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Application Development with PAS for OpenEdge

Secondary performance considerations

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Table of Contents
  • PAS for OpenEdge and Client Interaction
    • Understand application models
      • Application model context management
      • Application model performance
    • Application models and Open Client Objects
    • Choose the application model
    • Context management and the session-free model
    • Decide the scope of individual requests
    • Understand synchronous and asynchronous requests
      • Process control flow
      • Specifying the type of remote request
      • Handling asynchronous request results
      • Asynchronous request queuing
      • Understanding the session-managed queuing model
      • Understanding the session-free queuing model
      • Asynchronous requests and internal procedures
      • Tuning the size of the send and response queues
  • Programming the Progress Application Server for OpenEdge
    • Programming for a PAS for OpenEdge application model
      • Session-free programming
        • Affecting application scalability
        • SESSION handle attributes and session-free programming
      • Session-managed programming
    • ABL for programming PAS for OpenEdge procedures
    • Accessing the connection ID
    • Accessing the name of the current remote procedure
      • Accessing a procedure name on PAS for OpenEdge
    • Using PAS for OpenEdge event procedures
      • Startup and Shutdown procedures
        • Multi-session Agent Startup procedure
        • Multi-session Agent Shutdown procedure
        • Session Startup procedure
        • Session Shutdown procedure
        • Usage requirements
      • Connect and Disconnect procedures
        • Connect procedure
        • Disconnect procedure
        • Usage requirements
      • Activate and Deactivate procedures
        • Activate procedure
        • Deactivate procedure
        • Usage requirements
    • Controlling PAS for OpenEdge entry points
      • Export list operation
      • Setting and resetting the export list
      • Calling the EXPORT( ) method
        • Setting an initial export list
        • Resetting the export list
      • Resolving remote procedure names
    • Manage context for bound and unbound session-managed connections
      • Use the SERVER-CONNECTION-CONTEXT attribute
      • Use the SERVER-CONNECTION-ID attribute
      • Use the SERVER-CONNECTION-BOUND-REQUEST
        • Bound connections
        • Unbound connections
      • Use the SERVER-CONNECTION-BOUND attribute
    • Manage client context for session-free and unbound session-managed connections
      • Pass the client context identifier between client and server
      • Generate a client context identifier
      • Manage context from the server with OERequestInfo objects
      • Implementing multi-tier security models
    • Understanding remote procedure handles
      • Remote procedure handles
      • Deleting remote procedures
    • Handling conditions and returning values
      • Raising the ERROR condition and returning values
      • Throwing error objects to the client
      • Raising the ENDKEY condition
      • Handling the STOP condition
        • Raising a timed STOP
      • Handling the QUIT condition
      • Effects of unhandled conditions
    • Managing transactions
      • Types of a PAS for OpenEdge instance transactions
        • Normal ABL transactions
        • Automatic transactions
      • Implementing normal ABL transactions
      • Implementing automatic transactions
        • Initializing the automatic transaction object
        • Controlling the transaction
        • Terminating automatic transactions
        • Restarting automatic transactions
        • Automatic transaction example
    • Programming for Open Client applications
      • Using the ProtoGen utility
      • Using code editors
  • Programming ABL Client Applications
    • Programming for the application model
    • ABL for programming PAS for OpenEdge client procedures
    • Accessing PAS for OpenEdge resources from a client
      • Steps for accessing PAS for OpenEdge resources
      • Features of client-PAS for OpenEdge interactions
    • Connecting to a PAS for OpenEdge instance
      • Creating a server object handle
      • Establishing a connection with the CONNECT( ) method
        • Connection parameters argument
        • Connection URL syntax for the APSV transport
        • Session-managed application arguments
      • Connection examples
        • Connecting to a session-managed PAS for OpenEdge instance
        • Connecting to a session-free PAS for OpenEdge instance
    • Accessing the connection ID on a session-managed client
    • Accessing client context regardless of application model
      • Managing context from the ABL client with OERequestInfo objects
    • Running and managing remote procedures
      • Running remote procedures
        • Synchronous remote procedures
        • Asynchronous remote procedures
        • RUN statement options for remote procedures
        • Passing class-based objects as parameters between a server and ABL client
        • Remote procedure behavior
      • Understanding proxy procedure handles
        • Accessing proxy procedure handles
        • Comparing proxy and local procedure handles
      • Deleting remote persistent procedures
