Merge branch 'master' of https://github.com/dnet-team/dnet-hadoop

.gitignore

@@ -2,8 +2,19 @@
 .idea
 *.iml
 *~
+.classpath
+/*/.classpath
+/*/*/.classpath
+.metadata
+/*/.metadata
+/*/*/.metadata
+.project
+.log
+.settings
+/*/*/target
 /*/target
 /target
+/*/*/build
 /*/build
 /build
-spark-warehouse
+spark-warehouse

README.md

@@ -1 +1,2 @@
 # dnet-hadoop
+...test

dhp-applications/dhp-mdstore-manager-app/pom.xml

@@ -0,0 +1,92 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<groupId>eu.dnetlib</groupId>
+	<artifactId>dhp-mdstore-manager-app</artifactId>
+	<version>1.1.0-SNAPSHOT</version>
+
+	<!-- Inherit defaults from Spring Boot -->
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.3.RELEASE</version>
+		<relativePath></relativePath>
+	</parent>
+
+	<!-- <repositories> <repository> <id>dnet-deps</id> <name>dnet-dependencies</name> 
+		<url>http://maven.research-infrastructures.eu/nexus/content/repositories/dnet-deps</url> 
+		<layout>default</layout> </repository> <repository> <id>dnet45-releases</id> 
+		<name>D-Net 45 Releases</name> <url>http://maven.research-infrastructures.eu/nexus/content/repositories/dnet45-releases</url> 
+		<layout>default</layout> <snapshots> <enabled>true</enabled> </snapshots> 
+		</repository> <repository> <id>dnet45-snapshots</id> <name>D-Net 45 Snapshots</name> 
+		<url>http://maven.research-infrastructures.eu/nexus/content/repositories/dnet45-snapshots</url> 
+		<layout>default</layout> <snapshots> <enabled>true</enabled> </snapshots> 
+		</repository> </repositories> -->
+
+
+
+	<!-- Add typical dependencies for a web application -->
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-json</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.postgresql</groupId>
+			<artifactId>postgresql</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>com.vladmihalcea</groupId>
+			<artifactId>hibernate-types-52</artifactId>
+			<version>2.3.5</version>
+		</dependency>
+		<dependency>
+			<groupId>commons-io</groupId>
+			<artifactId>commons-io</artifactId>
+			<version>2.6</version>
+		</dependency>
+
+		<!-- Swagger -->
+		<dependency>
+			<groupId>io.springfox</groupId>
+			<artifactId>springfox-swagger2</artifactId>
+			<version>2.9.2</version>
+		</dependency>
+
+		<dependency>
+			<groupId>io.springfox</groupId>
+			<artifactId>springfox-swagger-ui</artifactId>
+			<version>2.9.2</version>
+		</dependency>
+
+		<!-- JUnit -->
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<configuration>
+					<executable>true</executable>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

dhp-applications/dhp-mdstore-manager-app/src/main/java/eu/dnetlib/data/mdstore/manager/MDStoreManagerException.java

@@ -0,0 +1,30 @@
+package eu.dnetlib.data.mdstore.manager;
+
+public class MDStoreManagerException extends Exception{
+
+	/**
+	 *
+	 */
+	private static final long serialVersionUID = -7503316126409002675L;
+
+	public MDStoreManagerException() {
+		super();
+	}
+
+	public MDStoreManagerException(String message, Throwable cause, boolean enableSuppression,
+			boolean writableStackTrace) {
+		super(message, cause, enableSuppression, writableStackTrace);
+	}
+
+	public MDStoreManagerException(String message, Throwable cause) {
+		super(message, cause);
+	}
+
+	public MDStoreManagerException(String message) {
+		super(message);
+	}
+
+	public MDStoreManagerException(Throwable cause) {
+		super(cause);
+	}
+}

dhp-applications/dhp-mdstore-manager-app/src/main/java/eu/dnetlib/data/mdstore/manager/MainApplication.java

