| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you maynot 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 applicablelaw 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 org.apache.phoenix.cache; |
| |
| import com.google.common.cache.CacheBuilder; |
| import com.google.common.cache.CacheLoader; |
| import com.google.common.cache.LoadingCache; |
| import com.google.common.util.concurrent.UncheckedExecutionException; |
| import java.nio.ByteBuffer; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.TimeUnit; |
| import org.apache.hadoop.hbase.io.ImmutableBytesWritable; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.phoenix.schema.IllegalDataException; |
| import org.joda.time.DateTimeZone; |
| |
| public class JodaTimezoneCache { |
| |
| public static final int CACHE_EXPRIRE_TIME_MINUTES = 10; |
| private static final LoadingCache<ByteBuffer, DateTimeZone> cachedJodaTimeZones = createTimezoneCache(); |
| |
| /** |
| * Returns joda's DateTimeZone instance from cache or create new instance and cache it. |
| * |
| * @param timezoneId Timezone Id as accepted by {@code DateTimeZone.forID()}. E.g. Europe/Isle_of_Man |
| * @return joda's DateTimeZone instance |
| * @throws IllegalDataException if unknown timezone id is passed |
| */ |
| public static DateTimeZone getInstance(ByteBuffer timezoneId) { |
| try { |
| return cachedJodaTimeZones.get(timezoneId); |
| } catch (ExecutionException ex) { |
| throw new IllegalDataException(ex); |
| } catch (UncheckedExecutionException e) { |
| throw new IllegalDataException("Unknown timezone " + Bytes.toString(timezoneId.array())); |
| } |
| } |
| |
| /** |
| * Returns joda's DateTimeZone instance from cache or create new instance and cache it. |
| * |
| * @param timezoneId Timezone Id as accepted by {@code DateTimeZone.forID()}. E.g. Europe/Isle_of_Man |
| * @return joda's DateTimeZone instance |
| * @throws IllegalDataException if unknown timezone id is passed |
| */ |
| public static DateTimeZone getInstance(ImmutableBytesWritable timezoneId) { |
| return getInstance(ByteBuffer.wrap(timezoneId.copyBytes())); |
| } |
| |
| /** |
| * Returns joda's DateTimeZone instance from cache or create new instance and cache it. |
| * |
| * @param timezoneId Timezone Id as accepted by {@code DateTimeZone.forID()}. E.g. Europe/Isle_of_Man |
| * @return joda's DateTimeZone instance |
| * @throws IllegalDataException if unknown timezone id is passed |
| */ |
| public static DateTimeZone getInstance(String timezoneId) { |
| return getInstance(ByteBuffer.wrap(Bytes.toBytes(timezoneId))); |
| } |
| |
| private static LoadingCache<ByteBuffer, DateTimeZone> createTimezoneCache() { |
| return CacheBuilder.newBuilder().expireAfterAccess(CACHE_EXPRIRE_TIME_MINUTES, TimeUnit.MINUTES).build(new CacheLoader<ByteBuffer, DateTimeZone>() { |
| |
| @Override |
| public DateTimeZone load(ByteBuffer timezone) throws Exception { |
| return DateTimeZone.forID(Bytes.toString(timezone.array())); |
| } |
| }); |
| } |
| |
| } |