com.google.cloud.tools.managedcloudsdk.install.Extractor.java Source code

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Here is the source code for com.google.cloud.tools.managedcloudsdk.install.Extractor.java

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/*
 * Copyright 2017 Google LLC.
 *
 * 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 com.google.cloud.tools.managedcloudsdk.install;

import com.google.cloud.tools.managedcloudsdk.ProgressListener;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.io.MoreFiles;
import com.google.common.io.RecursiveDeleteOption;
import java.io.IOException;
import java.nio.file.Path;
import java.util.logging.Logger;

/**
 * Extractor for extracting files from a single archive. Use {@link ExtractorProvider} to provide
 * extractor implementation.
 */
final class Extractor {

    private final Logger logger = Logger.getLogger(Extractor.class.getName());

    private final Path archive;
    private final Path destination;
    private final ExtractorProvider extractorProvider;
    private final ProgressListener progressListener;

    /** Use {@link ExtractorFactory} to instantiate. */
    Extractor(Path archive, Path destination, ExtractorProvider extractorProvider,
            ProgressListener progressListener) {
        this.archive = archive;
        this.destination = destination;
        this.extractorProvider = extractorProvider;
        this.progressListener = progressListener;
    }

    /** Extract an archive. */
    public void extract() throws IOException, InterruptedException {

        try {
            extractorProvider.extract(archive, destination, progressListener);
        } catch (IOException ex) {
            try {
                logger.warning("Extraction failed, cleaning up " + destination);
                cleanUp(destination);
            } catch (IOException exx) {
                logger.warning("Failed to cleanup directory");
            }
            // intentional rethrow after cleanup
            throw ex;
        }

        // we do not allow interrupt mid extraction, so catch it here, we still end up
        // with a valid directory though, so don't clean it up.
        if (Thread.currentThread().isInterrupted()) {
            logger.warning("Process was interrupted");
            throw new InterruptedException("Process was interrupted");
        }
    }

    @VisibleForTesting
    ExtractorProvider getExtractorProvider() {
        return extractorProvider;
    }

    private void cleanUp(final Path target) throws IOException {
        MoreFiles.deleteRecursively(target, RecursiveDeleteOption.ALLOW_INSECURE);
    }
}