D_B2IController
, D_BaseContainerHandle
, D_BTreeController
, D_ContainerKey
, D_ContainerLock
, D_FlushedScan
, D_HeapController
, D_LockControl
, D_LogToFile
, D_RecordId
, D_RowLock
, D_StoredPage
, D_Xact
, DiagnosticableGeneric
public interface Diagnosticable
Modifier and Type | Method | Description |
---|---|---|
java.lang.String |
diag() |
Default implementation of diagnostic on the object.
|
void |
diag_detail(java.util.Properties prop) |
Default implementation of detail diagnostic on the object.
|
void |
init(java.lang.Object obj) |
void init(java.lang.Object obj)
java.lang.String diag() throws StandardException
This routine returns a string with whatever diagnostic information you would like to provide about this associated object passed in the init() call.
This routine should be overriden by a real implementation of the diagnostic information you would like to provide.
StandardException
- Standard Derby exception policyvoid diag_detail(java.util.Properties prop) throws StandardException
This interface provides a way for an object to pass back pieces of information as requested by the caller. The information is passed back and forth through the properties argument. It is expected that the caller knows what kind of information to ask for, and correctly handles the situation when the diagnostic object can't provide the information.
As an example assume an object TABLE exists, and that we have created an object D_TABLE that knows how to return the number of pages in the TABLE object. The code to get that information out would looks something like the following:
print_num_pages(Object table) { Properties prop = new Properties(); prop.put(Page.DIAG_NUM_PAGES, ""); DiagnosticUtil.findDiagnostic(table).diag_detail(prop); System.out.println( "number of pages = " + prop.getProperty(Page.DIAG_NUM_PAGES)); }
This routine should be overriden if there is detail diagnostics to be provided by a real implementation.
StandardException
- Standard Derby exception policyApache Derby V10.14 Internals - Copyright © 2004,2018 The Apache Software Foundation. All Rights Reserved.