| /* |
| * 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.livy.client.common; |
| |
| import java.util.*; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.concurrent.TimeUnit; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.livy.annotations.Private; |
| |
| /** |
| * Base class with common functionality for type-safe configuration objects. |
| */ |
| @Private |
| public abstract class ClientConf<T extends ClientConf> |
| implements Iterable<Map.Entry<String, String>> { |
| |
| protected Logger LOG = LoggerFactory.getLogger(getClass()); |
| |
| public static interface ConfEntry { |
| |
| /** |
| * @return The key in the configuration file. |
| */ |
| String key(); |
| |
| /** |
| * @return The default value, which also defines the type of the config. Supported types: |
| * Boolean, Integer, Long, String. <code>null</code> maps to String. |
| */ |
| Object dflt(); |
| |
| } |
| |
| private static final Map<String, TimeUnit> TIME_SUFFIXES; |
| |
| public static final boolean TEST_MODE = Boolean.parseBoolean(System.getenv("LIVY_TEST")); |
| |
| static { |
| TIME_SUFFIXES = new HashMap<>(); |
| TIME_SUFFIXES.put("us", TimeUnit.MICROSECONDS); |
| TIME_SUFFIXES.put("ms", TimeUnit.MILLISECONDS); |
| TIME_SUFFIXES.put("s", TimeUnit.SECONDS); |
| TIME_SUFFIXES.put("m", TimeUnit.MINUTES); |
| TIME_SUFFIXES.put("min", TimeUnit.MINUTES); |
| TIME_SUFFIXES.put("h", TimeUnit.HOURS); |
| TIME_SUFFIXES.put("d", TimeUnit.DAYS); |
| } |
| |
| protected final ConcurrentMap<String, String> config; |
| |
| protected ClientConf(Properties config) { |
| this.config = new ConcurrentHashMap<>(); |
| if (config != null) { |
| for (String key : config.stringPropertyNames()) { |
| logDeprecationWarning(key); |
| this.config.put(key, config.getProperty(key)); |
| } |
| } |
| } |
| |
| public String get(String key) { |
| String val = config.get(key); |
| if (val != null) { |
| return val; |
| } |
| DeprecatedConf depConf = getConfigsWithAlternatives().get(key); |
| if (depConf != null) { |
| return config.get(depConf.key()); |
| } else { |
| return val; |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| public T set(String key, String value) { |
| logDeprecationWarning(key); |
| config.put(key, value); |
| return (T) this; |
| } |
| |
| @SuppressWarnings("unchecked") |
| public T setIfMissing(String key, String value) { |
| if (config.putIfAbsent(key, value) == null) { |
| logDeprecationWarning(key); |
| } |
| return (T) this; |
| } |
| |
| @SuppressWarnings("unchecked") |
| public T setAll(ClientConf<?> other) { |
| for (Map.Entry<String, String> e : other) { |
| set(e.getKey(), e.getValue()); |
| } |
| return (T) this; |
| } |
| |
| public String get(ConfEntry e) { |
| Object value = get(e, String.class); |
| return (String) (value != null ? value : e.dflt()); |
| } |
| |
| public boolean getBoolean(ConfEntry e) { |
| String val = get(e, Boolean.class); |
| if (val != null) { |
| return Boolean.parseBoolean(val); |
| } else { |
| return (Boolean) e.dflt(); |
| } |
| } |
| |
| public int getInt(ConfEntry e) { |
| String val = get(e, Integer.class); |
| if (val != null) { |
| return Integer.parseInt(val); |
| } else { |
| return (Integer) e.dflt(); |
| } |
| } |
| |
| public long getLong(ConfEntry e) { |
| String val = get(e, Long.class); |
| if (val != null) { |
| return Long.parseLong(val); |
| } else { |
| return (Long) e.dflt(); |
| } |
| } |
| |
| public long getTimeAsMs(ConfEntry e) { |
| String time = get(e, String.class); |
| if (time == null) { |
| check(e.dflt() != null, |
| "ConfEntry %s doesn't have a default value, cannot convert to time value.", e.key()); |
| time = (String) e.dflt(); |
| } |
| |
| Matcher m = Pattern.compile("(-?[0-9]+)([a-z]+)?").matcher(time.toLowerCase()); |
| if (!m.matches()) { |
| throw new IllegalArgumentException("Invalid time string: " + time); |
