Examples with HystrixCommandTransformer com.navercorp.pinpoint.plugin.hystrix.transformer.HystrixCommandTransformer used on opensource projects

Example 1 with HystrixCommandTransformer

use of com.navercorp.pinpoint.plugin.hystrix.transformer.HystrixCommandTransformer in project pinpoint by naver.

the class HystrixPlugin method addTransformers.

private void addTransformers(int numHystrixCommandAnonymousLocalClass) {
    transformTemplate.transform("com.netflix.hystrix.HystrixCommand", new HystrixCommandTransformer());
    /*
         * After com.netflix.hystrix:hystrix-core:1.4.0 the api changed.
         * The run() and getFallback() methods of the subclass will be called by HystrixCommand's
         * anonymous inner classes.
         *
         * Safest way (although ugly) is to predefine the anonymous inner class names and check each of them to inject
         * their appropriate interceptors as they are loaded.
         *
         * The anonymous inner classes that should be modified may differ according to hystrix-core version. This is
         * simply something that we'll have to keep updating if any changes occur.
         * (Any breaking changes can be detected through integration tests.)
         */
    // number of anonymous inner classes to look for.
    // We start with 3 only because the most recent version requires this many. May be better to make this
    // configurable but for now let's just hard-code it.
    final int numAnonymousInnerClassesToTest = numHystrixCommandAnonymousLocalClass;
    for (int i = 0; i < numAnonymousInnerClassesToTest; ++i) {
        String anonymousInnerClassName = "com.netflix.hystrix.HystrixCommand$" + (i + 1);
        logger.debug("Registering transformer for {}", anonymousInnerClassName);
        transformTemplate.transform(anonymousInnerClassName, new TransformCallback() {

            @Override
            public byte[] doInTransform(Instrumentor instrumentor, ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws InstrumentException {
                InstrumentClass target = instrumentor.getInstrumentClass(loader, className, classfileBuffer);
                if (target.hasEnclosingMethod("getExecutionObservable")) {
                    // 1.4.0 ~ 1.5.2 - void call(Subscriber<? super R> s)
                    InstrumentMethod method = target.getDeclaredMethod("call", "rx.Subscriber");
                    // 1.5.3+ - Observable<R> call()
                    if (method == null) {
                        method = target.getDeclaredMethod("call");
                        // 1.5.4+ - May be another anonymous class inside getExecutionObservable()
                        if (!method.getReturnType().equals("rx.Observable")) {
                            return null;
                        }
                    }
                    if (method != null) {
                        // Add getter for the enclosing instance
                        target.addGetter("com.navercorp.pinpoint.plugin.hystrix.field.EnclosingInstanceFieldGetter", "this$0");
                        method.addInterceptor("com.navercorp.pinpoint.plugin.hystrix.interceptor.ExecutionObservableCallInterceptor");
                        return target.toBytecode();
                    } else {
                        logger.warn("Unknown version of HystrixCommand.getExecutionObservable() detected");
                        return null;
                    }
                } else if (target.hasEnclosingMethod("getFallbackObservable")) {
                    // 1.4.0 ~ 1.5.2 - void call(Subscriber<? super R> s)
                    InstrumentMethod method = target.getDeclaredMethod("call", "rx.Subscriber");
                    // 1.5.3+ - Observable<R> call()
                    if (method == null) {
                        method = target.getDeclaredMethod("call");
                    }
                    if (method != null) {
                        // Add getter for the enclosing instance
                        target.addGetter("com.navercorp.pinpoint.plugin.hystrix.field.EnclosingInstanceFieldGetter", "this$0");
                        method.addInterceptor("com.navercorp.pinpoint.plugin.hystrix.interceptor.FallbackObservableCallInterceptor");
                        return target.toBytecode();
                    } else {
                        logger.warn("Unknown version of HystrixCommand.getFallbackObservable detected");
                        return null;
                    }
                } else {
                    return null;
                }
            }
        });
    }
}