alluxio.worker.netty.AsyncCacheHandler.java Source code

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Here is the source code for alluxio.worker.netty.AsyncCacheHandler.java

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/*
 * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
 * (the "License"). You may not use this work except in compliance with the License, which is
 * available at www.apache.org/licenses/LICENSE-2.0
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied, as more fully set forth in the License.
 *
 * See the NOTICE file distributed with this work for information regarding copyright ownership.
 */

package alluxio.worker.netty;

import alluxio.network.protocol.RPCProtoMessage;
import alluxio.proto.dataserver.Protocol;
import alluxio.worker.block.AsyncCacheRequestManager;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;

/**
 * Handler for async cache requests.
 */
public class AsyncCacheHandler extends ChannelInboundHandlerAdapter {
    private final AsyncCacheRequestManager mRequestManager;

    /**
     * Constructs a new async cache handler.
     *
     * @param requestManager the async cache manager
     */
    public AsyncCacheHandler(AsyncCacheRequestManager requestManager) {
        mRequestManager = requestManager;
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object object) throws Exception {
        if (object instanceof RPCProtoMessage && ((RPCProtoMessage) object).getMessage().isAsyncCacheRequest()) {
            Protocol.AsyncCacheRequest request = ((RPCProtoMessage) object).getMessage().asAsyncCacheRequest();
            mRequestManager.submitRequest(request);
            // Note that, because the client side of this RPC end point is fireAndForget, thus expecting
            // no response. No OK response will be returned here.
        } else {
            ctx.fireChannelRead(object);
        }
    }
}