Use ProcessBuilder and redirected log file for HDFS Extract (#198)

* Use ProcessBuilder and redirected log file for HDFS Extract

* relax urn validation rule

backend-service/app/models/utils/Urn.java

@@ -24,25 +24,41 @@ import play.Logger;
  */
 public class Urn {
   public String urnString;
-  public String storageType;
+  public String datasetType;
   public String schemaName;
   public String abstractObjectName;
 
-  static final String[] stoList = new String[] {"teradata", "hdfs"};
+  static final String[] stoList = new String[] {"teradata", "hdfs", "hive", "dalids", "oracle", "mysql", "pinot"};
-  static final Set<String> storageTypes = new HashSet<String>(Arrays.asList(stoList));
+  static final Set<String> datasetTypes = new HashSet<String>(Arrays.asList(stoList));
 
+  /**
+   * Urn can contain 3 parts
+   *      (1)           (2)           (3)
+   * dataset_type://cluster:port/parent/name
+   * the 2nd part is only used to identify deployed dataset instance
+   * for dataset definition, we only use part (1) + (3)
+   */
   public Urn(String urnString) {
     this.urnString = urnString;
     String[] splitResult = urnString.split(":///");
-    storageType = splitResult[0].toLowerCase();
+    datasetType = splitResult[0].toLowerCase();
     Logger.debug(urnString);
-    switch (storageType) {
+    switch (datasetType) {
-            /* example: hdfs://data/tracking/PageViewEvent -> 'hdfs', '', 'data/tracking/PageViewEvent' */
+      /* example: hdfs:///data/tracking/PageViewEvent -> 'hdfs', '', 'data/tracking/PageViewEvent' */
       case "hdfs": abstractObjectName = "/" + splitResult[1];
         schemaName = "";
         break;
-            /* example: teradata://dwh/dwh_dim/domain_name -> 'teradata', 'dwh/dwh_dim', 'domain_name' */
+      /* example: teradata:///dwh_dim/dim_table_name -> 'teradata', 'dwh_dim', 'dim_table_name'
-      case "teradata": String[] split2 = splitResult[1].split("/");
+      *           hive:///db_name/table_name -> 'hive', 'db_name', 'table_name'
+      * */
+      case "teradata":
+      case "oracle":
+      case "mysql":
+      case "espresso":
+      case "pinot":
+      case "hive":
+      case "dalids":
+        String[] split2 = splitResult[1].split("/");
         abstractObjectName = split2[split2.length-1];
         StringBuffer sb = new StringBuffer();
         if (split2.length > 1) {
@@ -58,23 +74,31 @@ public class Urn {
     }
   }
 
-  public Urn(String storageType, String schemaName, String abstractObjectName) {
+  public Urn(String datasetType, String schemaName, String abstractObjectName) {
-    this.storageType = storageType.toLowerCase();
+    this.datasetType = datasetType.toLowerCase();
     if (schemaName != null)
       this.schemaName = schemaName.toLowerCase();
     this.abstractObjectName = abstractObjectName;
-    switch (this.storageType) {
+    switch (this.datasetType) {
-      case "teradata" : urnString = "teradata:///" + schemaName + "/" + abstractObjectName;
+      case "teradata":
+      case "oracle":
+      case "mysql":
+      case "espresso":
+      case "pinot":
+      case "hive":
+      case "dalids":
+        urnString = this.datasetType + ":///" + schemaName + "/" + abstractObjectName;
         break;
       default: String trimName = abstractObjectName.startsWith("/") ? abstractObjectName.substring(1) : abstractObjectName;
-        urnString = this.storageType + ":///" + trimName;
+        urnString = this.datasetType + ":///" + trimName;
     }
   }
 
   public static boolean validateUrn(String urnString) {
 
     String[] splitResult = urnString.split(":///");
-    if (storageTypes.contains(splitResult[0]) && splitResult.length > 1)
+    if ((datasetTypes.contains(splitResult[0]) || splitResult[0].matches("\\w+")) &&
+        splitResult.length > 1)
       return true;
     return false;
   }

backend-service/build.sbt

@@ -17,10 +17,11 @@ libraryDependencies ++= Seq(
   "org.mockito" % "mockito-core" % "1.9.5",
   "org.quartz-scheduler" % "quartz" % "2.2.1",
   "org.quartz-scheduler" % "quartz-jobs" % "2.2.1",
-  "org.slf4j" % "slf4j-api" % "1.6.6",
+  "org.slf4j" % "slf4j-api" % "1.7.21",
   "org.jasypt" % "jasypt" % "1.9.2",
   "org.apache.kafka" % "kafka_2.10" % "0.10.0.0",
   "org.apache.kafka" % "kafka-clients" % "0.10.0.0"
-)
+).map(_.exclude("log4j", "log4j"))
+ .map(_.exclude("org.slf4j", "slf4j-log4j12"))
 