@@ -0,0 +1,49 @@
+package eu.dnetlib.data.mdstore.manager;
+
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.context.annotation.Bean;
+
+import springfox.documentation.builders.ApiInfoBuilder;
+import springfox.documentation.builders.RequestHandlerSelectors;
+import springfox.documentation.service.ApiInfo;
+import springfox.documentation.spi.DocumentationType;
+import springfox.documentation.spring.web.plugins.Docket;
+import springfox.documentation.swagger2.annotations.EnableSwagger2;
+
+@SpringBootApplication
+@EnableSwagger2
+@EnableCaching
+public class MainApplication {
+
+	private static final Logger log = LoggerFactory.getLogger(MainApplication.class);
+
+	public static void main(final String[] args) {
+		SpringApplication.run(MainApplication.class, args);
+	}
+
+	@Bean
+	public static Docket newSwaggerDocket() {
+		log.info("Initializing SWAGGER...");
+
+		return new Docket(DocumentationType.SWAGGER_2)
+				.select()
+				.apis(RequestHandlerSelectors.any())
+				.paths(p -> p.startsWith("/api/"))
+				.build().apiInfo(new ApiInfoBuilder()
+						.title("MDStore Manager APIs")
+						.description("APIs documentation")
+						.version("1.1")
+						.contact(ApiInfo.DEFAULT_CONTACT)
+						.license("Apache 2.0")
+						.licenseUrl("http://www.apache.org/licenses/LICENSE-2.0")
+						.build());
+
+	}
+
+
+}

dhp-applications/dhp-mdstore-manager-app/src/main/java/eu/dnetlib/data/mdstore/manager/SwaggerController.java

@@ -0,0 +1,14 @@
+package eu.dnetlib.data.mdstore.manager;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+
+@Controller
+public class SwaggerController {
+
+	@RequestMapping(value = { "/", "/apidoc", "/api-doc", "/doc", "/swagger" }, method = RequestMethod.GET)
+	public String apiDoc() {
+		return "redirect:swagger-ui.html";
+	}
+}

dhp-applications/dhp-mdstore-manager-app/src/main/java/eu/dnetlib/data/mdstore/manager/controller/MDStoreController.java

@@ -0,0 +1,79 @@
+package eu.dnetlib.data.mdstore.manager.controller;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import eu.dnetlib.data.mdstore.manager.MDStoreManagerException;
+import eu.dnetlib.data.mdstore.manager.model.MDStore;
+import eu.dnetlib.data.mdstore.manager.model.MDStoreWithInfo;
+import eu.dnetlib.data.mdstore.manager.model.Transaction;
+import eu.dnetlib.data.mdstore.manager.repository.MDStoreRepository;
+import eu.dnetlib.data.mdstore.manager.repository.MDStoreWithInfoRepository;
+import eu.dnetlib.data.mdstore.manager.repository.TransactionRepository;
+
+@RestController
+@RequestMapping("/api/mdstores")
+public class MDStoreController  {
+
+	@Autowired
+	private MDStoreRepository mdstoreRepository;
+	@Autowired
+	private TransactionRepository transactionRepository;
+	@Autowired
+	private MDStoreWithInfoRepository mdstoreWithInfoRepository;
+
+	@RequestMapping(value = "/", method = RequestMethod.GET)
+	public final Iterable<MDStoreWithInfo> find() {
+		return mdstoreWithInfoRepository.findAll();
+	}
+
+	@RequestMapping(value = "/identifiers", method = RequestMethod.GET)
+	public final List<String> findIdentifiers() {
+		return mdstoreRepository.findAll().stream().map(MDStore::getId).collect(Collectors.toList());
+	}
+
+	@RequestMapping(value = "/byId/{id}", method = RequestMethod.GET)
+	public final MDStoreWithInfo get(@PathVariable final String id) {
+		return mdstoreWithInfoRepository.findById(id).orElse(null);
+	}
+
+	@RequestMapping(value = "/count", method = RequestMethod.GET)
+	public final long count() {
+		return mdstoreRepository.count();
+	}
+
+	@RequestMapping(value = "/new/{format}/{layout}/{interpretation}", method = RequestMethod.PUT)
+	public MDStoreWithInfo  createMDStore(
+			@PathVariable String format,
+			@PathVariable String layout,
+			@PathVariable String interpretation,
+			@RequestParam(required=false) String dsId,
+			@RequestParam(required=false) String apiId) throws MDStoreManagerException {
+		final MDStore md = MDStore.newInstance(dsId, apiId, format, layout, interpretation);
+		mdstoreRepository.save(md);
+
+		final Transaction t = Transaction.newInstance(md.getId());
+		t.setCurrent(true);
+		transactionRepository.save(t);
+
+		return mdstoreWithInfoRepository.findById(md.getId()).orElseThrow(() -> new MDStoreManagerException("MDStore not found"));
+	}
+
+	@RequestMapping(value = "/{id}", method = RequestMethod.DELETE)
+	public void delete(@PathVariable final String id) throws MDStoreManagerException {
+		if (transactionRepository.countByMdstoreAndActive(id, true) == 0) {
+			transactionRepository.deleteByMdstore(id);
+			mdstoreRepository.deleteById(id);
+		} else {
+			throw new MDStoreManagerException("Active transactions found on mdstore : " + id);
+		}
+	}
+
+}

dhp-applications/dhp-mdstore-manager-app/src/main/java/eu/dnetlib/data/mdstore/manager/controller/TransactionController.java

