BackendServiceClientChannelProviderFactory.java

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// to you 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
//
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package org.apache.doris.rpc;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.util.Iterator;
import java.util.ServiceLoader;

public final class BackendServiceClientChannelProviderFactory {
    private static final Logger LOG = LogManager.getLogger(BackendServiceClientChannelProviderFactory.class);

    private BackendServiceClientChannelProviderFactory() {
    }

    public static BackendServiceClientChannelProvider create() {
        ServiceLoader<BackendServiceClientChannelProvider> loader =
                ServiceLoader.load(BackendServiceClientChannelProvider.class);
        Iterator<BackendServiceClientChannelProvider> iterator = loader.iterator();
        if (iterator.hasNext()) {
            BackendServiceClientChannelProvider provider = iterator.next();
            LOG.info("Using BackendServiceClientChannelProvider implementation: {}",
                    provider.getClass().getName());
            return provider;
        }
        LOG.info("No custom BackendServiceClientChannelProvider found, fallback to OSS implementation");
        return new OssBackendServiceClientChannelProvider();
    }
}