 play.Project.playJavaSettings

metadata-etl/build.gradle

@@ -15,6 +15,7 @@ configurations {
       dependencySubstitution {
           substitute module('org.slf4j:slf4j-log4j12') with module('ch.qos.logback:logback-classic:1.1.7')
           //prefer 'log4j-over-slf4j' over 'log4j'
+          substitute module('log4j:log4j') with module('org.slf4j:log4j-over-slf4j:1.7.21')
       }
   }
 }

metadata-etl/src/main/java/metadata/etl/dataset/hdfs/HdfsMetadataEtl.java

@@ -19,8 +19,8 @@ import com.jcraft.jsch.ChannelSftp;
 import com.jcraft.jsch.JSch;
 import com.jcraft.jsch.JSchException;
 import com.jcraft.jsch.Session;
-
 import com.jcraft.jsch.SftpException;
+
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.IOException;
@@ -32,8 +32,11 @@ import java.io.StringWriter;
 import java.net.URL;
 import java.util.Properties;
 import java.lang.reflect.*;
-import metadata.etl.EtlJob;
+import java.lang.ProcessBuilder;
+
 import org.apache.commons.io.FileUtils;
+
+import metadata.etl.EtlJob;
 import wherehows.common.Constant;
 
 
@@ -95,20 +98,23 @@ public class HdfsMetadataEtl extends EtlJob {
     String numOfThread = prop.getProperty(Constant.HDFS_NUM_OF_THREAD_KEY, String.valueOf(1));
     String hdfsUser = prop.getProperty(Constant.HDFS_REMOTE_USER_KEY);
     String hdfsKeyTab = prop.getProperty(Constant.HDFS_REMOTE_KEYTAB_LOCATION_KEY);
+    String hdfsExtractLogFile = outputSchemaFile + ".log";
 
-    String execCmd =
+    String[] hadoopCmd = {"hadoop", "jar", remoteJarFile,
-            "hadoop jar " + remoteJarFile
+            "-D" + Constant.HDFS_SCHEMA_REMOTE_PATH_KEY + "=" + outputSchemaFile,
-            + " -D " + Constant.HDFS_SCHEMA_REMOTE_PATH_KEY + "=" + outputSchemaFile
+            "-D" + Constant.HDFS_SAMPLE_REMOTE_PATH_KEY + "=" + outputSampleDataFile,
-            + " -D " + Constant.HDFS_SAMPLE_REMOTE_PATH_KEY + "=" + outputSampleDataFile
+            "-D" + Constant.HDFS_CLUSTER_KEY + "=" + cluster,
-            + " -D " + Constant.HDFS_CLUSTER_KEY + "=" + cluster
+            "-D" + Constant.HDFS_WHITE_LIST_KEY + "=" + whiteList,
-            + " -D " + Constant.HDFS_WHITE_LIST_KEY + "=" + whiteList
+            "-D" + Constant.HDFS_NUM_OF_THREAD_KEY + "=" + numOfThread,
-            + " -D " + Constant.HDFS_NUM_OF_THREAD_KEY + "=" + numOfThread
+            "-D" + Constant.HDFS_REMOTE_USER_KEY + "=" + hdfsUser,
-            + " -D " + Constant.HDFS_REMOTE_USER_KEY + "=" + hdfsUser
+            "-D" + Constant.HDFS_REMOTE_KEYTAB_LOCATION_KEY + "=" + hdfsKeyTab,
-            + " -D log_file_name=hdfs_schema_fetch" 
+            "-Dlog.file.name=hdfs_schema_fetch" };
-            + " -D " + Constant.HDFS_REMOTE_KEYTAB_LOCATION_KEY + "=" + hdfsKeyTab;
-    //logger.info("executue remote command : " + execCmd);
 
