Package io.higson.runtime.profiler.callstack

Class DiagnosticAttributeInterceptor

java.lang.Object

io.higson.runtime.profiler.callstack.DiagnosticAttributeInterceptor

All Implemented Interfaces:

AttributeInterceptor

public class DiagnosticAttributeInterceptor
extends Object
implements AttributeInterceptor

Diagnostic (profiling) implementation of AttributeInterceptor.

Wraps every domain-attribute resolution in a DOMAIN_ATTRIBUTE call-stack frame. When the attribute is the top-level entry point (stack empty before push) the collected events are aggregated into a summary and handed to the DiagnosticCallStackFlushStrategy. The strategy decides whether to dispatch the report to the diagnostic queue (production) or preserve the stack for later inspection (tester).

An optional delegate AttributeInterceptor may be supplied at construction time: its getValue is called inside the diagnostic frame instead of going directly to the resolver — so all engine calls made by the user interceptor are captured as children of the DOMAIN_ATTRIBUTE frame. When no delegate is supplied a no-op one is used (it forwards straight to the resolver), so chaining is allocation-free per call.

The elementName recorded in the frame is built as objectPath + "{" + attrCode + "}", e.g. "/vehicles/car{RATE}", using DomainAttribute.getDomainObject() and its getPath() method. The attribute code is wrapped in {} to visually distinguish it from path segments.

Registered by HigsonEngineFactory only when profilerEnabled = true.

Constructor Summary

Constructors

Constructor	Description
DiagnosticAttributeInterceptor(DiagnosticCallStackFlushStrategy flushStrategy, String instanceId)
DiagnosticAttributeInterceptor(DiagnosticCallStackFlushStrategy flushStrategy, String instanceId, AttributeInterceptor delegate)

Method Summary

Modifier and Type	Method	Description
ParamValue	getValue(AttributeValueResolver resolver, DomainAttribute attr, ParamContext ctx, Object... args)	This method allows provide custom handling of parameters for domain attributes.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DiagnosticAttributeInterceptor

public DiagnosticAttributeInterceptor(DiagnosticCallStackFlushStrategy flushStrategy,
 String instanceId)

DiagnosticAttributeInterceptor

public DiagnosticAttributeInterceptor(DiagnosticCallStackFlushStrategy flushStrategy,
 String instanceId,
 AttributeInterceptor delegate)

Method Details

getValue

public ParamValue getValue(AttributeValueResolver resolver,
 DomainAttribute attr,
 ParamContext ctx,
 Object... args)

Description copied from interface: AttributeInterceptor

This method allows provide custom handling of parameters for domain attributes.

Specified by:

getValue in interface AttributeInterceptor

Parameters:

resolver - attribute value resolver

attr - attribute from which value and type will be fetched

ctx - context required for finding proper value

args - possible arguments if attribute is defined as function

Returns:

possible values