dev.responsive.kafka.internal.config.ResponsiveStreamsConfig Maven / Gradle / Ivy
/*
*
* * Copyright 2023 Responsive Computing, Inc.
* *
* * 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 dev.responsive.kafka.internal.config;
import static dev.responsive.kafka.api.config.ResponsiveConfig.NUM_STANDBYS_OVERRIDE;
import java.util.Map;
import org.apache.kafka.common.config.ConfigException;
import org.apache.kafka.streams.StreamsConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ResponsiveStreamsConfig extends StreamsConfig {
private static final Logger LOG = LoggerFactory.getLogger(ResponsiveStreamsConfig.class);
/**
* NOTE: always use this to create instances of {@link StreamsConfig} instead of creating
* them directly, to avoid unnecessarily logging the config over and over. The StreamsConfig
* will be logged when we invoke the {@link org.apache.kafka.streams.KafkaStreams} constructor,
* so we should never log it ourselves.
*/
public static ResponsiveStreamsConfig streamsConfig(final Map props) {
return new ResponsiveStreamsConfig(props, false);
}
public static void validateStreamsConfig(final StreamsConfig streamsConfig) {
verifyNoStandbys(streamsConfig);
verifyNotEosV1(streamsConfig);
}
static void verifyNoStandbys(final StreamsConfig config) throws ConfigException {
// In this case the default and our desired value are both 0, so we only need to check for
// accidental user overrides
final int numStandbys = config.getInt(StreamsConfig.NUM_STANDBY_REPLICAS_CONFIG);
if (numStandbys != 0) {
final String errorMsg = String.format(
"Invalid Streams configuration value for '%s': got %d, expected '%d'",
StreamsConfig.NUM_STANDBY_REPLICAS_CONFIG,
numStandbys,
NUM_STANDBYS_OVERRIDE
);
LOG.error(errorMsg);
throw new ConfigException(errorMsg);
}
}
@SuppressWarnings("deprecation")
static void verifyNotEosV1(final StreamsConfig config) throws ConfigException {
if (EXACTLY_ONCE.equals(config.getString(StreamsConfig.PROCESSING_GUARANTEE_CONFIG))) {
throw new ConfigException("Responsive driver can only be used with ALOS/EOS-V2");
}
}
private ResponsiveStreamsConfig(final Map props, final boolean logConfigs) {
super(props, logConfigs);
}
}