GcsConcatTest.java

/*
 * 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 org.apache.flink.fs.gcs.common;

import com.google.cloud.hadoop.fs.gcs.GoogleHadoopFileSystem;
import org.apache.flink.configuration.GlobalConfiguration;
import org.apache.flink.runtime.util.HadoopUtils;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.Path;
import org.junit.Before;
import org.junit.Test;

import java.io.IOException;
import java.net.URI;

/**
 * HadoopFileSystem extension for a {@link GcsConcatTest}.
 */
public class GcsConcatTest {

    private static final String bucket_name = "fokko-yolo";
    private static final String path = String.format("gs://%s/", bucket_name);

    private org.apache.hadoop.fs.FileSystem ghfs;

    @Before
    public void beforeTest() throws IOException {
        ghfs = new GoogleHadoopFileSystem();
        final org.apache.hadoop.conf.Configuration conf = HadoopUtils.getHadoopConfiguration(GlobalConfiguration.loadConfiguration());
        ghfs.initialize(URI.create(path), conf);
    }

    @Test
    public void ConcatFiles() throws IOException {
        int parts = 5;
        Path[] paths = new Path[parts];

        for (int i = 0; i < parts; i++) {
            Path p = new Path(path + String.format("file-%s.txt", i));
            try (FSDataOutputStream fs = ghfs.create(p)) {
                fs.write(String.format("Hello world %s", i).getBytes());
            }
            paths[i] = p;
        }

        ghfs.concat(
                new Path(path + "file.txt"),
                paths
        );
    }
}