com.netbout.dynamo.Everybody Maven / Gradle / Ivy
/**
* Copyright (c) 2009-2016, netbout.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are PROHIBITED without prior written permission from
* the author. This product may NOT be used anywhere and on any computer
* except the server platform of netbout Inc. located at www.netbout.com.
* Federal copyright law prohibits unauthorized reproduction by any means
* and imposes fines up to $25,000 for violation. If you received
* this code accidentally and without intent to use it, please report this
* incident to the author by email.
*
* 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
* OWNER 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 com.netbout.dynamo;
import com.jcabi.aspects.Immutable;
import com.jcabi.aspects.Loggable;
import com.jcabi.aspects.Tv;
import com.jcabi.dynamo.Conditions;
import com.jcabi.dynamo.QueryValve;
import com.jcabi.dynamo.Region;
import lombok.EqualsAndHashCode;
import lombok.ToString;
/**
* Everybody.
*
* @author Yegor Bugayenko ([email protected])
* @version $Id: 17b6b57bb1e20a97cf5065b5654c8269c21feb28 $
* @since 2.0
*/
@Immutable
@Loggable(Loggable.DEBUG)
@ToString
@EqualsAndHashCode(of = "region")
final class Everybody {
/**
* Region to work with.
*/
private final transient Region region;
/**
* Ctor.
* @param reg Region we're in
*/
Everybody(final Region reg) {
this.region = reg;
}
/**
* This name is occupied.
* @param name The name
* @return TRUE if occupied
*/
public boolean occupied(final String name) {
if (name.isEmpty()) {
throw new IllegalArgumentException("alias can't be empty");
}
if (name.length() > Tv.HUNDRED) {
throw new IllegalArgumentException("alias is too long");
}
return this.region.table(DyAliases.TBL).frame()
.through(new QueryValve().withLimit(1))
.where(DyAliases.HASH, Conditions.equalTo(name))
.iterator()
.hasNext();
}
}