workaround to keep backward compatibility

ebulk-data/embulk-wendelin-dataset-tool/lib/embulk/wendelin_client.rb

@@ -185,11 +185,15 @@ class WendelinClient
   end
 
   def getDataStreamList(data_set_reference, data_stream_count, batch_size)
+    #keep backward compatibility
+    if data_stream_count = -1
+      return getDataStreams(data_set_reference)
+    end
     data_stream_list = []
     total_batches = data_stream_count/batch_size.ceil()
     if total_batches > 4
       puts
-      @logger.warn("Due to its size, the remote file list will be fetch in batches. This could take some minutes.", print=TRUE)
+      @logger.info("Due to its size, the remote file list will be fetch in batches. This could take some minutes.", print=TRUE)
     end
     nbatch = 0
     while nbatch <= total_batches
@@ -234,19 +238,24 @@ class WendelinClient
     return {'status_code': 0, 'result': []}
   end
 
-
   def getDataStreamCount(data_set_reference)
     uri = URI(URI.escape("#{@erp5_url}ERP5Site_getDataStreamCount?data_set_reference=#{data_set_reference}"))
     response = handleRequest(uri)
     if response["success"] == FALSE
+      #keep backward compatibiliy if script doesn't exist in wendelin instance
+      if response["message"] == 404
+        @logger.info("Continue with backward compatibility...", print=TRUE)
+        return {"status_code"=>0, "result"=>-1}
+      else
         @logger.abortExecution()
       end
+    end
     str = response["message"]
     if not str.nil?
     str.gsub!(/(\,)(\S)/, "\\1 \\2")
         return YAML::load(str)
     end
-    return {'status_code': 0, 'result': 0}
+    return {"status_code"=>0, "result"=>0}
   end
 
   private
@@ -300,6 +309,8 @@ class WendelinClient
         elsif res.code == '400'
           @logger.error(HTTP_MESSAGE_400, print=TRUE)
           @logger.abortExecution()
+        elsif res.code == '404'
+          return {"success"=>FALSE, "message"=>404}
         else
           @logger.error(HTTP_MESSAGE_OTHER, print=TRUE)
         end