| /* |
| * 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.cassandra.config; |
| |
| import java.beans.IntrospectionException; |
| import java.io.ByteArrayInputStream; |
| import java.io.File; |
| import java.io.InputStream; |
| import java.io.IOException; |
| import java.net.URL; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Maps; |
| import com.google.common.collect.Sets; |
| import com.google.common.io.ByteStreams; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.cassandra.exceptions.ConfigurationException; |
| import org.yaml.snakeyaml.TypeDescription; |
| import org.yaml.snakeyaml.Yaml; |
| import org.yaml.snakeyaml.constructor.Constructor; |
| import org.yaml.snakeyaml.error.YAMLException; |
| import org.yaml.snakeyaml.introspector.MissingProperty; |
| import org.yaml.snakeyaml.introspector.Property; |
| import org.yaml.snakeyaml.introspector.PropertyUtils; |
| |
| public class YamlConfigurationLoader implements ConfigurationLoader |
| { |
| private static final Logger logger = LoggerFactory.getLogger(YamlConfigurationLoader.class); |
| |
| private final static String DEFAULT_CONFIGURATION = "cassandra.yaml"; |
| |
| /** |
| * Inspect the classpath to find storage configuration file |
| */ |
| private static URL getStorageConfigURL() throws ConfigurationException |
| { |
| String configUrl = System.getProperty("cassandra.config"); |
| if (configUrl == null) |
| configUrl = DEFAULT_CONFIGURATION; |
| |
| URL url; |
| try |
| { |
| url = new URL(configUrl); |
| url.openStream().close(); // catches well-formed but bogus URLs |
| } |
| catch (Exception e) |
| { |
| ClassLoader loader = DatabaseDescriptor.class.getClassLoader(); |
| url = loader.getResource(configUrl); |
| if (url == null) |
| { |
| String required = "file:" + File.separator + File.separator; |
| if (!configUrl.startsWith(required)) |
| throw new ConfigurationException(String.format( |
| "Expecting URI in variable: [cassandra.config]. Found[%s]. Please prefix the file with [%s%s] for local " + |
| "files and [%s<server>%s] for remote files. If you are executing this from an external tool, it needs " + |
| "to set Config.setClientMode(true) to avoid loading configuration.", |
| configUrl, required, File.separator, required, File.separator)); |
| throw new ConfigurationException("Cannot locate " + configUrl + ". If this is a local file, please confirm you've provided " + required + File.separator + " as a URI prefix."); |
| } |
| } |
| |
| logger.info("Configuration location: {}", url); |
| |
| return url; |
| } |
| |
| private static final URL storageConfigURL = getStorageConfigURL(); |
| |
| @Override |
| public Config loadConfig() throws ConfigurationException |
| { |
| return loadConfig(storageConfigURL); |
| } |
| |
| public Config loadConfig(URL url) throws ConfigurationException |
| { |
| try |
| { |
| logger.debug("Loading settings from {}", url); |
| byte[] configBytes; |
| try (InputStream is = url.openStream()) |
| { |
| configBytes = ByteStreams.toByteArray(is); |
| } |
| catch (IOException e) |
| { |
| // getStorageConfigURL should have ruled this out |
| throw new AssertionError(e); |
| } |
| |
| Constructor constructor = new CustomConstructor(Config.class); |
| MissingPropertiesChecker propertiesChecker = new MissingPropertiesChecker(); |
| constructor.setPropertyUtils(propertiesChecker); |
| Yaml yaml = new Yaml(constructor); |
| Config result = yaml.loadAs(new ByteArrayInputStream(configBytes), Config.class); |
| propertiesChecker.check(); |
| return result; |
| } |
| catch (YAMLException e) |
| { |
| throw new ConfigurationException("Invalid yaml: " + url, e); |
| } |
| } |
| |
| static class CustomConstructor extends Constructor |
| { |
| CustomConstructor(Class<?> theRoot) |
| { |
| super(theRoot); |
| |
| TypeDescription seedDesc = new TypeDescription(ParameterizedClass.class); |
| seedDesc.putMapPropertyType("parameters", String.class, String.class); |
| addTypeDescription(seedDesc); |
| } |
| |
| @Override |
| protected List<Object> createDefaultList(int initSize) |
| { |
| return Lists.newCopyOnWriteArrayList(); |
| } |
| |
| @Override |
| protected Map<Object, Object> createDefaultMap() |
| { |
| return Maps.newConcurrentMap(); |
| } |
| |
| @Override |
| protected Set<Object> createDefaultSet(int initSize) |
| { |
| return Sets.newConcurrentHashSet(); |
| } |
| |
| @Override |
| protected Set<Object> createDefaultSet() |
| { |
| return Sets.newConcurrentHashSet(); |
| } |
| } |
| |
| private static class MissingPropertiesChecker extends PropertyUtils |
| { |
| private final Set<String> missingProperties = new HashSet<>(); |
| |
| public MissingPropertiesChecker() |
| { |
| setSkipMissingProperties(true); |
| } |
| |
| @Override |
| public Property getProperty(Class<? extends Object> type, String name) throws IntrospectionException |
| { |
| Property result = super.getProperty(type, name); |
| if (result instanceof MissingProperty) |
| { |
| missingProperties.add(result.getName()); |
| } |
| return result; |
| } |
| |
| public void check() throws ConfigurationException |
| { |
| if (!missingProperties.isEmpty()) |
| { |
| throw new ConfigurationException("Invalid yaml. Please remove properties " + missingProperties + " from your cassandra.yaml"); |
| } |
| } |
| } |
| } |