1 files changed, 82 insertions, 0 deletions
diff --git a/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/transport/server/XceiverServerHandler.java b/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/transport/server/XceiverServerHandler.java
new file mode 100644
index 0000000000..5947dde75d
--- /dev/null
+++ b/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/transport/server/XceiverServerHandler.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.hadoop.ozone.container.common.transport.server;
+
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.SimpleChannelInboundHandler;
+import org.apache.hadoop.hdds.protocol.proto.ContainerProtos
+    .ContainerCommandRequestProto;
+import org.apache.hadoop.hdds.protocol.proto.ContainerProtos
+    .ContainerCommandResponseProto;
+import org.apache.hadoop.ozone.container.common.interfaces.ContainerDispatcher;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Netty server handlers that respond to Network events.
+ */
+public class XceiverServerHandler extends
+    SimpleChannelInboundHandler<ContainerCommandRequestProto> {
+
+  static final Logger LOG = LoggerFactory.getLogger(XceiverServerHandler.class);
+  private final ContainerDispatcher dispatcher;
+
+  /**
+   * Constructor for server handler.
+   * @param dispatcher - Dispatcher interface
+   */
+  public XceiverServerHandler(ContainerDispatcher dispatcher) {
+    this.dispatcher = dispatcher;
+  }
+
+  /**
+   * <strong>Please keep in mind that this method will be renamed to {@code
+   * messageReceived(ChannelHandlerContext, I)} in 5.0.</strong>
+   * <p>
+   * Is called for each message of type {@link ContainerCommandRequestProto}.
+   *
+   * @param ctx the {@link ChannelHandlerContext} which this {@link
+   *            SimpleChannelInboundHandler} belongs to
+   * @param msg the message to handle
+   * @throws Exception is thrown if an error occurred
+   */
+  @Override
+  public void channelRead0(ChannelHandlerContext ctx,
+                           ContainerCommandRequestProto msg) throws
+      Exception {
+    ContainerCommandResponseProto response = this.dispatcher.dispatch(msg);
+    LOG.debug("Writing the reponse back to client.");
+    ctx.writeAndFlush(response);
+
+  }
+
+  /**
+   * Calls {@link ChannelHandlerContext#fireExceptionCaught(Throwable)}
+   * Sub-classes may override this method to change behavior.
+   *
+   * @param ctx   - Channel Handler Context
+   * @param cause - Exception
+   */
+  @Override
+  public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause)
+      throws Exception {
+    LOG.error("An exception caught in the pipeline : " + cause.toString());
+    super.exceptionCaught(ctx, cause);
+  }
+}