RedisRetryTemplateTests.java

/*
 * Copyright 2015 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.xd.analytics.metrics.redis;

import static org.mockito.Matchers.any;
import static org.mockito.Mockito.doNothing;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;

import org.springframework.data.redis.connection.RedisConnection;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.retry.RecoveryCallback;
import org.springframework.retry.RetryCallback;
import org.springframework.retry.RetryContext;
import org.springframework.retry.RetryListener;
import org.springframework.retry.support.RetryTemplate;

import redis.clients.jedis.exceptions.JedisException;

/**
 * @author Christoph Strobl
 * @author Thomas Darimont
 */
@RunWith(MockitoJUnitRunner.class)
public class RedisRetryTemplateTests {

	private RedisRetryTemplate<String, String> template;

	private
	@Mock
	RedisConnectionFactory connectionFactoryMock;

	private
	@Mock
	RedisConnection redisConnectionMock;

	private
	@Mock
	RetryListener retryListenerMock;

	private
	@Mock
	RecoveryCallback<?> recoveryCallback;

	@Before
	@SuppressWarnings("unchecked")
	public void setUp() throws Exception {
		template = new RedisRetryTemplate<String, String>();
		template.setConnectionFactory(connectionFactoryMock);
		when(connectionFactoryMock.getConnection()).thenReturn(redisConnectionMock);
		doReturn(true).when(retryListenerMock).open(any(RetryContext.class), any(RetryCallback.class));
		doNothing().when(retryListenerMock)
				.onError(any(RetryContext.class), any(RetryCallback.class), any(Throwable.class));
		doNothing().when(retryListenerMock).close(any(RetryContext.class), any(RetryCallback.class), any(Throwable.class));
		when(recoveryCallback.recover(any(RetryContext.class))).thenReturn(null);
		template.afterPropertiesSet();
	}

	@Test
	@SuppressWarnings("unchecked")
	public void shouldRetryAndRecoverAfter2FailedAttempts() {
		RetryTemplate retry = new RetryTemplate();
		retry.setListeners(new RetryListener[] {retryListenerMock});
		template.setRetryOperations(retry);
		// 1st call
		doThrow(new JedisException("dummy"))
				// 2nd call
				.doThrow(new JedisException("dummy"))
						// 3rd call
				.doNothing().when(redisConnectionMock).set((byte[]) any(), (byte[]) any());
		template.opsForValue().set("a", "b");
		verify(retryListenerMock, times(2))
				.onError(any(RetryContext.class), any(RetryCallback.class), any(Throwable.class));
	}

	@Test
	@SuppressWarnings("unchecked")
	public void shouldRetryAndRecoverAfter3FailedAttemptsByCallingRecoveryCallback() throws Exception {
		RetryTemplate retry = new RetryTemplate();
		retry.setListeners(new RetryListener[] {retryListenerMock});
		template.setRetryOperations(retry);
		template.setRecoveryCallback(recoveryCallback);
		// 1st call
		doThrow(new JedisException("dummy"))
				// 2nd call
				.doThrow(new JedisException("dummy"))
						// 3rd call
				.doThrow(new JedisException("dummy")).when(redisConnectionMock).set((byte[]) any(), (byte[]) any());
		template.opsForValue().set("a", "b");
		verify(retryListenerMock, times(3))
				.onError(any(RetryContext.class), any(RetryCallback.class), any(Throwable.class));
		verify(recoveryCallback, times(1)).recover(any(RetryContext.class));
	}
}