocketListener implements ExecWatc
     private final InputStream in;
     private final OutputStream out;
     private final OutputStream err;
+    private final OutputStream errChannel;
 
     private final PipedOutputStream input;
     private final PipedInputStream output;
     private final PipedInputStream error;
+    private final PipedInputStream errorChannel;
 
     private final AtomicReference<WebSocket> webSocketRef = new AtomicReference<>();
     private final ExecutorService executorService = Executors.newSingleThreadExecutor();
@@ -92,16 +94,23 @@ public ExecWebSocketListener(InputStream in, OutputStream out, OutputStream err,
         this(new Config(), in, out, err, inputPipe, outputPipe, errorPipe, listener);
     }
 
+    @Deprecated
     public ExecWebSocketListener(Config config, InputStream in, OutputStream out, OutputStream err, PipedOutputStream inputPipe, PipedInputStream outputPipe, PipedInputStream errorPipe, ExecListener listener) {
+        this(config, in, out, err, null, inputPipe, outputPipe, errorPipe, null, listener);
+    }
+
+    public ExecWebSocketListener(Config config, InputStream in, OutputStream out, OutputStream err, OutputStream errChannel, PipedOutputStream inputPipe, PipedInputStream outputPipe, PipedInputStream errorPipe, PipedInputStream errorChannelPipe, ExecListener listener) {
         this.config = config;
         this.listener = listener;
         this.in = inputStreamOrPipe(in, inputPipe, toClose);
         this.out = outputStreamOrPipe(out, outputPipe, toClose);
         this.err = outputStreamOrPipe(err, errorPipe, toClose);
+        this.errChannel = outputStreamOrPipe(errChannel, errorChannelPipe, toClose);
 
         this.input = inputPipe;
         this.output = outputPipe;
         this.error = errorPipe;
+        this.errorChannel = errorChannelPipe;
         this.pumper = new NonBlockingInputStreamPumper(this.in, new Callback<byte[]>() {
             @Override
             public void call(byte[] data) {
@@ -182,6 +191,9 @@ public void onOpen(WebSocket webSocket, Response response) {
             if (err instanceof PipedOutputStream && error != null) {
                 error.connect((PipedOutputStream) err);
             }
+            if (errChannel instanceof PipedOutputStream && errorChannel != null) {
+                errorChannel.connect((PipedOutputStream) errChannel);
+            }
 
             webSocketRef.set(webSocket);
             executorService.submit(pumper);
@@ -242,8 +254,8 @@ public void onMessage(WebSocket webSocket, ByteString bytes) {
                         }
                         break;
                     case 3:
-                        if (err != null) {
-                            err.write(byteString.toByteArray());
+                        if (errChannel != null) {
+                            errChannel.write(byteString.toByteArray());
                         }
                         break;
                     default:
@@ -290,6 +302,10 @@ public InputStream getError() {
         return error;
     }
 
+    public InputStream getErrorChannel() {
+        return errorChannel;
+    }
+
     private void send(byte[] bytes) throws IOException {
         if (bytes.length > 0) {
             WebSocket ws = webSocketRef.get();