org.elasticsearch.common.settings.ImmutableSettings 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 com.google.common.collect.Lists;
import org.elasticsearch.Version;
import org.elasticsearch.common.Booleans;
import org.elasticsearch.common.Classes;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.io.Streams;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.property.PropertyPlaceholder;
import org.elasticsearch.common.settings.loader.SettingsLoader;
import org.elasticsearch.common.settings.loader.SettingsLoaderFactory;
import org.elasticsearch.common.unit.ByteSizeUnit;
import org.elasticsearch.common.unit.ByteSizeValue;
import org.elasticsearch.common.unit.SizeValue;
import org.elasticsearch.common.unit.TimeValue;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.*;
import java.util.concurrent.TimeUnit;
import static org.elasticsearch.common.Strings.toCamelCase;
import static org.elasticsearch.common.unit.ByteSizeValue.parseBytesSizeValue;
import static org.elasticsearch.common.unit.SizeValue.parseSizeValue;
import static org.elasticsearch.common.unit.TimeValue.parseTimeValue;
/**
* An immutable implementation of {@link Settings}.
*/
public class ImmutableSettings implements Settings {
private ImmutableMap settings;
private transient ClassLoader classLoader;
private ImmutableSettings(Map settings, ClassLoader classLoader) {
this.settings = ImmutableMap.copyOf(settings);
this.classLoader = classLoader;
}
@Override
public ClassLoader getClassLoader() {
return this.classLoader == null ? Classes.getDefaultClassLoader() : classLoader;
}
@Override
public ClassLoader getClassLoaderIfSet() {
return this.classLoader;
}
@Override
public ImmutableMap getAsMap() {
return this.settings;
}
@Override
public Settings getComponentSettings(Class component) {
if (component.getName().startsWith("org.elasticsearch")) {
return getComponentSettings("org.elasticsearch", component);
}
// not starting with org.elasticsearch, just remove the first package part (probably org/net/com)
return getComponentSettings(component.getName().substring(0, component.getName().indexOf('.')), component);
}
@Override
public Settings getComponentSettings(String prefix, Class component) {
String type = component.getName();
if (!type.startsWith(prefix)) {
throw new SettingsException("Component [" + type + "] does not start with prefix [" + prefix + "]");
}
String settingPrefix = type.substring(prefix.length() + 1); // 1 for the '.'
settingPrefix = settingPrefix.substring(0, settingPrefix.length() - component.getSimpleName().length()); // remove the simple class name (keep the dot)
return getByPrefix(settingPrefix);
}
@Override
public Settings getByPrefix(String prefix) {
Builder builder = new Builder();
for (Map.Entry entry : getAsMap().entrySet()) {
if (entry.getKey().startsWith(prefix)) {
if (entry.getKey().length() < prefix.length()) {
// ignore this one
continue;
}
builder.put(entry.getKey().substring(prefix.length()), entry.getValue());
}
}
builder.classLoader(classLoader);
return builder.build();
}
@Override
public String get(String setting) {
String retVal = settings.get(setting);
if (retVal != null) {
return retVal;
}
// try camel case version
return settings.get(toCamelCase(setting));
}
@Override
public String get(String setting, String defaultValue) {
String retVal = settings.get(setting);
return retVal == null ? defaultValue : retVal;
}
@Override
public Float getAsFloat(String setting, Float defaultValue) {
String sValue = get(setting);
if (sValue == null) {
return defaultValue;
}
try {
return Float.parseFloat(sValue);
} catch (NumberFormatException e) {
throw new SettingsException("Failed to parse float setting [" + setting + "] with value [" + sValue + "]", e);
}
}
@Override
public Double getAsDouble(String setting, Double defaultValue) {
String sValue = get(setting);
if (sValue == null) {
return defaultValue;
}
try {
return Double.parseDouble(sValue);
} catch (NumberFormatException e) {
throw new SettingsException("Failed to parse double setting [" + setting + "] with value [" + sValue + "]", e);
}
}
@Override
public Integer getAsInt(String setting, Integer defaultValue) {
String sValue = get(setting);
if (sValue == null) {
return defaultValue;
}
try {
return Integer.parseInt(sValue);
} catch (NumberFormatException e) {
throw new SettingsException("Failed to parse int setting [" + setting + "] with value [" + sValue + "]", e);
}
}
@Override
public Long getAsLong(String setting, Long defaultValue) {
String sValue = get(setting);
if (sValue == null) {
return defaultValue;
}
try {
return Long.parseLong(sValue);
} catch (NumberFormatException e) {
throw new SettingsException("Failed to parse long setting [" + setting + "] with value [" + sValue + "]", e);
}
}
@Override
public Boolean getAsBoolean(String setting, Boolean defaultValue) {
return Booleans.parseBoolean(get(setting), defaultValue);
}
@Override
public TimeValue getAsTime(String setting, TimeValue defaultValue) {
return parseTimeValue(get(setting), defaultValue);
}
@Override
public ByteSizeValue getAsBytesSize(String setting, ByteSizeValue defaultValue) throws SettingsException {
return parseBytesSizeValue(get(setting), defaultValue);
