Adding upload and validation of yang model

Issue-ID: CCSDK-2718

https: //jira.onap.org/browse/CCSDK-2718
Change-Id: I919525595e28d46f20c1adb560232c31025687e3

15 files changed, 590 insertions, 177 deletions

diff --git a/cps/cps-rest/pom.xml b/cps/cps-rest/pom.xml
index 0e8317b622..bd9be8dfde 100644
--- a/cps/cps-rest/pom.xml
+++ b/cps/cps-rest/pom.xml
@@ -24,6 +24,11 @@
         </dependency>

 

         <dependency>

+            <groupId>org.glassfish.jersey.media</groupId>

+            <artifactId>jersey-media-multipart</artifactId>

+        </dependency>

+

+        <dependency>

             <groupId>org.springframework.boot</groupId>

             <artifactId>spring-boot-starter-jersey</artifactId>

             <exclusions>

@@ -39,6 +44,7 @@
             <artifactId>spring-boot-starter-jetty</artifactId>

         </dependency>

 

+

         <dependency>

             <groupId>org.springframework.boot</groupId>

             <artifactId>spring-boot-starter-test</artifactId>

diff --git a/cps/cps-rest/src/main/java/org/onap/cps/rest/config/JerseyConfig.java b/cps/cps-rest/src/main/java/org/onap/cps/rest/config/JerseyConfig.java
index a7c4307ab5..44487fe068 100644
--- a/cps/cps-rest/src/main/java/org/onap/cps/rest/config/JerseyConfig.java
+++ b/cps/cps-rest/src/main/java/org/onap/cps/rest/config/JerseyConfig.java
@@ -22,8 +22,9 @@ package org.onap.cps.rest.config;
 

 import javax.annotation.PostConstruct;

 import javax.ws.rs.ApplicationPath;

+import org.glassfish.jersey.media.multipart.MultiPartFeature;

 import org.glassfish.jersey.server.ResourceConfig;

-import org.onap.cps.rest.controller.ModelController;

+import org.onap.cps.rest.controller.RestController;

 import org.springframework.context.annotation.Configuration;

 

 @Configuration

@@ -32,6 +33,7 @@ public class JerseyConfig extends ResourceConfig {
 

     @PostConstruct

     public void init() {

-        register(ModelController.class);

+        register(RestController.class);

+        register(MultiPartFeature.class);

     }

 }
\ No newline at end of file
diff --git a/cps/cps-rest/src/main/java/org/onap/cps/rest/controller/RestController.java b/cps/cps-rest/src/main/java/org/onap/cps/rest/controller/RestController.java
new file mode 100644
index 0000000000..d2f1a3e037
--- /dev/null
+++ b/cps/cps-rest/src/main/java/org/onap/cps/rest/controller/RestController.java
@@ -0,0 +1,71 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2020 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.rest.controller;
+
+import java.io.File;
+import java.io.IOException;
+import javax.ws.rs.Consumes;
+import javax.ws.rs.POST;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.Status;
+import org.glassfish.jersey.media.multipart.FormDataParam;
+import org.onap.cps.api.CPService;
+import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import org.opendaylight.yangtools.yang.model.parser.api.YangParserException;
+import org.springframework.beans.factory.annotation.Autowired;
+
+
+@Path("cps")
+public class RestController {
+
+    @Autowired
+    private CPService cpService;
+
+    @POST
+    @Path("uploadYangFile")
+    @Produces(MediaType.APPLICATION_JSON)
+    @Consumes(MediaType.MULTIPART_FORM_DATA)
+    public Response uploadFile(@FormDataParam("file") File uploadedFile) throws IOException {
+        try {
+            File fileToParse = renameFileIfNeeded(uploadedFile);
+            SchemaContext schemaContext = cpService.parseAndValidateModel(fileToParse);
+            cpService.storeSchemaContext(schemaContext);
+            return Response.status(Status.OK).entity("Yang File Parsed").build();
+        } catch (YangParserException e) {
+            return Response.status(Status.BAD_REQUEST).entity(e.getMessage()).build();
+        }
+    }
+
+    private static File renameFileIfNeeded(File originalFile) {
+        if (originalFile.getName().endsWith(".yang")) {
+            return originalFile;
+        }
+        File renamedFile = new File(originalFile.getName() + ".yang");
+        originalFile.renameTo(renamedFile);
+        return renamedFile;
+    }
+}
+
+
+
+
diff --git a/cps/cps-ri/pom.xml b/cps/cps-ri/pom.xml
index 0d6dcace4a..781f8e8326 100644
--- a/cps/cps-ri/pom.xml
+++ b/cps/cps-ri/pom.xml
@@ -1,43 +1,48 @@
 <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 https://maven.apache.org/xsd/maven-4.0.0.xsd">

