diff --git a/geode-spring-boot-starter/src/main/java/org/springframework/boot/data/geode/cache/support/CacheLoaderSupport.java b/geode-spring-boot-starter/src/main/java/org/springframework/boot/data/geode/cache/support/CacheLoaderSupport.java new file mode 100644 index 00000000..88f54336 --- /dev/null +++ b/geode-spring-boot-starter/src/main/java/org/springframework/boot/data/geode/cache/support/CacheLoaderSupport.java @@ -0,0 +1,40 @@ +/* + * Copyright 2018 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.boot.data.geode.cache.support; + +import org.apache.geode.cache.CacheLoader; + +/** + * The {@link CacheLoaderSupport} interface is an extension of {@link CacheLoader} and a {@link FunctionalInterface} + * useful in Lambda expressions. + * + * @author John Blum + * @see org.apache.geode.cache.CacheLoader + * @since 1.0.0 + */ +@FunctionalInterface +public interface CacheLoaderSupport extends CacheLoader { + + /** + * Closes any resources opened and used by this {@link CacheLoader}. + * + * @see org.apache.geode.cache.CacheLoader#close() + */ + @Override + default void close() {} + +} diff --git a/geode-spring-boot-starter/src/test/java/example/geode/cache/EchoCacheLoader.java b/geode-spring-boot-starter/src/test/java/example/geode/cache/EchoCacheLoader.java new file mode 100644 index 00000000..0d821f8d --- /dev/null +++ b/geode-spring-boot-starter/src/test/java/example/geode/cache/EchoCacheLoader.java @@ -0,0 +1,40 @@ +/* + * Copyright 2018 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 example.geode.cache; + +import org.apache.geode.cache.CacheLoader; +import org.apache.geode.cache.CacheLoaderException; +import org.apache.geode.cache.LoaderHelper; +import org.springframework.boot.data.geode.cache.support.CacheLoaderSupport; + +/** + * The {@link EchoCacheLoader} class is an implementation of {@link CacheLoader} that echos the key as the value. + * + * @author John Blum + * @see org.springframework.boot.data.geode.cache.support.CacheLoaderSupport + * @since 1.0.0 + */ +@SuppressWarnings("unused") +public class EchoCacheLoader implements CacheLoaderSupport { + + public static final EchoCacheLoader INSTANCE = new EchoCacheLoader(); + + @Override + public String load(LoaderHelper helper) throws CacheLoaderException { + return helper.getKey(); + } +}