1 /**
2 * Copyright (c) 2014, stateful.co
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met: 1) Redistributions of source code must retain the above
8 * copyright notice, this list of conditions and the following
9 * disclaimer. 2) Redistributions in binary form must reproduce the above
10 * copyright notice, this list of conditions and the following
11 * disclaimer in the documentation and/or other materials provided
12 * with the distribution. 3) Neither the name of the stateful.co nor
13 * the names of its contributors may be used to endorse or promote
14 * products derived from this software without specific prior written
15 * permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
19 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
28 * OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30 package co.stateful.quota;
31
32 import co.stateful.spi.Counter;
33 import com.jcabi.aspects.Immutable;
34 import com.jcabi.aspects.Loggable;
35 import java.io.IOException;
36 import java.math.BigDecimal;
37 import lombok.EqualsAndHashCode;
38 import lombok.ToString;
39
40 /**
41 * Quota on counter.
42 *
43 * @author Yegor Bugayenko (yegor@tpc2.com)
44 * @version $Id$
45 * @since 1.4
46 */
47 @Immutable
48 @ToString
49 @EqualsAndHashCode(of = { "origin", "quota" })
50 @Loggable(Loggable.DEBUG)
51 public final class QtCounter implements Counter {
52
53 /**
54 * Original object.
55 */
56 private final transient Counter origin;
57
58 /**
59 * Quota to use.
60 */
61 private final transient Quota quota;
62
63 /**
64 * Ctor.
65 * @param org Original object
66 * @param qta Quota
67 */
68 public QtCounter(final Counter org, final Quota qta) {
69 this.origin = org;
70 this.quota = qta;
71 }
72
73 @Override
74 public void set(final BigDecimal value) throws IOException {
75 this.quota.use("set");
76 this.origin.set(value);
77 }
78
79 @Override
80 public BigDecimal increment(final BigDecimal delta) throws IOException {
81 this.quota.use("inc");
82 return this.origin.increment(delta);
83 }
84 }