-    <modelVersion>4.0.0</modelVersion>

-    <parent>

-        <groupId>org.onap.cps</groupId>

-        <artifactId>cps</artifactId>

-        <version>0.0.1-SNAPSHOT</version>

-    </parent>

-    <artifactId>cps-ri</artifactId>

-

-    <dependencies>

-

-        <dependency>

-            <groupId>org.onap.cps</groupId>

-            <artifactId>cps-service</artifactId>

-            <version>${project.version}</version>

-            <scope>compile</scope>

-        </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-validation</artifactId>

-        </dependency>

-

-        <dependency>

-            <groupId>org.mariadb.jdbc</groupId>

-            <artifactId>mariadb-java-client</artifactId>

-        </dependency>

-

-        <dependency>

-            <groupId>org.projectlombok</groupId>

-            <artifactId>lombok</artifactId>

-        </dependency>

-

-    </dependencies>

+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">

+  <modelVersion>4.0.0</modelVersion>

+  <parent>

+    <groupId>org.onap.cps</groupId>

+    <artifactId>cps</artifactId>

+    <version>0.0.1-SNAPSHOT</version>

+  </parent>

+  <artifactId>cps-ri</artifactId>

+

+  <dependencies>

+

+    <dependency>

+      <groupId>org.onap.cps</groupId>

+      <artifactId>cps-service</artifactId>

+      <version>${project.version}</version>

+    </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-validation</artifactId>

+    </dependency>

+

+    <dependency>

+      <groupId>org.mariadb.jdbc</groupId>

+      <artifactId>mariadb-java-client</artifactId>

+    </dependency>

+

+    <dependency>

+      <groupId>org.projectlombok</groupId>

+      <artifactId>lombok</artifactId>

+    </dependency>

+

+    <dependency>

+      <!-- Provides mariadb object mapping to an entity -->

+      <groupId>jakarta.persistence</groupId>

+      <artifactId>jakarta.persistence-api</artifactId>

+    </dependency>

+

+  </dependencies>

 

 </project>
\ No newline at end of file
diff --git a/cps/cps-ri/src/main/java/org/onap/cps/spi/dummy.txt b/cps/cps-ri/src/main/java/org/onap/cps/spi/dummy.txt
deleted file mode 100644
index ff2b9f30c3..0000000000
--- a/cps/cps-ri/src/main/java/org/onap/cps/spi/dummy.txt
+++ /dev/null
@@ -1 +0,0 @@
-Have a good day !
\ No newline at end of file
diff --git a/cps/cps-ri/src/main/java/org/onap/cps/spi/impl/ModelPersistencyServiceImpl.java b/cps/cps-ri/src/main/java/org/onap/cps/spi/impl/ModelPersistencyServiceImpl.java
new file mode 100644
index 0000000000..6e718c8c6b
--- /dev/null
+++ b/cps/cps-ri/src/main/java/org/onap/cps/spi/impl/ModelPersistencyServiceImpl.java
@@ -0,0 +1,46 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2020 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.spi.impl;
+
+
+import org.onap.cps.spi.impl.entities.ModuleEntity;
+import org.onap.cps.spi.ModelPersistencyService;
+import org.onap.cps.spi.repository.ModuleRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+public class ModelPersistencyServiceImpl implements ModelPersistencyService {
+
+
+    private final ModuleRepository moduleRepository;
+
+    @Autowired
+    public ModelPersistencyServiceImpl(final ModuleRepository moduleRepository) {
+        this.moduleRepository = moduleRepository;
+    }
+
+    @Override
+    public void storeModule(final String name, final String moduleContent, final String revision) {
+        final ModuleEntity moduleEntity = new ModuleEntity(name, moduleContent, revision);
+        moduleRepository.save(moduleEntity);
+
+    }
+}
diff --git a/cps/cps-ri/src/main/java/org/onap/cps/spi/impl/entities/ModuleEntity.java b/cps/cps-ri/src/main/java/org/onap/cps/spi/impl/entities/ModuleEntity.java
new file mode 100644
index 0000000000..be3dfefefc
--- /dev/null
+++ b/cps/cps-ri/src/main/java/org/onap/cps/spi/impl/entities/ModuleEntity.java
@@ -0,0 +1,63 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2020 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.spi.impl.entities;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.Table;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+
+/**
+ * Entity to store a yang module.
+ */
+@Getter
+@Setter
+@Entity
+@AllArgsConstructor
+@NoArgsConstructor
+@Table(name = "modules")
+public class ModuleEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Integer id;
+
+    @Column
+    private String name;
+
+    @Column
+    private String moduleContent;
+
+    @Column
+    private String revision;
+
+    public ModuleEntity(String name, String moduleContent, String revision) {
+        this.name = name;
+        this.moduleContent = moduleContent;
+        this.revision = revision;
+    }
+}
\ No newline at end of file
diff --git a/cps/cps-ri/src/main/java/org/onap/cps/spi/repository/ModuleRepository.java b/cps/cps-ri/src/main/java/org/onap/cps/spi/repository/ModuleRepository.java
new file mode 100644
index 0000000000..84441cbf7e
--- /dev/null
+++ b/cps/cps-ri/src/main/java/org/onap/cps/spi/repository/ModuleRepository.java
@@ -0,0 +1,30 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2020 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.spi.repository;
+
+
+import org.onap.cps.spi.impl.entities.ModuleEntity;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface ModuleRepository extends JpaRepository<ModuleEntity, Integer> {
+
+}
\ No newline at end of file
diff --git a/cps/cps-service/pom.xml b/cps/cps-service/pom.xml
index a0bf49767c..844539410c 100644
--- a/cps/cps-service/pom.xml
+++ b/cps/cps-service/pom.xml
@@ -1,4 +1,6 @@
-<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">

