Refactor DatasetOwner using readonly model (#702)

wherehows-dao/src/main/java/wherehows/dao/DaoFactory.java

@@ -14,13 +14,19 @@
 package wherehows.dao;
 
 import javax.persistence.EntityManagerFactory;
-import wherehows.models.DictDataset;
 
 
 public class DaoFactory {
 
+  protected final EntityManagerFactory entityManagerFactory;
+
   private static DatasetsDao datasetsDao;
-  private final EntityManagerFactory entityManagerFactory;
+
+  private static MetadataReadOnlyDao metadataReadOnlyDao;
+
+  public DaoFactory(EntityManagerFactory entityManagerFactory) {
+    this.entityManagerFactory = entityManagerFactory;
+  }
 
   public DatasetsDao getDatasetsDao() {
     if (datasetsDao == null) {
@@ -29,8 +35,11 @@ public class DaoFactory {
     return datasetsDao;
   }
 
-  public DaoFactory(EntityManagerFactory entityManagerFactory) {
+  public MetadataReadOnlyDao getMetadataReadOnlyDao() {
-    this.entityManagerFactory = entityManagerFactory;
+    if (metadataReadOnlyDao == null) {
+      metadataReadOnlyDao = new MetadataReadOnlyDao(entityManagerFactory);
+    }
+    return metadataReadOnlyDao;
   }
 
   public DatasetClassificationDao getDatasetClassificationDao() {

wherehows-dao/src/main/java/wherehows/dao/DatasetsDao.java

@@ -30,7 +30,6 @@ import org.springframework.jdbc.core.BatchPreparedStatementSetter;
 import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
 import wherehows.mapper.DatasetColumnRowMapper;
-import wherehows.mapper.DatasetOwnerRowMapper;
 import wherehows.models.DatasetColumn;
 import wherehows.models.DatasetCompliance;
 import wherehows.models.DatasetFieldEntity;
@@ -64,13 +63,6 @@ public class DatasetsDao {
           + "(ddfc.field_id = dfd.field_id AND ddfc.is_default = true) LEFT JOIN comments c ON "
           + "c.id = ddfc.comment_id WHERE dfd.dataset_id = ? AND dfd.field_id = ? ORDER BY dfd.sort_id";
 
-  private final static String GET_DATASET_OWNERS_BY_ID =
-      "SELECT o.owner_id, u.display_name, o.sort_id, o.owner_type, o.namespace, o.owner_id_type, o.owner_source, "
-          + "o.owner_sub_type, o.confirmed_by, u.email, u.is_active, is_group, o.modified_time "
-          + "FROM dataset_owner o "
-          + "LEFT JOIN dir_external_user_info u on (o.owner_id = u.user_id and u.app_id = 300) "
-          + "WHERE o.dataset_id = ? and (o.is_deleted is null OR o.is_deleted != 'Y') ORDER BY o.sort_id";
-
   private final static String UPDATE_DATASET_CONFIRMED_OWNERS =
       "INSERT INTO dataset_owner (dataset_id, owner_id, app_id, namespace, owner_type, is_group, is_active, "
           + "is_deleted, sort_id, created_time, modified_time, wh_etl_exec_id, dataset_urn, owner_sub_type, "
@@ -124,11 +116,6 @@ public class DatasetsDao {
         columnId);
   }
 
-  public List<DatasetOwner> getDatasetOwnersByID(JdbcTemplate jdbcTemplate,
-      NamedParameterJdbcTemplate namedJdbcTemplate, int datasetId) {
-    return jdbcTemplate.query(GET_DATASET_OWNERS_BY_ID, new DatasetOwnerRowMapper(), datasetId);
-  }
-
   public void updateDatasetOwners(JdbcTemplate jdbcTemplate, String user, int datasetId, List<DatasetOwner> owners)
       throws Exception {
     // first mark existing owners as deleted, new owners will be updated later

