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/**
* DataCleaner (community edition)
* Copyright (C) 2014 Neopost - Customer Information Management
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.datacleaner.spark;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Writer;
import java.net.URI;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.UUID;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.LocatedFileStatus;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.RemoteIterator;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.metamodel.util.FileHelper;
import org.apache.metamodel.util.HdfsResource;
import org.apache.metamodel.util.MutableRef;
import org.apache.spark.launcher.SparkLauncher;
import org.datacleaner.util.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.Strings;
public class ApplicationDriver {
private static final Logger logger = LoggerFactory.getLogger(ApplicationDriver.class);
private static final String[] PRIMARY_JAR_FILENAME_PREFIXES = { "DataCleaner-spark", "DataCleaner-env-spark" };
private final URI _defaultFs;
private final DistributedFileSystem _fileSystem;
private final String _jarDirectoryPath;
private final String _sparkHome;
public ApplicationDriver(final URI uri, final String jarDirectoryPath) throws IOException {
this(uri, jarDirectoryPath, determineSparkHome());
}
public ApplicationDriver(final URI defaultFs, final String jarDirectoryPath, final String sparkHome)
throws IOException {
_defaultFs = defaultFs;
_fileSystem = (DistributedFileSystem) FileSystem.newInstance(_defaultFs, new Configuration());
_jarDirectoryPath = jarDirectoryPath;
_sparkHome = sparkHome;
}
private static String determineSparkHome() {
String sparkHome = System.getProperty("SPARK_HOME");
if (Strings.isNullOrEmpty(sparkHome)) {
sparkHome = System.getenv("SPARK_HOME");
}
if (Strings.isNullOrEmpty(sparkHome)) {
throw new IllegalStateException(
"Could not determine SPARK_HOME. Please set the environment variable, system property or provide it as a "
+ ApplicationDriver.class.getSimpleName() + " constructor argument");
}
return sparkHome;
}
/**
* Launches and waits for the execution of a DataCleaner job on Spark.
*
* @param configurationHdfsPath
* configuration file path (on HDFS)
* @param jobHdfsPath
* job file path (on HDFS)
* @return the exit code of the spark-submit process
* @throws Exception
*/
public int launch(final String configurationHdfsPath, final String jobHdfsPath) throws Exception {
// create hadoop configuration directory
final File hadoopConfDir = createTemporaryHadoopConfDir();
final SparkLauncher sparkLauncher =
createSparkLauncher(hadoopConfDir, configurationHdfsPath, jobHdfsPath, null);
return launch(sparkLauncher);
}
public int launch(final SparkLauncher sparkLauncher) throws Exception {
final Process process = launchProcess(sparkLauncher);
return process.waitFor();
}
public Process launchProcess(final SparkLauncher sparkLauncher) throws IOException {
final Process process = sparkLauncher.launch();
final InputStream errorStream = process.getErrorStream();
startLogger(errorStream);
final InputStream inputStream = process.getInputStream();
startLogger(inputStream);
return process;
}
private void startLogger(final InputStream stream) {
new Thread() {
public void run() {
try (BufferedReader br = new BufferedReader(new InputStreamReader(stream))) {
String line = br.readLine();
while (line != null) {
logger.info(line);
line = br.readLine();
}
br.close();
} catch (final Exception e) {
logger.warn("Logger thread failure: " + e.getMessage(), e);
}
}
}.start();
}
public HdfsResource createResource(final String hdfsPath) {
return new HdfsResource(_defaultFs.resolve(hdfsPath).toString());
}
public SparkLauncher createSparkLauncher(final File hadoopConfDir, final URI configurationHdfsUri,
final URI jobHdfsUri, final URI resultHdfsUri) throws Exception {
return createSparkLauncher(hadoopConfDir, configurationHdfsUri.toString(), jobHdfsUri.toString(),
resultHdfsUri == null ? null : resultHdfsUri.toString());
}
public SparkLauncher createSparkLauncher(final File hadoopConfDir, final String configurationHdfsPath,
final String jobHdfsPath, final String resultHdfsPath) throws Exception {
// mimic env. variables
final Map env = new HashMap<>();
env.put("HADOOP_CONF_DIR", hadoopConfDir.getAbsolutePath());