+<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">

   <modelVersion>4.0.0</modelVersion>

   <parent>

     <groupId>org.onap.cps</groupId>

@@ -7,36 +9,49 @@
   </parent>

   <artifactId>cps-service</artifactId>

 

-  <properties>

-        <org.opendaylight.yangtools.version>5.0.5</org.opendaylight.yangtools.version>

-    </properties>

-

   <dependencies>

 

-        <dependency>

-            <groupId>org.opendaylight.yangtools</groupId>

-            <artifactId>yang-parser-api</artifactId>

-            <version>${org.opendaylight.yangtools.version}</version>

-        </dependency>

-

-        <dependency>

-            <groupId>org.opendaylight.yangtools</groupId>

-            <artifactId>yang-parser-impl</artifactId>

-            <version>${org.opendaylight.yangtools.version}</version>

-        </dependency>

-

-        <dependency>

-            <groupId>org.opendaylight.yangtools</groupId>

-            <artifactId>yang-model-util</artifactId>

-            <version>${org.opendaylight.yangtools.version}</version>

-        </dependency>

-

-        <dependency>

-            <groupId>org.opendaylight.yangtools</groupId>

-            <artifactId>yang-data-codec-xml</artifactId>

-            <version>${org.opendaylight.yangtools.version}</version>

-        </dependency>

-

-    </dependencies>

+    <dependency>

+      <groupId>org.opendaylight.yangtools</groupId>

+      <artifactId>yang-parser-api</artifactId>

+      <version>${org.opendaylight.yangtools.version}</version>

+    </dependency>

+

+    <dependency>

+      <groupId>org.opendaylight.yangtools</groupId>

+      <artifactId>yang-parser-impl</artifactId>

+      <version>${org.opendaylight.yangtools.version}</version>

+    </dependency>

+

+    <dependency>

+      <groupId>org.opendaylight.yangtools</groupId>

+      <artifactId>yang-model-util</artifactId>

+      <version>${org.opendaylight.yangtools.version}</version>

+    </dependency>

+

+    <dependency>

+      <groupId>org.opendaylight.yangtools</groupId>

+      <artifactId>yang-data-codec-xml</artifactId>

+      <version>${org.opendaylight.yangtools.version}</version>

+    </dependency>

+

+    <dependency>

+      <groupId>org.projectlombok</groupId>

+      <artifactId>lombok</artifactId>

+    </dependency>

+

+    <dependency>

+      <!-- For logging -->

+      <groupId>org.slf4j</groupId>

+      <artifactId>slf4j-api</artifactId>

+    </dependency>

+

+    <dependency>

+      <!-- For dependency injection -->

+      <groupId>org.springframework</groupId>

+      <artifactId>spring-context</artifactId>

+    </dependency>

+

+  </dependencies>

 

