set default values for compression flags

Author: chernser

client-v2/src/main/java/com/clickhouse/client/api/Client.java

@@ -554,7 +554,7 @@ public Builder setSocketLinger(int secondsToWait) {
 
         /**
          * Server response compression. If set to true server will compress the response.
-         * Has most effect for read operations.
+         * Has most effect for read operations. Default is true.
          *
          * @param enabled - indicates if server response compression is enabled
          */
@@ -565,7 +565,7 @@ public Builder compressServerResponse(boolean enabled) {
 
         /**
          * Client request compression. If set to true client will compress the request.
-         * Has most effect for write operations.
+         * Has most effect for write operations. Default is false.
          *
          * @param enabled - indicates if client request compression is enabled
          */
@@ -577,7 +577,7 @@ public Builder compressClientRequest(boolean enabled) {
         /**
          * Configures the client to use HTTP compression. In this case compression is controlled by
          * http headers. Client compression will set {@code Content-Encoding: lz4} header and server
-         * compression will set {@code Accept-Encoding: lz4} header.
+         * compression will set {@code Accept-Encoding: lz4} header. Default is false.
          *
          * @param enabled - indicates if http compression is enabled
          * @return
@@ -1079,6 +1079,18 @@ private void setDefaults() {
                 useHTTPBasicAuth(true);
             }
 
+            if (!configuration.containsKey(ClientConfigProperties.COMPRESS_CLIENT_REQUEST.getKey())) {
+                compressClientRequest(false);
+            }
+
+            if (!configuration.containsKey(ClientConfigProperties.COMPRESS_SERVER_RESPONSE.getKey())) {
+                compressServerResponse(true);
+            }
+
+            if (!configuration.containsKey(ClientConfigProperties.USE_HTTP_COMPRESSION.getKey())) {
+                useHttpCompression(false);
+            }
+
             String userAgent = configuration.getOrDefault(ClientConfigProperties.HTTP_HEADER_PREFIX + HttpHeaders.USER_AGENT.toUpperCase(Locale.US), "");
             String clientName = configuration.getOrDefault(ClientConfigProperties.CLIENT_NAME.getKey(), "");
             httpHeader(HttpHeaders.USER_AGENT, buildUserAgent(userAgent.isEmpty() ? clientName : userAgent));