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.yangtools.util.concurrent;
11 import com.google.common.base.Function;
12 import com.google.common.base.Preconditions;
13 import com.google.common.util.concurrent.AbstractCheckedFuture;
14 import com.google.common.util.concurrent.ListenableFuture;
15 import java.util.concurrent.CancellationException;
16 import java.util.concurrent.ExecutionException;
17 import java.util.concurrent.TimeUnit;
18 import java.util.concurrent.TimeoutException;
19 import javax.annotation.Nonnull;
22 * An implementation of CheckedFuture that provides similar behavior for the <code>get</code> methods
23 * that the <code>checkedGet</code> methods provide.
25 * <p>For {@link CancellationException} and {@link InterruptedException}, the specified exception mapper
26 * is invoked to translate them to the checked exception type.
28 * <p>For {@link ExecutionException}, the mapper is invoked to translate the cause to the checked exception
29 * and a new ExecutionException is thrown with the translated cause.
31 * @author Thomas Pantelis
33 * @param <V> The result type returned by this Future's get method
34 * @param <X> The checked exception type
36 public final class MappingCheckedFuture<V, X extends Exception> extends AbstractCheckedFuture<V, X> {
38 private final Function<Exception, X> mapper;
40 private MappingCheckedFuture(final ListenableFuture<V> delegate, final Function<Exception, X> mapper) {
42 this.mapper = Preconditions.checkNotNull(mapper);
46 * Creates a new <code>MappingCheckedFuture</code> that wraps the given {@link ListenableFuture}
49 * @param delegate the {@link ListenableFuture} to wrap
50 * @param mapper the mapping {@link Function} used to translate exceptions from the delegate
51 * @return a new <code>MappingCheckedFuture</code>
53 public static <V, X extends Exception> MappingCheckedFuture<V, X> create(
54 final ListenableFuture<V> delegate, final Function<Exception, X> mapper) {
55 return new MappingCheckedFuture<>(delegate, mapper);
59 @SuppressWarnings("checkstyle:parameterName")
60 protected X mapException(@Nonnull final Exception e) {
61 return mapper.apply(e);
64 private ExecutionException wrapInExecutionException(final String message, final Exception ex) {
65 return new ExecutionException(message, mapException(ex));
69 public V get() throws InterruptedException, ExecutionException {
72 } catch (final InterruptedException e) {
73 Thread.currentThread().interrupt();
74 throw wrapInExecutionException("Operation was interrupted", e);
75 } catch (final CancellationException e) {
76 throw wrapInExecutionException("Operation was cancelled", e);
77 } catch (final ExecutionException e) {
78 throw wrapInExecutionException(e.getMessage(), e);
83 public V get(final long timeout, @Nonnull final TimeUnit unit)
84 throws InterruptedException, ExecutionException, TimeoutException {
86 return super.get(timeout, unit);
87 } catch (final InterruptedException e) {
88 Thread.currentThread().interrupt();
89 throw wrapInExecutionException("Operation was interrupted", e);
90 } catch (final CancellationException e) {
91 throw wrapInExecutionException("Operation was cancelled", e);
92 } catch (final ExecutionException e) {
93 throw wrapInExecutionException(e.getMessage(), e);