env.put("YARN_CONF_DIR", hadoopConfDir.getAbsolutePath());
final SparkLauncher sparkLauncher = new SparkLauncher(env);
sparkLauncher.setSparkHome(_sparkHome);
sparkLauncher.setMaster("yarn-cluster");
sparkLauncher.setAppName("DataCleaner");
final MutableRef primaryJar = new MutableRef<>();
final List jars = buildJarFiles(primaryJar);
logger.info("Using JAR files: {}", jars);
for (final String jar : jars) {
sparkLauncher.addJar(jar);
}
sparkLauncher.setMainClass(Main.class.getName());
sparkLauncher.setConf("spark.serializer", "org.apache.spark.serializer.JavaSerializer");
// the primary jar is always the first argument
sparkLauncher.addAppArgs(primaryJar.get());
sparkLauncher.addAppArgs(toHadoopPath(configurationHdfsPath));
sparkLauncher.addAppArgs(toHadoopPath(jobHdfsPath));
if (!StringUtils.isNullOrEmpty(resultHdfsPath)) {
final Properties properties = new Properties();
properties.setProperty("datacleaner.result.hdfs.path", resultHdfsPath);
final File tempFile = File.createTempFile("job-", ".properties");
properties.store(new FileWriter(tempFile), "DataCleaner Spark runner properties");
final URI uri = copyFileToHdfs(tempFile,
_fileSystem.getHomeDirectory().toUri().resolve("temp/" + tempFile.getName()).toString());
sparkLauncher.addAppArgs(uri.toString());
}
return sparkLauncher;
}
private String toHadoopPath(final String path) {
if (URI.create(path).getScheme() != null) {
return path;
}
return _defaultFs.resolve(path).toString();
}
private List buildJarFiles(final MutableRef primaryJarRef) throws IOException {
final List list = new ArrayList<>();
final Path directoryPath = new Path(_jarDirectoryPath);
final RemoteIterator files = _fileSystem.listFiles(directoryPath, false);
while (files.hasNext()) {
final LocatedFileStatus file = files.next();
final Path path = file.getPath();
final String filename = path.getName();
boolean primaryJar = false;
for (final String prefix : PRIMARY_JAR_FILENAME_PREFIXES) {
if (filename.startsWith(prefix)) {
primaryJarRef.set(path.toString());
primaryJar = true;
break;
}
}
if (!primaryJar) {
list.add(path.toString());
}
}
if (primaryJarRef.get() == null) {
throw new IllegalArgumentException(
"Failed to find primary jar (starting with '" + PRIMARY_JAR_FILENAME_PREFIXES[0]
+ "') in JAR file directory: " + _jarDirectoryPath);
}
return list;
}
public File createTemporaryHadoopConfDir() throws IOException {
final File hadoopConfDir =
new File(FileHelper.getTempDir(), "datacleaner_hadoop_conf_" + UUID.randomUUID().toString());
final boolean dirCreated = hadoopConfDir.mkdirs();
assert dirCreated;
createTemporaryHadoopConfFile(hadoopConfDir, "core-site.xml", "core-site-template.xml");
createTemporaryHadoopConfFile(hadoopConfDir, "yarn-site.xml", "yarn-site-template.xml");
logger.debug("Created temporary Hadoop conf dir: {}", hadoopConfDir);
return hadoopConfDir;
}
private void createTemporaryHadoopConfFile(final File hadoopConfDir, final String filename,
final String templateName) throws IOException {
final File coreSiteFile = new File(hadoopConfDir, filename);
try (InputStream inputStream = getClass().getResourceAsStream(templateName)) {
final BufferedReader reader = FileHelper.getBufferedReader(inputStream, FileHelper.UTF_8_ENCODING);
try (Writer writer = FileHelper.getWriter(coreSiteFile)) {
String line = reader.readLine();
while (line != null) {
line = StringUtils.replaceAll(line, "${HDFS_HOSTNAME}", _defaultFs.getHost());
line = StringUtils.replaceAll(line, "${HDFS_PORT}", _defaultFs.getPort() + "");
writer.write(line);
line = reader.readLine();
}
writer.flush();
}
}
}
public URI copyFileToHdfs(final File file, final String hdfsPath) {
return copyFileToHdfs(file, hdfsPath, true);
}
public URI copyFileToHdfs(final File file, final String hdfsPath, final boolean overwrite) {
final HdfsResource hdfsResource = createResource(hdfsPath);
final URI uri = hdfsResource.getHadoopPath().toUri();
final boolean exists = hdfsResource.isExists();
if (!overwrite && exists) {
// no need to copy
logger.debug("Skipping file-copy to {} because file already exists", hdfsPath);
return uri;
}
if (exists) {
logger.info("Overwriting file on HDFS: {}", hdfsPath);
} else {
logger.debug("Copying file to HDFS: {}", hdfsPath);
}
hdfsResource.write(out -> {
final FileInputStream in = new FileInputStream(file);
FileHelper.copy(in, out);
in.close();
});
return uri;
}
}
