refactor: switching to h2 datasource

Signed-off-by: Ilya Buziuk <ibuziuk@redhat.com>

assembly/assembly-wsmaster-war/pom.xml

@@ -187,6 +187,10 @@
             <groupId>org.eclipse.che.core</groupId>
             <artifactId>che-core-db</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.eclipse.che.core</groupId>
+            <artifactId>che-core-db-vendor-h2</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.eclipse.che.core</groupId>
             <artifactId>che-core-db-vendor-postgresql</artifactId>
@@ -455,6 +459,7 @@
                                 <dep>org.everrest:everrest-core</dep>
                                 <dep>io.jsonwebtoken:jjwt-jackson</dep>
                                 <dep>io.jsonwebtoken:jjwt-impl</dep>
+                                <dep>org.eclipse.che.core:che-core-db-vendor-h2</dep>
                             </ignoredUnusedDeclaredDependencies>
                         </configuration>
                     </execution>

assembly/assembly-wsmaster-war/src/main/webapp/META-INF/context.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-    Copyright (c) 2012-2021 Red Hat, Inc.
+    Copyright (c) 2012-2023 Red Hat, Inc.
     This program and the accompanying materials are made
     available under the terms of the Eclipse Public License 2.0
     which is available at https://www.eclipse.org/legal/epl-2.0/
@@ -16,5 +16,5 @@
 
   <Resource name="jdbc/che" auth="Container"
     type="javax.sql.DataSource"
-    factory="org.eclipse.che.core.db.postgresql.PostgreSQLJndiDataSourceFactory"/>
+    factory="org.eclipse.che.core.db.h2.jpa.eclipselink.H2SQLJndiDataSourceFactory"/>
 </Context>

core/che-core-db-vendor-h2/pom.xml

@@ -22,6 +22,14 @@
     <artifactId>che-core-db-vendor-h2</artifactId>
     <name>Che Core :: Commons :: DB :: Vendor H2</name>
     <dependencies>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.eclipse.che.core</groupId>
             <artifactId>che-core-db</artifactId>

core/che-core-db-vendor-h2/src/main/java/org/eclipse/che/core/db/h2/jpa/eclipselink/H2SQLJndiDataSourceFactory.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2012-2023 Red Hat, Inc.
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *   Red Hat, Inc. - initial API and implementation
+ */
+package org.eclipse.che.core.db.h2.jpa.eclipselink;
+
+import static com.google.common.base.MoreObjects.firstNonNull;
+
+import org.eclipse.che.core.db.JNDIDataSourceFactory;
+
+public class H2SQLJndiDataSourceFactory extends JNDIDataSourceFactory {
+
+  private static final String DEFAULT_USERNAME = "username";
+  private static final String DEFAULT_PASSWORD = "password";
+  private static final String DEFAULT_URL = "jdbc:h2:file:/data/h2";
+  private static final String DEFAULT_DRIVER__CLASS__NAME = "org.h2.Driver";
+  private static final String DEFAULT_MAX__TOTAL = "20";
+  private static final String DEFAULT_MAX__IDLE = "2";
+  private static final String DEFAULT_MAX__WAIT__MILLIS = "-1";
+
+  public H2SQLJndiDataSourceFactory() throws Exception {
+    super(
+        firstNonNull(
+            nullStringToNullReference(System.getenv("CHE_JDBC_USERNAME")), DEFAULT_USERNAME),
+        firstNonNull(
+            nullStringToNullReference(System.getenv("CHE_JDBC_PASSWORD")), DEFAULT_PASSWORD),
+        firstNonNull(nullStringToNullReference(System.getenv("CHE_JDBC_H2_URL")), DEFAULT_URL),
+        firstNonNull(
+            nullStringToNullReference(System.getenv("CHE_JDBC_DRIVER__CLASS__NAME")),
+            DEFAULT_DRIVER__CLASS__NAME),
+        firstNonNull(
+            nullStringToNullReference(System.getenv("CHE_JDBC_MAX__TOTAL")), DEFAULT_MAX__TOTAL),
+        firstNonNull(
+            nullStringToNullReference(System.getenv("CHE_JDBC_MAX__IDLE")), DEFAULT_MAX__IDLE),
+        firstNonNull(
+            nullStringToNullReference(System.getenv("CHE_JDBC_MAX__WAIT__MILLIS")),
+            DEFAULT_MAX__WAIT__MILLIS));
+    ;
+  }
+}