| /* |
| * 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.hadoop.fs.swift.http; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.swift.exceptions.SwiftConfigurationException; |
| |
| import java.net.URI; |
| import java.util.Properties; |
| |
| import static org.apache.hadoop.fs.swift.http.SwiftProtocolConstants.*; |
| |
| /** |
| * This class implements the binding logic between Hadoop configurations |
| * and the swift rest client. |
| * <p> |
| * The swift rest client takes a Properties instance containing |
| * the string values it uses to bind to a swift endpoint. |
| * <p> |
| * This class extracts the values for a specific filesystem endpoint |
| * and then builds an appropriate Properties file. |
| */ |
| public final class RestClientBindings { |
| private static final Log LOG = LogFactory.getLog(RestClientBindings.class); |
| |
| public static final String E_INVALID_NAME = "Invalid swift hostname '%s':" + |
| " hostname must in form container.service"; |
| |
| /** |
| * Public for testing : build the full prefix for use in resolving |
| * configuration items |
| * |
| * @param service service to use |
| * @return the prefix string <i>without any trailing "."</i> |
| */ |
| public static String buildSwiftInstancePrefix(String service) { |
| return SWIFT_SERVICE_PREFIX + service; |
| } |
| |
| /** |
| * Raise an exception for an invalid service name |
| * |
| * @param hostname hostname that was being parsed |
| * @return an exception to throw |
| */ |
| private static SwiftConfigurationException invalidName(String hostname) { |
| return new SwiftConfigurationException( |
| String.format(E_INVALID_NAME, hostname)); |
| } |
| |
| /** |
| * Get the container name from the hostname -the single element before the |
| * first "." in the hostname |
| * |
| * @param hostname hostname to split |
| * @return the container |
| * @throws SwiftConfigurationException |
| */ |
| public static String extractContainerName(String hostname) throws |
| SwiftConfigurationException { |
| int i = hostname.indexOf("."); |
| if (i <= 0) { |
| throw invalidName(hostname); |
| } |
| return hostname.substring(0, i); |
| } |
| |
| public static String extractContainerName(URI uri) throws |
| SwiftConfigurationException { |
| return extractContainerName(uri.getHost()); |
| } |
| |
| /** |
| * Get the service name from a longer hostname string |
| * |
| * @param hostname hostname |
| * @return the separated out service name |
| * @throws SwiftConfigurationException if the hostname was invalid |
| */ |
| public static String extractServiceName(String hostname) throws |
| SwiftConfigurationException { |
| int i = hostname.indexOf("."); |
| if (i <= 0) { |
| throw invalidName(hostname); |
| } |
| String service = hostname.substring(i + 1); |
| if (service.isEmpty() || service.contains(".")) { |
| //empty service contains dots in -not currently supported |
| throw invalidName(hostname); |
| } |
| return service; |
| } |
| |
| public static String extractServiceName(URI uri) throws |
| SwiftConfigurationException { |
| return extractServiceName(uri.getHost()); |
| } |
| |
| /** |
| * Build a properties instance bound to the configuration file -using |
| * the filesystem URI as the source of the information. |
| * |
| * @param fsURI filesystem URI |
| * @param conf configuration |
| * @return a properties file with the instance-specific properties extracted |
| * and bound to the swift client properties. |
| * @throws SwiftConfigurationException if the configuration is invalid |
| */ |
| public static Properties bind(URI fsURI, Configuration conf) throws |
| SwiftConfigurationException { |
| String host = fsURI.getHost(); |
| if (host == null || host.isEmpty()) { |
| //expect shortnames -> conf names |
| throw invalidName(host); |
| } |
| |
| String container = extractContainerName(host); |
| String service = extractServiceName(host); |
| |
| //build filename schema |
| String prefix = buildSwiftInstancePrefix(service); |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Filesystem " + fsURI |
| + " is using configuration keys " + prefix); |
| } |
| Properties props = new Properties(); |
| props.setProperty(SWIFT_SERVICE_PROPERTY, service); |
| props.setProperty(SWIFT_CONTAINER_PROPERTY, container); |
| copy(conf, prefix + DOT_AUTH_URL, props, SWIFT_AUTH_PROPERTY, true); |
| copy(conf, prefix + DOT_USERNAME, props, SWIFT_USERNAME_PROPERTY, true); |
| copy(conf, prefix + DOT_APIKEY, props, SWIFT_APIKEY_PROPERTY, false); |
| copy(conf, prefix + DOT_PASSWORD, props, SWIFT_PASSWORD_PROPERTY, |
| props.contains(SWIFT_APIKEY_PROPERTY) ? true : false); |
| copy(conf, prefix + DOT_TENANT, props, SWIFT_TENANT_PROPERTY, false); |
| copy(conf, prefix + DOT_REGION, props, SWIFT_REGION_PROPERTY, false); |
| copy(conf, prefix + DOT_HTTP_PORT, props, SWIFT_HTTP_PORT_PROPERTY, false); |
| copy(conf, prefix + |
| DOT_HTTPS_PORT, props, SWIFT_HTTPS_PORT_PROPERTY, false); |
| |
| copyBool(conf, prefix + DOT_PUBLIC, props, SWIFT_PUBLIC_PROPERTY, false); |
| copyBool(conf, prefix + DOT_LOCATION_AWARE, props, |
| SWIFT_LOCATION_AWARE_PROPERTY, false); |
| |
| return props; |
| } |
| |
| /** |
| * Extract a boolean value from the configuration and copy it to the |
| * properties instance. |
| * @param conf source configuration |
| * @param confKey key in the configuration file |
| * @param props destination property set |
| * @param propsKey key in the property set |
| * @param defVal default value |
| */ |
| private static void copyBool(Configuration conf, |
| String confKey, |
| Properties props, |
| String propsKey, |
| boolean defVal) { |
| boolean b = conf.getBoolean(confKey, defVal); |
| props.setProperty(propsKey, Boolean.toString(b)); |
| } |
| |
| private static void set(Properties props, String key, String optVal) { |
| if (optVal != null) { |
| props.setProperty(key, optVal); |
| } |
| } |
| |
| /** |
| * Copy a (trimmed) property from the configuration file to the properties file. |
| * <p> |
| * If marked as required and not found in the configuration, an |
| * exception is raised. |
| * If not required -and missing- then the property will not be set. |
| * In this case, if the property is already in the Properties instance, |
| * it will remain untouched. |
| * |
| * @param conf source configuration |
| * @param confKey key in the configuration file |
| * @param props destination property set |
| * @param propsKey key in the property set |
| * @param required is the property required |
| * @throws SwiftConfigurationException if the property is required but was |
| * not found in the configuration instance. |
| */ |
| public static void copy(Configuration conf, String confKey, Properties props, |
| String propsKey, |
| boolean required) throws SwiftConfigurationException { |
| //TODO: replace. version compatibility issue conf.getTrimmed fails with NoSuchMethodError |
| String val = conf.get(confKey); |
| if (val != null) { |
| val = val.trim(); |
| } |
| if (required && val == null) { |
| throw new SwiftConfigurationException( |
| "Missing mandatory configuration option: " |
| + |
| confKey); |
| } |
| set(props, propsKey, val); |
| } |
| |
| |
| } |