| /* |
| * 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 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 org.apache.cassandra.schema; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.base.Objects; |
| import com.google.common.collect.ImmutableMap; |
| import org.apache.commons.lang3.StringUtils; |
| |
| import org.apache.cassandra.exceptions.ConfigurationException; |
| |
| import static java.lang.String.format; |
| |
| // CQL: {'keys' : 'ALL'|'NONE', 'rows_per_partition': '200'|'NONE'|'ALL'} |
| public final class CachingParams |
| { |
| public enum Option |
| { |
| KEYS, |
| ROWS_PER_PARTITION; |
| |
| @Override |
| public String toString() |
| { |
| return name().toLowerCase(); |
| } |
| } |
| |
| private static final String ALL = "ALL"; |
| private static final String NONE = "NONE"; |
| |
| static final boolean DEFAULT_CACHE_KEYS = true; |
| static final int DEFAULT_ROWS_PER_PARTITION_TO_CACHE = 0; |
| |
| public static final CachingParams CACHE_NOTHING = new CachingParams(false, 0); |
| public static final CachingParams CACHE_KEYS = new CachingParams(true, 0); |
| public static final CachingParams CACHE_EVERYTHING = new CachingParams(true, Integer.MAX_VALUE); |
| |
| @VisibleForTesting |
| public static CachingParams DEFAULT = new CachingParams(DEFAULT_CACHE_KEYS, DEFAULT_ROWS_PER_PARTITION_TO_CACHE); |
| |
| final boolean cacheKeys; |
| final int rowsPerPartitionToCache; |
| |
| public CachingParams(boolean cacheKeys, int rowsPerPartitionToCache) |
| { |
| this.cacheKeys = cacheKeys; |
| this.rowsPerPartitionToCache = rowsPerPartitionToCache; |
| } |
| |
| public boolean cacheKeys() |
| { |
| return cacheKeys; |
| } |
| |
| public boolean cacheRows() |
| { |
| return rowsPerPartitionToCache > 0; |
| } |
| |
| public boolean cacheAllRows() |
| { |
| return rowsPerPartitionToCache == Integer.MAX_VALUE; |
| } |
| |
| public int rowsPerPartitionToCache() |
| { |
| return rowsPerPartitionToCache; |
| } |
| |
| public static CachingParams fromMap(Map<String, String> map) |
| { |
| Map<String, String> copy = new HashMap<>(map); |
| |
| String keys = copy.remove(Option.KEYS.toString()); |
| boolean cacheKeys = keys != null && keysFromString(keys); |
| |
| String rows = copy.remove(Option.ROWS_PER_PARTITION.toString()); |
| int rowsPerPartitionToCache = rows == null |
| ? 0 |
| : rowsPerPartitionFromString(rows); |
| |
| if (!copy.isEmpty()) |
| { |
| throw new ConfigurationException(format("Invalid caching sub-options %s: only '%s' and '%s' are allowed", |
| copy.keySet(), |
| Option.KEYS, |
| Option.ROWS_PER_PARTITION)); |
| } |
| |
| return new CachingParams(cacheKeys, rowsPerPartitionToCache); |
| } |
| |
| public Map<String, String> asMap() |
| { |
| return ImmutableMap.of(Option.KEYS.toString(), |
| keysAsString(), |
| Option.ROWS_PER_PARTITION.toString(), |
| rowsPerPartitionAsString()); |
| } |
| |
| private static boolean keysFromString(String value) |
| { |
| if (value.equalsIgnoreCase(ALL)) |
| return true; |
| |
| if (value.equalsIgnoreCase(NONE)) |
| return false; |
| |
| throw new ConfigurationException(format("Invalid value '%s' for caching sub-option '%s': only '%s' and '%s' are allowed", |
| value, |
| Option.KEYS, |
| ALL, |
| NONE)); |
| } |
| |
| String keysAsString() |
| { |
| return cacheKeys ? ALL : NONE; |
| } |
| |
| private static int rowsPerPartitionFromString(String value) |
| { |
| if (value.equalsIgnoreCase(ALL)) |
| return Integer.MAX_VALUE; |
| |
| if (value.equalsIgnoreCase(NONE)) |
| return 0; |
| |
| if (StringUtils.isNumeric(value)) |
| return Integer.parseInt(value); |
| |
| throw new ConfigurationException(format("Invalid value '%s' for caching sub-option '%s':" |
| + " only '%s', '%s', and integer values are allowed", |
| value, |
| Option.ROWS_PER_PARTITION, |
| ALL, |
| NONE)); |
| } |
| |
| String rowsPerPartitionAsString() |
| { |
| if (rowsPerPartitionToCache == 0) |
| return NONE; |
| else if (rowsPerPartitionToCache == Integer.MAX_VALUE) |
| return ALL; |
| else |
| return Integer.toString(rowsPerPartitionToCache); |
| } |
| |
| @Override |
| public String toString() |
| { |
| return format("{'%s' : '%s', '%s' : '%s'}", |
| Option.KEYS, |
| keysAsString(), |
| Option.ROWS_PER_PARTITION, |
| rowsPerPartitionAsString()); |
| } |
| |
| @Override |
| public boolean equals(Object o) |
| { |
| if (this == o) |
| return true; |
| |
| if (!(o instanceof CachingParams)) |
| return false; |
| |
| CachingParams c = (CachingParams) o; |
| |
| return cacheKeys == c.cacheKeys && rowsPerPartitionToCache == c.rowsPerPartitionToCache; |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| return Objects.hashCode(cacheKeys, rowsPerPartitionToCache); |
| } |
| } |