1 /***
2 * Copyright 2003-2010 Terracotta, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package net.sf.ehcache.util;
18
19 import java.util.concurrent.Callable;
20 import java.util.concurrent.TimeUnit;
21
22 import net.sf.ehcache.Ehcache;
23 import net.sf.ehcache.Element;
24 import net.sf.ehcache.store.Store;
25
26 import org.hamcrest.Matcher;
27 import org.junit.Assert;
28
29 public class RetryAssert {
30 private static final long WAIT_TIME = 100L;
31
32 protected RetryAssert() {
33
34 }
35
36 public static <T> void assertBy(long time, TimeUnit unit, Callable<T> value, Matcher<? super T> matcher) {
37 boolean interrupted = false;
38 long start = System.nanoTime();
39 long end = start + unit.toNanos(time);
40 long sleep = Math.max(50, unit.toMillis(time) / 10);
41 AssertionError latest;
42 try {
43 while (true) {
44 try {
45 Assert.assertThat(value.call(), matcher);
46 return;
47 } catch (AssertionError e) {
48 latest = e;
49 } catch (Exception e) {
50 latest = new AssertionError(e);
51 }
52
53 if (System.nanoTime() > end) {
54 break;
55 } else {
56 try {
57 Thread.sleep(sleep);
58 } catch (InterruptedException e) {
59 interrupted = true;
60 }
61 }
62 }
63 } finally {
64 if (interrupted) {
65 Thread.currentThread().interrupt();
66 }
67 }
68 throw latest;
69 }
70
71 public static Callable<Element> elementAt(final Ehcache cache, final Object key) {
72 return new Callable<Element>() {
73 public Element call() {
74 return cache.get(key);
75 }
76 };
77 }
78
79 public static Callable<Integer> sizeOf(final Ehcache cache) {
80 return new Callable<Integer>() {
81 public Integer call() throws Exception {
82 return cache.getSize();
83 }
84 };
85 }
86
87 public static Callable<Integer> sizeOnDiskOf(final Store store) {
88 return new Callable<Integer>() {
89 public Integer call() throws Exception {
90 return store.getOnDiskSize();
91 }
92 };
93 }
94 }