-    Process process = Runtime.getRuntime().exec(execCmd);
+    ProcessBuilder pb = new ProcessBuilder(hadoopCmd);
+    File logFile = new File(hdfsExtractLogFile);
+    pb.redirectErrorStream(true);
+    pb.redirectOutput(ProcessBuilder.Redirect.appendTo(logFile));
+    Process process = pb.start();
     int pid = -1;
     if(process.getClass().getName().equals("java.lang.UNIXProcess")) {
         /* get the PID on unix/linux systems */
@@ -119,22 +125,7 @@ public class HdfsMetadataEtl extends EtlJob {
         } catch (Throwable e) {
         }
     }
-    logger.info("executue remote command [PID=" + pid + "]: " + execCmd);
+    logger.info("executue command [PID=" + pid + "]: " + hadoopCmd);
-
-    BufferedInputStream stdout = new BufferedInputStream(process.getInputStream());
-    byte[] bytes = new byte[4096];
-    while (stdout.read(bytes) != -1) {}
-
-    String line = null;
-    /* @need to redo this part using ProcessBuilder + redirection      
-    InputStream stdout = process.getInputStream();
-    InputStreamReader isr = new InputStreamReader(stdout);
-    BufferedReader br = new BufferedReader(isr);
-    
-
-    while ( (line = br.readLine()) != null) {
-      logger.info(line);
-    }*/
 
     // wait until this process finished.
     int execResult = process.waitFor();
@@ -142,7 +133,8 @@ public class HdfsMetadataEtl extends EtlJob {
     // if the process failed, log the error and throw exception
     if (execResult > 0) {
       BufferedReader br = new BufferedReader(new InputStreamReader(process.getErrorStream()));
-      String errString = "Error Details:\n";
+      String errString = "HDFS Metadata Extract Error:\n";
+      String line = "";
       while((line = br.readLine()) != null)
         errString = errString.concat(line).concat("\n");
       logger.error("*** Process  failed, status: " + execResult);

metadata-etl/src/main/resources/jython/HdfsLoad.py

@@ -61,7 +61,7 @@ class HdfsLoad:
         update stg_dict_dataset
         set name = substring_index(urn, '/', -2)
         where db_id = {db_id}
-          and name in ('1.0', '2.0', '3.0', '4.0', '0.1', '0.2', '0.3', '0.4', 'dedup', '1-day', '7-day');
+          and name regexp '[0-9]+\\.[0-9]+|dedup|dedupe|[0-9]+-day';
 
         -- update parent name, this depends on the data from source system
         update stg_dict_dataset
@@ -109,7 +109,7 @@ class HdfsLoad:
           wh_etl_exec_id={wh_etl_exec_id}, abstract_dataset_urn=s.urn, schema_text=s.schema;
 
         -- insert into final table
-        INSERT INTO dict_dataset
+        INSERT IGNORE INTO dict_dataset
         ( `name`,
           `schema`,
           schema_type,
@@ -159,7 +159,7 @@ class HdfsLoad:
         and sdi.db_id = {db_id};
 
         -- insert into final instance table
-        INSERT INTO dict_dataset_instance
+        INSERT IGNORE INTO dict_dataset_instance
         ( dataset_id,
           db_id,
           deployment_tier,
@@ -195,11 +195,13 @@ class HdfsLoad:
           instance_created_time=s.instance_created_time, created_time=s.created_time, wh_etl_exec_id=s.wh_etl_exec_id
           ;
         '''.format(source_file=self.input_file, db_id=self.db_id, wh_etl_exec_id=self.wh_etl_exec_id)
+
     for state in load_cmd.split(";"):
       self.logger.debug(state)
       cursor.execute(state)
       self.conn_mysql.commit()
     cursor.close()
+    self.logger.info("finish loading hdfs metadata db_id={db_id} to dict_dataset".format(db_id=self.db_id))
 
   def load_field(self):
     cursor = self.conn_mysql.cursor()
@@ -359,6 +361,7 @@ class HdfsLoad:
       cursor.execute(state)
       self.conn_mysql.commit()
     cursor.close()
+    self.logger.info("finish loading hdfs metadata db_id={db_id} to dict_field_detail".format(db_id=self.db_id))
 
   def load_sample(self):
     cursor = self.conn_mysql.cursor()
@@ -402,6 +405,7 @@ class HdfsLoad:
       cursor.execute(state)
       self.conn_mysql.commit()
     cursor.close()
+    self.logger.info("finish loading hdfs sample data db_id={db_id} to dict_dataset_sample".format(db_id=self.db_id))
 
 
 if __name__ == "__main__":

metadata-etl/src/main/resources/jython/HiveLoad.py

@@ -204,7 +204,7 @@ class HiveLoad:
         );
 
 
-       insert into dict_field_detail (
+       insert ignore into dict_field_detail (
           dataset_id, fields_layout_id, sort_id, parent_sort_id, parent_path,
           field_name, namespace, data_type, data_size, is_nullable, default_value,
            modified