AydarZaynutdinov commented on a change in pull request #16611:
URL: https://github.com/apache/beam/pull/16611#discussion_r802746575



##########
File path: playground/backend/internal/utils/cache_utils.go
##########
@@ -32,3 +33,14 @@ func SetToCache(ctx context.Context, cacheService 
cache.Cache, key uuid.UUID, su
        }
        return err
 }
+
+// ReadAndSetToCacheGraph read graph from file and writes it to the cache.
+func ReadAndSetToCacheGraph(ctx context.Context, cacheService cache.Cache, 
pipelineId uuid.UUID, graphPath string) error {

Review comment:
       Maybe rename this method to `SaveGraph`?

##########
File path: playground/backend/internal/preparers/python_preparers.go
##########
@@ -47,7 +61,17 @@ func (builder *PreparersBuilder) PythonPreparers() 
*PythonPreparersBuilder {
 func (builder *PythonPreparersBuilder) WithLogHandler() 
*PythonPreparersBuilder {
        addLogHandler := Preparer{
                Prepare: addCodeToFile,
-               Args:    []interface{}{builder.filePath, addLogHandlerCode},
+               Args:    []interface{}{builder.filePath, saveLogs},
+       }
+       builder.AddPreparer(addLogHandler)
+       return builder
+}
+
+//WithGraphHandler adds code to save the graph
+func (builder *PythonPreparersBuilder) WithGraphHandler() 
*PythonPreparersBuilder {
+       addLogHandler := Preparer{
+               Prepare: addCodeToFile,
+               Args:    []interface{}{builder.filePath, saveGraph},
        }
        builder.AddPreparer(addLogHandler)

Review comment:
       ```suggestion
        addGraphHandler := Preparer{
                Prepare: addCodeToFile,
                Args:    []interface{}{builder.filePath, saveGraph},
        }
        builder.AddPreparer(addGraphHandler)
   ```

##########
File path: playground/backend/internal/preparers/preparers_utils/utils.go
##########
@@ -0,0 +1,158 @@
+// Licensed to the Apache Software Foundation (ASF) under one or more

Review comment:
       Lets move it to `internal/utils/preparers_utils.go` file.




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