ch.epfl.data.squall.ewh.components.DummyComponent.java Source code

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Here is the source code for ch.epfl.data.squall.ewh.components.DummyComponent.java

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/*
 * Copyright (c) 2011-2015 EPFL DATA Laboratory
 * Copyright (c) 2014-2015 The Squall Collaboration (see NOTICE)
 *
 * All rights reserved.
 *
 * 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 ch.epfl.data.squall.ewh.components;

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

import org.apache.commons.lang.ArrayUtils;
import org.apache.log4j.Logger;

import backtype.storm.Config;
import backtype.storm.topology.TopologyBuilder;
import ch.epfl.data.squall.components.Component;
import ch.epfl.data.squall.components.DataSourceComponent;
import ch.epfl.data.squall.ewh.storm_components.DummyBolt;
import ch.epfl.data.squall.expressions.ValueExpression;
import ch.epfl.data.squall.operators.ChainOperator;
import ch.epfl.data.squall.operators.Operator;
import ch.epfl.data.squall.predicates.Predicate;
import ch.epfl.data.squall.storm_components.StormComponent;
import ch.epfl.data.squall.storm_components.synchronization.TopologyKiller;
import ch.epfl.data.squall.types.Type;
import ch.epfl.data.squall.utilities.MyUtilities;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

public class DummyComponent implements Component {
    private static final long serialVersionUID = 1L;
    private static Logger LOG = Logger.getLogger(DummyComponent.class);

    private final String _componentName;

    private long _batchOutputMillis;

    private List<Integer> _hashIndexes;
    private List<ValueExpression> _hashExpressions;

    private final ChainOperator _chain = new ChainOperator();

    private boolean _printOut;
    private boolean _printOutSet;

    private final Component _parent;
    private Component _child;
    private DummyBolt _dummyBolt;

    private List<String> _fullHashList;

    public DummyComponent(Component parent, String componentName) {
        _parent = parent;
        _parent.setChild(this);

        _componentName = componentName;
    }

    @Override
    public DummyComponent add(Operator operator) {
        _chain.addOperator(operator);
        return this;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof Component)
            return _componentName.equals(((Component) obj).getName());
        else
            return false;
    }

    @Override
    public List<DataSourceComponent> getAncestorDataSources() {
        final List<DataSourceComponent> list = new ArrayList<DataSourceComponent>();
        list.addAll(_parent.getAncestorDataSources());
        return list;
    }

    @Override
    public long getBatchOutputMillis() {
        return _batchOutputMillis;
    }

    @Override
    public ChainOperator getChainOperator() {
        return _chain;
    }

    @Override
    public Component getChild() {
        return _child;
    }

    // from StormComponent
    @Override
    public String[] getEmitterIDs() {
        return _dummyBolt.getEmitterIDs();
    }

    @Override
    public List<String> getFullHashList() {
        return _fullHashList;
    }

    @Override
    public List<ValueExpression> getHashExpressions() {
        return _hashExpressions;
    }

    @Override
    public List<Integer> getHashIndexes() {
        return _hashIndexes;
    }

    @Override
    public String getInfoID() {
        return _dummyBolt.getInfoID();
    }

    @Override
    public String getName() {
        return _componentName;
    }

    @Override
    public Component[] getParents() {
        return new Component[] { _parent };
    }

    @Override
    public boolean getPrintOut() {
        return _printOut;
    }

    @Override
    public int hashCode() {
        int hash = 5;
        hash = 47 * hash + (_componentName != null ? _componentName.hashCode() : 0);
        return hash;
    }

    @Override
    public void makeBolts(TopologyBuilder builder, TopologyKiller killer, List<String> allCompNames, Config conf,
            int hierarchyPosition) {

        // by default print out for the last component
        // for other conditions, can be set via setPrintOut
        if (hierarchyPosition == StormComponent.FINAL_COMPONENT && !_printOutSet)
            setPrintOut(true);

        MyUtilities.checkBatchOutput(_batchOutputMillis, _chain.getAggregation(), conf);

        _dummyBolt = new DummyBolt(_parent, this, allCompNames, hierarchyPosition, builder, killer, conf);
    }

    @Override
    public DummyComponent setBatchOutputMillis(long millis) {
        _batchOutputMillis = millis;
        return this;
    }

    @Override
    public void setChild(Component child) {
        _child = child;
    }

    @Override
    public DummyComponent setFullHashList(List<String> fullHashList) {
        _fullHashList = fullHashList;
        return this;
    }

    @Override
    public DummyComponent setHashExpressions(List<ValueExpression> hashExpressions) {
        _hashExpressions = hashExpressions;
        return this;
    }

    @Override
    public DummyComponent setOutputPartKey(List<Integer> hashIndexes) {
        _hashIndexes = hashIndexes;
        return this;
    }

    @Override
    public DummyComponent setOutputPartKey(int... hashIndexes) {
        _hashIndexes = Arrays.asList(ArrayUtils.toObject(hashIndexes));
        return this;
    }

    @Override
    public DummyComponent setPrintOut(boolean printOut) {
        _printOutSet = true;
        _printOut = printOut;
        return this;
    }

    @Override
    public Component setContentSensitiveThetaJoinWrapper(Type wrapper) {
        return this;
    }

}