com.newrelic.agent.instrumentation.context

Class ClassesMatcher

java.lang.Object

com.newrelic.agent.instrumentation.context.ClassesMatcher

public class ClassesMatcher
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_NUMBER_OF_THREADS

Constructor Summary

Constructors

Constructor and Description
ClassesMatcher()

Method Summary

Modifier and Type	Method and Description
static java.util.Set<java.lang.Class<?>>	getMatchingClasses(java.util.Collection<ClassMatchVisitorFactory> matchers, InstrumentationContextClassMatcherHelper matchHelper, java.lang.Class<?>... classes) This parallelizes matching of a large number of classes by firing up threads to handle a partition of the classes.

Methods inherited from class java.lang.Object

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

Field Detail

MAX_NUMBER_OF_THREADS

public static final int MAX_NUMBER_OF_THREADS

See Also:

Constant Field Values

Constructor Detail

ClassesMatcher

public ClassesMatcher()

Method Detail

getMatchingClasses

public static java.util.Set<java.lang.Class<?>> getMatchingClasses(java.util.Collection<ClassMatchVisitorFactory> matchers,
                                                                   InstrumentationContextClassMatcherHelper matchHelper,
                                                                   java.lang.Class<?>... classes)

This parallelizes matching of a large number of classes by firing up threads to handle a partition of the classes. It uses an interesting and difficult algorithm to decide how many threads to start, with a max of 8. We think that there is room to improve/fix/optimize this to better match available cores on the underlying hardware. If 10 classes are passed in, it will create 5 threads. If 100 classes are passed in, it will create 8 threads.