org.apache.james.backends.es.ClientProviderImpl.java Source code

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package org.apache.james.backends.es;

import java.net.InetAddress;

import org.apache.james.util.Host;
import org.elasticsearch.client.Client;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.transport.InetSocketTransportAddress;

import com.github.fge.lambdas.Throwing;
import com.github.fge.lambdas.consumers.ConsumerChainer;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;

public class ClientProviderImpl implements ClientProvider {

    public static ClientProviderImpl forHost(String address, Integer port) {
        isValidPort(port);
        return new ClientProviderImpl(ImmutableList.of(Host.from(address, port)));
    }

    public static ClientProviderImpl fromHostsString(String hostsString) {
        Preconditions.checkNotNull(hostsString, "HostString should not be null");
        return new ClientProviderImpl(Host.parseHosts(hostsString));
    }

    private static boolean isValidPort(Integer port) {
        return port > 0 && port <= 65535;
    }

    private final ImmutableList<Host> hosts;

    private ClientProviderImpl(ImmutableList<Host> hosts) {
        Preconditions.checkArgument(!hosts.isEmpty(), "You should provide at least one host");
        this.hosts = hosts;
    }

    public Client get() {
        TransportClient transportClient = TransportClient.builder().build();
        ConsumerChainer<Host> consumer = Throwing.consumer(host -> transportClient.addTransportAddress(
                new InetSocketTransportAddress(InetAddress.getByName(host.getHostName()), host.getPort())));
        hosts.forEach(consumer.sneakyThrow());
        return transportClient;
    }
}