com.bah.applefox.main.plugins.pageranking.utilities.PRtoFile.java Source code

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Here is the source code for com.bah.applefox.main.plugins.pageranking.utilities.PRtoFile.java

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/**
 * Copyright 2012 Booz Allen Hamilton. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  Booz Allen Hamilton 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 com.bah.applefox.main.plugins.pageranking.utilities;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map.Entry;

import org.apache.accumulo.core.client.AccumuloException;
import org.apache.accumulo.core.client.AccumuloSecurityException;
import org.apache.accumulo.core.client.Scanner;
import org.apache.accumulo.core.client.TableNotFoundException;
import org.apache.accumulo.core.data.Key;
import org.apache.accumulo.core.data.Value;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.bah.applefox.main.plugins.utilities.AccumuloUtils;
import com.bah.applefox.main.plugins.utilities.IngestUtils;

/**
 * This class writes the finished page rank table to a file, used by the search
 * engine component. The table is written to a HashMap<String, Double> which is
 * then written as an object to a file.
 * 
 */
public class PRtoFile {

    private static Log log = LogFactory.getLog(PRtoFile.class);

    private static HashMap<String, Double> createMap(String[] args)
            throws AccumuloException, AccumuloSecurityException, TableNotFoundException {
        HashMap<String, Double> ret = new HashMap<String, Double>();
        String readTable = args[13] + "Old";

        Scanner scan = AccumuloUtils.connectRead(readTable);

        Iterator<Entry<Key, Value>> itr = scan.iterator();

        while (itr.hasNext()) {
            Entry<Key, Value> temp = itr.next();
            try {
                Double val = (Double) IngestUtils.deserialize(temp.getValue().get());
                ret.put(temp.getKey().getRow().toString(), val);
                System.out.println("Adding to Map: " + temp.getKey().getRow().toString() + " with rank: " + val);
            } catch (IOException e) {
                if (e.getMessage() != null) {
                    log.error(e.getMessage());
                } else {
                    log.error(e.getStackTrace());
                }
            } catch (ClassNotFoundException e) {
                if (e.getMessage() != null) {
                    log.error(e.getMessage());
                } else {
                    log.error(e.getStackTrace());
                }
            }
        }

        Double max = 0.0;

        Collection<Double> values = ret.values();

        ArrayList<Double> tempValues = new ArrayList<Double>();
        tempValues.addAll(values);
        Collections.sort(tempValues);
        Collections.reverse(tempValues);

        max = tempValues.get(0);

        ret.put("[[MAX_PR]]", max);

        return ret;
    }

    public static boolean writeToFile(String[] args) {
        String fileName = args[16];
        File f = new File(fileName);
        try {
            f.createNewFile();
            OutputStream file = new FileOutputStream(f);
            OutputStream buffer = new BufferedOutputStream(file);
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(createMap(args));
            out.flush();
            out.close();
        } catch (IOException e) {
            if (e.getMessage() != null) {
                log.error(e.getMessage());
            } else {
                log.error(e.getStackTrace());
            }
            return false;
        } catch (AccumuloException e) {
            if (e.getMessage() != null) {
                log.error(e.getMessage());
            } else {
                log.error(e.getStackTrace());
            }
            return false;
        } catch (AccumuloSecurityException e) {
            if (e.getMessage() != null) {
                log.error(e.getMessage());
            } else {
                log.error(e.getStackTrace());
            }
            return false;
        } catch (TableNotFoundException e) {
            if (e.getMessage() != null) {
                log.error(e.getMessage());
            } else {
                log.error(e.getStackTrace());
            }
            return false;
        }

        return true;

    }
}