| /** |
| * 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.pulsar.common.configuration; |
| |
| import static java.util.Objects.requireNonNull; |
| import static org.apache.pulsar.common.util.FieldParser.update; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.lang.reflect.Field; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Modifier; |
| import java.util.Arrays; |
| import java.util.Map; |
| import java.util.Properties; |
| import org.apache.commons.lang.StringUtils; |
| import org.apache.pulsar.broker.ServiceConfiguration; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Loads ServiceConfiguration with properties. |
| * |
| * |
| */ |
| public class PulsarConfigurationLoader { |
| |
| /** |
| * Creates PulsarConfiguration and loads it with populated attribute values loaded from provided property file. |
| * |
| * @param configFile |
| * @throws IOException |
| * @throws IllegalArgumentException |
| */ |
| public static <T extends PulsarConfiguration> T create(String configFile, |
| Class<? extends PulsarConfiguration> clazz) throws IOException, IllegalArgumentException { |
| requireNonNull(configFile); |
| try (InputStream inputStream = new FileInputStream(configFile)) { |
| return create(inputStream, clazz); |
| } |
| } |
| |
| /** |
| * Creates PulsarConfiguration and loads it with populated attribute values loaded from provided inputstream |
| * property file. |
| * |
| * @param inStream |
| * @throws IOException |
| * if an error occurred when reading from the input stream. |
| * @throws IllegalArgumentException |
| * if the input stream contains incorrect value type |
| */ |
| public static <T extends PulsarConfiguration> T create(InputStream inStream, |
| Class<? extends PulsarConfiguration> clazz) throws IOException, IllegalArgumentException { |
| try { |
| requireNonNull(inStream); |
| Properties properties = new Properties(); |
| properties.load(inStream); |
| return (create(properties, clazz)); |
| } finally { |
| if (inStream != null) { |
| inStream.close(); |
| } |
| } |
| } |
| |
| /** |
| * Creates PulsarConfiguration and loads it with populated attribute values from provided Properties object. |
| * |
| * @param properties The properties to populate the attributed from |
| * @throws IOException |
| * @throws IllegalArgumentException |
| */ |
| @SuppressWarnings({ "rawtypes", "unchecked" }) |
| public static <T extends PulsarConfiguration> T create(Properties properties, |
| Class<? extends PulsarConfiguration> clazz) throws IOException, IllegalArgumentException { |
| requireNonNull(properties); |
| T configuration = null; |
| try { |
| configuration = (T) clazz.getDeclaredConstructor().newInstance(); |
| configuration.setProperties(properties); |
| update((Map) properties, configuration); |
| } catch (InstantiationException | IllegalAccessException |
| | NoSuchMethodException | InvocationTargetException e) { |
| throw new IllegalArgumentException("Failed to instantiate " + clazz.getName(), e); |
| } |
| return configuration; |
| } |
| |
| /** |
| * Validates {@link FieldContext} annotation on each field of the class element. If element is annotated required |
| * and value of the element is null or number value is not in a provided (min,max) range then consider as incomplete |
| * object and throws exception with incomplete parameters |
| * |
| * @param obj |
| * @return |
| * @throws IllegalArgumentException |
| * if object is field values are not completed according to {@link FieldContext} constraints. |
| * @throws IllegalAccessException |
| */ |
| public static boolean isComplete(Object obj) throws IllegalArgumentException { |
| requireNonNull(obj); |
| Field[] fields = obj.getClass().getDeclaredFields(); |
| StringBuilder error = new StringBuilder(); |
| for (Field field : fields) { |
| if (field.isAnnotationPresent(FieldContext.class)) { |
| field.setAccessible(true); |
| Object value; |
| |
| try { |
| value = field.get(obj); |
| } catch (IllegalAccessException e) { |
| throw new RuntimeException(e); |
| } |
| |
| if (log.isDebugEnabled()) { |
| log.debug("Validating configuration field '{}' = '{}'", field.getName(), value); |
| } |
| boolean isRequired = field.getAnnotation(FieldContext.class).required(); |
| long minValue = field.getAnnotation(FieldContext.class).minValue(); |
| long maxValue = field.getAnnotation(FieldContext.class).maxValue(); |
| if (isRequired && isEmpty(value)) { |
| error.append(String.format("Required %s is null,", field.getName())); |
| } |
| |
| if (value != null && Number.class.isAssignableFrom(value.getClass())) { |
| long fieldVal = ((Number) value).longValue(); |
| boolean valid = fieldVal >= minValue && fieldVal <= maxValue; |
| if (!valid) { |
| error.append(String.format("%s value %d doesn't fit in given range (%d, %d),", field.getName(), |
| fieldVal, minValue, maxValue)); |
| } |
| } |
| } |
| } |
| if (error.length() > 0) { |
| throw new IllegalArgumentException(error.substring(0, error.length() - 1)); |
| } |
| return true; |
| } |
| |
| private static boolean isEmpty(Object obj) { |
| if (obj == null) { |
| return true; |
| } else if (obj instanceof String) { |
| return StringUtils.isBlank((String) obj); |
| } else { |
| return false; |
| } |
| } |
| |
| /** |
| * Converts a PulsarConfiguration object to a ServiceConfiguration object. |
| * |
| * @param conf |
| * @param ignoreNonExistMember |
| * @return |
| * @throws IllegalArgumentException |
| * if conf has the field whose name is not contained in ServiceConfiguration and ignoreNonExistMember |
| * is false. |
| * @throws RuntimeException |
| */ |
| public static ServiceConfiguration convertFrom(PulsarConfiguration conf, boolean ignoreNonExistMember) |
| throws RuntimeException { |
| try { |
| final ServiceConfiguration convertedConf = ServiceConfiguration.class |
| .getDeclaredConstructor().newInstance(); |
| Field[] confFields = conf.getClass().getDeclaredFields(); |
| Arrays.stream(confFields).forEach(confField -> { |
| try { |
| Field convertedConfField = ServiceConfiguration.class.getDeclaredField(confField.getName()); |
| confField.setAccessible(true); |
| if (!Modifier.isStatic(convertedConfField.getModifiers())) { |
| convertedConfField.setAccessible(true); |
| convertedConfField.set(convertedConf, confField.get(conf)); |
| } |
| } catch (NoSuchFieldException e) { |
| if (!ignoreNonExistMember) { |
| throw new IllegalArgumentException("Exception caused while converting configuration: " |
| + e.getMessage()); |
| } |
| } catch (IllegalAccessException e) { |
| throw new RuntimeException("Exception caused while converting configuration: " + e.getMessage()); |
| } |
| }); |
| return convertedConf; |
| } catch (InstantiationException | IllegalAccessException |
| | InvocationTargetException | NoSuchMethodException e) { |
| throw new RuntimeException("Exception caused while converting configuration: " + e.getMessage()); |
| } |
| } |
| |
| public static ServiceConfiguration convertFrom(PulsarConfiguration conf) throws RuntimeException { |
| return convertFrom(conf, true); |
| } |
| |
| private static final Logger log = LoggerFactory.getLogger(PulsarConfigurationLoader.class); |
| } |