new MongoDB(message_obj)
    Represents db related opertions of various classes.
    Parameters:
| Name | Type | Description | 
|---|---|---|
message_obj | 
            
            Message | 
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Members
(private, inner) first_bot_count :boolean
    boolean counter to initialize the old_bot_count in first comparision.
    Type:
- boolean
 
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(private, inner) old_bot_count :Number
    Used for comparing old bot count and new bot count. To message changes in the cluster.
    Type:
- Number
 
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(private, inner) tika_indexer_busy :boolean
    boolean counter for tika indexer busy.
    Type:
- boolean
 
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Methods
insertAuthor(data)
    Insert author data into db.
    Parameters:
| Name | Type | Description | 
|---|---|---|
data | 
            
            Object | 
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(private, inner) generateMD5(str)
    Generates MD5 hash of any string
    Parameters:
| Name | Type | Description | 
|---|---|---|
str | 
            
            String | 
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