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From GitBox <...@apache.org>
Subject [GitHub] [airavata-mft] DImuthuUpe commented on a change in pull request #1: NIO based file transport implementation
Date Fri, 16 Aug 2019 04:12:41 GMT
DImuthuUpe commented on a change in pull request #1: NIO based file transport implementation
URL: https://github.com/apache/airavata-mft/pull/1#discussion_r314575572
 
 

 ##########
 File path: core/src/main/java/org/apache/airavata/mft/core/bufferedImpl/PassthroughMediator.java
 ##########
 @@ -0,0 +1,82 @@
+/*
+ *   Licensed to the Apache Software Foundation (ASF) under one
+ *   or more contributor license agreements.  See the NOTICE file
+ *   distributed with this work for additional information
+ *   regarding copyright ownership.  The ASF licenses this file
+ *   to you 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 org.apache.airavata.mft.core.bufferedImpl;
+
+import org.apache.airavata.mft.core.api.*;
+
+import java.io.IOException;
+import java.nio.channels.FileChannel;
+import java.nio.channels.ReadableByteChannel;
+import java.nio.channels.WritableByteChannel;
+
+/**
+ * This class wire the input stream and output stream based on the Channel type.
+ * If  either source or destination channels are FileChannel then wire using
+ * zero copy technique of FileChannel class.
+ * Other wise use DirectByteBuffers to copy data from source to destination.
+ */
+public class PassthroughMediator implements Mediator {
+
+    @Override
+    public void mediate(ConnectorChannel src, ConnectorChannel dst, CompletionCallback callback)
{
+        ReadableByteChannel rChannel = (ReadableByteChannel) src.getChannel();
+        WritableByteChannel dChannel = (WritableByteChannel) dst.getChannel();
+        try {
+            if (rChannel instanceof FileChannel) {
 
 Review comment:
   Are there the only 3 cases? What if both src and dst channels are local file channels?

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