| /** |
| * 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.storm.blobstore; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.util.regex.Pattern; |
| import org.apache.storm.generated.SettableBlobMeta; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Provides an base implementation for creating a blobstore based on file backed storage. |
| */ |
| public abstract class BlobStoreFile { |
| public static final Logger LOG = LoggerFactory.getLogger(BlobStoreFile.class); |
| |
| protected static final String TMP_EXT = ".tmp"; |
| protected static final Pattern TMP_NAME_PATTERN = Pattern.compile("^\\d+\\" + TMP_EXT + "$"); |
| protected static final String BLOBSTORE_DATA_FILE = "data"; |
| |
| public abstract void delete() throws IOException; |
| |
| public abstract String getKey(); |
| |
| public abstract boolean isTmp(); |
| |
| public abstract SettableBlobMeta getMetadata(); |
| |
| public abstract void setMetadata(SettableBlobMeta meta); |
| |
| public abstract long getModTime() throws IOException; |
| |
| public abstract InputStream getInputStream() throws IOException; |
| |
| public abstract OutputStream getOutputStream() throws IOException; |
| |
| public abstract void commit() throws IOException; |
| |
| public abstract void cancel() throws IOException; |
| |
| public abstract long getFileLength() throws IOException; |
| } |