}
@Override
public SizeValue getAsSize(String setting, SizeValue defaultValue) throws SettingsException {
return parseSizeValue(get(setting), defaultValue);
}
@SuppressWarnings({"unchecked"})
@Override
public Class getAsClass(String setting, Class defaultClazz) throws NoClassSettingsException {
String sValue = get(setting);
if (sValue == null) {
return defaultClazz;
}
try {
return (Class) getClassLoader().loadClass(sValue);
} catch (ClassNotFoundException e) {
throw new NoClassSettingsException("Failed to load class setting [" + setting + "] with value [" + sValue + "]", e);
}
}
@SuppressWarnings({"unchecked"})
@Override
public Class getAsClass(String setting, Class defaultClazz, String prefixPackage, String suffixClassName) throws NoClassSettingsException {
String sValue = get(setting);
if (sValue == null) {
return defaultClazz;
}
String fullClassName = sValue;
try {
return (Class) getClassLoader().loadClass(fullClassName);
} catch (ClassNotFoundException e) {
String prefixValue = prefixPackage;
int packageSeparator = sValue.lastIndexOf('.');
if (packageSeparator > 0) {
prefixValue = sValue.substring(0, packageSeparator + 1);
sValue = sValue.substring(packageSeparator + 1);
}
fullClassName = prefixValue + Strings.capitalize(toCamelCase(sValue)) + suffixClassName;
try {
return (Class) getClassLoader().loadClass(fullClassName);
} catch (ClassNotFoundException e1) {
fullClassName = prefixValue + toCamelCase(sValue).toLowerCase() + "." + Strings.capitalize(toCamelCase(sValue)) + suffixClassName;
try {
return (Class) getClassLoader().loadClass(fullClassName);
} catch (ClassNotFoundException e2) {
throw new NoClassSettingsException("Failed to load class setting [" + setting + "] with value [" + get(setting) + "]", e);
}
}
}
}
@Override
public String[] getAsArray(String settingPrefix) throws SettingsException {
return getAsArray(settingPrefix, Strings.EMPTY_ARRAY);
}
@Override
public String[] getAsArray(String settingPrefix, String[] defaultArray) throws SettingsException {
List result = Lists.newArrayList();
if (get(settingPrefix) != null) {
String[] strings = Strings.splitStringByCommaToArray(get(settingPrefix));
if (strings.length > 0) {
for (String string : strings) {
result.add(string.trim());
}
}
}
int counter = 0;
while (true) {
String value = get(settingPrefix + '.' + (counter++));
if (value == null) {
break;
}
result.add(value.trim());
}
if (result.isEmpty()) {
return defaultArray;
}
return result.toArray(new String[result.size()]);
}
@Override
public Map getGroups(String settingPrefix) throws SettingsException {
if (settingPrefix.charAt(settingPrefix.length() - 1) != '.') {
settingPrefix = settingPrefix + ".";
}
// we don't really care that it might happen twice
Map> map = new LinkedHashMap>();
for (Object o : settings.keySet()) {
String setting = (String) o;
if (setting.startsWith(settingPrefix)) {
String nameValue = setting.substring(settingPrefix.length());
int dotIndex = nameValue.indexOf('.');
if (dotIndex == -1) {
throw new SettingsException("Failed to get setting group for [" + settingPrefix + "] setting prefix and setting [" + setting + "] because of a missing '.'");
}
String name = nameValue.substring(0, dotIndex);
String value = nameValue.substring(dotIndex + 1);
Map groupSettings = map.get(name);
if (groupSettings == null) {
groupSettings = new LinkedHashMap();
map.put(name, groupSettings);
}
groupSettings.put(value, get(setting));
}
}
Map retVal = new LinkedHashMap();
for (Map.Entry> entry : map.entrySet()) {
retVal.put(entry.getKey(), new ImmutableSettings(Collections.unmodifiableMap(entry.getValue()), classLoader));
}
return Collections.unmodifiableMap(retVal);
}
@Override
public Version getAsVersion(String setting, Version defaultVersion) throws SettingsException {
String sValue = get(setting);
if (sValue == null) {
return defaultVersion;
}
try {
return Version.fromId(Integer.parseInt(sValue));
} catch (Exception e) {
throw new SettingsException("Failed to parse version setting [" + setting + "] with value [" + sValue + "]", e);
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ImmutableSettings that = (ImmutableSettings) o;
if (classLoader != null ? !classLoader.equals(that.classLoader) : that.classLoader != null) return false;
if (settings != null ? !settings.equals(that.settings) : that.settings != null) return false;
return true;
}
@Override
public int hashCode() {
int result = settings != null ? settings.hashCode() : 0;
result = 31 * result + (classLoader != null ? classLoader.hashCode() : 0);
return result;
}
public static Settings readSettingsFromStream(StreamInput in) throws IOException {
Builder builder = new Builder();
int numberOfSettings = in.readVInt();
for (int i = 0; i < numberOfSettings; i++) {
builder.put(in.readUTF(), in.readUTF());
}
return builder.build();
}
public static void writeSettingsToStream(Settings settings, StreamOutput out) throws IOException {
out.writeVInt(settings.getAsMap().size());
for (Map.Entry entry : settings.getAsMap().entrySet()) {
out.writeUTF(entry.getKey());
out.writeUTF(entry.getValue());
}
}
/**
* Returns a builder to be used in order to build settings.
