opendaylight/config/config-persister-directory-xml-adapter/src/main/java/org/opendaylight/controller/config/persist/storage/directory/xml/XmlDirectoryStorageAdapter.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.controller.config.persist.storage.directory.xml;
  10
  11 import com.google.common.base.Preconditions;
  12 import org.opendaylight.controller.config.persist.api.Persister;
  13 import org.opendaylight.controller.config.persist.api.PropertiesProvider;
  14 import org.opendaylight.controller.config.persist.api.StorageAdapter;
  15 import org.slf4j.Logger;
  16 import org.slf4j.LoggerFactory;
  17
  18 import java.io.File;
  19
  20 /**
  21  * StorageAdapter that retrieves initial configuration from a directory. If multiple files are present, snapshot and
  22  * required capabilities will be merged together. Writing to this persister is not supported.
  23  */
  24 public class XmlDirectoryStorageAdapter implements StorageAdapter {
  25     private static final Logger logger = LoggerFactory.getLogger(XmlDirectoryStorageAdapter.class);
  26
  27     public static final String DIRECTORY_STORAGE_PROP = "directoryStorage";
  28
  29
  30     @Override
  31     public Persister instantiate(PropertiesProvider propertiesProvider) {
  32         String fileStorageProperty = propertiesProvider.getProperty(DIRECTORY_STORAGE_PROP);
  33         Preconditions.checkNotNull(fileStorageProperty, "Unable to find " + propertiesProvider.getFullKeyForReporting(DIRECTORY_STORAGE_PROP));
  34         File storage  = new File(fileStorageProperty);
  35         logger.debug("Using {}", storage);
  36         return new XmlDirectoryPersister(storage);
  37     }
  38
  39 }