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Lifecycle AOP Framework. Enabling describe enhanced State Diagram with Java language, and processing relational Lifecycle constraints(including: state validations, transitions validations), concurrency, lifecycle callbacks, lifecycle events implicitely with Lifecycle Engine. This engine can be used by class load time (Java Instrumentation) or compile time (Lifecycle-StaticWeaver-maven-plugin).

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/*
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 * and Distribution License("CDDL") (collectively, the "License"). You
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 * obtain a copy of the License at
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package net.imadz.bcel.intercept;

import net.imadz.lifecycle.AbsStateMachineRegistry;
import net.imadz.lifecycle.AbsStateMachineRegistry.LifecycleRegistry;
import net.imadz.lifecycle.AbsStateMachineRegistry.StateMachineBuilder;
import net.imadz.verification.VerificationException;

@LifecycleRegistry({})
@StateMachineBuilder
public class DefaultStateMachineRegistry extends AbsStateMachineRegistry {

    private static volatile DefaultStateMachineRegistry INSTANCE;

    public static AbsStateMachineRegistry getInstance() {
        if ( null == INSTANCE ) {
            synchronized (AbsStateMachineRegistry.class) {
                if ( null == INSTANCE ) {
                    try {
                        INSTANCE = new DefaultStateMachineRegistry();
                    } catch (VerificationException e) {
                        throw new IllegalStateException(e);
                    }
                }
            }
        }
        return INSTANCE;
    }

    protected DefaultStateMachineRegistry() throws VerificationException {}
}