*/
public static Builder settingsBuilder() {
return new Builder();
}
/**
* A builder allowing to put different settings and then {@link #build()} an immutable
* settings implementation. Use {@link ImmutableSettings#settingsBuilder()} in order to
* construct it.
*/
public static class Builder implements Settings.Builder {
public static final Settings EMPTY_SETTINGS = new Builder().build();
private final Map map = new LinkedHashMap();
private ClassLoader classLoader;
private Builder() {
}
public Map internalMap() {
return this.map;
}
/**
* Removes the provided setting.
*/
public String remove(String key) {
return map.remove(key);
}
/**
* Returns a setting value based on the setting key.
*/
public String get(String key) {
String retVal = map.get(key);
if (retVal != null) {
return retVal;
}
// try camel case version
return map.get(toCamelCase(key));
}
/**
* Sets a setting with the provided setting key and value.
*
* @param key The setting key
* @param value The setting value
* @return The builder
*/
public Builder put(String key, String value) {
map.put(key, value);
return this;
}
/**
* Sets a setting with the provided setting key and class as value.
*
* @param key The setting key
* @param clazz The setting class value
* @return The builder
*/
public Builder put(String key, Class clazz) {
map.put(key, clazz.getName());
return this;
}
/**
* Sets the setting with the provided setting key and the boolean value.
*
* @param setting The setting key
* @param value The boolean value
* @return The builder
*/
public Builder put(String setting, boolean value) {
put(setting, String.valueOf(value));
return this;
}
/**
* Sets the setting with the provided setting key and the int value.
*
* @param setting The setting key
* @param value The int value
* @return The builder
*/
public Builder put(String setting, int value) {
put(setting, String.valueOf(value));
return this;
}
public Builder put(String setting, Version version) {
put(setting, version.id);
return this;
}
/**
* Sets the setting with the provided setting key and the long value.
*
* @param setting The setting key
* @param value The long value
* @return The builder
*/
public Builder put(String setting, long value) {
put(setting, String.valueOf(value));
return this;
}
/**
* Sets the setting with the provided setting key and the float value.
*
* @param setting The setting key
* @param value The float value
* @return The builder
*/
public Builder put(String setting, float value) {
put(setting, String.valueOf(value));
return this;
}
/**
* Sets the setting with the provided setting key and the double value.
*
* @param setting The setting key
* @param value The double value
* @return The builder
*/
public Builder put(String setting, double value) {
put(setting, String.valueOf(value));
return this;
}
/**
* Sets the setting with the provided setting key and the time value.
*
* @param setting The setting key
* @param value The time value
* @return The builder
*/
public Builder put(String setting, long value, TimeUnit timeUnit) {
put(setting, timeUnit.toMillis(value));
return this;
}
/**
* Sets the setting with the provided setting key and the size value.
*
* @param setting The setting key
* @param value The size value
* @return The builder
*/
public Builder put(String setting, long value, ByteSizeUnit sizeUnit) {
put(setting, sizeUnit.toBytes(value));
return this;
}
/**
* Sets the setting with the provided setting key and an array of values.
*
* @param setting The setting key
* @param values The values
* @return The builder
*/
public Builder putArray(String setting, String... values) {
remove(setting);
int counter = 0;
while (true) {
String value = map.remove(setting + '.' + (counter++));
if (value == null) {
break;
}
}
for (int i = 0; i < values.length; i++) {
put(setting + "." + i, values[i]);
}
return this;
}
/**
* Sets the setting group.
