| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.tuweni.trie |
| |
| import org.apache.tuweni.bytes.Bytes |
| import org.apache.tuweni.bytes.Bytes32 |
| import org.apache.tuweni.concurrent.AsyncCompletion |
| import org.apache.tuweni.concurrent.AsyncResult |
| import org.apache.tuweni.concurrent.coroutines.await |
| |
| /** |
| * Storage for use in a [StoredMerklePatriciaTrie]. |
| */ |
| interface MerkleStorage { |
| |
| /** |
| * Get the stored content under the given hash. |
| * |
| * @param hash The hash for the content. |
| * @return The stored content, or {@code null} if not found. |
| */ |
| suspend fun get(hash: Bytes32): Bytes? |
| |
| /** |
| * Store content with a given hash. |
| * |
| * Note: if the storage implementation already contains content for the given hash, it does not need to replace the |
| * existing content. |
| * |
| * @param hash The hash for the content. |
| * @param content The content to store. |
| */ |
| suspend fun put(hash: Bytes32, content: Bytes) |
| } |
| |
| /** |
| * A [MerkleStorage] implementation using [AsyncResult]'s. |
| */ |
| abstract class AsyncMerkleStorage : MerkleStorage { |
| override suspend fun get(hash: Bytes32): Bytes? = getAsync(hash).await() |
| |
| /** |
| * Get the stored content under the given hash. |
| * |
| * @param hash The hash for the content. |
| * @return An [AsyncResult] that will complete with the stored content or {@code null} if not found. |
| */ |
| abstract fun getAsync(hash: Bytes32): AsyncResult<Bytes?> |
| |
| override suspend fun put(hash: Bytes32, content: Bytes) = putAsync(hash, content).await() |
| |
| /** |
| * Store content with a given hash. |
| * |
| * Note: if the storage implementation already contains content for the given hash, it does not need to replace the |
| * existing content. |
| * |
| * @param hash The hash for the content. |
| * @param content The content to store. |
| * @return An [AsyncCompletion] that will complete when the content is stored. |
| */ |
| abstract fun putAsync(hash: Bytes32, content: Bytes): AsyncCompletion |
| } |