Package io.opentelemetry.javaagent.tooling.muzzle

Class ReferenceCollector

java.lang.Object

io.opentelemetry.javaagent.tooling.muzzle.ReferenceCollector

public final class ReferenceCollector
extends Object

LinkedHashMap is used for reference map to guarantee a deterministic order of iteration, so that bytecode generated based on it would also be deterministic.

This class is only called at compile time by the MuzzleCodeGenerationPlugin ByteBuddy plugin.

Constructor Summary

Constructors

Constructor	Description
ReferenceCollector(Predicate<String> libraryInstrumentationPredicate, ClassLoader resourceLoader)

Method Summary

Modifier and Type	Method	Description
void	collectReferencesFromAdvice(String adviceClassName)	Traverse a graph of classes starting from adviceClassName and collect all references to both internal (instrumentation) and external classes.
void	collectReferencesFromResource(HelperResource helperResource)	If passed resource path points to an SPI file (either Java ServiceLoader or AWS SDK ExecutionInterceptor) reads the file and adds every implementation as a reference, traversing the graph of classes until a non-instrumentation (external) class is encountered.
Map<String,ClassRef>	getReferences()
List<String>	getSortedHelperClasses()
VirtualFieldMappings	getVirtualFieldMappings()
void	prune()

Methods inherited from class java.lang.Object

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

Constructor Details

ReferenceCollector

public ReferenceCollector(Predicate<String> libraryInstrumentationPredicate,
 ClassLoader resourceLoader)

Method Details

collectReferencesFromResource

public void collectReferencesFromResource(HelperResource helperResource)

If passed resource path points to an SPI file (either Java ServiceLoader or AWS SDK ExecutionInterceptor) reads the file and adds every implementation as a reference, traversing the graph of classes until a non-instrumentation (external) class is encountered.

See Also:

• HelperClassPredicate

collectReferencesFromAdvice

public void collectReferencesFromAdvice(String adviceClassName)

Traverse a graph of classes starting from adviceClassName and collect all references to both internal (instrumentation) and external classes.

The graph of classes is traversed until a non-instrumentation (external) class is encountered.

Parameters:

adviceClassName - Starting point for generating references.

See Also:

• HelperClassPredicate

getReferences

public Map<String,ClassRef> getReferences()

prune

public void prune()

getSortedHelperClasses

public List<String> getSortedHelperClasses()

getVirtualFieldMappings

public VirtualFieldMappings getVirtualFieldMappings()