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ASF GitHub Bot commented on NIFI-4504: -------------------------------------- Github user ijokarumawak commented on a diff in the pull request: https://github.com/apache/nifi/pull/2284#discussion_r158756282 --- Diff: nifi-nar-bundles/nifi-standard-services/nifi-distributed-cache-client-service-api/src/main/java/org/apache/nifi/distributed/cache/client/DistributedMapCacheClient.java --- @@ -166,6 +166,21 @@ */ <K> boolean remove(K key, Serializer<K> serializer) throws IOException; + /** + * Removes the entry with the given key from the cache, if it is present, + * and returns the value that was removed from the map. + * + * @param <K> type of key + * @param <V> type of value + * @param key key + * @param keySerializer key serializer + * @param valueDeserializer value deserializer + * @return the value previously associated with the key, or null if there was no mapping + * null can also indicate that the map previously associated null with the key + * @throws IOException ex + */ + <K, V> V removeAndGet(K key, Serializer<K> keySerializer, Deserializer<V> valueDeserializer) throws IOException; --- End diff -- This new method should have a default implementation which throws UnsupportedOperationException. > SimpleMapCache/PersistentMapCache: Add removeAndGet and removeByPatternAndGet > ----------------------------------------------------------------------------- > > Key: NIFI-4504 > URL: https://issues.apache.org/jira/browse/NIFI-4504 > Project: Apache NiFi > Issue Type: Improvement > Affects Versions: 1.4.0 > Reporter: Jon Kessler > Assignee: Michael Moser > Priority: Minor > > Typical map implementations return the value that was removed when performing > a remove. Because you couldn't update the existing remove methods without it > being a breaking change I suggest adding new versions of the remove and > removeByPattern methods that return the removed value(s). > These changes should also be applied up the chain to any class that makes use > of these classes such as the MapCacheServer and > AtomicDistributedMapCacheClient. -- This message was sent by Atlassian JIRA (v6.4.14#64029)