      • Remote procedure code examples
        • Example 1: Remote non-persistent procedure example
        • Example 2: Remote persistent procedure example
        • Example 3: Remote persistent procedure example using the FUNCTION statement
        • Example 4: Remote non-persistent procedure with a class-based object as a parameter
    • Disconnecting from a PAS for OpenEdge instance
      • Using the DISCONNECT( ) method
      • Disconnecting a session-managed client
      • Disconnecting a session-free client
      • Deleting the server handle
    • Handling conditions and return values
      • Raising the STOP condition
      • Handling conditions on the RUN statement
      • Using the RETURN-VALUE function across sessions
    • Managing asynchronous requests
      • Executing an asynchronous request
        • Asynchronous request handles
      • Handling the response from an asynchronous request
        • PROCEDURE-COMPLETE events
        • Event procedures or methods
        • Obtaining error information
        • Obtaining parameter values
        • Obtaining the return value
      • Canceling asynchronous requests
      • Canceling asynchronous requests after a specified time
        • Examples
      • Asynchronous requests and persistent procedures
      • Deleting asynchronous remote persistent procedures
      • Deleting server handles
      • Deleting asynchronous request handles
      • Mixing synchronous and asynchronous requests
      • Running asynchronous requests on the SESSION system handle
      • Examples
        • Synchronous request execution model
        • Asynchronous request execution model
        • A complete asynchronous request example
  • Design and Implementation Considerations
    • Primary performance considerations
      • Minimizing network traffic
      • Off loading resource-intensive processing tasks
      • Choosing an application model
        • Application characteristics to consider
        • Managing larger amounts of context
        • Managing smaller amounts of context
        • Considering ample computer resources
        • Considering the future
      • Setting the number of multi-session agents, sessions, and connections
      • Choosing a transaction model
      • Using load balancing
    • Secondary performance considerations
      • Connect and disconnect performance issues
        • Using the PAS for OpenEdge Server Connect procedure
        • Performance-related issue for the CONNECT( ) method
        • Performance-related issues for the DISCONNECT( ) method
      • Compiled compared to precompiled code
      • ABL browse design considerations
      • Performance issues related to schema transmission
      • Garbage collection for class-based objects
    • Transaction and record management considerations
      • Comparing normal ABL and automatic transactions
      • Ensuring a small transaction size
      • Returning transaction status to the client
      • Maintaining transaction consistency between client and server
      • Managing conflicts between client and server
        • On the client
        • On the server
      • Buffer currency and NO-LOCK
        • Reading the current record
        • Releasing the record
        • Setting the -rereadnolock parameter
    • Deployment considerations
      • Minimizing the effects of schema changes
      • Advantages of using portable r-code
    • Security considerations
      • Overview of the server security options
      • User authentication and authorization
        • Authorization over a bound session-managed connection
        • Authorization over an unbound session-managed or session-free connection
      • Database access
      • PAS for OpenEdge session access
        • Application model interactions
        • How to set and reset an export list for each application model
        • Session-managed application with a bound connection
        • Session-managed application with an unbound connection
        • Session-free application
      • Audit trails
        • PAS for OpenEdge application audit trails
        • Client application audit trails
      • Digital certificate management
    • Multi-language support
    • Distributed application design and implementation
      • Understanding the scope of persistent, single-run, and
      • Cleanup of remote procedure instances
      • Understanding procedure handles in distributed ABL
        • REMOTE attribute
        • PERSISTENT, SINGLE-RUN, and SINGLETON attributes
        • PROXY attribute
        • How the attributes work together
      • Understanding condition handling in distributed ABL sessions
      • Schema triggers
      • Conditions that make migrating your application model
Table of Contents

Secondary performance considerations

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  • Last Updated: January 16, 2024
  • 1 minute read
    • OpenEdge
    • Version 12.8
    • Documentation

This section highlights additional specific performance considerations that you should review and understand as you design and implement an application using PAS for OE.

Contents
  • Connect and disconnect performance issues
  • Compiled compared to precompiled code
  • ABL browse design considerations
  • Performance issues related to schema transmission
  • Garbage collection for class-based objects
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