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/**
 * Copyright (c) 2014, stateful.co
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met: 1) Redistributions of source code must retain the above
 * copyright notice, this list of conditions and the following
 * disclaimer. 2) Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following
 * disclaimer in the documentation and/or other materials provided
 * with the distribution. 3) Neither the name of the stateful.co nor
 * the names of its contributors may be used to endorse or promote
 * products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package co.stateful;

import com.jcabi.aspects.Immutable;
import java.io.IOException;
import javax.validation.constraints.NotNull;

/**
 * Counters.
 *
 * @author Yegor Bugayenko ([email protected])
 * @version $Id$
 * @since 0.1
 */
@Immutable
public interface Counters {

    /**
     * Get list of them all.
     * @return List of counter names
     * @throws IOException If some I/O problem
     */
    @NotNull
    Iterable names() throws IOException;

    /**
     * Create a counter.
     * @param name Name of it
     * @return Counter
     * @throws IOException If some I/O problem
     */
    @NotNull
    Counter create(String name) throws IOException;

    /**
     * Delete a counter.
     * @param name Name of it
     * @throws IOException If some I/O problem
     */
    void delete(String name) throws IOException;

    /**
     * Get one counter by name.
     * @param name Name of it
     * @return Counter
     * @throws IOException If some I/O problem
     */
    @NotNull
    Counter get(String name) throws IOException;

}