DATAGEODE-318 - Add CacheFactory implementation of the CacheResolver interface capable of resolving a peer Cache instance.

spring-data-geode/src/main/java/org/springframework/data/gemfire/support/CacheFactoryCacheResolver.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2020 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.data.gemfire.support;
+
+import org.apache.geode.cache.Cache;
+import org.apache.geode.cache.CacheFactory;
+
+import org.springframework.data.gemfire.CacheResolver;
+
+/**
+ * Cacheable {@link CacheResolver} implementation resolving a {@link Cache}
+ * using the {@link CacheFactory} API.
+ *
+ * @author John Blum
+ * @see org.apache.geode.cache.Cache
+ * @see org.apache.geode.cache.CacheFactory
+ * @see org.springframework.data.gemfire.CacheResolver
+ * @see org.springframework.data.gemfire.support.AbstractCachingCacheResolver
+ * @since 2.3.0
+ */
+public class CacheFactoryCacheResolver extends AbstractCachingCacheResolver<Cache> {
+
+	public static final CacheFactoryCacheResolver INSTANCE = new CacheFactoryCacheResolver();
+
+	@Override
+	protected Cache doResolve() {
+		return CacheFactory.getAnyInstance();
+	}
+}

spring-data-geode/src/test/java/org/springframework/data/gemfire/support/CacheFactoryCacheResolverIntegrationTests.java

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+/*
+ * Copyright 2020 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.data.gemfire.support;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.apache.geode.cache.GemFireCache;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.gemfire.GemfireUtils;
+import org.springframework.data.gemfire.config.annotation.PeerCacheApplication;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+
+/**
+ * Integration Tests for {@link CacheFactoryCacheResolver}.
+ *
+ * @author John Blum
+ * @see org.junit.Test
+ * @see org.mockito.Mockito
+ * @see org.apache.geode.cache.Cache
+ * @see org.apache.geode.cache.GemFireCache
+ * @see org.springframework.data.gemfire.config.annotation.PeerCacheApplication
+ * @see org.springframework.data.gemfire.support.CacheFactoryCacheResolver
+ * @see org.springframework.test.context.ContextConfiguration
+ * @see org.springframework.test.context.junit4.SpringRunner
+ * @since 2.3.0
+ */
+@RunWith(SpringRunner.class)
+@ContextConfiguration
+@SuppressWarnings("unused")
+public class CacheFactoryCacheResolverIntegrationTests {
+
+	@Autowired
+	private GemFireCache peerCache;
+
+	@Before
+	public void setup() {
+		assertThat(this.peerCache).isNotNull();
+		assertThat(GemfireUtils.isPeer(this.peerCache)).isTrue();
+	}
+
+	@Test
+	public void cacheFactoryCacheResolverResolvesPeerCache() {
+
+		CacheFactoryCacheResolver cacheResolver = spy(CacheFactoryCacheResolver.INSTANCE);
+
+		assertThat(cacheResolver.resolve()).isSameAs(this.peerCache);
+		assertThat(cacheResolver.resolve()).isSameAs(this.peerCache);
+
+		verify(cacheResolver, times(1)).doResolve();
+	}
+
+	@PeerCacheApplication
+	static class TestConfiguration { }
+
+}