org.apache.beam.runners.dataflow.worker.IsmSinkFactory.java Source code

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Here is the source code for org.apache.beam.runners.dataflow.worker.IsmSinkFactory.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.runners.dataflow.worker;

import static com.google.common.base.Preconditions.checkArgument;
import static org.apache.beam.runners.dataflow.util.Structs.getString;

import com.google.auto.service.AutoService;
import com.google.common.collect.ImmutableMap;
import com.google.common.math.DoubleMath;
import java.math.RoundingMode;
import java.util.Map;
import javax.annotation.Nullable;
import org.apache.beam.runners.dataflow.internal.IsmFormat.IsmRecord;
import org.apache.beam.runners.dataflow.internal.IsmFormat.IsmRecordCoder;
import org.apache.beam.runners.dataflow.options.DataflowWorkerHarnessOptions;
import org.apache.beam.runners.dataflow.util.CloudObject;
import org.apache.beam.runners.dataflow.worker.util.WorkerPropertyNames;
import org.apache.beam.runners.dataflow.worker.util.common.worker.Sink;
import org.apache.beam.sdk.coders.Coder;
import org.apache.beam.sdk.io.FileSystems;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.util.WindowedValue;
import org.apache.beam.sdk.util.WindowedValue.WindowedValueCoder;

/**
 * Creates an {@link IsmSink} from a {@link CloudObject} spec. Note that it is invalid to use a non
 * {@link IsmRecordCoder} with this sink factory.
 */
public class IsmSinkFactory implements SinkFactory {

    /** A {@link SinkFactory.Registrar} for ISM sinks. */
    @AutoService(SinkFactory.Registrar.class)
    public static class Registrar implements SinkFactory.Registrar {

        @Override
        public Map<String, SinkFactory> factories() {
            IsmSinkFactory factory = new IsmSinkFactory();
            return ImmutableMap.of("IsmSink", factory, "org.apache.beam.runners.dataflow.worker.IsmSink", factory);
        }
    }

    // Limit Bloom filters to be at most 0.1% of the worker cache size each
    private static final double BLOOM_FILTER_SIZE_LIMIT_MULTIPLIER = 0.001;
    private static final long MIN_BLOOM_FILTER_SIZE_BYTES = 128L;

    @Override
    public Sink<?> create(CloudObject spec, Coder<?> coder, PipelineOptions options,
            @Nullable DataflowExecutionContext executionContext, DataflowOperationContext operationContext)
            throws Exception {

        // The validity of this coder is checked in detail by the typed create, below
        @SuppressWarnings("unchecked")
        Coder<WindowedValue<IsmRecord<Object>>> typedCoder = (Coder<WindowedValue<IsmRecord<Object>>>) coder;

        String filename = getString(spec, WorkerPropertyNames.FILENAME);

        checkArgument(typedCoder instanceof WindowedValueCoder, "%s only supports using %s but got %s.",
                IsmSink.class, WindowedValueCoder.class, typedCoder);
        WindowedValueCoder<IsmRecord<Object>> windowedCoder = (WindowedValueCoder<IsmRecord<Object>>) typedCoder;

        checkArgument(windowedCoder.getValueCoder() instanceof IsmRecordCoder,
                "%s only supports using %s but got %s.", IsmSink.class, IsmRecordCoder.class,
                windowedCoder.getValueCoder());
        @SuppressWarnings("unchecked")
        IsmRecordCoder<Object> ismCoder = (IsmRecordCoder<Object>) windowedCoder.getValueCoder();

        long bloomFilterSizeLimitBytes = Math.max(MIN_BLOOM_FILTER_SIZE_BYTES,
                DoubleMath.roundToLong(BLOOM_FILTER_SIZE_LIMIT_MULTIPLIER
                        * options.as(DataflowWorkerHarnessOptions.class).getWorkerCacheMb()
                        // Note the conversion from MiB to bytes
                        * 1024 * 1024, RoundingMode.DOWN));

        return new IsmSink<>(FileSystems.matchNewResource(filename, false), ismCoder, bloomFilterSizeLimitBytes);
    }
}