com.dinstone.rpc.netty.client.SessionUtil.java Source code

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Here is the source code for com.dinstone.rpc.netty.client.SessionUtil.java

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/*
 * Copyright (C) 2012~2014 dinstone<dinstone@163.com>
 *
 * 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 com.dinstone.rpc.netty.client;

import io.netty.channel.Channel;
import io.netty.util.Attribute;
import io.netty.util.AttributeKey;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import com.dinstone.rpc.CallFuture;
import com.dinstone.rpc.client.Connection;

public class SessionUtil {

    private static final AttributeKey<Object> CONNECTION_KEY = AttributeKey.valueOf(Connection.class.getName());

    private static final AttributeKey<Object> CALL_KEY = AttributeKey.valueOf("OPERATION_QUEUE");

    @SuppressWarnings("unchecked")
    public static Map<Integer, CallFuture> getCallFutureMap(Channel session) {
        Attribute<Object> attr = session.attr(CALL_KEY);
        Map<Integer, CallFuture> cfMap = (Map<Integer, CallFuture>) attr.get();
        if (cfMap == null) {
            cfMap = new ConcurrentHashMap<Integer, CallFuture>();
            if (!attr.compareAndSet(null, cfMap)) {
                cfMap = (Map<Integer, CallFuture>) attr.get();
            }
        }

        return cfMap;
    }

    public static void setConnection(Channel session, Connection connection) {
        session.attr(CONNECTION_KEY).set(connection);
    }

    public static Connection getConnection(Channel session) {
        return (Connection) session.attr(AttributeKey.valueOf(Connection.class.getName())).get();
    }
}