2 * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
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
8 package org.opendaylight.restconf.nb.rfc8040.handlers;
10 import java.util.Objects;
11 import java.util.Queue;
12 import java.util.concurrent.ConcurrentLinkedQueue;
13 import javax.annotation.PreDestroy;
14 import javax.inject.Inject;
15 import javax.inject.Singleton;
16 import org.opendaylight.mdsal.dom.api.DOMDataBroker;
17 import org.opendaylight.mdsal.dom.api.DOMDataTreeTransaction;
18 import org.opendaylight.mdsal.dom.api.DOMTransactionChain;
19 import org.opendaylight.mdsal.dom.api.DOMTransactionChainListener;
20 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
21 import org.slf4j.Logger;
22 import org.slf4j.LoggerFactory;
25 * Implementation of {@link TransactionChainHandler}.
28 public class TransactionChainHandler implements Handler<DOMTransactionChain>, AutoCloseable {
29 private static final Logger LOG = LoggerFactory.getLogger(TransactionChainHandler.class);
31 private final DOMTransactionChainListener transactionChainListener = new DOMTransactionChainListener() {
33 public void onTransactionChainFailed(final DOMTransactionChain chain, final DOMDataTreeTransaction transaction,
34 final Throwable cause) {
35 LOG.warn("TransactionChain({}) {} FAILED!", chain, transaction.getIdentifier(), cause);
36 transactionChainList.remove(chain);
37 throw new RestconfDocumentedException("TransactionChain(" + chain + ") not committed correctly", cause);
41 public void onTransactionChainSuccessful(final DOMTransactionChain chain) {
42 LOG.trace("TransactionChain({}) SUCCESSFUL", chain);
43 transactionChainList.remove(chain);
47 private final DOMDataBroker dataBroker;
48 private final Queue<DOMTransactionChain> transactionChainList;
51 * Prepare transaction chain service for Restconf services.
54 public TransactionChainHandler(final DOMDataBroker dataBroker) {
55 this.dataBroker = Objects.requireNonNull(dataBroker);
56 this.transactionChainList = new ConcurrentLinkedQueue<>();
60 * Create and return new instance of object {@link DOMTransactionChain}.
61 * After use, is important to close transactionChain by method {@link DOMTransactionChain#close()}.
62 * @return new instance of object {@link DOMTransactionChain}
65 public DOMTransactionChain get() {
66 final DOMTransactionChain transactionChain = dataBroker.createTransactionChain(transactionChainListener);
67 this.transactionChainList.add(transactionChain);
68 LOG.trace("Started TransactionChain({})", transactionChain);
69 return transactionChain;
74 public synchronized void close() {
75 for (DOMTransactionChain transactionChain: this.transactionChainList) {
76 transactionChain.close();
77 LOG.trace("Closed TransactionChain({})", transactionChain);
82 * Verify if {@link DOMTransactionChain} exist in {@link TransactionChainHandler} queue.
83 * @param transactionChain object to check.
84 * @return true if object still exist in {@link TransactionChainHandler}.
86 boolean verifyIfExistTransactionChain(DOMTransactionChain transactionChain) {
87 return this.transactionChainList.contains(transactionChain);