io.mantisrx.server.agent.FileSystemInitializer Maven / Gradle / Ivy
/*
* Copyright 2022 Netflix, 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 io.mantisrx.server.agent;
import java.io.IOException;
import java.net.URI;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.ServiceLoader;
import lombok.extern.slf4j.Slf4j;
import org.apache.hadoop.fs.FileSystem;
@Slf4j
public class FileSystemInitializer {
private static final Map FS_FACTORIES = new HashMap<>();
static {
FileSystemInitializer.initialize();
}
/**
* initialize needs to be called at the start of the JVM.
*/
public static void initialize() {
FS_FACTORIES.clear();
// let's get all the registered implementations
Iterator fileSystemFactoryIterator =
ServiceLoader.load(FileSystemFactory.class).iterator();
fileSystemFactoryIterator.forEachRemaining(fileSystemFactory -> {
log.info("Initializing FileSystem Factory {}", fileSystemFactory);
FS_FACTORIES.putIfAbsent(fileSystemFactory.getScheme(), fileSystemFactory);
});
}
public static FileSystem create(URI fsUri) throws IOException {
FileSystemFactory factory = FS_FACTORIES.get(fsUri.getScheme());
if (factory != null) {
return factory.create(fsUri);
} else {
throw new IllegalArgumentException(
String.format("Unknown schema %s", fsUri.getScheme()));
}
}
}