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@ -1,18 +1,29 @@
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package eu.dnetlib.dhp.utils;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.*;
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import java.nio.charset.StandardCharsets;
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import java.security.MessageDigest;
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import java.util.List;
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import java.util.Map;
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import java.util.Properties;
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import java.util.zip.GZIPInputStream;
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import java.util.zip.GZIPOutputStream;
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import org.apache.commons.codec.binary.Base64;
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import org.apache.commons.codec.binary.Base64OutputStream;
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import org.apache.commons.codec.binary.Hex;
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import org.apache.commons.io.IOUtils;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.fs.Path;
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import org.apache.spark.sql.Dataset;
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import org.apache.spark.sql.SaveMode;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.google.common.collect.Maps;
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import com.jayway.jsonpath.JsonPath;
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import net.minidev.json.JSONArray;
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@ -21,6 +32,8 @@ import scala.collection.Seq;
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public class DHPUtils {
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private static final Logger log = LoggerFactory.getLogger(DHPUtils.class);
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public static Seq<String> toSeq(List<String> list) {
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return JavaConverters.asScalaIteratorConverter(list.iterator()).asScala().toSeq();
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}
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@ -79,4 +92,72 @@ public class DHPUtils {
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return "";
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}
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}
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public static final ObjectMapper MAPPER = new ObjectMapper();
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public static void writeHdfsFile(final Configuration conf, final String content, final String path)
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throws IOException {
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log.info("writing file {}, size {}", path, content.length());
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try (FileSystem fs = FileSystem.get(conf);
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BufferedOutputStream os = new BufferedOutputStream(fs.create(new Path(path)))) {
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os.write(content.getBytes(StandardCharsets.UTF_8));
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os.flush();
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}
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}
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public static String readHdfsFile(Configuration conf, String path) throws IOException {
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log.info("reading file {}", path);
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try (FileSystem fs = FileSystem.get(conf)) {
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final Path p = new Path(path);
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if (!fs.exists(p)) {
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throw new FileNotFoundException(path);
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}
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return IOUtils.toString(fs.open(p));
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}
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}
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public static <T> T readHdfsFileAs(Configuration conf, String path, Class<T> clazz) throws IOException {
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return MAPPER.readValue(readHdfsFile(conf, path), clazz);
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}
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public static <T> void saveDataset(final Dataset<T> mdstore, final String targetPath) {
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log.info("saving dataset in: {}", targetPath);
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mdstore
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.write()
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.mode(SaveMode.Overwrite)
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.format("parquet")
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.save(targetPath);
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}
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public static Configuration getHadoopConfiguration(String nameNode) {
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// ====== Init HDFS File System Object
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Configuration conf = new Configuration();
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// Set FileSystem URI
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conf.set("fs.defaultFS", nameNode);
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// Because of Maven
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conf.set("fs.hdfs.impl", org.apache.hadoop.hdfs.DistributedFileSystem.class.getName());
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conf.set("fs.file.impl", org.apache.hadoop.fs.LocalFileSystem.class.getName());
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System.setProperty("hadoop.home.dir", "/");
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return conf;
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}
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public static void populateOOZIEEnv(final Map<String, String> report) throws IOException {
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File file = new File(System.getProperty("oozie.action.output.properties"));
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Properties props = new Properties();
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report.forEach((k, v) -> props.setProperty(k, v));
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try (OutputStream os = new FileOutputStream(file)) {
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props.store(os, "");
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}
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}
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public static void populateOOZIEEnv(final String paramName, String value) throws IOException {
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Map<String, String> report = Maps.newHashMap();
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report.put(paramName, value);
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populateOOZIEEnv(report);
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}
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}
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