io.streamthoughts.kafka.specs.internal.AdminClientUtils Maven / Gradle / Ivy

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Tool to ease and automate Apache Kafka cluster configuration management
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/*
 * Copyright 2020 StreamThoughts.
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file 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
 *
 * 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.streamthoughts.kafka.specs.internal;

import org.apache.kafka.clients.CommonClientConfigs;
import org.apache.kafka.clients.admin.AdminClient;
import org.apache.kafka.clients.admin.TopicListing;
import org.apache.kafka.common.KafkaFuture;
import org.apache.kafka.common.Node;

import java.io.File;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;
import java.util.Objects;
import java.util.Properties;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;

import static io.streamthoughts.kafka.specs.internal.FutureUtils.toCompletableFuture;

/**
 * Class which is used to create a new {@link AdminClient} instance using tool arguments.
 */
public class AdminClientUtils {

    public static AdminClient newAdminClient(final String bootstrapServer,
                                             final File clientConfigFile,
                                             final Map clientConfigProps){
        final Properties props = loadClientPropertiesConfig(clientConfigFile);
        props.putAll(clientConfigProps);
        props.put(
                CommonClientConfigs.BOOTSTRAP_SERVERS_CONFIG,
                props.getProperty(CommonClientConfigs.BOOTSTRAP_SERVERS_CONFIG, bootstrapServer)
        );
        return AdminClient.create(props);
    }

    private static Properties loadClientPropertiesConfig(final File clientConfigFile) {
        final Properties props = new Properties();
        if (clientConfigFile != null) {
            if (!clientConfigFile.exists() || !clientConfigFile.canRead()) {
                throw new IllegalArgumentException(
                        "Invalid argument : File doesn't exist or is not readable : ' "
                        + clientConfigFile.getPath() + " ' "
                );
            }
            try {
                Properties properties = PropertiesUtils.loadProps(clientConfigFile);
                props.putAll(properties);
            } catch (IOException e) {
                throw new IllegalArgumentException(
                        "Invalid argument : File doesn't exist or is not readable : ' "
                        + clientConfigFile.getPath() + " ' "
                );
            }
        }
        return props;
    }

    public static CompletableFuture> listBrokers(final AdminClient client) {
        Objects.requireNonNull(client, "client cannot be null");
        return toCompletableFuture(client.describeCluster().nodes());
    }

    public static CompletableFuture> listTopics(final AdminClient client) {
        Objects.requireNonNull(client, "client cannot be null");
        return toCompletableFuture(client.listTopics().listings());
    }
}