/*
* Ivory: A Hadoop toolkit for web-scale information retrieval
*
* 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 ivory.core.driver;
import ivory.core.Constants;
import ivory.core.index.BuildIPInvertedIndexDocSorted;
import ivory.core.index.BuildIntPostingsForwardIndex;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.apache.log4j.Logger;
public class BuildIPIndex extends Configured implements Tool {
private static final Logger LOG = Logger.getLogger(BuildIPIndex.class);
private static int printUsage() {
System.out.println("usage: [index-path] [num-of-reducers]");
ToolRunner.printGenericCommandUsage(System.out);
return -1;
}
/**
* Runs this tool.
*/
public int run(String[] args) throws Exception {
if (args.length != 2) {
printUsage();
return -1;
}
Configuration conf = getConf();
FileSystem fs = FileSystem.get(conf);
String indexPath = args[0];
Path p = new Path(indexPath);
if (!fs.exists(p)) {
LOG.warn("Index path doesn't exist...");
return -1;
}
int numReducers = Integer.parseInt(args[1]);
LOG.info("Tool name: " + BuildIPIndex.class.getCanonicalName());
LOG.info(" - Index path: " + indexPath);
conf.set(Constants.IndexPath, indexPath);
conf.setInt(Constants.NumReduceTasks, numReducers);
BuildIPInvertedIndexDocSorted indexTool = new BuildIPInvertedIndexDocSorted(conf);
indexTool.run();
BuildIntPostingsForwardIndex postingsIndexer = new BuildIntPostingsForwardIndex(conf);
postingsIndexer.run();
return 0;
}
/**
* Dispatches command-line arguments to the tool via the {@code ToolRunner}.
*/
public static void main(String[] args) throws Exception {
ToolRunner.run(new Configuration(), new BuildIPIndex(), args);
}
}