| /* |
| * Copyright 2015 Open Networking Laboratory |
| * |
| * 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.onosproject.store.consistent.impl; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import java.io.File; |
| import java.io.IOException; |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.google.common.io.Files; |
| |
| /** |
| * Allows for reading and writing partitioned database definition as a JSON file. |
| */ |
| public class DatabaseDefinitionStore { |
| |
| private final File file; |
| |
| /** |
| * Creates a reader/writer of the database definition file. |
| * |
| * @param filePath location of the definition file |
| */ |
| public DatabaseDefinitionStore(String filePath) { |
| file = new File(checkNotNull(filePath)); |
| } |
| |
| /** |
| * Creates a reader/writer of the database definition file. |
| * |
| * @param filePath location of the definition file |
| */ |
| public DatabaseDefinitionStore(File filePath) { |
| file = checkNotNull(filePath); |
| } |
| |
| /** |
| * Returns the database definition. |
| * |
| * @return database definition |
| * @throws IOException when I/O exception of some sort has occurred. |
| */ |
| public DatabaseDefinition read() throws IOException { |
| ObjectMapper mapper = new ObjectMapper(); |
| return mapper.readValue(file, DatabaseDefinition.class); |
| } |
| |
| /** |
| * Writes the specified database definition to file. |
| * |
| * @param definition database definition |
| * @throws IOException when I/O exception of some sort has occurred. |
| */ |
| public void write(DatabaseDefinition definition) throws IOException { |
| checkNotNull(definition); |
| // write back to file |
| Files.createParentDirs(file); |
| ObjectMapper mapper = new ObjectMapper(); |
| mapper.writeValue(file, definition); |
| } |
| } |