@@ -0,0 +1,41 @@
+package eu.dnetlib.data.mdstore.manager.controller;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+import eu.dnetlib.data.mdstore.manager.model.Transaction;
+import eu.dnetlib.data.mdstore.manager.repository.TransactionRepository;
+
+@RestController
+@RequestMapping("/api/transactions")
+public class TransactionController  {
+
+	@Autowired
+	private TransactionRepository repo;
+
+	@RequestMapping(value = "/", method = RequestMethod.GET)
+	public final List<Transaction> find() {
+		return repo.findAll();
+	}
+
+	@RequestMapping(value = "/identifiers", method = RequestMethod.GET)
+	public final List<String> findIdentifiers() {
+		return repo.findAll().stream().map(Transaction::getId).collect(Collectors.toList());
+	}
+
+	@RequestMapping(value = "/{id}", method = RequestMethod.GET)
+	public final Transaction get(@PathVariable final String id) {
+		return repo.findById(id).orElse(null);
+	}
+
+	@RequestMapping(value = "/count", method = RequestMethod.GET)
+	public final long count() {
+		return repo.count();
+	}
+}

dhp-applications/dhp-mdstore-manager-app/src/main/java/eu/dnetlib/data/mdstore/manager/model/MDStore.java

@@ -0,0 +1,108 @@
+package eu.dnetlib.data.mdstore.manager.model;
+
+import java.io.Serializable;
+import java.util.UUID;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "mdstores")
+public class MDStore implements Serializable {
+
+	/**
+	 *
+	 */
+	private static final long serialVersionUID = 3160530489149700055L;
+
+	@Id
+	@Column(name = "id")
+	private String id;
+
+	@Column(name = "format")
+	private String format;
+
+	@Column(name = "layout")
+	private String layout;
+
+
+	@Column(name = "interpretation")
+	private String interpretation;
+
+	@Column(name = "datasource_id")
+	private String datasourceId;
+
+	@Column(name = "api_id")
+	private String apiId ;
+
+
+	public String getId() {
+		return id;
+	}
+
+	public void setId(String id) {
+		this.id = id;
+	}
+
+	public String getFormat() {
+		return format;
+	}
+
+	public void setFormat(String format) {
+		this.format = format;
+	}
+
+	public String getLayout() {
+		return layout;
+	}
+
+	public void setLayout(String layout) {
+		this.layout = layout;
+	}
+
+	public String getInterpretation() {
+		return interpretation;
+	}
+
+	public void setInterpretation(String interpretation) {
+		this.interpretation = interpretation;
+	}
+
+	public String getDatasourceId() {
+		return datasourceId;
+	}
+
+	public void setDatasourceId(String datasourceId) {
+		this.datasourceId = datasourceId;
+	}
+
+	public String getApiId() {
+		return apiId;
+	}
+
+	public void setApiId(String apiId) {
+		this.apiId = apiId;
+	}
+
+	public static MDStore newInstance(final String format, final String layout, final String interpretation) {
+		return newInstance(null, null, format, layout, interpretation);
+	}
+
+	public static MDStore newInstance(final String dsId, final String apiId, final String format, final String layout, final String interpretation) {
+		final MDStore md = new MDStore();
+		md.setId("md-" + UUID.randomUUID());
+		md.setDatasourceId(dsId);
+		md.setApiId(apiId);
+		md.setFormat(format);
+		md.setLayout(layout);
+		md.setInterpretation(interpretation);
+		return md;
+	}
+
+
+
+
+
+}

dhp-applications/dhp-mdstore-manager-app/src/main/java/eu/dnetlib/data/mdstore/manager/model/MDStoreWithInfo.java

