/*
* Copyright 2006-2007 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.retry.interceptor;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.junit.Before;
import org.junit.Test;
import org.springframework.aop.framework.Advised;
import org.springframework.aop.framework.ProxyFactory;
import org.springframework.aop.target.SingletonTargetSource;
import org.springframework.retry.ExhaustedRetryException;
import org.springframework.retry.policy.AlwaysRetryPolicy;
import org.springframework.retry.policy.NeverRetryPolicy;
import org.springframework.retry.policy.SimpleRetryPolicy;
import org.springframework.retry.support.RetryTemplate;
/**
* @author Dave Syer
*
*/
public class StatefulRetryOperationsInterceptorTests {
private StatefulRetryOperationsInterceptor interceptor;
private RetryTemplate retryTemplate = new RetryTemplate();
private Service service;
private Transformer transformer;
private static int count;
@Before
public void setUp() throws Exception {
interceptor = new StatefulRetryOperationsInterceptor();
service = (Service) ProxyFactory.getProxy(Service.class, new SingletonTargetSource(new ServiceImpl()));
transformer = (Transformer) ProxyFactory.getProxy(Transformer.class, new SingletonTargetSource(
new TransformerImpl()));
count = 0;
}
@Test
public void testDefaultInterceptorSunnyDay() throws Exception {
((Advised) service).addAdvice(interceptor);
try {
service.service("foo");
fail("Expected Exception.");
}
catch (Exception e) {
String message = e.getMessage();
assertTrue("Wrong message: " + message, message.startsWith("Not enough calls"));
}
assertEquals(1, count);
}
@Test
public void testDefaultTransformerInterceptorSunnyDay() throws Exception {
((Advised) transformer).addAdvice(interceptor);
try {
transformer.transform("foo");
fail("Expected Exception.");
}
catch (Exception e) {
String message = e.getMessage();
assertTrue("Wrong message: " + message, message.startsWith("Not enough calls"));
}
assertEquals(1, count);
}
@Test
public void testDefaultInterceptorAlwaysRetry() throws Exception {
retryTemplate.setRetryPolicy(new AlwaysRetryPolicy());
interceptor.setRetryOperations(retryTemplate);
((Advised) service).addAdvice(interceptor);
try {
service.service("foo");
fail("Expected Exception.");
}
catch (Exception e) {
String message = e.getMessage();
assertTrue("Wrong message: " + message, message.startsWith("Not enough calls"));
}
assertEquals(1, count);
}
@Test
public void testInterceptorChainWithRetry() throws Exception {
((Advised) service).addAdvice(interceptor);
final List<String> list = new ArrayList<String>();
((Advised) service).addAdvice(new MethodInterceptor() {
public Object invoke(MethodInvocation invocation) throws Throwable {
list.add("chain");
return invocation.proceed();
}
});
interceptor.setRetryOperations(retryTemplate);
retryTemplate.setRetryPolicy(new SimpleRetryPolicy(2, Collections
.<Class<? extends Throwable>, Boolean> singletonMap(Exception.class, true)));
try {
service.service("foo");
fail("Expected Exception.");
}
catch (Exception e) {
String message = e.getMessage();
assertTrue("Wrong message: " + message, message.startsWith("Not enough calls"));
}
assertEquals(1, count);
service.service("foo");
assertEquals(2, count);
assertEquals(2, list.size());
}
@Test
public void testTransformerWithSuccessfulRetry() throws Exception {
((Advised) transformer).addAdvice(interceptor);
interceptor.setRetryOperations(retryTemplate);
retryTemplate.setRetryPolicy(new SimpleRetryPolicy(2, Collections
.<Class<? extends Throwable>, Boolean> singletonMap(Exception.class, true)));
try {
transformer.transform("foo");
fail("Expected Exception.");
}
catch (Exception e) {
String message = e.getMessage();
assertTrue("Wrong message: " + message, message.startsWith("Not enough calls"));
}
assertEquals(1, count);
Collection<String> result = transformer.transform("foo");
assertEquals(2, count);
assertEquals(1, result.size());
}
@Test
public void testRetryExceptionAfterTooManyAttemptsWithNoRecovery() throws Exception {
((Advised) service).addAdvice(interceptor);
interceptor.setRetryOperations(retryTemplate);
retryTemplate.setRetryPolicy(new NeverRetryPolicy());
try {
service.service("foo");
fail("Expected Exception.");
}
catch (Exception e) {
String message = e.getMessage();
assertTrue("Wrong message: " + message, message.startsWith("Not enough calls"));
}
assertEquals(1, count);
try {
service.service("foo");
fail("Expected ExhaustedRetryException");
}
catch (ExhaustedRetryException e) {
// expected
String message = e.getMessage();
assertTrue("Wrong message: " + message, message.startsWith("Retry exhausted"));
}
assertEquals(1, count);
}
@Test
public void testRecoveryAfterTooManyAttempts() throws Exception {
((Advised) service).addAdvice(interceptor);
interceptor.setRetryOperations(retryTemplate);
retryTemplate.setRetryPolicy(new NeverRetryPolicy());
try {
service.service("foo");
fail("Expected Exception.");
}
catch (Exception e) {
String message = e.getMessage();
assertTrue("Wrong message: " + message, message.startsWith("Not enough calls"));
}
assertEquals(1, count);
interceptor.setRecoverer(new MethodInvocationRecoverer<Object>() {
public Object recover(Object[] data, Throwable cause) {
count++;
return null;
}
});
service.service("foo");
assertEquals(2, count);
}
@Test
public void testTransformerRecoveryAfterTooManyAttempts() throws Exception {
((Advised) transformer).addAdvice(interceptor);
interceptor.setRetryOperations(retryTemplate);
retryTemplate.setRetryPolicy(new NeverRetryPolicy());
try {
transformer.transform("foo");
fail("Expected Exception.");
}
catch (Exception e) {
String message = e.getMessage();
assertTrue("Wrong message: " + message, message.startsWith("Not enough calls"));
}
assertEquals(1, count);
interceptor.setRecoverer(new MethodInvocationRecoverer<Collection<String>>() {
public Collection<String> recover(Object[] data, Throwable cause) {
count++;
return Collections.singleton((String) data[0]);
}
});
Collection<String> result = transformer.transform("foo");
assertEquals(2, count);
assertEquals(1, result.size());
}
public static interface Service {
void service(String in) throws Exception;
}
public static class ServiceImpl implements Service {
public void service(String in) throws Exception {
count++;
if (count < 2) {
throw new Exception("Not enough calls: " + count);
}
}
}
public static interface Transformer {
Collection<String> transform(String in) throws Exception;
}
public static class TransformerImpl implements Transformer {
public Collection<String> transform(String in) throws Exception {
count++;
if (count < 2) {
throw new Exception("Not enough calls: " + count);
}
return Collections.singleton(in + ":" + count);
}
}
}