| } |
| |
| long val = Long.parseLong(m.group(1)); |
| String suffix = m.group(2); |
| |
| if (suffix != null && !TIME_SUFFIXES.containsKey(suffix)) { |
| throw new IllegalArgumentException("Invalid suffix: \"" + suffix + "\""); |
| } |
| |
| return TimeUnit.MILLISECONDS.convert(val, |
| suffix != null ? TIME_SUFFIXES.get(suffix) : TimeUnit.MILLISECONDS); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public T set(ConfEntry e, Object value) { |
| check(typesMatch(value, e.dflt()), "Value doesn't match configuration entry type for %s.", |
| e.key()); |
| if (value == null) { |
| config.remove(e.key()); |
| } else { |
| logDeprecationWarning(e.key()); |
| config.put(e.key(), value.toString()); |
| } |
| return (T) this; |
| } |
| |
| @Override |
| public Iterator<Map.Entry<String, String>> iterator() { |
| return config.entrySet().iterator(); |
| } |
| |
| private String get(ConfEntry e, Class<?> requestedType) { |
| check(getType(e.dflt()).equals(requestedType), "Invalid type conversion requested for %s.", |
| e.key()); |
| return this.get(e.key()); |
| } |
| |
| private boolean typesMatch(Object test, Object expected) { |
| return test == null || getType(test).equals(getType(expected)); |
| } |
| |
| private Class<?> getType(Object o) { |
| return (o != null) ? o.getClass() : String.class; |
| } |
| |
| private void check(boolean test, String message, Object... args) { |
| if (!test) { |
| throw new IllegalArgumentException(String.format(message, args)); |
| } |
| } |
| |
| /** Logs a warning message if the given config key is deprecated. */ |
| private void logDeprecationWarning(String key) { |
| ConfPair altConf = allAlternativeKeys().get(key); |
| if (altConf != null) { |
| LOG.warn("The configuration key " + key + " has been deprecated as of Livy " |
| + altConf.depConf.version() + " and may be removed in the future. Please use the new key " |
| + altConf.newKey + " instead."); |
| return; |
| } |
| |
| DeprecatedConf depConfs = getDeprecatedConfigs().get(key); |
| if (depConfs != null) { |
| LOG.warn("The configuration key " + depConfs.key() + " has been deprecated as of Livy " |
| + depConfs.version() + " and may be removed in the future. " |
| + depConfs.deprecationMessage()); |
| } |
| } |
| |
| /** |
| * @return A Map from a valid key to a DeprecatedConf with the deprecated key. |
| */ |
| protected abstract Map<String, DeprecatedConf> getConfigsWithAlternatives(); |
| |
| /** |
| * @return A Map from a deprecated key to a DeprecatedConf with the same key. |
| */ |
| protected abstract Map<String, DeprecatedConf> getDeprecatedConfigs(); |
| |
| private static class ConfPair { |
| final String newKey; |
| final DeprecatedConf depConf; |
| |
| ConfPair(String key, DeprecatedConf conf) { |
| this.newKey = key; |
| this.depConf = conf; |
| } |
| } |
| private volatile Map<String, ConfPair> altToNewKeyMap = null; |
| |
| private Map<String, ConfPair> allAlternativeKeys() { |
| if (altToNewKeyMap == null) { |
| synchronized (this) { |
| if (altToNewKeyMap == null) { |
| Map<String, ConfPair> configs = new HashMap<>(); |
| for (String e : getConfigsWithAlternatives().keySet()) { |
| DeprecatedConf depConf = getConfigsWithAlternatives().get(e); |
| configs.put(depConf.key(), new ConfPair(e, depConf)); |
| } |
| altToNewKeyMap = Collections.unmodifiableMap(configs); |
| } |
| } |
| } |
| return altToNewKeyMap; |
| } |
| |
| public static interface DeprecatedConf { |
| |
| /** |
| * @return The key in the configuration file. |
| */ |
| String key(); |
| |
| /** |
| * @return The Livy version in which the key was deprecated. |
| */ |
| String version(); |
| |
| /** |
| * @return Message to include in the deprecation warning for configs without alternatives |
| */ |
| String deprecationMessage(); |
| } |
| |
| } |