@@ -0,0 +1,124 @@
+package eu.dnetlib.data.mdstore.manager.model;
+
+import java.io.Serializable;
+import java.util.Date;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.Table;
+import javax.persistence.Temporal;
+import javax.persistence.TemporalType;
+
+@Entity
+@Table(name = "mdstores_with_info")
+public class MDStoreWithInfo implements Serializable {
+
+	/**
+	 *
+	 */
+	private static final long serialVersionUID = -8445784770687571492L;
+
+	@Id
+	@Column(name = "id")
+	private String id;
+
+	@Column(name = "format")
+	private String format;
+
+	@Column(name = "layout")
+	private String layout;
+
+	@Column(name = "interpretation")
+	private String interpretation;
+
+	@Column(name = "datasource_id")
+	private String datasourceId;
+
+	@Column(name = "api_id")
+	private String apiId ;
+
+	@Column(name = "current_version")
+	private String currentVersion;
+
+	@Column(name = "lastupdate")
+	@Temporal(TemporalType.TIMESTAMP)
+	private Date lastUpdate;
+
+	@Column(name = "size")
+	private int size;
+
+	public String getId() {
+		return id;
+	}
+
+	public void setId(String id) {
+		this.id = id;
+	}
+
+	public String getFormat() {
+		return format;
+	}
+
+	public void setFormat(String format) {
+		this.format = format;
+	}
+
+	public String getLayout() {
+		return layout;
+	}
+
+	public void setLayout(String layout) {
+		this.layout = layout;
+	}
+
+	public String getInterpretation() {
+		return interpretation;
+	}
+
+	public void setInterpretation(String interpretation) {
+		this.interpretation = interpretation;
+	}
+
+	public String getDatasourceId() {
+		return datasourceId;
+	}
+
+	public void setDatasourceId(String datasourceId) {
+		this.datasourceId = datasourceId;
+	}
+
+	public String getApiId() {
+		return apiId;
+	}
+
+	public void setApiId(String apiId) {
+		this.apiId = apiId;
+	}
+
+	public String getCurrentVersion() {
+		return currentVersion;
+	}
+
+	public void setCurrentVersion(String currentVersion) {
+		this.currentVersion = currentVersion;
+	}
+
+	public Date getLastUpdate() {
+		return lastUpdate;
+	}
+
+	public void setLastUpdate(Date lastUpdate) {
+		this.lastUpdate = lastUpdate;
+	}
+
+	public int getSize() {
+		return size;
+	}
+
+	public void setSize(int size) {
+		this.size = size;
+	}
+
+
+}

dhp-applications/dhp-mdstore-manager-app/src/main/java/eu/dnetlib/data/mdstore/manager/model/Transaction.java

@@ -0,0 +1,114 @@
+package eu.dnetlib.data.mdstore.manager.model;
+
+import java.io.Serializable;
+import java.util.Date;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.Table;
+import javax.persistence.Temporal;
+import javax.persistence.TemporalType;
+
+@Entity
+@Table(name = "transactions")
+public class Transaction implements Serializable{
+	/**
+	 *
+	 */
+	private static final long serialVersionUID = -4763494442274298339L;
+
+	@Id
+	@Column(name = "id")
+	private String id;
+
+	@Column(name = "mdstore")
+	private String mdstore;
+
+	@Column(name = "current")
+	private boolean current;
+
+	@Column(name = "active")
+	private boolean active;
+
+	@Column(name = "readcount")
+	private int readCount;
+
+	@Column(name = "lastupdate")
+	@Temporal(TemporalType.TIMESTAMP)
+	private Date lastUpdate;
+
+	@Column(name = "size")
+	private int size;
+
+	public String getId() {
+		return id;
+	}
+
+	public void setId(String id) {
+		this.id = id;
+	}
+
+	public String getMdstore() {
+		return mdstore;
+	}
+
+	public void setMdstore(String mdstore) {
+		this.mdstore = mdstore;
+	}
+
+	public boolean isCurrent() {
+		return current;
+	}
+
+	public void setCurrent(boolean current) {
+		this.current = current;
+	}
+
+	public boolean isActive() {
+		return active;
+	}
+
+	public void setActive(boolean active) {
+		this.active = active;
+	}
+
+	public int getReadCount() {
+		return readCount;
+	}
+
+	public void setReadCount(int readCount) {
+		this.readCount = readCount;
+	}
+
+	public Date getLastUpdate() {
+		return lastUpdate;
+	}
+
+	public void setLastUpdate(Date lastUpdate) {
+		this.lastUpdate = lastUpdate;
+	}
+
+	public int getSize() {
+		return size;
+	}
+
+	public void setSize(int size) {
+		this.size = size;
+	}
+
+	public static Transaction newInstance(final String mdId) {
+		final Transaction t = new Transaction();
+		t.setId(mdId + "-" + new Date().getTime());
+		t.setMdstore(mdId);
+		t.setLastUpdate(null);
+		t.setActive(false);
+		t.setCurrent(false);
+		t.setReadCount(0);
+		t.setSize(0);
+		return t;
+	}
+
+
+
+}

dhp-applications/dhp-mdstore-manager-app/src/main/java/eu/dnetlib/data/mdstore/manager/repository/MDStoreRepository.java

