Java tutorial
// Copyright (c) 2013, Facebook, Inc. All rights reserved. /** * 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 com.facebook.hive.orc; import org.apache.hadoop.conf.Configuration; // All configs in this class also appear in HiveConf, so any changes here should also be made there // This is because only HiveConf can provide type checking through the CLI, and Presto depends on // open source Hive, and so won't work with any variables not in open source HiveConf public class OrcConf { public static enum ConfVars { HIVE_ORC_COMPRESSION("hive.exec.orc.compress", "ZLIB"), HIVE_ORC_ZLIB_COMPRESSION_LEVEL( "hive.exec.orc.compress.zlib.level", 4), HIVE_ORC_COMPRESSION_BLOCK_SIZE( "hive.exec.orc.compress.size", 262144), HIVE_ORC_STRIPE_SIZE("hive.exec.orc.stripe.size", 268435456L), HIVE_ORC_ROW_INDEX_STRIDE("hive.exec.orc.row.index.stride", 10000), HIVE_ORC_CREATE_INDEX("hive.exec.orc.create.index", true), HIVE_ORC_DICTIONARY_NUMERIC_KEY_SIZE_THRESHOLD("hive.exec.orc.dictionary.key.numeric.size.threshold", 0.7f), HIVE_ORC_DICTIONARY_STRING_KEY_SIZE_THRESHOLD( "hive.exec.orc.dictionary.key.string.size.threshold", 0.8f), HIVE_ORC_DICTIONARY_SORT_KEYS("hive.exec.orc.dictionary.key.sorted", true), HIVE_ORC_BUILD_STRIDE_DICTIONARY("hive.exec.orc.build.stride.dictionary", true), HIVE_ORC_MAX_DICTIONARY_SIZE("hive.exec.orc.max.dictionary.size", 104857600), // 100 Mb HIVE_ORC_ENTROPY_KEY_STRING_SIZE_THRESHOLD("hive.exec.orc.entropy.key.string.size.threshold", 0.9f), HIVE_ORC_ENTROPY_STRING_MIN_SAMPLES("hive.exec.orc.entropy.string.min.samples", 100), HIVE_ORC_ENTROPY_STRING_DICT_SAMPLE_FRACTION( "hive.exec.orc.entropy.string.dict.sample.fraction", 0.001f), HIVE_ORC_ENTROPY_STRING_THRESHOLD("hive.exec.orc.entropy.string.threshold", 20), HIVE_ORC_DICTIONARY_ENCODING_INTERVAL("hive.exec.orc.encoding.interval", 30), HIVE_ORC_USE_VINTS( "hive.exec.orc.use.vints", true), HIVE_ORC_READ_COMPRESSION_STRIDES("hive.orc.read.compression.strides", 5), // Maximum fraction of heap that can be used by ORC file writers HIVE_ORC_FILE_MEMORY_POOL("hive.exec.orc.memory.pool", 0.5f), // 50% HIVE_ORC_FILE_MIN_MEMORY_ALLOCATION("hive.exec.orc.min.mem.allocation", 4194304L), // 4 Mb HIVE_ORC_FILE_ENABLE_LOW_MEMORY_MODE("hive.exec.orc.low.memory", false), HIVE_ORC_ROW_BUFFER_SIZE("hive.exec.orc.row.buffer.size", 100), HIVE_ORC_EAGER_HDFS_READ("hive.exec.orc.eager.hdfs.read", true), HIVE_ORC_EAGER_HDFS_READ_BYTES("hive.exec.orc.eager.hdfs.read.bytes", 193986560), // 185 Mb ; public final String varname; public final String defaultVal; public final int defaultIntVal; public final long defaultLongVal; public final float defaultFloatVal; public final boolean defaultBoolVal; ConfVars(String varname, String defaultVal) { this.varname = varname; this.defaultVal = defaultVal; this.defaultIntVal = -1; this.defaultLongVal = -1; this.defaultFloatVal = -1; this.defaultBoolVal = false; } ConfVars(String varname, int defaultIntVal) { this.varname = varname; this.defaultVal = Integer.toString(defaultIntVal); this.defaultIntVal = defaultIntVal; this.defaultLongVal = -1; this.defaultFloatVal = -1; this.defaultBoolVal = false; } ConfVars(String varname, long defaultLongVal) { this.varname = varname; this.defaultVal = Long.toString(defaultLongVal); this.defaultIntVal = -1; this.defaultLongVal = defaultLongVal; this.defaultFloatVal = -1; this.defaultBoolVal = false; } ConfVars(String varname, float defaultFloatVal) { this.varname = varname; this.defaultVal = Float.toString(defaultFloatVal); this.defaultIntVal = -1; this.defaultLongVal = -1; this.defaultFloatVal = defaultFloatVal; this.defaultBoolVal = false; } ConfVars(String varname, boolean defaultBoolVal) { this.varname = varname; this.defaultVal = Boolean.toString(defaultBoolVal); this.defaultIntVal = -1; this.defaultLongVal = -1; this.defaultFloatVal = -1; this.defaultBoolVal = defaultBoolVal; } } public static int getIntVar(Configuration conf, ConfVars var) { return conf.getInt(var.varname, var.defaultIntVal); } public static void setIntVar(Configuration conf, ConfVars var, int val) { conf.setInt(var.varname, val); } public static long getLongVar(Configuration conf, ConfVars var) { return conf.getLong(var.varname, var.defaultLongVal); } public static void setLongVar(Configuration conf, ConfVars var, long val) { conf.setLong(var.varname, val); } public static float getFloatVar(Configuration conf, ConfVars var) { return conf.getFloat(var.varname, var.defaultFloatVal); } public static void setFloatVar(Configuration conf, ConfVars var, float val) { conf.setFloat(var.varname, val); } public static boolean getBoolVar(Configuration conf, ConfVars var) { return conf.getBoolean(var.varname, var.defaultBoolVal); } public static void setBoolVar(Configuration conf, ConfVars var, boolean val) { conf.setBoolean(var.varname, val); } public static String getVar(Configuration conf, ConfVars var) { return conf.get(var.varname, var.defaultVal); } public static void setVar(Configuration conf, ConfVars var, String val) { conf.set(var.varname, val); } }