org.elasticsearch.common.settings.Settings Maven / Gradle / Ivy
/*
* Licensed to ElasticSearch and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. ElasticSearch 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.elasticsearch.common.settings;
import com.google.common.collect.ImmutableMap;
import org.elasticsearch.Version;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.unit.ByteSizeValue;
import org.elasticsearch.common.unit.SizeValue;
import org.elasticsearch.common.unit.TimeValue;
import java.util.Map;
/**
* Immutable settings allowing to control the configuration.
*
* Using {@link ImmutableSettings#settingsBuilder()} in order to create a builder
* which in turn can create an immutable implementation of settings.
*
* @see ImmutableSettings
*/
public interface Settings {
/**
* Component settings for a specific component. Returns all the settings for the given class, where the
* FQN of the class is used, without the org.elasticsearch prefix. If there is no org.elasticsearch
* prefix, then the prefix used is the first part of the package name (org / com / ...)
*/
Settings getComponentSettings(Class component);
/**
* Component settings for a specific component. Returns all the settings for the given class, where the
* FQN of the class is used, without provided prefix.
*/
Settings getComponentSettings(String prefix, Class component);
/**
* A settings that are filtered (and key is removed) with the specified prefix.
*/
Settings getByPrefix(String prefix);
/**
* The class loader associated with this settings, or {@link org.elasticsearch.common.Classes#getDefaultClassLoader()}
* if not set.
*/
ClassLoader getClassLoader();
/**
* The class loader associated with this settings, but only if explicitly set, otherwise null.
*/
@Nullable
ClassLoader getClassLoaderIfSet();
/**
* The settings as a {@link java.util.Map}.
*/
ImmutableMap getAsMap();
/**
* Returns the setting value associated with the setting key.
*
* @param setting The setting key
* @return The setting value, null if it does not exists.
*/
String get(String setting);
/**
* Returns the setting value associated with the first setting key.
*/
String get(String[] settings);
/**
* Returns the setting value associated with the setting key. If it does not exists,
* returns the default value provided.
*/
String get(String setting, String defaultValue);
/**
* Returns the setting value associated with the first setting key, if none exists,
* returns the default value provided.
*/
String get(String[] settings, String defaultValue);
/**
* Returns group settings for the given setting prefix.
*/
Map getGroups(String settingPrefix) throws SettingsException;
/**
* Returns the setting value (as float) associated with the setting key. If it does not exists,
* returns the default value provided.
*/
Float getAsFloat(String setting, Float defaultValue) throws SettingsException;
/**
* Returns the setting value (as float) associated with teh first setting key, if none
* exists, returns the default value provided.
*/
Float getAsFloat(String[] settings, Float defaultValue) throws SettingsException;
/**
* Returns the setting value (as double) associated with the setting key. If it does not exists,
* returns the default value provided.
*/
Double getAsDouble(String setting, Double defaultValue) throws SettingsException;
/**
* Returns the setting value (as double) associated with teh first setting key, if none
* exists, returns the default value provided.
*/
Double getAsDouble(String[] settings, Double defaultValue) throws SettingsException;
/**
* Returns the setting value (as int) associated with the setting key. If it does not exists,
* returns the default value provided.
*/
Integer getAsInt(String setting, Integer defaultValue) throws SettingsException;
/**
* Returns the setting value (as int) associated with the first setting key. If it does not exists,
* returns the default value provided.
*/
Integer getAsInt(String[] settings, Integer defaultValue) throws SettingsException;
/**
* Returns the setting value (as long) associated with the setting key. If it does not exists,
* returns the default value provided.
*/
Long getAsLong(String setting, Long defaultValue) throws SettingsException;
/**
* Returns the setting value (as long) associated with the setting key. If it does not exists,
* returns the default value provided.
*/
Long getAsLong(String[] settings, Long defaultValue) throws SettingsException;
/**
* Returns the setting value (as boolean) associated with the setting key. If it does not exists,
* returns the default value provided.
