org.eclipse.ditto.connectivity.service.config.DefaultKafkaConsumerConfig Maven / Gradle / Ivy
/*
* Copyright (c) 2021 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.connectivity.service.config;
import java.time.Duration;
import java.util.Objects;
import javax.annotation.concurrent.Immutable;
import org.eclipse.ditto.base.service.config.supervision.DefaultExponentialBackOffConfig;
import org.eclipse.ditto.base.service.config.supervision.ExponentialBackOffConfig;
import org.eclipse.ditto.internal.utils.config.DittoConfigError;
import com.typesafe.config.Config;
import com.typesafe.config.ConfigFactory;
/**
* This class is the default implementation of {@link KafkaConsumerConfig}.
*/
@Immutable
final class DefaultKafkaConsumerConfig implements KafkaConsumerConfig {
private static final String CONFIG_PATH = "consumer";
private static final String ALPAKKA_PATH = "alpakka";
private static final String RESTART_PATH = "restart";
private final ConnectionThrottlingConfig throttlingConfig;
private final ExponentialBackOffConfig restartBackOffConfig;
private final Config alpakkaConfig;
private final Duration metricCollectingInterval;
private final long initTimeoutSeconds;
private DefaultKafkaConsumerConfig(final Config kafkaConsumerScopedConfig) {
throttlingConfig = ConnectionThrottlingConfig.of(kafkaConsumerScopedConfig);
restartBackOffConfig =
DefaultExponentialBackOffConfig.of(getConfigOrEmpty(kafkaConsumerScopedConfig, RESTART_PATH));
alpakkaConfig = getConfigOrEmpty(kafkaConsumerScopedConfig, ALPAKKA_PATH);
metricCollectingInterval =
kafkaConsumerScopedConfig.getDuration(ConfigValue.METRIC_COLLECTING_INTERVAL.getConfigPath());
if (metricCollectingInterval.isNegative() || metricCollectingInterval.isZero()) {
throw new DittoConfigError("The Kafka consumer metric collecting interval has to be positive.");
}
initTimeoutSeconds = kafkaConsumerScopedConfig.getLong(ConfigValue.INIT_TIMEOUT_SECONDS.getConfigPath());
}
/**
* Returns an instance of {@code DefaultKafkaConsumerConfig} based on the settings of the specified Config.
*
* @param config is supposed to provide the Kafka config setting.
* @return the instance.
* @throws org.eclipse.ditto.internal.utils.config.DittoConfigError if {@code config} is invalid.
*/
public static DefaultKafkaConsumerConfig of(final Config config) {
return new DefaultKafkaConsumerConfig(getConfigOrEmpty(config, CONFIG_PATH));
}
private static Config getConfigOrEmpty(final Config config, final String configKey) {
return config.hasPath(configKey) ? config.getConfig(configKey) : ConfigFactory.empty();
}
@Override
public ConnectionThrottlingConfig getThrottlingConfig() {
return throttlingConfig;
}
@Override
public ExponentialBackOffConfig getRestartBackOffConfig() {
return restartBackOffConfig;
}
@Override
public Config getAlpakkaConfig() {
return alpakkaConfig;
}
@Override
public Duration getMetricCollectingInterval() {
return metricCollectingInterval;
}
@Override
public long getInitTimeoutSeconds() {
return initTimeoutSeconds;
}
@Override
public boolean equals(final Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
final DefaultKafkaConsumerConfig that = (DefaultKafkaConsumerConfig) o;
return Objects.equals(throttlingConfig, that.throttlingConfig) &&
Objects.equals(restartBackOffConfig, that.restartBackOffConfig) &&
Objects.equals(alpakkaConfig, that.alpakkaConfig) &&
Objects.equals(metricCollectingInterval, that.metricCollectingInterval) &&
Objects.equals(initTimeoutSeconds, that.initTimeoutSeconds);
}
@Override
public int hashCode() {
return Objects.hash(throttlingConfig, restartBackOffConfig, alpakkaConfig, metricCollectingInterval,
initTimeoutSeconds);
}
@Override
public String toString() {
return getClass().getSimpleName() + " [" +
"throttlingConfig=" + throttlingConfig +
", restartBackOffConfig=" + restartBackOffConfig +
", alpakkaConfig=" + alpakkaConfig +
", metricCollectingInterval=" + metricCollectingInterval +
", initTimeoutSeconds=" + initTimeoutSeconds +
"]";
}
}