org.apache.beam.sdk.io.aws.sqs.SqsUnboundedSource.java Source code

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Here is the source code for org.apache.beam.sdk.io.aws.sqs.SqsUnboundedSource.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.aws.sqs;

import com.amazonaws.services.sqs.AmazonSQS;
import com.amazonaws.services.sqs.AmazonSQSClientBuilder;
import com.amazonaws.services.sqs.model.Message;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.Nullable;
import org.apache.beam.sdk.coders.Coder;
import org.apache.beam.sdk.coders.SerializableCoder;
import org.apache.beam.sdk.io.UnboundedSource;
import org.apache.beam.sdk.io.aws.sqs.SqsIO.Read;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Supplier;
import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Suppliers;

class SqsUnboundedSource extends UnboundedSource<Message, SqsCheckpointMark> {

    private final Read read;
    private final SqsConfiguration sqsConfiguration;
    private final Supplier<AmazonSQS> sqs;

    public SqsUnboundedSource(Read read, SqsConfiguration sqsConfiguration) {
        this.read = read;
        this.sqsConfiguration = sqsConfiguration;

        sqs = Suppliers.memoize((Supplier<AmazonSQS> & Serializable) () -> AmazonSQSClientBuilder.standard()
                .withClientConfiguration(sqsConfiguration.getClientConfiguration())
                .withCredentials(sqsConfiguration.getAwsCredentialsProvider())
                .withRegion(sqsConfiguration.getAwsRegion()).build());
    }

    @Override
    public List<SqsUnboundedSource> split(int desiredNumSplits, PipelineOptions options) {
        List<SqsUnboundedSource> sources = new ArrayList<>();
        for (int i = 0; i < Math.max(1, desiredNumSplits); ++i) {
            sources.add(new SqsUnboundedSource(read, sqsConfiguration));
        }
        return sources;
    }

    @Override
    public UnboundedReader<Message> createReader(PipelineOptions options,
            @Nullable SqsCheckpointMark checkpointMark) {
        return new SqsUnboundedReader(this, checkpointMark);
    }

    @Override
    public Coder<SqsCheckpointMark> getCheckpointMarkCoder() {
        return SerializableCoder.of(SqsCheckpointMark.class);
    }

    @Override
    public Coder<Message> getOutputCoder() {
        return SerializableCoder.of(Message.class);
    }

    public Read getRead() {
        return read;
    }

    public AmazonSQS getSqs() {
        return sqs.get();
    }

    @Override
    public boolean requiresDeduping() {
        return true;
    }
}