com.spotify.dns.StaticChangeNotifier.java Source code

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Here is the source code for com.spotify.dns.StaticChangeNotifier.java

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/*
 * Copyright (c) 2015 Spotify AB
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.spotify.dns;

import com.google.common.collect.ImmutableSet;

import java.util.Set;

/**
 * A {@link ChangeNotifier} that provides a static set of records.
 */
class StaticChangeNotifier<T> extends AbstractChangeNotifier<T> {

    private final Set<T> records;

    /**
     * Create a static {@link ChangeNotifier}.
     *
     * @param records The records to provide.
     */
    StaticChangeNotifier(final Set<T> records) {
        this.records = ImmutableSet.copyOf(records);
    }

    @Override
    public Set<T> current() {
        return records;
    }

    @Override
    protected void closeImplementation() {
    }
}