gobblin.compliance.restore.ComplianceRestoreJob.java Source code

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Here is the source code for gobblin.compliance.restore.ComplianceRestoreJob.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 gobblin.compliance.restore;

import java.io.IOException;
import java.util.List;
import java.util.Properties;
import java.util.concurrent.Callable;
import java.util.concurrent.CountDownLatch;

import org.apache.commons.lang.exception.ExceptionUtils;
import org.apache.thrift.TException;

import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.google.common.base.Throwables;
import com.google.common.collect.ImmutableMap;
import com.google.common.util.concurrent.FutureCallback;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;

import javax.annotation.Nullable;
import lombok.extern.slf4j.Slf4j;

import gobblin.compliance.ComplianceConfigurationKeys;
import gobblin.compliance.ComplianceEvents;
import gobblin.compliance.ComplianceJob;
import gobblin.compliance.utils.ProxyUtils;
import gobblin.configuration.State;
import gobblin.dataset.Dataset;
import gobblin.dataset.DatasetsFinder;
import gobblin.util.ExecutorsUtils;
import gobblin.util.reflection.GobblinConstructorUtils;

/**
 * Job for restoring {@link gobblin.compliance.HivePartitionDataset} from the backups
 *
 * @author adsharma
 */
@Slf4j
public class ComplianceRestoreJob extends ComplianceJob {

    public ComplianceRestoreJob(Properties properties) {
        super(properties);
        initDatasetFinder(properties);
        try {
            ProxyUtils.cancelTokens(new State(properties));
        } catch (InterruptedException | TException | IOException e) {
            Throwables.propagate(e);
        }
    }

    public void initDatasetFinder(Properties properties) {
        Preconditions.checkArgument(
                properties.containsKey(ComplianceConfigurationKeys.GOBBLIN_COMPLIANCE_DATASET_FINDER_CLASS),
                "Missing required propety " + ComplianceConfigurationKeys.GOBBLIN_COMPLIANCE_DATASET_FINDER_CLASS);
        String finderClass = properties
                .getProperty(ComplianceConfigurationKeys.GOBBLIN_COMPLIANCE_DATASET_FINDER_CLASS);
        this.finder = GobblinConstructorUtils.invokeConstructor(DatasetsFinder.class, finderClass,
                new State(properties));
    }

    public void run() throws IOException {
        Preconditions.checkNotNull(this.finder, "Dataset finder class is not set");
        List<Dataset> datasets = this.finder.findDatasets();
        this.finishCleanSignal = Optional.of(new CountDownLatch(datasets.size()));
        for (final Dataset dataset : datasets) {
            ListenableFuture<Void> future = this.service.submit(new Callable<Void>() {
                @Override
                public Void call() throws Exception {
                    if (dataset instanceof RestorableDataset) {
                        log.info("Trying to restore");
                        ((RestorableDataset) dataset).restore();
                    } else {
                        log.warn("Not an instance of " + RestorableDataset.class + " Dataset won't be restored "
                                + dataset.datasetURN());
                    }
                    return null;
                }
            });
            Futures.addCallback(future, new FutureCallback<Void>() {
                @Override
                public void onSuccess(@Nullable Void result) {
                    ComplianceRestoreJob.this.finishCleanSignal.get().countDown();
                    log.info("Successfully restored: " + dataset.datasetURN());
                }

                @Override
                public void onFailure(Throwable t) {
                    ComplianceRestoreJob.this.finishCleanSignal.get().countDown();
                    log.warn("Exception caught when restoring " + dataset.datasetURN() + ".", t);
                    ComplianceRestoreJob.this.throwables.add(t);
                    ComplianceRestoreJob.this.eventSubmitter.submit(ComplianceEvents.Restore.FAILED_EVENT_NAME,
                            ImmutableMap.of(ComplianceEvents.FAILURE_CONTEXT_METADATA_KEY,
                                    ExceptionUtils.getFullStackTrace(t), ComplianceEvents.DATASET_URN_METADATA_KEY,
                                    dataset.datasetURN()));
                }
            });
        }
    }

    @Override
    public void close() throws IOException {
        try {
            if (this.finishCleanSignal.isPresent()) {
                this.finishCleanSignal.get().await();
            }
            if (!this.throwables.isEmpty()) {
                for (Throwable t : this.throwables) {
                    log.error("Failed restore due to ", t);
                }
                throw new RuntimeException("Restore job failed for one or more datasets");
            }
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            throw new IOException("Not all datasets finish restore job", e);
        } finally {
            ExecutorsUtils.shutdownExecutorService(this.service, Optional.of(log));
            this.closer.close();
        }
    }

    /**
     * Generates restore metrics for the instrumentation of this class.
     */
    protected void regenerateMetrics() {
        // TODO
    }
}