org.apache.beam.sdk.io.common.FileBasedIOITHelper.java Source code

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Here is the source code for org.apache.beam.sdk.io.common.FileBasedIOITHelper.java

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/*
 * 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.beam.sdk.io.common;

import static org.apache.beam.sdk.io.common.IOITHelper.getHashForRecordCount;

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Iterables;
import java.io.IOException;
import java.util.Collections;
import java.util.Date;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.apache.beam.sdk.io.FileSystems;
import org.apache.beam.sdk.io.fs.MatchResult;
import org.apache.beam.sdk.io.fs.ResourceId;
import org.apache.beam.sdk.transforms.DoFn;

/** Contains helper methods for file based IO Integration tests. */
public class FileBasedIOITHelper {

    private FileBasedIOITHelper() {
    }

    public static FileBasedIOTestPipelineOptions readFileBasedIOITPipelineOptions() {
        return IOITHelper.readIOTestPipelineOptions(FileBasedIOTestPipelineOptions.class);
    }

    public static String appendTimestampSuffix(String text) {
        return String.format("%s_%s", text, new Date().getTime());
    }

    public static String getExpectedHashForLineCount(int lineCount) {
        Map<Integer, String> expectedHashes = ImmutableMap.of(1000, "8604c70b43405ef9803cb49b77235ea2", 100_000,
                "4c8bb3b99dcc59459b20fefba400d446", 1_000_000, "9796db06e7a7960f974d5a91164afff1", 100_000_000,
                "6ce05f456e2fdc846ded2abd0ec1de95");

        return getHashForRecordCount(lineCount, expectedHashes);
    }

    /** Constructs text lines in files used for testing. */
    public static class DeterministicallyConstructTestTextLineFn extends DoFn<Long, String> {

        @ProcessElement
        public void processElement(ProcessContext c) {
            c.output(String.format("IO IT Test line of text. Line seed: %s", c.element()));
        }
    }

    /** Deletes matching files using the FileSystems API. */
    public static class DeleteFileFn extends DoFn<String, Void> {

        @ProcessElement
        public void processElement(ProcessContext c) throws IOException {
            MatchResult match = Iterables.getOnlyElement(FileSystems.match(Collections.singletonList(c.element())));

            Set<ResourceId> resourceIds = new HashSet<>();
            for (MatchResult.Metadata metadataElem : match.metadata()) {
                resourceIds.add(metadataElem.resourceId());
            }

            FileSystems.delete(resourceIds);
        }
    }
}