From 4fa5671d16006f9afafb1e58361bf65e349f81bd Mon Sep 17 00:00:00 2001 From: "michele.artini" Date: Thu, 27 May 2021 16:22:07 +0200 Subject: [PATCH] first implementation of Hdfs Mdstores Importer --- .../raw/MigrateHdfsMdstoresApplication.java | 120 ++++++++++++++++++ .../migrate_hdfs_mstores_parameters.json | 32 +++++ 2 files changed, 152 insertions(+) create mode 100644 dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/MigrateHdfsMdstoresApplication.java create mode 100644 dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/migrate_hdfs_mstores_parameters.json diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/MigrateHdfsMdstoresApplication.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/MigrateHdfsMdstoresApplication.java new file mode 100644 index 000000000..b261b5e76 --- /dev/null +++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/MigrateHdfsMdstoresApplication.java @@ -0,0 +1,120 @@ + +package eu.dnetlib.dhp.oa.graph.raw; + +import static eu.dnetlib.dhp.common.SparkSessionSupport.runWithSparkSession; + +import java.util.Arrays; +import java.util.Optional; +import java.util.Set; +import java.util.stream.Collectors; + +import org.apache.commons.io.IOUtils; +import org.apache.commons.lang3.StringUtils; +import org.apache.http.client.methods.CloseableHttpResponse; +import org.apache.http.client.methods.HttpGet; +import org.apache.http.impl.client.CloseableHttpClient; +import org.apache.http.impl.client.HttpClients; +import org.apache.spark.SparkConf; +import org.apache.spark.api.java.JavaSparkContext; +import org.apache.spark.api.java.function.MapFunction; +import org.apache.spark.sql.Encoders; +import org.apache.spark.sql.Row; +import org.apache.spark.sql.SparkSession; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import com.fasterxml.jackson.databind.ObjectMapper; + +import eu.dnetlib.dhp.application.ArgumentApplicationParser; +import eu.dnetlib.dhp.common.HdfsSupport; +import eu.dnetlib.dhp.oa.graph.raw.common.AbstractMigrationApplication; +import eu.dnetlib.dhp.schema.mdstore.MDStoreWithInfo; + +public class MigrateHdfsMdstoresApplication extends AbstractMigrationApplication { + + private static final Logger log = LoggerFactory.getLogger(MigrateHdfsMdstoresApplication.class); + + private final String mdstoreManagerUrl; + + private final String format; + + private final String layout; + + private final String interpretation; + + public static void main(final String[] args) throws Exception { + final ArgumentApplicationParser parser = new ArgumentApplicationParser( + IOUtils + .toString(MigrateHdfsMdstoresApplication.class + .getResourceAsStream("/eu/dnetlib/dhp/oa/graph/migrate_hdfs_mstores_parameters.json"))); + parser.parseArgument(args); + + final Boolean isSparkSessionManaged = Optional + .ofNullable(parser.get("isSparkSessionManaged")) + .map(Boolean::valueOf) + .orElse(Boolean.TRUE); + log.info("isSparkSessionManaged: {}", isSparkSessionManaged); + + final String mdstoreManagerUrl = parser.get("mdstoreManagerUrl"); + final String mdFormat = parser.get("mdFormat"); + final String mdLayout = parser.get("mdLayout"); + final String mdInterpretation = parser.get("mdInterpretation"); + + final String hdfsPath = parser.get("hdfsPath"); + + final SparkConf conf = new SparkConf(); + runWithSparkSession(conf, isSparkSessionManaged, spark -> { + try (final MigrateHdfsMdstoresApplication app = + new MigrateHdfsMdstoresApplication(hdfsPath, mdstoreManagerUrl, mdFormat, mdLayout, mdInterpretation)) { + app.execute(spark); + } + }); + } + + public MigrateHdfsMdstoresApplication(final String hdfsPath, final String mdstoreManagerUrl, final String format, final String layout, + final String interpretation) throws Exception { + super(hdfsPath); + this.mdstoreManagerUrl = mdstoreManagerUrl; + this.format = format; + this.layout = layout; + this.interpretation = interpretation; + } + + public void execute(final SparkSession spark) throws Exception { + + final JavaSparkContext sc = JavaSparkContext.fromSparkContext(spark.sparkContext()); + + final Set paths = mdstorePaths(sc); + log.info("Found " + paths.size() + " not empty mdstores"); + + spark.read() + .parquet(paths.toArray(new String[paths.size()])) + .map((MapFunction) r -> r.getAs("body"), Encoders.STRING()) + .foreach(xml -> emit(xml, String.format("%s-%s-%s", format, layout, interpretation))); + } + + private Set mdstorePaths(final JavaSparkContext sc) throws Exception { + final String url = mdstoreManagerUrl + "/mdstores"; + final ObjectMapper objectMapper = new ObjectMapper(); + + final HttpGet req = new HttpGet(url); + + try (final CloseableHttpClient client = HttpClients.createDefault()) { + try (final CloseableHttpResponse response = client.execute(req)) { + final String json = IOUtils.toString(response.getEntity().getContent()); + final MDStoreWithInfo[] mdstores = objectMapper.readValue(json, MDStoreWithInfo[].class); + return Arrays.stream(mdstores) + .filter(md -> md.getFormat().equalsIgnoreCase(format)) + .filter(md -> md.getLayout().equalsIgnoreCase(layout)) + .filter(md -> md.getInterpretation().equalsIgnoreCase(interpretation)) + .filter(md -> StringUtils.isNotBlank(md.getHdfsPath())) + .filter(md -> StringUtils.isNotBlank(md.getCurrentVersion())) + .filter(md -> md.getSize() > 0) + .map(md -> md.getHdfsPath() + "/" + md.getCurrentVersion() + "/store") + .filter(p -> HdfsSupport.exists(p, sc.hadoopConfiguration())) + .collect(Collectors.toSet()); + } + } + } + +} diff --git a/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/migrate_hdfs_mstores_parameters.json b/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/migrate_hdfs_mstores_parameters.json new file mode 100644 index 000000000..1d89017c5 --- /dev/null +++ b/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/migrate_hdfs_mstores_parameters.json @@ -0,0 +1,32 @@ +[ + { + "paramName": "p", + "paramLongName": "hdfsPath", + "paramDescription": "the path where storing the sequential file", + "paramRequired": true + }, + { + "paramName": "u", + "paramLongName": "mdstoreManagerUrl", + "paramDescription": "the MdstoreManager url", + "paramRequired": true + }, + { + "paramName": "f", + "paramLongName": "mdFormat", + "paramDescription": "metadata format", + "paramRequired": true + }, + { + "paramName": "l", + "paramLongName": "mdLayout", + "paramDescription": "metadata layout", + "paramRequired": true + }, + { + "paramName": "i", + "paramLongName": "mdInterpretation", + "paramDescription": "metadata interpretation", + "paramRequired": true + } +] \ No newline at end of file