OAK-11416: Docker support for oak-jcr tests with RdbDocumentStore needs a way to specify environment variables for the container

Implemented.

Author: mbaedke

oak-store-document/src/test/java/org/apache/jackrabbit/oak/plugins/document/RdbConnectionUtils.java

@@ -31,6 +31,11 @@
 import java.sql.SQLException;
 import java.time.Duration;
 import java.time.Instant;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.StringTokenizer;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
 import java.util.regex.Matcher;
@@ -44,6 +49,7 @@ public class RdbConnectionUtils {
     public static final String USERNAME = System.getProperty("rdb.jdbc-user", "sa");
     public static final String PASSWD = System.getProperty("rdb.jdbc-passwd", "");
     public static final String IMG = System.getProperty("rdb.docker-image", "");
+    public static final Map<String, String> ENV = parseDockerEnv(System.getProperty("rdb.docker-env", ""));
 
     private static final boolean RDB_AVAILABLE;
     private static GenericContainer<?> rdbContainer;
@@ -67,6 +73,7 @@ public class RdbConnectionUtils {
         if (RDB_AVAILABLE) {
             rdbContainer = new GenericContainer<>(DockerImageName.parse(IMG))
                     .withPrivilegedMode(true)
+                    .withEnv(ENV)
                     .withExposedPorts(exposedPort)
                     .withStartupTimeout(Duration.ofMinutes(15));
             try {
@@ -148,4 +155,22 @@ private static boolean checkImageAvailability() throws TimeoutException {
     private static boolean checkDockerAvailability() {
         return DockerClientFactory.instance().isDockerAvailable();
     }
+
+    private static Map<String, String> parseDockerEnv(String raw) {
+        if (StringUtils.isEmpty(raw)) {
+            return Collections.emptyMap();
+        }
+        Map<String, String> result = new HashMap<>();
+        StringTokenizer envTokenizer = new StringTokenizer(raw, ",");
+        while (envTokenizer.hasMoreTokens()) {
+            String token = envTokenizer.nextToken().trim();
+            StringTokenizer varTokenizer = new StringTokenizer(token, "=");
+            if (varTokenizer.countTokens() == 2) {
+                result.put(varTokenizer.nextToken(), varTokenizer.nextToken());
+            } else {
+                LOG.warn("Ignoring unexpected format of docker container environment variable: {}.", token);
+            }
+        }
+        return result;
+    }
 }