gobblin.ingestion.google.webmaster.TrieBasedProducerJob.java Source code

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Here is the source code for gobblin.ingestion.google.webmaster.TrieBasedProducerJob.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.ingestion.google.webmaster;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang3.tuple.Triple;

public class TrieBasedProducerJob extends ProducerJob {
    private final String _startDate;
    private final String _endDate;
    private final int _groupSize;
    private final Triple<String, GoogleWebmasterFilter.FilterOperator, UrlTrieNode> _jobNode;

    TrieBasedProducerJob(String startDate, String endDate,
            Triple<String, GoogleWebmasterFilter.FilterOperator, UrlTrieNode> jobNode, int groupSize) {
        _startDate = startDate;
        _endDate = endDate;
        _jobNode = jobNode;
        _groupSize = groupSize;
    }

    @Override
    public String getPage() {
        return _jobNode.getLeft();
    }

    @Override
    public String getStartDate() {
        return _startDate;
    }

    @Override
    public String getEndDate() {
        return _endDate;
    }

    @Override
    public GoogleWebmasterFilter.FilterOperator getOperator() {
        return _jobNode.getMiddle();
    }

    @Override
    public int getPagesSize() {
        if (isOperatorEquals()) {
            return 1;
        } else {
            return _jobNode.getRight().getSize();
        }
    }

    /**
     * The implementation here will first partition the job by pages, and then by dates.
     * @return
     */
    @Override
    public List<? extends ProducerJob> partitionJobs() {
        UrlTrieNode root = _jobNode.getRight();
        if (isOperatorEquals() || root.getSize() == 1) {
            //Either at an Equals-Node or a Leaf-Node, both of which actually has actual size 1.
            return super.partitionJobs();
        } else {
            if (_groupSize <= 1) {
                throw new RuntimeException("This is impossible. When group size is 1, the operator must be equals");
            }

            UrlTrie trie = new UrlTrie(getPage(), root);
            int gs = Math.min(root.getSize(), _groupSize);

            UrlTriePrefixGrouper grouper = new UrlTriePrefixGrouper(trie, (int) Math.ceil(gs / 2.0));

            List<TrieBasedProducerJob> jobs = new ArrayList<>();
            while (grouper.hasNext()) {
                jobs.add(new TrieBasedProducerJob(_startDate, _endDate, grouper.next(), grouper.getGroupSize()));
            }
            return jobs;
        }
    }

    private boolean isOperatorEquals() {
        return getOperator().equals(GoogleWebmasterFilter.FilterOperator.EQUALS);
    }

    @Override
    public String toString() {
        return String.format(
                "TrieBasedProducerJob{_page='%s', _startDate='%s', _endDate='%s', _operator='%s', _groupSize='%s', _nodeSize='%s'}",
                getPage(), _startDate, _endDate, getOperator(), _groupSize, _jobNode.getRight().getSize());
    }

    public int getGroupSize() {
        return _groupSize;
    }
}