wherehows-dao/src/main/java/wherehows/dao/MetadataReadOnlyDao.java

@@ -0,0 +1,190 @@
+/**
+ * Copyright 2015 LinkedIn Corp. All rights reserved.
+ *
+ * Licensed 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.
+ */
+package wherehows.dao;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import javax.persistence.EntityManager;
+import javax.persistence.EntityManagerFactory;
+import javax.persistence.Query;
+import lombok.SneakyThrows;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import wherehows.models.DatasetOwner;
+
+
+/**
+ * Intended to be used for Front-end readonly functions
+ * Use native SQL and then map to entity
+ */
+public class MetadataReadOnlyDao {
+
+  private static final Logger log = LoggerFactory.getLogger(MetadataReadOnlyDao.class);
+
+  private final EntityManagerFactory _emFactory;
+
+  public MetadataReadOnlyDao(EntityManagerFactory factory) {
+    this._emFactory = factory;
+  }
+
+  private static final String GET_DATASET_URN_BY_ID = "SELECT urn FROM dict_dataset WHERE id = :id";
+
+  private final static String GET_DATASET_OWNERS_BY_ID =
+      "SELECT o.owner_id, u.display_name, o.sort_id, o.owner_type, o.namespace, o.owner_id_type, o.owner_source, "
+          + "o.owner_sub_type, o.confirmed_by, u.email, u.is_active, is_group, o.modified_time "
+          + "FROM dataset_owner o "
+          + "LEFT JOIN dir_external_user_info u on (o.owner_id = u.user_id and u.app_id = 300) "
+          + "WHERE o.dataset_id = :datasetId and (o.is_deleted is null OR o.is_deleted != 'Y') ORDER BY o.sort_id";
+
+  /**
+   * get dataset URN by dataset ID
+   * @param datasetId int
+   * @return URN String, if not found, return null
+   */
+  public String getDatasetUrnById(int datasetId) {
+    Map<String, Object> params = new HashMap<>();
+    params.put("id", datasetId);
+
+    List<Object> result = getObjectListBy(GET_DATASET_URN_BY_ID, params);
+    if (result == null || result.size() == 0) {
+      log.error("Can not find URN for dataset id: " + datasetId + " : ");
+      return null;
+    }
+    return (String) result.get(0);
+  }
+
+  /**
+   * Get dataset owner list by dataset ID
+   * @param datasetId int
+   * @return List of DatasetOwner
+   */
+  public List<DatasetOwner> getDatasetOwnersByID(int datasetId) {
+    Map<String, Object> params = new HashMap<>();
+    params.put("datasetId", datasetId);
+
+    List<DatasetOwner> owners = getEntityListBy(GET_DATASET_OWNERS_BY_ID, DatasetOwner.class, params);
+    for (DatasetOwner owner : owners) {
+      owner.setModifiedTime(owner.getModifiedTime() * 1000);
+    }
+    return owners;
+  }
+
+  /**
+   * get dataset URN by dataset ID and do simple validate
+   * @param datasetId int
+   * @return valid Wherehows URN
+   * @throws IllegalArgumentException when dataset URN not found or invalid
+   */
+  public String validateUrn(int datasetId) throws IllegalArgumentException {
+    String urn = getDatasetUrnById(datasetId);
+    if (urn == null || urn.length() < 6 || urn.split(":///").length != 2) {
+      throw new IllegalArgumentException("Dataset id not found: " + datasetId);
+    }
+    return urn;
+  }
+
+  /**
+   * generic function to fetch a list of entities using native SQL with named parameters.
+   * @param sqlQuery SQL query string
+   * @param classType T.class the return class type
+   * @param params named parameters map
+   * @param <T> Generic return Data type
+   * @return List of records T
+   */
+  @SneakyThrows
+  @SuppressWarnings("unchecked")
+  protected <T> List<T> getEntityListBy(String sqlQuery, Class classType, Map<String, Object> params) {
+    EntityManager entityManager = _emFactory.createEntityManager();
+    Query query = entityManager.createNativeQuery(sqlQuery, classType);
+    for (Map.Entry<String, Object> param : params.entrySet()) {
+      query.setParameter(param.getKey(), param.getValue());
+    }
+
+    try {
+      return (List<T>) query.getResultList();
+    } finally {
+      entityManager.close();
+    }
+  }
+
+  /**
+   * generic function to fetch a single entity using native SQL with named parameters.
+   * @param sqlQuery SQL query string
+   * @param classType T.class the return class type
+   * @param params named parameters map
+   * @param <T> Generic return Data type
+   * @return a single record T
+   */
+  @SneakyThrows
+  @SuppressWarnings("unchecked")
+  protected <T> T getEntityBy(String sqlQuery, Class classType, Map<String, Object> params) {
+    EntityManager entityManager = _emFactory.createEntityManager();
+    Query query = entityManager.createNativeQuery(sqlQuery, classType);
+    for (Map.Entry<String, Object> param : params.entrySet()) {
+      query.setParameter(param.getKey(), param.getValue());
+    }
+
+    try {
+      return (T) query.getSingleResult();
+    } finally {
+      entityManager.close();
+    }
+  }
+
+  /**
+   * generic function to fetch records using native SQL with named parameters and return multiple column
+   * @param sqlQuery SQL query string
+   * @param params named parameters map
+   * @return List of Object[]
+   */
+  @SneakyThrows
+  @SuppressWarnings("unchecked")
+  protected List<Object[]> getObjectArrayListBy(String sqlQuery, Map<String, Object> params) {
+    EntityManager entityManager = _emFactory.createEntityManager();
+    Query query = entityManager.createNativeQuery(sqlQuery);
+    for (Map.Entry<String, Object> param : params.entrySet()) {
+      query.setParameter(param.getKey(), param.getValue());
+    }
+
+    try {
+      return query.getResultList();
+    } finally {
+      entityManager.close();
+    }
+  }
+
+
+  /**
+   * generic function to fetch records using native SQL with named parameters and return single column
+   * @param sqlQuery SQL query string
+   * @param params named parameters map
+   * @return List of Object
+   */
+  @SneakyThrows
+  @SuppressWarnings("unchecked")
+  protected List<Object> getObjectListBy(String sqlQuery, Map<String, Object> params) {
+    EntityManager entityManager = _emFactory.createEntityManager();
+    Query query = entityManager.createNativeQuery(sqlQuery);
+    for (Map.Entry<String, Object> param : params.entrySet()) {
+      query.setParameter(param.getKey(), param.getValue());
+    }
+
+    try {
+      return query.getResultList();
+    } finally {
+      entityManager.close();
+    }
+  }
+}

