Custom Hooks in TierDeveloper

Custom Hooks is another powerful and most demanding feature provided by TierDeveloper. Custom Hooks work like database triggers. It could be your own business logic that you can activate before or after performing some database actions. PreHooks and PostHooks are two ways, provided by TierDeveloper, through which you can embed your own logic in the generated code. Pre hook methods are called before the database access is performed whereas post hook methods are called after the database operations are performed.

Custom hooks can be specified wherever database access is performed. It includes standard operations, query methods, bulk operations and custom operations. User can generate skeleton code for custom hooks of the selected methods or he/she can use his/her own hooks class.

For your convenience and better understanding I have listed sample code here which shows how TierDeveloper embed custom hooks in the generated code. It is pretty self-explanatory.

public void UpdateCustomerInfoCustomers objInfo

{

try

{

... ... .... .......

... ... .... .......



CustomersHooks hooks = new CustomersHooks;

status = hooks.PreUpdateCustomerInfoSystem.Data.SqlClient.SqlConnectiongetConnection, objInfo;



if status != CustomersHooks.SUCCESS_CONTINUE

{

SetStatusstatus == CustomersHooks.FAIL_NONCONTINUE  EStatus.eFail : EStatus.eSuccess;

ReleaseCommand;

return;

}



AddCmdParameter"@CompanyName", TDevFramework.EDataType.eVarchar, objInfo.CompanyName, TDevFramework.EParamDirection.eInput, objInfo.IsNull"CompanyName";

... ... .... .......

... ... .... .......

... ... .... .......



ExecuteNonQuery;



status = hooks.PostUpdateCustomerInfoSystem.Data.SqlClient.SqlConnectiongetConnection, objInfo;



if status != CustomersHooks.SUCCESS_CONTINUE

{

... ... .... .......

... ... .... .......

return;

}



SetStatusEStatus.eSuccess;

ReleaseCommand;

}

catch Exception e

{

... ... .... .......

... ... .... .......

throw e;

}

}



public class CustomersHooks

{

public const int SUCCESS_CONTINUE = 0;

public const int SUCCESS_NONCONTINUE = 1;

public const int FAIL_NONCONTINUE = 2;



public int PreUpdateCustomerInfo System.Data.SqlClient.SqlConnection Conn, Customers objInfo

{

//.. .. .. . .. .. 

// . .. .. .. .. Put your own code here

return SUCCESS_CONTINUE;

}



public int PostUpdateCustomerInfo System.Data.SqlClient.SqlConnection Conn, Customers objInfo

{

	// .. .. .. .. . .. .. .. 

	//	.. ..	 .. .. put your own code here.

return SUCCESS_CONTINUE;

}

}

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