use of cn.taketoday.retry.RetryPolicy in project today-infrastructure by TAKETODAY.
the class AnnotationAwareRetryOperationsInterceptor method getStatefulInterceptor.
private MethodInterceptor getStatefulInterceptor(Object target, Method method, Retryable retryable) {
RetryTemplate template = createTemplate(retryable.listeners());
template.setRetryContextCache(this.retryContextCache);
CircuitBreaker circuit = AnnotatedElementUtils.findMergedAnnotation(method, CircuitBreaker.class);
if (circuit == null) {
circuit = findAnnotationOnTarget(target, method, CircuitBreaker.class);
}
if (circuit != null) {
RetryPolicy policy = getRetryPolicy(circuit);
CircuitBreakerRetryPolicy breaker = new CircuitBreakerRetryPolicy(policy);
breaker.setOpenTimeout(getOpenTimeout(circuit));
breaker.setResetTimeout(getResetTimeout(circuit));
template.setRetryPolicy(breaker);
template.setBackOffPolicy(new NoBackOffPolicy());
String label = circuit.label();
if (!StringUtils.hasText(label)) {
label = method.toGenericString();
}
return RetryInterceptorBuilder.circuitBreaker().keyGenerator(new FixedKeyGenerator("circuit")).retryOperations(template).recoverer(getRecoverer(target, method)).label(label).build();
}
RetryPolicy policy = getRetryPolicy(retryable);
template.setRetryPolicy(policy);
template.setBackOffPolicy(getBackoffPolicy(retryable.backoff()));
String label = retryable.label();
return RetryInterceptorBuilder.stateful().keyGenerator(this.methodArgumentsKeyGenerator).newMethodArgumentsIdentifier(this.newMethodArgumentsIdentifier).retryOperations(template).label(label).recoverer(getRecoverer(target, method)).build();
}
use of cn.taketoday.retry.RetryPolicy in project today-infrastructure by TAKETODAY.
the class ExceptionClassifierRetryPolicy method registerThrowable.
/**
* Delegate to the policy currently activated in the context.
*
* @see RetryPolicy#registerThrowable(RetryContext,
* Throwable)
*/
public void registerThrowable(RetryContext context, Throwable throwable) {
RetryPolicy policy = (RetryPolicy) context;
policy.registerThrowable(context, throwable);
((RetryContextSupport) context).registerThrowable(throwable);
}
use of cn.taketoday.retry.RetryPolicy in project today-infrastructure by TAKETODAY.
the class RetryTemplate method doExecute.
/**
* Execute the callback once if the policy dictates that we can, otherwise execute the
* recovery callback.
*
* @param recoveryCallback the {@link RecoveryCallback}
* @param retryCallback the {@link RetryCallback}
* @param state the {@link RetryState}
* @param <T> the type of the return value
* @param <E> the exception type to throw
* @return T the retried value
* @throws ExhaustedRetryException if the retry has been exhausted.
* @throws E an exception if the retry operation fails
* @see RetryOperations#execute(RetryCallback, RecoveryCallback, RetryState)
*/
protected <T, E extends Throwable> T doExecute(RetryCallback<T, E> retryCallback, RecoveryCallback<T> recoveryCallback, RetryState state) throws E, ExhaustedRetryException {
RetryPolicy retryPolicy = this.retryPolicy;
BackOffPolicy backOffPolicy = this.backOffPolicy;
// Allow the retry policy to initialise itself...
RetryContext context = open(retryPolicy, state);
if (logger.isTraceEnabled()) {
logger.trace("RetryContext retrieved: {}", context);
}
// Make sure the context is available globally for clients who need
// it...
RetrySynchronizationManager.register(context);
Throwable lastException = null;
boolean exhausted = false;
try {
// Give clients a chance to enhance the context...
boolean running = doOpenInterceptors(retryCallback, context);
if (!running) {
throw new TerminatedRetryException("Retry terminated abnormally by interceptor before first attempt");
}
// Get or Start the backoff context...
BackOffContext backOffContext = null;
Object resource = context.getAttribute("backOffContext");
if (resource instanceof BackOffContext) {
backOffContext = (BackOffContext) resource;
}
if (backOffContext == null) {
backOffContext = backOffPolicy.start(context);
if (backOffContext != null) {
context.setAttribute("backOffContext", backOffContext);
}
}
/*
* We allow the whole loop to be skipped if the policy or context already
* forbid the first try. This is used in the case of external retry to allow a
* recovery in handleRetryExhausted without the callback processing (which
* would throw an exception).
*/
while (canRetry(retryPolicy, context) && !context.isExhaustedOnly()) {
try {
if (logger.isDebugEnabled()) {
logger.debug("Retry: count={}", context.getRetryCount());
}
// Reset the last exception, so if we are successful
// the close interceptors will not think we failed...
lastException = null;
return retryCallback.doWithRetry(context);
} catch (Throwable e) {
lastException = e;
try {
registerThrowable(retryPolicy, state, context, e);
} catch (Exception ex) {
throw new TerminatedRetryException("Could not register throwable", ex);
} finally {
doOnErrorInterceptors(retryCallback, context, e);
}
if (canRetry(retryPolicy, context) && !context.isExhaustedOnly()) {
try {
backOffPolicy.backOff(backOffContext);
} catch (BackOffInterruptedException ex) {
lastException = e;
// back off was prevented by another thread - fail the retry
if (logger.isDebugEnabled()) {
logger.debug("Abort retry because interrupted: count={}", context.getRetryCount());
}
throw ex;
}
}
if (logger.isDebugEnabled()) {
logger.debug("Checking for rethrow: count={}", context.getRetryCount());
}
if (shouldRethrow(retryPolicy, context, state)) {
if (logger.isDebugEnabled()) {
logger.debug("Rethrow in retry for policy: count={}", context.getRetryCount());
}
throw RetryTemplate.<E>wrapIfNecessary(e);
}
}
/*
* A stateful attempt that can retry may rethrow the exception before now,
* but if we get this far in a stateful retry there's a reason for it,
* like a circuit breaker or a rollback classifier.
*/
if (state != null && context.hasAttribute(GLOBAL_STATE)) {
break;
}
}
if (state == null && logger.isDebugEnabled()) {
logger.debug("Retry failed last attempt: count={}", context.getRetryCount());
}
exhausted = true;
return handleRetryExhausted(recoveryCallback, context, state);
} catch (Throwable e) {
throw RetryTemplate.<E>wrapIfNecessary(e);
} finally {
close(retryPolicy, context, state, lastException == null || exhausted);
doCloseInterceptors(retryCallback, context, lastException);
RetrySynchronizationManager.clear();
}
}
use of cn.taketoday.retry.RetryPolicy in project today-infrastructure by TAKETODAY.
the class ExceptionClassifierRetryPolicyTests method testNullPolicies.
@Test
public void testNullPolicies() throws Exception {
policy.setPolicyMap(new HashMap<Class<? extends Throwable>, RetryPolicy>());
RetryContext context = policy.open(null);
assertNotNull(context);
}
use of cn.taketoday.retry.RetryPolicy in project today-infrastructure by TAKETODAY.
the class RetryTemplateBuilderTests method testCustomPolicy.
@Test
public void testCustomPolicy() {
RetryPolicy customPolicy = mock(RetryPolicy.class);
RetryTemplate template = RetryTemplate.builder().customPolicy(customPolicy).build();
PolicyTuple policyTuple = PolicyTuple.extractWithAsserts(template);
assertDefaultClassifier(policyTuple);
Assert.assertEquals(customPolicy, policyTuple.baseRetryPolicy);
}
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