Error Trapping In Cache
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Error Processing ] Go to: The TRY-CATCH Mechanism %Status Error Processing Traditional Error Processing Search: Managing the behavior of Caché when an error occurs is called error processing or error handling. Error processing performs one or more of the following functions: Correcting the condition that caused the error Performing some action that allows execution to resume despite the error Diverting the flow of execution Logging information about the error Caché supports three types of error processing, which can be used simultaneously. These are: The TRY-CATCH mechanism %Status error code http://stackoverflow.com/questions/198941/how-to-really-trap-all-errors-with-etrap-in-intersystems-cach%C3%A9 processing Traditional error processing ($ZTRAP and $ETRAP) Important: The preferred mechanism for Caché ObjectScript error handling is the TRY-CATCH mechanism. If traditional error processing is to be used, the $ZTRAP mechanism is preferred. Use of $ETRAP is discouraged. The TRY-CATCH Mechanism Caché supports a TRY-CATCH mechanism for handling errors. With this mechanism, you can establish delimited blocks of code, each called a http://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY=GCOS_errors TRY block; if an error occurs during a TRY block, control passes to the TRY block’s associated CATCH block, which contains code for handling the exception. A TRY block can also include THROW commands; each of these commands explicitly issues an exception from within a TRY block and transfers execution to a CATCH block. To use this mechanism in its most basic form, include a TRY block within ObjectScript code. If an exception occurs within this block, the code within the associated CATCH block is then executed. The form of a TRY-CATCH block is: TRY { protected statements } CATCH [ErrorHandle] { error statements } further statements where: The TRY command identifies a block of Caché ObjectScript code statements enclosed in curly braces. TRY takes no arguments. This block of code is protected code for structured exception handling. If an exception occurs within a TRY block, Caché sets the exception properties (oref.Name, oref.Code, oref.Data, and oref.Location), $ZERROR, and $ECODE, then transfers execution to an exception handler, identified by the CATCH command. This is known as throwing an exception. The protected statements are ObjectScri
resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners ISV Startups TechRewards Events https://msdn.microsoft.com/en-us/library/ff637738(v=azure.10).aspx Community Magazine Forums Blogs Channel 9 Documentation APIs and reference Dev centers Retired content Samples We’re sorry. The content you requested has been removed. You’ll be auto redirected in 1 second. AppFabric Caching Features Developing a Cache Client Handling Errors Handling Errors Exception Handling Overview Exception Handling Overview Exception Handling Overview error trapping Exception Handling Overview Common Exceptions Configuring Cache Client Timeouts TOC Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. Exception Handling Overview (Windows Server AppFabric Caching) The caching API of Windows Server AppFabric error trapping in throws .NET exceptions when errors occur. This topic reviews basic error handling concepts and provides an example. The DataCacheException Class A common DataCacheException object is thrown for errors that are specific to the AppFabric caching methods. The DataCacheException object contains four properties that can help you diagnose the cause of the exception: DataCacheException property Description Message A string that describes the error. ErrorCode An integer value that corresponds to an error code constant in the DataCacheErrorCode class. SubStatus An integer value that corresponds to a sub-status constant in the DataCacheErrorSubStatus class. InnerException An exception instance that caused the current exception. This value can be null. Some failures, such as a timeout, can occur from any cache client method. Your application code should be prepared to handle these common exceptions. For more information, see Common Exceptions (Windows Server AppFabric Caching). Note Some failures do not throw an exception. For example, the Get method returns
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