 </project>
\ No newline at end of file
diff --git a/cps/cps-service/src/main/java/org/onap/cps/api/CPService.java b/cps/cps-service/src/main/java/org/onap/cps/api/CPService.java
new file mode 100644
index 0000000000..51622c3b0e
--- /dev/null
+++ b/cps/cps-service/src/main/java/org/onap/cps/api/CPService.java
@@ -0,0 +1,55 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2020 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.api;
+
+import java.io.File;
+import java.io.IOException;
+import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import org.opendaylight.yangtools.yang.model.parser.api.YangParserException;
+
+/**
+ * Configuration and persistency service interface which holds methods for parsing and storing yang models and data.
+ */
+public interface CPService {
+
+    /**
+     * Parse and validate a string representing a yang model to generate a schema context.
+     *
+     * @param yangModelContent the input stream
+     * @return the schema context
+     */
+    SchemaContext parseAndValidateModel(final String yangModelContent) throws IOException, YangParserException;
+
+    /**
+     * Parse and validate a file representing a yang model to generate a schema context.
+     *
+     * @param yangModelFile the yang file
+     * @return the schema context
+     */
+    SchemaContext parseAndValidateModel(final File yangModelFile) throws IOException, YangParserException;
+
+    /**
+     * Store schema context for a yang model.
+     *
+     * @param schemaContext the schema context
+     */
+    void storeSchemaContext(final SchemaContext schemaContext);
+
+}
diff --git a/cps/cps-service/src/main/java/org/onap/cps/api/dummy.txt b/cps/cps-service/src/main/java/org/onap/cps/api/dummy.txt
deleted file mode 100644
index ff2b9f30c3..0000000000
--- a/cps/cps-service/src/main/java/org/onap/cps/api/dummy.txt
+++ /dev/null
@@ -1 +0,0 @@
-Have a good day !
\ No newline at end of file
diff --git a/cps/cps-service/src/main/java/org/onap/cps/api/impl/CPServiceImpl.java b/cps/cps-service/src/main/java/org/onap/cps/api/impl/CPServiceImpl.java
new file mode 100644
index 0000000000..5bd6e44906
--- /dev/null
+++ b/cps/cps-service/src/main/java/org/onap/cps/api/impl/CPServiceImpl.java
@@ -0,0 +1,89 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2020 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.api.impl;
+
+
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.ServiceLoader;
+import org.onap.cps.api.CPService;
+import org.onap.cps.spi.ModelPersistencyService;
+import org.opendaylight.yangtools.yang.model.api.Module;
+import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import org.opendaylight.yangtools.yang.model.parser.api.YangParser;
+import org.opendaylight.yangtools.yang.model.parser.api.YangParserException;
+import org.opendaylight.yangtools.yang.model.parser.api.YangParserFactory;
+import org.opendaylight.yangtools.yang.model.repo.api.StatementParserMode;
+import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+public class CPServiceImpl implements CPService {
+
+    private final static Logger LOGGER = LoggerFactory.getLogger(CPServiceImpl.class);
+
+    private static final YangParserFactory PARSER_FACTORY;
+
+    static {
+        final Iterator<YangParserFactory> it =
+            ServiceLoader.load(YangParserFactory.class).iterator();
+        if (!it.hasNext()) {
+            throw new IllegalStateException("No YangParserFactory found");
+        }
+        PARSER_FACTORY = it.next();
+    }
+
+    @Autowired
+    private ModelPersistencyService modelPersistencyService;
+
+    @Override
+    public SchemaContext parseAndValidateModel(final String yangModelContent)
+        throws IOException, YangParserException {
+        final File tempFile = File.createTempFile("yang", ".yang");
+        try (BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile))) {
+            writer.write(yangModelContent);
+        } catch (IOException e) {
+            LOGGER.error("Unable to write to temporary file {}", e.getMessage());
+        }
+        return parseAndValidateModel(tempFile);
+    }
+
+    @Override
+    public SchemaContext parseAndValidateModel(final File yangModelFile) throws IOException, YangParserException {
+        final YangTextSchemaSource yangTextSchemaSource = YangTextSchemaSource.forFile(yangModelFile);
+        final YangParser yangParser = PARSER_FACTORY.createParser(StatementParserMode.DEFAULT_MODE);
+        yangParser.addSource(yangTextSchemaSource);
+        return yangParser.buildEffectiveModel();
+    }
+
+    @Override
+    public void storeSchemaContext(final SchemaContext schemaContext) {
+        for (final Module module : schemaContext.getModules()) {
+            modelPersistencyService.storeModule(module.getName(), module.toString(),
+                module.getRevision().toString());
+        }
+    }
+}
diff --git a/cps/cps-service/src/main/java/org/onap/cps/spi/ModelPersistencyService.java b/cps/cps-service/src/main/java/org/onap/cps/spi/ModelPersistencyService.java
new file mode 100644
index 0000000000..e0286c1b2f
--- /dev/null
+++ b/cps/cps-service/src/main/java/org/onap/cps/spi/ModelPersistencyService.java
@@ -0,0 +1,35 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2020 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.spi;
+
+/**
+ * Defines methods to access and manipulate data using the chosen database solution.
+ */
+public interface ModelPersistencyService {
+
+    /**
+     * Store the module from a yang model in the database.
+     * @param name
+     * @param moduleContent
+     * @param revision
+     */
+    void storeModule(final String name, final String moduleContent, final String revision);
+
+}
diff --git a/cps/cps-service/src/main/java/org/onap/cps/spi/dummy.txt b/cps/cps-service/src/main/java/org/onap/cps/spi/dummy.txt
deleted file mode 100644
index ff2b9f30c3..0000000000
--- a/cps/cps-service/src/main/java/org/onap/cps/spi/dummy.txt
+++ /dev/null
@@ -1 +0,0 @@
-Have a good day !
\ No newline at end of file
diff --git a/cps/pom.xml b/cps/pom.xml
index 94ed29c077..1c1b2b1515 100644
--- a/cps/pom.xml
+++ b/cps/pom.xml
@@ -1,115 +1,114 @@
 <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 https://maven.apache.org/xsd/maven-4.0.0.xsd">

