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.spi;
31
32 import com.jcabi.aspects.Immutable;
33 import java.io.IOException;
34
35 /**
36 * Counters.
37 *
38 * @author Yegor Bugayenko (yegor@tpc2.com)
39 * @version $Id$
40 */
41 @Immutable
42 public interface Counters {
43
44 /**
45 * Maximum allowed per account.
46 */
47 int MAX = 64;
48
49 /**
50 * Get list of them all.
51 * @return List of counter names
52 * @throws IOException If fails
53 */
54 Iterable<String> names() throws IOException;
55
56 /**
57 * Create a counter.
58 * @param name Name of it
59 * @throws IOException If fails due to IO problem
60 */
61 void create(String name) throws IOException;
62
63 /**
64 * Delete a counter.
65 * @param name Name of it
66 * @throws IOException If fails
67 */
68 void delete(String name) throws IOException;
69
70 /**
71 * Get one counter by name.
72 * @param name Name of it
73 * @return Counter
74 */
75 Counter get(String name);
76
77 }