org.apache.solr.util.HdfsUtil Maven / Gradle / Ivy
package org.apache.solr.util;
import java.io.File;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.solr.common.SolrException;
import org.apache.solr.common.SolrException.ErrorCode;
/*
* 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.
*/
public class HdfsUtil {
private static final String[] HADOOP_CONF_FILES = {"core-site.xml",
"hdfs-site.xml", "mapred-site.xml", "yarn-site.xml", "hadoop-site.xml"};
public static void addHdfsResources(Configuration conf, String confDir) {
if (confDir != null && confDir.length() > 0) {
File confDirFile = new File(confDir);
if (!confDirFile.exists()) {
throw new SolrException(ErrorCode.SERVER_ERROR, "Resource directory does not exist: " + confDirFile.getAbsolutePath());
}
if (!confDirFile.isDirectory()) {
throw new SolrException(ErrorCode.SERVER_ERROR, "Specified resource directory is not a directory" + confDirFile.getAbsolutePath());
}
if (!confDirFile.canRead()) {
throw new SolrException(ErrorCode.SERVER_ERROR, "Resource directory must be readable by the Solr process: " + confDirFile.getAbsolutePath());
}
for (String file : HADOOP_CONF_FILES) {
if (new File(confDirFile, file).exists()) {
conf.addResource(new Path(confDir, file));
}
}
}
}
}