*/
Boolean getAsBoolean(String setting, Boolean defaultValue) throws SettingsException;
/**
* Returns the setting value (as boolean) associated with the setting key. If it does not exists,
* returns the default value provided.
*/
Boolean getAsBoolean(String[] settings, Boolean defaultValue) throws SettingsException;
/**
* Returns the setting value (as time) associated with the setting key. If it does not exists,
* returns the default value provided.
*/
TimeValue getAsTime(String setting, TimeValue defaultValue) throws SettingsException;
/**
* Returns the setting value (as time) associated with the setting key. If it does not exists,
* returns the default value provided.
*/
TimeValue getAsTime(String[] settings, TimeValue defaultValue) throws SettingsException;
/**
* Returns the setting value (as size) associated with the setting key. If it does not exists,
* returns the default value provided.
*/
ByteSizeValue getAsBytesSize(String setting, ByteSizeValue defaultValue) throws SettingsException;
/**
* Returns the setting value (as size) associated with the setting key. If it does not exists,
* returns the default value provided.
*/
ByteSizeValue getAsBytesSize(String[] settings, ByteSizeValue defaultValue) throws SettingsException;
/**
* Returns the setting value (as size) associated with the setting key. If it does not exists,
* returns the default value provided.
*/
SizeValue getAsSize(String setting, SizeValue defaultValue) throws SettingsException;
/**
* Returns the setting value (as size) associated with the setting key. If it does not exists,
* returns the default value provided.
*/
SizeValue getAsSize(String[] settings, SizeValue defaultValue) throws SettingsException;
/**
* Returns the setting value (as a class) associated with the setting key. If it does not exists,
* returns the default class provided.
*
* @param setting The setting key
* @param defaultClazz The class to return if no value is associated with the setting
* @param The type of the class
* @return The class setting value, or the default class provided is no value exists
* @throws NoClassSettingsException Failure to load a class
*/
Class getAsClass(String setting, Class defaultClazz) throws NoClassSettingsException;
/**
* Returns the setting value (as a class) associated with the setting key. If the value itself fails to
* represent a loadable class, the value will be appended to the prefixPackage and suffixed with the
* suffixClassName and it will try to be loaded with it.
*
* @param setting The setting key
* @param defaultClazz The class to return if no value is associated with the setting
* @param prefixPackage The prefix package to prefix the value with if failing to load the class as is
* @param suffixClassName The suffix class name to prefix the value with if failing to load the class as is
* @param The type of the class
* @return The class represented by the setting value, or the default class provided if no value exists
* @throws NoClassSettingsException Failure to load the class
*/
Class getAsClass(String setting, Class defaultClazz, String prefixPackage, String suffixClassName) throws NoClassSettingsException;
/**
* The values associated with a setting prefix as an array. The settings array is in the format of:
* settingPrefix.[index].
*
* It will also automatically load a comma separated list under the settingPrefix and merge with
* the numbered format.
*
* @param settingPrefix The setting prefix to load the array by
* @return The setting array values
* @throws SettingsException
*/
String[] getAsArray(String settingPrefix, String[] defaultArray) throws SettingsException;
/**
* The values associated with a setting prefix as an array. The settings array is in the format of:
* settingPrefix.[index].
*
* It will also automatically load a comma separated list under the settingPrefix and merge with
* the numbered format.
*
* @param settingPrefix The setting prefix to load the array by
* @return The setting array values
* @throws SettingsException
*/
String[] getAsArray(String settingPrefix) throws SettingsException;
/**
* Retruns a parsed version.
*/
Version getAsVersion(String setting, Version defaultVersion) throws SettingsException;
/**
* Returns the settings as delimited string.
*/
String toDelimitedString(char delimiter);
/**
* A settings builder interface.
*/
interface Builder {
/**
* Builds the settings.
*/
Settings build();
}
}