org.robotninjas.barge.rpc.ProtoRpcRaftClientProvider.java Source code

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Here is the source code for org.robotninjas.barge.rpc.ProtoRpcRaftClientProvider.java

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/**
 * Copyright 2013 David Rusek <dave dot rusek at gmail dot 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 org.robotninjas.barge.rpc;

import com.google.common.util.concurrent.ListenableFuture;
import org.apache.commons.pool.KeyedObjectPool;
import org.apache.commons.pool.PoolUtils;
import org.apache.commons.pool.impl.GenericKeyedObjectPool;
import org.robotninjas.barge.Replica;
import org.robotninjas.protobuf.netty.client.NettyRpcChannel;
import org.robotninjas.protobuf.netty.client.RpcClient;

import javax.annotation.Nonnull;
import javax.annotation.concurrent.Immutable;
import javax.inject.Inject;

import static com.google.common.base.Preconditions.checkNotNull;

@Immutable
class ProtoRpcRaftClientProvider implements RaftClientProvider {

    private static final GenericKeyedObjectPool.Config config;

    static {
        config = new GenericKeyedObjectPool.Config();
        config.maxActive = 1;
        config.maxIdle = -1;
        config.testOnBorrow = true;
        config.testOnReturn = true;
        config.whenExhaustedAction = GenericKeyedObjectPool.WHEN_EXHAUSTED_FAIL;
    }

    private final KeyedObjectPool<Object, ListenableFuture<NettyRpcChannel>> connectionPools;

    @Inject
    public ProtoRpcRaftClientProvider(@Nonnull RpcClient client) {
        RpcChannelFactory channelFactory = new RpcChannelFactory(client);
        this.connectionPools = new GenericKeyedObjectPool(channelFactory, config);
    }

    @Nonnull
    public RaftClient get(@Nonnull Replica replica) {
        checkNotNull(replica);
        return new ProtoRpcRaftClient(PoolUtils.adapt(connectionPools, replica));
    }

}