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    Developer Guide

        1. Todo Validation
      2. Release Your User Login
      1. Process Reporting API
        1. CSS Examples
        2. CSS Personalization
      2. Performance
        1. List Reinitialization
        2. Holidays
        3. Number Currency Format
        4. Label Modification
        5. Array From WS
        6. Launch Process JQuery
        7. Column Inactivation
        8. Date
        9. Print JSONObject
        10. ArrayJSON to JSONArray
        11. Invalid Fields
        12. Round
        13. Initialization Widget Date
        14. JQuery
        15. Inject JSONObject
        16. Google Tables
        1. Summing Array
        2. API Listener
        3. User Lane Picker
        4. Retrieving Variables Values
          1. Chart Dashboard
          2. Report Chart
          3. Google Visualization
          4. Chart Dashboard Collection
        6. Tags
        7. Collection
        8. File Preview
        9. Dynamic List
        10. Dialog Window
        11. JavaScript Report
        12. Autocomplete Widget
          1. homepage.js
          2. homepage.css
        2. Logout
        3. Custom Login Page
        4. Header
        5. Mobile Devices
        6. Basket
        7. Redirection ExecutionMode
        8. Menu Bar
        9. Information Tags
      1. Composite API Example
      1. Markdown Template
        1. Task Reminder Email
        2. SubProcess
        3. PDF
        4. JavaScript Inclusion
        5. Variable Mapping
        6. Backloop
      3. Trigger
        1. File Visibility
        2. Number Currency Format
        3. Error Handling
        4. JSONObject Concatenation
        5. Loop
        6. Dynamic Variable
        7. List 1000+ Objects
        8. Metadata
        9. Freemarker Container Test
        10. JSONObject Keys Values
        11. List Hash Sequence
        12. Special Freemarker Characters
        13. Salesforce Computation
        14. Array To List
        15. JSONArray Conversion
        16. Lock
        17. JSONObject Creation
        18. Number Test
      1. Customer Management
        1. Messages
        2. Scheduled Process
          1. Roles Entities
          2. Organization
          1. Project Definition
          2. Versions
          3. New Version
          4. Version Management Log
          5. Access Rights
          6. Collections
          7. Versioned Files
          8. Files
          9. Description
            1. Report Widget
            2. List Widget
            3. JavaScript Widget
            4. History Widget
            5. RadioButton Widget
            6. FileUpload Widget
            7. StaticText Widget
            8. HTML Editor Widget
            9. ProgressBar Widget
            10. Section Widget
            11. Spinner Widget
            12. Image Widget
            13. Multi Checkbox Widget
            14. Tab Widget
            15. Tree Widget
            16. HTML Widget
            17. Checkbox Widget
            18. Button Widget
            19. Custom Widget
            20. URLInput Widget
            21. TextInput Widget
            22. Array Widget
            23. Captcha Widget
            24. Geolocation Widget
          2. Implementation
          3. Design
          4. Collections
          5. Stylesheet
          6. JavaScript
          7. API Listener
          8. Google Analytics
          1. Process Design
            1. Gate
            2. Process Step Output Variables
              1. Process Task Functional Tab
              2. Process Task Connector Tab
              3. Process Task Script Tab
              4. Process Task Loop Tab
              5. Process Task SubProcess Tab
              6. Process Task Manual Tab
              7. Process Task Email Tab
            4. Process Step Input Variables
            5. Process Step Testing Variables
              1. Process Intermediary Event
              2. Process Start Event
              3. Process Timer Event
          3. General
          4. Input
          5. Variables
          6. Measures
          1. Connectors
          2. Processes
          3. Providers
        6. Custom Lists
        7. Collections
          1. Design
          2. Configuration
        9. Revision
        1. My Applications
        2. Files
        3. Home
        1. Process Examples
        2. Connectors
        1. Web Interface Reports
          1. Execution Path
          2. Measuring
          3. Parameters
          4. Runtime Users
        1. Configuration
        2. Users
        3. Usage
      1. Mobile
      2. Offline
      1. Collections BackOffice
      2. Collections To List
      3. Collections To Array
      4. Collection JS Freemarker
      1. Access Rights
      2. Delegation
      3. Compound Organization Hierarchy
      4. Dynamic Lanes
      5. Scripted Lanes
      6. Runtime Lanes

    How to deal with concurrent access to a file

    Code 

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    ${lock("mylock",5000)}
<#-- my freemarker code / my webservices to call -->
<#-- writing in a file, updating a custom list -->
${unlock ("mylock")}