*/
public Builder put(String settingPrefix, String groupName, String[] settings, String[] values) throws SettingsException {
if (settings.length != values.length) {
throw new SettingsException("The settings length must match the value length");
}
for (int i = 0; i < settings.length; i++) {
if (values[i] == null) {
continue;
}
put(settingPrefix + "." + groupName + "." + settings[i], values[i]);
}
return this;
}
/**
* Sets all the provided settings.
*/
public Builder put(Settings settings) {
map.putAll(settings.getAsMap());
classLoader = settings.getClassLoaderIfSet();
return this;
}
/**
* Sets all the provided settings.
*/
public Builder put(Map settings) {
map.putAll(settings);
return this;
}
/**
* Sets all the provided settings.
*/
public Builder put(Properties properties) {
for (Map.Entry entry : properties.entrySet()) {
map.put((String) entry.getKey(), (String) entry.getValue());
}
return this;
}
/**
* Loads settings from the actual string content that represents them using the
* {@link SettingsLoaderFactory#loaderFromSource(String)}.
*/
public Builder loadFromSource(String source) {
SettingsLoader settingsLoader = SettingsLoaderFactory.loaderFromSource(source);
try {
Map loadedSettings = settingsLoader.load(source);
put(loadedSettings);
} catch (Exception e) {
throw new SettingsException("Failed to load settings from [" + source + "]", e);
}
return this;
}
/**
* Loads settings from a url that represents them using the
* {@link SettingsLoaderFactory#loaderFromSource(String)}.
*/
public Builder loadFromUrl(URL url) throws SettingsException {
try {
return loadFromStream(url.toExternalForm(), url.openStream());
} catch (IOException e) {
throw new SettingsException("Failed to open stream for url [" + url.toExternalForm() + "]", e);
}
}
/**
* Loads settings from a stream that represents them using the
* {@link SettingsLoaderFactory#loaderFromSource(String)}.
*/
public Builder loadFromStream(String resourceName, InputStream is) throws SettingsException {
SettingsLoader settingsLoader = SettingsLoaderFactory.loaderFromResource(resourceName);
try {
Map loadedSettings = settingsLoader.load(Streams.copyToString(new InputStreamReader(is, "UTF-8")));
put(loadedSettings);
} catch (Exception e) {
throw new SettingsException("Failed to load settings from [" + resourceName + "]", e);
}
return this;
}
/**
* Loads settings from classpath that represents them using the
* {@link SettingsLoaderFactory#loaderFromSource(String)}.
*/
public Builder loadFromClasspath(String resourceName) throws SettingsException {
ClassLoader classLoader = this.classLoader;
if (classLoader == null) {
classLoader = Classes.getDefaultClassLoader();
}
InputStream is = classLoader.getResourceAsStream(resourceName);
if (is == null) {
return this;
}
return loadFromStream(resourceName, is);
}
/**
* Sets the class loader associated with the settings built.
*/
public Builder classLoader(ClassLoader classLoader) {
this.classLoader = classLoader;
return this;
}
/**
* Puts all the properties with keys starting with the provided prefix.
*
* @param prefix The prefix to filter proeprty key by
* @param properties The properties to put
* @return The builder
*/
public Builder putProperties(String prefix, Properties properties) {
for (Object key1 : properties.keySet()) {
String key = (String) key1;
String value = properties.getProperty(key);
if (key.startsWith(prefix)) {
map.put(key.substring(prefix.length()), value);
}
}
return this;
}
/**
* Runs across all the settings set on this builder and replaces ${...} elements in the
* each setting value according to the following logic:
*
* First, tries to resolve it against a System property ({@link System#getProperty(String)}), next,
* tries and resolve it against an environment variable ({@link System#getenv(String)}), and last, tries
* and replace it with another setting already set on this builder.
*/
public Builder replacePropertyPlaceholders() {
PropertyPlaceholder propertyPlaceholder = new PropertyPlaceholder("${", "}", false);
PropertyPlaceholder.PlaceholderResolver placeholderResolver = new PropertyPlaceholder.PlaceholderResolver() {
@Override
public String resolvePlaceholder(String placeholderName) {
String value = System.getProperty(placeholderName);
if (value != null) {
return value;
}
value = System.getenv(placeholderName);
if (value != null) {
return value;
}
return map.get(placeholderName);
}
};
for (Map.Entry entry : map.entrySet()) {
map.put(entry.getKey(), propertyPlaceholder.replacePlaceholders(entry.getValue(), placeholderResolver));
}
return this;
}
/**
* Builds a {@link Settings} (underlying uses {@link ImmutableSettings}) based on everything
* set on this builder.
*/
public Settings build() {
return new ImmutableSettings(Collections.unmodifiableMap(map), classLoader);
}
}
}
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