dev.ikm.tinkar.common.service.ServiceProperties Maven / Gradle / Ivy

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/*
 * Copyright © 2015 Integrated Knowledge Management ([email protected])
 *
 * 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 dev.ikm.tinkar.common.service;

import com.google.auto.service.AutoService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Optional;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;

public class ServiceProperties {
    private static final Logger LOG = LoggerFactory.getLogger(ServiceProperties.class);
    private static final ConcurrentHashMap propertyMap = new ConcurrentHashMap<>();

    static {
        propertyMap.putIfAbsent(ServiceKeys.JVM_UUID, UUID.randomUUID());
        propertyMap.putIfAbsent(ServiceKeys.CACHE_PERIOD_UUID, UUID.randomUUID());
    }

    public ServiceProperties() {
    }

    public static final  T get(Enum enumKey, T defaultValue) {
        if (propertyMap.containsKey(enumKey)) {
            return (T) propertyMap.get(enumKey);
        }
        return defaultValue;
    }

    public static final void set(Enum enumKey, Object value) {
        propertyMap.put(enumKey, value);
    }

    public static final String jvmUuid() {
        Optional jvmUuidOptional = ServiceProperties.get(ServiceKeys.JVM_UUID);
        StringBuilder infoString = new StringBuilder();
        if (jvmUuidOptional.isPresent()) {
            infoString.append("JVM UUID: " + jvmUuidOptional.get());
        } else {
            infoString.append("JVM UUID: Not initialized");
        }
        Optional cachePeriodUuidOptional = ServiceProperties.get(ServiceKeys.CACHE_PERIOD_UUID);
        if (cachePeriodUuidOptional.isPresent()) {
            infoString.append(" Cache period UUID: " + cachePeriodUuidOptional.get());
        } else {
            infoString.append(" Cache period UUID: Not initialized ");
        }
        return infoString.toString();
    }

    public static final  Optional get(Enum enumKey) {
        return Optional.ofNullable((T) propertyMap.get(enumKey));
    }


    @AutoService(CachingService.class)
    public static class CacheProvider implements CachingService {

        @Override
        public void reset() {
            UUID currentUuid = (UUID) propertyMap.get(ServiceKeys.JVM_UUID);
            LOG.info("Resetting ServiceProperties for: " + currentUuid);
            propertyMap.clear();
            propertyMap.put(ServiceKeys.JVM_UUID, currentUuid);
            propertyMap.putIfAbsent(ServiceKeys.CACHE_PERIOD_UUID, UUID.randomUUID());
        }
    }

}