CachedSelfSignedCertificate Class — netty Architecture

Source Code

handler/src/test/java/io/netty/handler/ssl/util/CachedSelfSignedCertificate.java lines 20–49

public final class CachedSelfSignedCertificate {

    private CachedSelfSignedCertificate() {
    }

    /**
     * Obtain a lazily-created, shared {@link SelfSignedCertificate} instance.
     * @return A shared {@link SelfSignedCertificate}.
     */
    public static SelfSignedCertificate getCachedCertificate() {
        Object instance = LazyDefaultInstance.INSTANCE;
        if (instance instanceof SelfSignedCertificate) {
            return (SelfSignedCertificate) instance;
        }
        Throwable throwable = (Throwable) instance;
        throw new IllegalStateException("Could not create default self-signed certificate instance", throwable);
    }

    private static final class LazyDefaultInstance {
        public static final Object INSTANCE = createInstance();

        private static Object createInstance() {
            try {
                return new SelfSignedCertificate();
            } catch (CertificateException e) {
                return e;
            }
        }
    }
}