com.netflix.exhibitor.core.controlpanel.ControlPanelValues.java Source code

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Here is the source code for com.netflix.exhibitor.core.controlpanel.ControlPanelValues.java

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/*
 * Copyright 2012 Netflix, Inc.
 *
 *    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.netflix.exhibitor.core.controlpanel;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.prefs.Preferences;

public class ControlPanelValues {
    private final LoadingCache<ControlPanelTypes, Boolean> cache;
    private final Preferences preferences;

    private static final String BASE_KEY = "com.netflix.exhibitor.control-panel.";

    public ControlPanelValues(final Preferences preferences) {
        this.preferences = preferences;
        cache = CacheBuilder.newBuilder().build(new CacheLoader<ControlPanelTypes, Boolean>() {
            @Override
            public Boolean load(ControlPanelTypes type) throws Exception {
                return preferences.getBoolean(makeKey(type), true);
            }
        });
    }

    public boolean isSet(ControlPanelTypes type) throws Exception {
        return cache.get(type);
    }

    public void set(ControlPanelTypes type, boolean newValue) throws Exception {
        cache.put(type, newValue);
        preferences.putBoolean(makeKey(type), newValue);
        preferences.flush();
    }

    private String makeKey(ControlPanelTypes type) {
        return BASE_KEY + type.name().toLowerCase();
    }
}