Data access pool + Service plug-in configuration + database configuration

01. Data Access Object Pool Tdbapool

A. Assigning Access objects: Dbapool.allocateobject; Create a new one every time

B. Return to the object of Access: Dbapool.releaseobject (tdbaccess); Release and log Out

C. Number of allocated objects: dbapool.allocatedobjects;

02. Processing of server-side database configuration information: Tdbconfig

A. Taking the existing registered database information: dbconfig.fetchdatabaselist (var cds:tclientdataset)

B. Registering a new database: Dbconfig.adddatabase (Tdatabaserecord)

-----configured with the TDATABASERECORD structure-----------------parameter names when Qbparcel parameters are taken---------

Tdatabaserecord.databaseid ==> database Access ID-DatabaseID ==> String

Tdatabaserecord.databasedesc==> Database Description--Databasedesc ==> String

Tdatabaserecord.databasetype==> database Type--DatabaseType ==> Integer

Tdatabaserecord.databaseprovider ==> Service Object--Databaseprovider ==> String

Tdatabaserecord.databaseconnectstring ==> Connection string--connectstring ==> string

C. Modify the registered database configuration information: Dbconfig.updatedatabase (Database access ID, Tdatabaserecord);

D. Unregister the registered database configuration information: Dbconfig.removedatabase (database access ID);

E. Extracting registered Database configuration information: Dbconfig.getdatabaseproperty (Database access ID, tqbparcel)

F. Testing registered Database configuration information: Dbconfig.testdatabase (Database access ID)

G. Tests for unregistered database connections: dbconfig.testdatabase (Service object, connection string)

03. Processing of service-side service plug-in configuration information: Tdllplugin

A. Extraction of service plug-in information: Dllplugin.fetchpluginlist (Fcds:tclientdataset)

B. Register a new plugin: Dllplugin.addplugin (Tpluginrecord);

-----Configure------------Qbparcel corresponding parameters using the TPLUGINRECORD structure-----

Tpluginrecord.pluginid ==> Module Identification ==> pluginID

Tpluginrecord.plugindesc==> Module Description ==> Plugindesc

Tpluginrecord.pluginfilename==> Module name ==> pluginfilename

tpluginrecord.pluginpassword==> Module Password ==> pluginpassword

tpluginrecord.pluginthreadmode=> Threading Mode ==> Pluginthreadmode

Whether the tpluginrecord.pluginexecmode=> resides in memory = = Pluginexecmode

tpluginrecord.plugindbsupport==> Need database support = Plugindbsupport

C. Modification of registered plug-in information: Dllplugin.updateplugin (module ID, Tpluginrecord)

D. Removal of registered plugin information: dllplugin.removeplugin (module ID)

E. Extraction of registered plug-in information: Dllplugin.getpluginproperty (module ID, tqbparcel)

F. Invocation of the service plug-in function: DLLPLUGIN.BINARYRPC (module ID, password, enter parameter qbparcel, return parameter qbparcel);

Data access pool + Service plug-in configuration + database configuration