@@ -0,0 +1,11 @@
+package eu.dnetlib.data.mdstore.manager.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import eu.dnetlib.data.mdstore.manager.model.MDStore;
+
+@Repository
+public interface MDStoreRepository extends JpaRepository<MDStore, String> {
+
+}

dhp-applications/dhp-mdstore-manager-app/src/main/java/eu/dnetlib/data/mdstore/manager/repository/MDStoreWithInfoRepository.java

@@ -0,0 +1,10 @@
+package eu.dnetlib.data.mdstore.manager.repository;
+
+import org.springframework.stereotype.Repository;
+
+import eu.dnetlib.data.mdstore.manager.model.MDStoreWithInfo;
+
+@Repository
+public interface MDStoreWithInfoRepository extends ReadOnlyRepository<MDStoreWithInfo, String> {
+
+}

dhp-applications/dhp-mdstore-manager-app/src/main/java/eu/dnetlib/data/mdstore/manager/repository/ReadOnlyRepository.java

@@ -0,0 +1,18 @@
+package eu.dnetlib.data.mdstore.manager.repository;
+
+import java.util.Optional;
+
+import org.springframework.data.repository.NoRepositoryBean;
+import org.springframework.data.repository.Repository;
+
+@NoRepositoryBean
+public interface ReadOnlyRepository<T, ID> extends Repository<T, ID> {
+
+	Optional<T> findById(ID id);
+
+	boolean existsById(ID id);
+
+	Iterable<T> findAll();
+
+	long count();
+}

dhp-applications/dhp-mdstore-manager-app/src/main/java/eu/dnetlib/data/mdstore/manager/repository/TransactionRepository.java

@@ -0,0 +1,14 @@
+package eu.dnetlib.data.mdstore.manager.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import eu.dnetlib.data.mdstore.manager.model.Transaction;
+
+@Repository
+public interface TransactionRepository extends JpaRepository<Transaction, String> {
+
+	void deleteByMdstore(String id);
+
+	int countByMdstoreAndActive(String id, boolean active);
+}

dhp-applications/dhp-mdstore-manager-app/src/main/resources/application.properties

@@ -0,0 +1,14 @@
+spring.main.banner-mode = console
+logging.level.root      = INFO
+
+spring.datasource.url=jdbc:postgresql://localhost:5432/mdstoremanager
+spring.datasource.username=
+spring.datasource.password=
+
+spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect
+
+# Hibernate ddl auto (create, create-drop, validate, update)
+spring.jpa.hibernate.ddl-auto = validate
+spring.jpa.properties.hibernate.hbm2dll.extra_physical_table_types = MATERIALIZED VIEW
+spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true
+spring.jpa.open-in-view=true

dhp-applications/dhp-mdstore-manager-app/src/main/resources/schema.sql

@@ -0,0 +1,38 @@
+DROP VIEW  IF EXISTS mdstores_with_info;
+DROP TABLE IF EXISTS transactions;
+DROP TABLE IF EXISTS mdstores;
+
+CREATE TABLE mdstores (
+	id              text PRIMARY KEY,
+	format          text,
+	layout          text,
+	interpretation  text,
+	datasource_id   text,
+	api_id          text
+);
+
+CREATE TABLE transactions (
+	id              text PRIMARY KEY,
+	mdstore         text REFERENCES mdstores(id),
+	current         boolean,
+	active          boolean,
+	readcount       int,
+	lastupdate      timestamp,
+	size            int
+);
+
+CREATE VIEW mdstores_with_info AS SELECT
+	md.id              AS id,
+	md.format          AS format,
+	md.layout          AS layout,
+	md.interpretation  AS interpretation,
+	md.datasource_id   AS datasource_id,
+	md.api_id          AS api_id, 
+	t.id               AS current_version,
+	t.lastupdate       AS lastupdate,
+	t.size             AS size
+FROM
+	mdstores md
+	LEFT OUTER JOIN transactions t ON (md.id = t.mdstore)
+WHERE
+	t.current = TRUE;

dhp-applications/pom.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>eu.dnetlib.dhp</groupId>
+        <artifactId>dhp</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+    <artifactId>dhp-applications</artifactId>
+    <packaging>pom</packaging>
+    <modules>
+        <module>dhp-mdstore-manager-app</module>
+    </modules>
+
+</project>

pom.xml

@@ -23,6 +23,7 @@
         <!--<module>dhp-build</module>-->
         <module>dhp-common</module>
         <module>dhp-workflows</module>
+	<module>dhp-applications</module>
     </modules>
 
     <issueManagement>