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High-performance and fault-tolerant remote procedure call module for building distributed applications. Provides a high-performance asynchronous binary RPC streaming protocol.

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/*
 * Copyright (C) 2015 SoftIndex LLC.
 *
 * 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 io.datakernel.rpc.client.sender;

import io.datakernel.rpc.client.RpcClientConnectionPool;
import org.jetbrains.annotations.Nullable;

import java.net.InetSocketAddress;
import java.util.List;
import java.util.Set;

public final class RpcStrategyFirstAvailable implements RpcStrategy {
	private final RpcStrategyList list;

	private RpcStrategyFirstAvailable(RpcStrategyList list) {
		this.list = list;
	}

	public static RpcStrategyFirstAvailable create(RpcStrategyList list) {return new RpcStrategyFirstAvailable(list);}

	@Override
	public Set getAddresses() {
		return list.getAddresses();
	}

	@Nullable
	@Override
	public RpcSender createSender(RpcClientConnectionPool pool) {
		List senders = list.listOfSenders(pool);
		if (senders.isEmpty())
			return null;
		return senders.get(0);
	}
}