wherehows-dao/src/main/java/wherehows/mapper/DatasetOwnerRowMapper.java

@@ -1,43 +0,0 @@
-/**
- * Copyright 2015 LinkedIn Corp. All rights reserved.
- *
- * Licensed 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.
- */
-package wherehows.mapper;
-
-import java.sql.ResultSet;
-import java.sql.SQLException;
-import org.springframework.jdbc.core.RowMapper;
-import wherehows.models.DatasetOwner;
-
-
-public class DatasetOwnerRowMapper implements RowMapper<DatasetOwner> {
-  @Override
-  public DatasetOwner mapRow(ResultSet rs, int rowNum) throws SQLException {
-    final DatasetOwner owner = new DatasetOwner();
-
-    owner.setUserName(rs.getString("owner_id"));
-    owner.setName(rs.getString("display_name"));
-    owner.setNamespace(rs.getString("namespace"));
-    owner.setEmail(rs.getString("email"));
-    owner.setType(rs.getString("owner_type"));
-    owner.setSubType(rs.getString("owner_sub_type"));
-    owner.setIdType(rs.getString("owner_id_type"));
-    owner.setSource(rs.getString("owner_source"));
-    owner.setIsGroup("Y".equalsIgnoreCase(rs.getString("is_group")));
-    owner.setIsActive("Y".equalsIgnoreCase(rs.getString("is_active")));
-    owner.setSortId(rs.getInt("sort_id"));
-    owner.setConfirmedBy(rs.getString("confirmed_by"));
-    owner.setModifiedTime(rs.getLong("modified_time") * 1000);
-
-    return owner;
-  }
-}

wherehows-dao/src/main/java/wherehows/models/DatasetOwner.java

@@ -18,8 +18,6 @@ import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.Id;
 import javax.persistence.IdClass;
-import javax.persistence.Table;
-import javax.persistence.Transient;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
@@ -28,7 +26,6 @@ import lombok.NoArgsConstructor;
 @NoArgsConstructor
 @Entity
 @IdClass(DatasetOwner.DatasetOwnerKey.class)
-@Table(name = "dataset_owner")
 public class DatasetOwner {
 
   @Id
@@ -42,10 +39,10 @@ public class DatasetOwner {
   @Column(name = "namespace")
   private String namespace;
 
-  @Transient
+  @Column(name = "display_name")
   private String name;
 
-  @Transient
+  @Column(name = "email")
   private String email;
 
   @Column(name = "is_group")

wherehows-dao/src/main/java/wherehows/util/Urn.java

@@ -98,9 +98,9 @@ public class Urn {
   public static boolean validateUrn(String urnString) {
 
     String[] splitResult = urnString.split(":///");
-    if ((datasetTypes.contains(splitResult[0]) || splitResult[0].matches("\\w+")) &&
+    if ((datasetTypes.contains(splitResult[0]) || splitResult[0].matches("\\w+")) && splitResult.length > 1) {
-        splitResult.length > 1)
       return true;
+    }
     return false;
   }
 }

wherehows-frontend/app/controllers/api/v1/Dataset.java

@@ -36,6 +36,7 @@ import play.mvc.Controller;
 import play.mvc.Result;
 import wherehows.dao.DatasetClassificationDao;
 import wherehows.dao.DatasetsDao;
+import wherehows.dao.MetadataReadOnlyDao;
 import wherehows.models.DatasetClassification;
 import wherehows.models.DatasetColumn;
 import wherehows.models.DatasetCompliance;
@@ -55,6 +56,8 @@ public class Dataset extends Controller {
   private static final DatasetClassificationDao CLASSIFICATION_DAO =
       Application.DAO_FACTORY.getDatasetClassificationDao();
 
+  private static final MetadataReadOnlyDao READONLY_DAO = Application.DAO_FACTORY.getMetadataReadOnlyDao();
+
   public static Result getDatasetOwnerTypes() {
     ObjectNode result = Json.newObject();
 
@@ -198,7 +201,7 @@ public class Dataset extends Controller {
     ObjectNode result = Json.newObject();
 
     try {
-      result.set("owners", Json.toJson(DATASETS_DAO.getDatasetOwnersByID(JDBC_TEMPLATE, NAMED_JDBC_TEMPLATE, id)));
+      result.set("owners", Json.toJson(READONLY_DAO.getDatasetOwnersByID(id)));
       result.put("status", "ok");
     } catch (Exception e) {
       Logger.warn("Failed to get owners: " + e.toString());