Add RegionConfigurer to register a SD CrudRepository as a Region CacheWriter to write-through to an external data source for Inline Caching.

spring-geode/src/test/java/org/springframework/geode/cache/RepositoryCacheWriterRegionConfigurerUnitTests.java

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+/*
+ * Copyright 2019 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
+ *
+ *     https://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.geode.cache;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.ArgumentMatchers.isA;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import java.util.function.Predicate;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
+
+import org.apache.geode.cache.CacheWriter;
+
+import org.springframework.data.gemfire.PeerRegionFactoryBean;
+import org.springframework.data.gemfire.client.ClientRegionFactoryBean;
+import org.springframework.data.repository.CrudRepository;
+
+/**
+ * Unit Tests for {@link RepositoryCacheWriterRegionConfigurer}.
+ *
+ * @author John Blum
+ * @see org.junit.Test
+ * @see org.mockito.Mock
+ * @see org.mockito.Mockito
+ * @see org.mockito.junit.MockitoJUnitRunner
+ * @see org.apache.geode.cache.CacheWriter
+ * @see org.springframework.data.gemfire.PeerRegionFactoryBean
+ * @see org.springframework.data.gemfire.client.ClientRegionFactoryBean
+ * @see org.springframework.data.repository.CrudRepository
+ * @see org.springframework.geode.cache.RepositoryCacheWriter
+ * @see org.springframework.geode.cache.RepositoryCacheWriterRegionConfigurer
+ * @since 1.1.0
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class RepositoryCacheWriterRegionConfigurerUnitTests {
+
+	@Mock
+	private CrudRepository<?, ?> mockRepository;
+
+	@Mock
+	private Predicate<String> mockPredicate;
+
+	@Test
+	public void constructRepositoryCacheWriterRegionConfigurerIsSuccessful() {
+
+		RepositoryCacheWriterRegionConfigurer<?, ?> regionConfigurer =
+			new RepositoryCacheWriterRegionConfigurer<>(this.mockRepository, this.mockPredicate);
+
+		assertThat(regionConfigurer).isNotNull();
+		assertThat(regionConfigurer.getRegionBeanName()).isEqualTo(this.mockPredicate);
+		assertThat(regionConfigurer.getRepository()).isEqualTo(this.mockRepository);
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void constructRepositoryCacheWriterRegionConfigurerWithNullRepositoryThrowsException() {
+
+		try {
+			new RepositoryCacheWriterRegionConfigurer<>(null, this.mockPredicate);
+		}
+		catch (IllegalArgumentException expected) {
+
+			assertThat(expected).hasMessage("CrudRepository is required");
+			assertThat(expected).hasNoCause();
+
+			throw expected;
+		}
+	}
+
+	@Test
+	@SuppressWarnings("unchecked")
+	public void configuresClientRegionFactoryBeanWithRepositoryCacheWriterWhenPredicateReturnsTrue() {
+
+		ClientRegionFactoryBean<?, ?> clientRegionFactoryBean = spy(new ClientRegionFactoryBean());
+
+		doAnswer(answer -> {
+
+			CacheWriter cacheWriter = answer.getArgument(0);
+
+			assertThat(cacheWriter).isInstanceOf(RepositoryCacheWriter.class);
+			assertThat(((RepositoryCacheWriter) cacheWriter).getRepository()).isEqualTo(this.mockRepository);
+
+			return null;
+
+		}).when(clientRegionFactoryBean).setCacheWriter(isA(CacheWriter.class));
+
+		when(this.mockPredicate.test(anyString())).thenReturn(true);
+
+		RepositoryCacheWriterRegionConfigurer regionConfigurer =
+			new RepositoryCacheWriterRegionConfigurer(this.mockRepository, this.mockPredicate);
+
+		regionConfigurer.configure("Example", clientRegionFactoryBean);
+
+		verify(clientRegionFactoryBean, times(1))
+			.setCacheWriter(isA(RepositoryCacheWriter.class));
+
+		verify(this.mockPredicate, times(1)).test(eq("Example"));
+	}
+
+	@Test
+	@SuppressWarnings("unchecked")
+	public void doesNotConfigureClientRegionFactoryBeanWithRepositoryCacheWriterWhenPredicateReturnsFalse() {
+
+		when(this.mockPredicate.test(anyString())).thenReturn(false);
+
+		ClientRegionFactoryBean<?, ?> clientRegionFactoryBean = spy(new ClientRegionFactoryBean());
+
+		RepositoryCacheWriterRegionConfigurer regionConfigurer =
+			new RepositoryCacheWriterRegionConfigurer(this.mockRepository, this.mockPredicate);
+
+		regionConfigurer.configure("Example", clientRegionFactoryBean);
+
+		verify(clientRegionFactoryBean, never()).setCacheWriter(any(CacheWriter.class));
+		verify(this.mockPredicate, times(1)).test(eq("Example"));
+	}
+
+	@Test
+	@SuppressWarnings("unchecked")
+	public void configuresPeerRegionFactoryBeanWithRepositoryCacheWriterWhenPredicateReturnsTrue() {
+
+		PeerRegionFactoryBean<?, ?> peerRegionFactoryBean = mock(PeerRegionFactoryBean.class);
+
+		doAnswer(answer -> {
+
+			CacheWriter cacheWriter = answer.getArgument(0);
+
+			assertThat(cacheWriter).isInstanceOf(RepositoryCacheWriter.class);
+			assertThat(((RepositoryCacheWriter) cacheWriter).getRepository()).isEqualTo(this.mockRepository);
+
+			return null;
+
+		}).when(peerRegionFactoryBean).setCacheWriter(isA(CacheWriter.class));
+
+		when(this.mockPredicate.test(anyString())).thenReturn(true);
+
+		RepositoryCacheWriterRegionConfigurer regionConfigurer =
+			new RepositoryCacheWriterRegionConfigurer(this.mockRepository, this.mockPredicate);
+
+		regionConfigurer.configure("Example", peerRegionFactoryBean);
+
+		verify(peerRegionFactoryBean, times(1))
+			.setCacheWriter(isA(RepositoryCacheWriter.class));
+
+		verify(this.mockPredicate, times(1)).test(eq("Example"));
+	}
+
+	@Test
+	@SuppressWarnings("unchecked")
+	public void doesNotConfigurePeerRegionFactoryBeanWithRepositoryCacheWriterWhenPredicateReturnsFalse() {
+
+		when(this.mockPredicate.test(anyString())).thenReturn(false);
+
+		PeerRegionFactoryBean<?, ?> peerRegionFactoryBean = mock(PeerRegionFactoryBean.class);
+
+		RepositoryCacheWriterRegionConfigurer regionConfigurer =
+			new RepositoryCacheWriterRegionConfigurer(this.mockRepository, this.mockPredicate);
+
+		regionConfigurer.configure("Example", peerRegionFactoryBean);
+
+		verify(peerRegionFactoryBean, never()).setCacheWriter(any(CacheWriter.class));
+		verify(this.mockPredicate, times(1)).test(eq("Example"));
+	}
+}