-    <modelVersion>4.0.0</modelVersion>

-    <parent>

-        <groupId>org.onap.oparent</groupId>

-        <artifactId>oparent</artifactId>

-        <version>3.1.0</version>

-    </parent>

-    <groupId>org.onap.cps</groupId>

-    <artifactId>cps</artifactId>

-    <version>0.0.1-SNAPSHOT</version>

-    <packaging>pom</packaging>

-    <name>cps</name>

-    <description>ONAP Configuration and Persistency Service</description>

-    <organization>

-        <name>ONAP - CPS</name>

-        <url>http://www.onap.org/</url>

-    </organization>

+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">

+  <modelVersion>4.0.0</modelVersion>

+  <parent>

+    <groupId>org.onap.oparent</groupId>

+    <artifactId>oparent</artifactId>

+    <version>3.1.0</version>

+  </parent>

+  <groupId>org.onap.cps</groupId>

+  <artifactId>cps</artifactId>

+  <version>0.0.1-SNAPSHOT</version>

+  <packaging>pom</packaging>

+  <name>cps</name>

+  <description>ONAP Configuration and Persistency Service</description>

+  <organization>

+    <name>ONAP - CPS</name>

+    <url>http://www.onap.org/</url>

+  </organization>

 

-    <properties>

-        <version.java.compiler>11</version.java.compiler>

-        <springboot.version>2.3.3.RELEASE</springboot.version>

-        <onap.logging.version>1.6.7</onap.logging.version>

-        <oparent.version>3.1.0</oparent.version>

-    </properties>

+  <properties>

+    <version.java.compiler>11</version.java.compiler>

+    <springboot.version>2.3.3.RELEASE</springboot.version>

+    <oparent.version>3.1.0</oparent.version>

+    <org.opendaylight.yangtools.version>5.0.5</org.opendaylight.yangtools.version>

+  </properties>

 

-    <dependencyManagement>

-        <dependencies>

-            <dependency>

-                <groupId>org.springframework.boot</groupId>

-                <artifactId>spring-boot-dependencies</artifactId>

-                <version>${springboot.version}</version>

-                <type>pom</type>

-                <scope>import</scope>

-            </dependency>

-        </dependencies>

-    </dependencyManagement>

+  <dependencyManagement>

+    <dependencies>

+      <dependency>

+        <groupId>org.springframework.boot</groupId>

+        <artifactId>spring-boot-dependencies</artifactId>

+        <version>${springboot.version}</version>

+        <type>pom</type>

+        <scope>import</scope>

+      </dependency>

+    </dependencies>

+  </dependencyManagement>

 

