Package net.bytebuddy.agent.builder

Class AgentBuilder.CircularityLock.Default

java.lang.Object

net.bytebuddy.agent.builder.AgentBuilder.CircularityLock.WithInnerClassLoadingLock

net.bytebuddy.agent.builder.AgentBuilder.CircularityLock.Default

All Implemented Interfaces:

AgentBuilder.CircularityLock

Enclosing interface:

AgentBuilder.CircularityLock

public static class AgentBuilder.CircularityLock.Default
extends AgentBuilder.CircularityLock.WithInnerClassLoadingLock

A default implementation of a circularity lock. Since class loading already synchronizes on a class loader, it suffices to apply a thread-local lock.

Nested Class Summary

Nested classes/interfaces inherited from class net.bytebuddy.agent.builder.AgentBuilder.CircularityLock.WithInnerClassLoadingLock

AgentBuilder.CircularityLock.WithInnerClassLoadingLock.TrivialLock

Nested classes/interfaces inherited from interface net.bytebuddy.agent.builder.AgentBuilder.CircularityLock

AgentBuilder.CircularityLock.Default, AgentBuilder.CircularityLock.Global, AgentBuilder.CircularityLock.Inactive, AgentBuilder.CircularityLock.WithInnerClassLoadingLock

Field Summary

Fields

Modifier and Type	Field	Description
private java.util.concurrent.ConcurrentMap<java.lang.Thread,java.lang.Boolean>	threads	A map of threads to an unused boolean to emulate a thread-local state without using thread locals.

Fields inherited from class net.bytebuddy.agent.builder.AgentBuilder.CircularityLock.WithInnerClassLoadingLock

DEFAULT_SIZE

Constructor Summary

Constructors

Constructor	Description
Default()	Creates a default lock with a default size for the amount of global locks.
Default(int size)	Creates a default lock with the supplied number of global locks.

Method Summary

Modifier and Type	Method	Description
protected boolean	doAcquire()	Acquires the actual lock for the current thread.
protected boolean	isLocked()	Returns true if the current thread is currently locked.
void	release()	Releases the circularity lock if it is currently acquired.

Methods inherited from class net.bytebuddy.agent.builder.AgentBuilder.CircularityLock.WithInnerClassLoadingLock

acquire

Methods inherited from class java.lang.Object

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

Field Detail

threads

private final java.util.concurrent.ConcurrentMap<java.lang.Thread,java.lang.Boolean> threads

A map of threads to an unused boolean to emulate a thread-local state without using thread locals. This avoids using thread-local maps and does not interfere with Java fibers in case that an instrumentation is executed from a virtual thread where thread locals are not permitted.

Constructor Detail

Default

public Default()

Creates a default lock with a default size for the amount of global locks.

Default

public Default(int size)

Creates a default lock with the supplied number of global locks.

Parameters:

size - The amount of locks used in parallel or 0 if no global locks should be used.

Method Detail

doAcquire

protected boolean doAcquire()

Description copied from class: AgentBuilder.CircularityLock.WithInnerClassLoadingLock

Acquires the actual lock for the current thread.

Specified by:

doAcquire in class AgentBuilder.CircularityLock.WithInnerClassLoadingLock

Returns:

true if the lock was acquired successfully, false if it is already hold.

release

public void release()

Releases the circularity lock if it is currently acquired.

isLocked

protected boolean isLocked()

Returns true if the current thread is currently locked.

Returns:

true if the current thread is currently locked.