restconf/sal-rest-connector/src/main/java/org/opendaylight/restconf/restful/utils/DeleteDataTransactionUtil.java

   1 /*
   2  * Copyright (c) 2016 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 package org.opendaylight.restconf.restful.utils;
   9
  10 import com.google.common.util.concurrent.CheckedFuture;
  11 import javax.ws.rs.core.Response;
  12 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  13 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  14 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadWriteTransaction;
  15 import org.opendaylight.restconf.restful.transaction.TransactionVarsWrapper;
  16 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  17
  18 /**
  19  * Util class for delete specific data in config DS.
  20  *
  21  */
  22 public final class DeleteDataTransactionUtil {
  23
  24     private DeleteDataTransactionUtil() {
  25         throw new UnsupportedOperationException("Util class.");
  26     }
  27
  28     /**
  29      * Delete data from DS via transaction.
  30      *
  31      * @param transactionNode
  32      *            - Wrapper for data of transaction
  33      * @return {@link Response}
  34      */
  35     public static Response deleteData(final TransactionVarsWrapper transactionNode) {
  36         final CheckedFuture<Void, TransactionCommitFailedException> future = submitData(
  37                 transactionNode.getTransactionChain().newReadWriteTransaction(),
  38                 transactionNode.getInstanceIdentifier().getInstanceIdentifier());
  39         final ResponseFactory response = new ResponseFactory();
  40         FutureCallbackTx.addCallback(future, RestconfDataServiceConstant.DeleteData.DELETE_TX_TYPE, response);
  41         return response.build();
  42     }
  43
  44     /**
  45      * Delete data via transaction. Return error if data to delete does not exist.
  46      *
  47      * @param readWriteTx
  48      *            - read and write transaction
  49      * @param path
  50      *            - path of data to delete
  51      * @return {@link CheckedFuture}
  52      */
  53     private static CheckedFuture<Void, TransactionCommitFailedException> submitData(
  54             final DOMDataReadWriteTransaction readWriteTx, final YangInstanceIdentifier path) {
  55         TransactionUtil.checkItemExists(readWriteTx, LogicalDatastoreType.CONFIGURATION, path,
  56                 RestconfDataServiceConstant.DeleteData.DELETE_TX_TYPE);
  57         readWriteTx.delete(LogicalDatastoreType.CONFIGURATION, path);
  58         return readWriteTx.submit();
  59     }
  60 }