org.apache.flink.runtime.state.gemini.GeminiStateBackendFactory Maven / Gradle / Ivy
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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.flink.runtime.state.gemini;
import org.apache.flink.annotation.PublicEvolving;
import org.apache.flink.configuration.CheckpointingOptions;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.configuration.IllegalConfigurationException;
import org.apache.flink.runtime.state.StateBackendFactory;
import java.io.IOException;
/**
* A factory that creates an {@link GeminiStateBackend} from a configuration.
*/
@PublicEvolving
public class GeminiStateBackendFactory implements StateBackendFactory {
@Override
public GeminiStateBackend createFromConfig(Configuration config)
throws IllegalConfigurationException, IOException {
// we need to explicitly read the checkpoint directory here, because that
// is a required constructor parameter
final String checkpointDirURI = config.getString(CheckpointingOptions.CHECKPOINTS_DIRECTORY);
if (checkpointDirURI == null) {
throw new IllegalConfigurationException(
"Cannot create the RocksDB state backend: The configuration does not specify the " +
"checkpoint directory '" + CheckpointingOptions.CHECKPOINTS_DIRECTORY.key() + '\'');
}
return new GeminiStateBackend(checkpointDirURI).configure(config);
}
}