/*
 * Copyright 2002-2017 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.cache.interceptor;

import org.springframework.cache.Cache;
import org.springframework.lang.Nullable;

A strategy for handling cache-related errors. In most cases, any
exception thrown by the provider should simply be thrown back at
the client but, in some circumstances, the infrastructure may need
to handle cache-provider exceptions in a different way.
Typically, failing to retrieve an object from the cache with
a given id can be transparently managed as a cache miss by not
throwing back such exception.
Author:
Stephane Nicoll
Since:
4.1/**
 * A strategy for handling cache-related errors. In most cases, any
 * exception thrown by the provider should simply be thrown back at
 * the client but, in some circumstances, the infrastructure may need
 * to handle cache-provider exceptions in a different way.
 *
 * <p>Typically, failing to retrieve an object from the cache with
 * a given id can be transparently managed as a cache miss by not
 * throwing back such exception.
 *
 * @author Stephane Nicoll
 * @since 4.1
 */
public interface CacheErrorHandler {

	
Handle the given runtime exception thrown by the cache provider when retrieving an item with the specified key, possibly rethrowing it as a fatal exception. 
Params:
exception – the exception thrown by the cache provider
cache – the cache
key – the key used to get the item
See Also:
Cache.get(Object)/**
	 * Handle the given runtime exception thrown by the cache provider when
	 * retrieving an item with the specified {@code key}, possibly
	 * rethrowing it as a fatal exception.
	 * @param exception the exception thrown by the cache provider
	 * @param cache the cache
	 * @param key the key used to get the item
	 * @see Cache#get(Object)
	 */
	void handleCacheGetError(RuntimeException exception, Cache cache, Object key);

	
Handle the given runtime exception thrown by the cache provider when updating an item with the specified key and value, possibly rethrowing it as a fatal exception. 
Params:
exception – the exception thrown by the cache provider
cache – the cache
key – the key used to update the item
value – the value to associate with the key
See Also:
Cache.put(Object, Object)/**
	 * Handle the given runtime exception thrown by the cache provider when
	 * updating an item with the specified {@code key} and {@code value},
	 * possibly rethrowing it as a fatal exception.
	 * @param exception the exception thrown by the cache provider
	 * @param cache the cache
	 * @param key the key used to update the item
	 * @param value the value to associate with the key
	 * @see Cache#put(Object, Object)
	 */
	void handleCachePutError(RuntimeException exception, Cache cache, Object key, @Nullable Object value);

	
Handle the given runtime exception thrown by the cache provider when clearing an item with the specified key, possibly rethrowing it as a fatal exception. 
Params:
exception – the exception thrown by the cache provider
cache – the cache
key – the key used to clear the item/**
	 * Handle the given runtime exception thrown by the cache provider when
	 * clearing an item with the specified {@code key}, possibly rethrowing
	 * it as a fatal exception.
	 * @param exception the exception thrown by the cache provider
	 * @param cache the cache
	 * @param key the key used to clear the item
	 */
	void handleCacheEvictError(RuntimeException exception, Cache cache, Object key);

	
Handle the given runtime exception thrown by the cache provider when clearing the specified Cache, possibly rethrowing it as a fatal exception. 
Params:
exception – the exception thrown by the cache provider
cache – the cache to clear/**
	 * Handle the given runtime exception thrown by the cache provider when
	 * clearing the specified {@link Cache}, possibly rethrowing it as a
	 * fatal exception.
	 * @param exception the exception thrown by the cache provider
	 * @param cache the cache to clear
	 */
	void handleCacheClearError(RuntimeException exception, Cache cache);

}