-    <build>

-        <resources>

-            <resource>

-                <directory>src/main/resources</directory>

-                <filtering>true</filtering>

-            </resource>

+  <build>

+    <resources>

+      <resource>

+        <directory>src/main/resources</directory>

+        <filtering>true</filtering>

+      </resource>

 

-            <resource>

-                <directory>target/generated-sources/license</directory>

-                <includes>

-                    <include>third-party-licenses.txt</include>

-                </includes>

-            </resource>

+      <resource>

+        <directory>target/generated-sources/license</directory>

+        <includes>

+          <include>third-party-licenses.txt</include>

+        </includes>

+      </resource>

 

-            <resource>

-                <directory>target/generated-resources/licenses</directory>

-                <includes>

-                    <include>*.*</include>

-                </includes>

-                <targetPath>third-party-licenses</targetPath>

-            </resource>

-        </resources>

+      <resource>

+        <directory>target/generated-resources/licenses</directory>

+        <includes>

+          <include>*.*</include>

+        </includes>

+        <targetPath>third-party-licenses</targetPath>

+      </resource>

+    </resources>

 

-        <plugins>

-            <plugin>

-                <groupId>org.apache.maven.plugins</groupId>

-                <artifactId>maven-compiler-plugin</artifactId>

-                <configuration>

-                    <source>${version.java.compiler}</source>

-                    <target>${version.java.compiler}</target>

-                </configuration>

-            </plugin>

+    <plugins>

+      <plugin>

+        <groupId>org.apache.maven.plugins</groupId>

+        <artifactId>maven-compiler-plugin</artifactId>

+        <configuration>

+          <source>${version.java.compiler}</source>

+          <target>${version.java.compiler}</target>

+        </configuration>

+      </plugin>

 

-            <plugin>

-                <groupId>org.apache.maven.plugins</groupId>

-                <artifactId>maven-checkstyle-plugin</artifactId>

-                <executions>

-                    <execution>

-                        <id>onap-java-style</id>

-                        <goals>

-                            <goal>check</goal>

-                        </goals>

-                        <phase>process-sources</phase>

-                        <configuration>

-                            <configLocation>onap-checkstyle/onap-java-style.xml</configLocation>

-                            <sourceDirectories>${project.build.sourceDirectory}</sourceDirectories>

-                            <includeResources>true</includeResources>

-                            <includeTestSourceDirectory>true</includeTestSourceDirectory>

-                            <includeTestResources>true</includeTestResources>

-                            <consoleOutput>true</consoleOutput>

-                            <violationSeverity>warning</violationSeverity>

-                            <failsOnViolation>true</failsOnViolation>

-                        </configuration>

-                    </execution>

-                </executions>

+      <plugin>

+        <groupId>org.apache.maven.plugins</groupId>

+        <artifactId>maven-checkstyle-plugin</artifactId>

+        <executions>

+          <execution>

+            <id>onap-java-style</id>

+            <goals>

+              <goal>check</goal>

+            </goals>

+            <phase>process-sources</phase>

+            <configuration>

+              <configLocation>onap-checkstyle/onap-java-style.xml</configLocation>

+              <sourceDirectories>${project.build.sourceDirectory}</sourceDirectories>

+              <includeResources>true</includeResources>

+              <includeTestSourceDirectory>true</includeTestSourceDirectory>

+              <includeTestResources>true</includeTestResources>

+              <consoleOutput>true</consoleOutput>

+              <violationSeverity>warning</violationSeverity>

+              <failsOnViolation>true</failsOnViolation>

+            </configuration>

+          </execution>

+        </executions>

 

-                <dependencies>

-                    <dependency>

-                        <groupId>org.onap.oparent</groupId>

-                        <artifactId>checkstyle</artifactId>

-                        <version>${oparent.version}</version>

-                        <scope>compile</scope>

-                    </dependency>

-                </dependencies>

+        <dependencies>

+          <dependency>

+            <groupId>org.onap.oparent</groupId>

+            <artifactId>checkstyle</artifactId>

+            <version>${oparent.version}</version>

+          </dependency>

+        </dependencies>

 

-            </plugin>

-        </plugins>

-    </build>

+      </plugin>

+    </plugins>

+  </build>

 

-    <modules>

-        <module>cps-service</module>

-        <module>cps-rest</module>

-        <module>cps-ri</module>

-    </modules>

+  <modules>

+    <module>cps-service</module>

+    <module>cps-rest</module>

+    <module>cps-ri</module>

+  </modules>

 

 </project>
\ No newline at end of file