org.apache.hadoop.chukwa.database.DataExpiration.java Source code

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Here is the source code for org.apache.hadoop.chukwa.database.DataExpiration.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.hadoop.chukwa.database;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.chukwa.util.DatabaseWriter;

public class DataExpiration {
    private static DatabaseConfig dbc = null;
    private static Log log = LogFactory.getLog(DataExpiration.class);

    public DataExpiration() {
        if (dbc == null) {
            dbc = new DatabaseConfig();
        }
    }

    public void dropTables(long start, long end) {
        String cluster = System.getProperty("CLUSTER");
        if (cluster == null) {
            cluster = "unknown";
        }
        DatabaseWriter dbw = new DatabaseWriter(cluster);
        try {
            HashMap<String, String> dbNames = dbc.startWith("report.db.name.");
            Iterator<String> ki = dbNames.keySet().iterator();
            while (ki.hasNext()) {
                String name = ki.next();
                String tableName = dbNames.get(name);
                String[] tableList = dbc.findTableName(tableName, start, end);
                for (String tl : tableList) {
                    log.debug("table name: " + tableList[0]);
                    try {
                        String[] parts = tl.split("_");
                        int partition = Integer.parseInt(parts[parts.length - 2]);
                        String table = "";
                        for (int i = 0; i < parts.length - 2; i++) {
                            if (i != 0) {
                                table = table + "_";
                            }
                            table = table + parts[i];
                        }
                        partition = partition - 3;
                        String dropPartition = "drop table if exists " + table + "_" + partition + "_"
                                + parts[parts.length - 1];
                        dbw.execute(dropPartition);
                        partition--;
                        if (partition >= 0) {
                            dropPartition = "drop table if exists " + table + "_" + partition + "_"
                                    + parts[parts.length - 1];
                            dbw.execute(dropPartition);
                        }
                    } catch (NumberFormatException e) {
                        log.error("Error in parsing table partition number, skipping table:" + tableList[0]);
                    } catch (ArrayIndexOutOfBoundsException e) {
                        log.debug(
                                "Skipping table:" + tableList[0] + ", because it has no partition configuration.");
                    }
                }
            }
            dbw.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void usage() {
        System.out.println("DataExpiration usage:");
        System.out.println(
                "java -jar chukwa-core.jar org.apache.hadoop.chukwa.DataExpiration <date> <time window size>");
        System.out.println("     date format: YYYY-MM-DD");
        System.out.println("     time window size: 7, 30, 91, 365");
    }

    public static void main(String[] args) {
        DataExpiration de = new DataExpiration();
        long now = (new Date()).getTime();
        long start = now;
        long end = now;
        if (args.length == 2) {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            try {
                long dataExpStart = Calendar.getInstance().getTimeInMillis();
                start = sdf.parse(args[0]).getTime();
                end = start + (Long.parseLong(args[1]) * 1440 * 60 * 1000L);
                de.dropTables(start, end);
                long dataExpEnd = Calendar.getInstance().getTimeInMillis();
                log.info("DataExpiration for: " + args[0] + " " + args[1] + " finished: ("
                        + (double) (dataExpEnd - dataExpStart) / 1000 + " seconds)");
            } catch (Exception e) {
                usage();
            }
        } else {
            usage();
        }
    }
}