1 /**
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package org.apache.hadoop.hbase.client;
19
20 import java.io.IOException;
21
22 import org.apache.hadoop.hbase.classification.InterfaceAudience;
23
24 /**
25 * Helper callable for internal use when you just want to override a single method of a {@link
26 * RetryingCallable}. By default, this just delegates all {@link RetryingCallable} methods to the
27 * specified delegate.
28 * @param <T> Result class from calls to the delegate {@link RetryingCallable}
29 * @param <D> Type of the delegate class
30 */
31 @InterfaceAudience.Private
32 public class DelegatingRetryingCallable<T, D extends RetryingCallable<T>> implements
33 RetryingCallable<T> {
34 protected final D delegate;
35
36 public DelegatingRetryingCallable(D delegate) {
37 this.delegate = delegate;
38 }
39
40 @Override
41 public T call(int callTimeout) throws Exception {
42 return delegate.call(callTimeout);
43 }
44
45 @Override
46 public void prepare(boolean reload) throws IOException {
47 delegate.prepare(reload);
48 }
49
50 @Override
51 public void throwable(Throwable t, boolean retrying) {
52 delegate.throwable(t, retrying);
53 }
54
55 @Override
56 public String getExceptionMessageAdditionalDetail() {
57 return delegate.getExceptionMessageAdditionalDetail();
58 }
59
60 @Override
61 public long sleep(long pause, int tries) {
62 return delegate.sleep(pause, tries);
63 }
64 }