2 * Copyright (c) 2014 Brocade Communications 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
9 package org.opendaylight.controller.md.sal.common.api.data;
11 import com.google.common.base.Supplier;
12 import org.opendaylight.yangtools.yang.common.RpcError;
13 import org.opendaylight.yangtools.yang.common.RpcError.ErrorType;
14 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
17 * A type of TransactionCommitFailedException that indicates a situation that would result in a
18 * threading deadlock. This can occur if a caller that submits a write transaction tries to perform
19 * a blocking call via one of the <code>get</code> methods on the returned ListenableFuture. Callers
20 * should process the commit result asynchronously (via Futures#addCallback) to ensure deadlock
23 * @author Thomas Pantelis
25 public class TransactionCommitDeadlockException extends TransactionCommitFailedException {
26 private static final long serialVersionUID = 1L;
27 private static final String DEADLOCK_MESSAGE =
28 "An attempt to block on a ListenableFuture via a get method from a write " +
29 "transaction submit was detected that would result in deadlock. The commit " +
30 "result must be obtained asynchronously, e.g. via Futures#addCallback, to avoid deadlock.";
31 private static final RpcError DEADLOCK_RPCERROR = RpcResultBuilder.newError(ErrorType.APPLICATION, "lock-denied", DEADLOCK_MESSAGE);
33 public static final Supplier<Exception> DEADLOCK_EXCEPTION_SUPPLIER = new Supplier<Exception>() {
35 public Exception get() {
36 return new TransactionCommitDeadlockException(DEADLOCK_MESSAGE, DEADLOCK_RPCERROR);
40 public TransactionCommitDeadlockException(final String message, final RpcError... errors) {
41 super(message, errors);