[DE-233] deprecated usage of VPack serializer

Author: rashtao

src/main/java/com/arangodb/ArangoDB.java

@@ -58,6 +58,8 @@
 import com.arangodb.velocystream.Request;
 import com.arangodb.velocystream.Response;
 import org.apache.http.client.HttpRequestRetryHandler;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import javax.net.ssl.HostnameVerifier;
 import javax.net.ssl.SSLContext;
@@ -91,7 +93,7 @@ public interface ArangoDB extends ArangoSerializationAccessor {
      * @author Mark Vollmary
      */
     class Builder extends InternalArangoDBBuilder {
-
+        private static final Logger logger = LoggerFactory.getLogger(Builder.class);
         private static final String PROPERTY_KEY_PROTOCOL = "arangodb.protocol";
 
         protected Protocol protocol;
@@ -672,6 +674,11 @@ public Builder serializer(final ArangoSerialization serialization) {
          * @return {@link ArangoDB}
          */
         public synchronized ArangoDB build() {
+            if (customSerializer == null) {
+                logger.warn("Usage of VelocyPack Java serialization is now deprecated for removal. " +
+                        "Future driver versions will only support Jackson serialization (for both JSON and VPACK formats). " +
+                        "Please configure according to: https://www.arangodb.com/docs/stable/drivers/java-reference-serialization.html");
+            }
             if (hosts.isEmpty()) {
                 hosts.add(host);
             }

src/main/java/com/arangodb/async/ArangoDBAsync.java

@@ -47,6 +47,8 @@
 import com.arangodb.velocypack.*;
 import com.arangodb.velocystream.Request;
 import com.arangodb.velocystream.Response;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import javax.net.ssl.SSLContext;
 import java.io.InputStream;
@@ -343,6 +345,8 @@ default CompletableFuture<Boolean> createDatabase(final String name) {
     @SuppressWarnings("unused")
     class Builder extends InternalArangoDBBuilder {
 
+        private static final Logger logger = LoggerFactory.getLogger(Builder.class);
+
         public Builder() {
             super();
         }
@@ -858,6 +862,11 @@ public Builder serializer(final ArangoSerialization serialization) {
          * @return {@link ArangoDBAsync}
          */
         public synchronized ArangoDBAsync build() {
+            if (customSerializer == null) {
+                logger.warn("Usage of VelocyPack Java serialization is now deprecated for removal. " +
+                        "Future driver versions will only support Jackson serialization (for both JSON and VPACK formats). " +
+                        "Please configure according to: https://www.arangodb.com/docs/stable/drivers/java-reference-serialization.html");
+            }
             if (hosts.isEmpty()) {
                 hosts.add(host);
             }