1 files changed, 60 insertions, 0 deletions
diff --git a/core/src/main/java/org/apache/spark/network/netty/FileClientHandler.java b/core/src/main/java/org/apache/spark/network/netty/FileClientHandler.java
new file mode 100644
index 0000000000..c4aa2669e0
--- /dev/null
+++ b/core/src/main/java/org/apache/spark/network/netty/FileClientHandler.java
@@ -0,0 +1,60 @@
+/*
+ * 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.spark.network.netty;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundByteHandlerAdapter;
+
+
+abstract class FileClientHandler extends ChannelInboundByteHandlerAdapter {
+
+  private FileHeader currentHeader = null;
+
+  private volatile boolean handlerCalled = false;
+
+  public boolean isComplete() {
+    return handlerCalled;
+  }
+
+  public abstract void handle(ChannelHandlerContext ctx, ByteBuf in, FileHeader header);
+  public abstract void handleError(String blockId);
+
+  @Override
+  public ByteBuf newInboundBuffer(ChannelHandlerContext ctx) {
+    // Use direct buffer if possible.
+    return ctx.alloc().ioBuffer();
+  }
+
+  @Override
+  public void inboundBufferUpdated(ChannelHandlerContext ctx, ByteBuf in) {
+    // get header
+    if (currentHeader == null && in.readableBytes() >= FileHeader.HEADER_SIZE()) {
+      currentHeader = FileHeader.create(in.readBytes(FileHeader.HEADER_SIZE()));
+    }
+    // get file
+    if(in.readableBytes() >= currentHeader.fileLen()) {
+      handle(ctx, in, currentHeader);
+      handlerCalled = true;
+      currentHeader = null;
+      ctx.close();
+    }
+  }
+
+}
+