| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.gateway.topology.discovery.ambari; |
| |
| |
| class PropertyEqualsHandler implements ConditionalValueHandler { |
| |
| private String serviceName = null; |
| private String propertyName = null; |
| private String propertyValue = null; |
| private ConditionalValueHandler affirmativeResult = null; |
| private ConditionalValueHandler negativeResult = null; |
| |
| PropertyEqualsHandler(String serviceName, |
| String propertyName, |
| String propertyValue, |
| ConditionalValueHandler affirmativeResult, |
| ConditionalValueHandler negativeResult) { |
| this.serviceName = serviceName; |
| this.propertyName = propertyName; |
| this.propertyValue = propertyValue; |
| this.affirmativeResult = affirmativeResult; |
| this.negativeResult = negativeResult; |
| } |
| |
| @Override |
| public String evaluate(ServiceURLPropertyConfig config, AmbariCluster cluster) { |
| String result = null; |
| |
| ServiceURLPropertyConfig.Property p = config.getConfigProperty(serviceName, propertyName); |
| if (p != null) { |
| String value = getActualPropertyValue(cluster, p); |
| if (propertyValue == null) { |
| // If the property value isn't specified, then we're just checking if the property is set with any value |
| if (value != null) { |
| // So, if there is a value in the config, respond with the affirmative |
| result = affirmativeResult.evaluate(config, cluster); |
| } else if (negativeResult != null) { |
| result = negativeResult.evaluate(config, cluster); |
| } |
| } |
| |
| if (result == null) { |
| if (propertyValue.equals(value)) { |
| result = affirmativeResult.evaluate(config, cluster); |
| } else if (negativeResult != null) { |
| result = negativeResult.evaluate(config, cluster); |
| } |
| } |
| |
| // Check if the result is a reference to a local derived property |
| ServiceURLPropertyConfig.Property derived = config.getConfigProperty(serviceName, result); |
| if (derived != null) { |
| result = getActualPropertyValue(cluster, derived); |
| } |
| } |
| |
| return result; |
| } |
| |
| private String getActualPropertyValue(AmbariCluster cluster, ServiceURLPropertyConfig.Property property) { |
| String value = null; |
| String propertyType = property.getType(); |
| if (ServiceURLPropertyConfig.Property.TYPE_COMPONENT.equals(propertyType)) { |
| AmbariComponent component = cluster.getComponent(property.getComponent()); |
| if (component != null) { |
| value = component.getConfigProperty(property.getValue()); |
| } |
| } else if (ServiceURLPropertyConfig.Property.TYPE_SERVICE.equals(propertyType)) { |
| value = cluster.getServiceConfiguration(property.getService(), property.getServiceConfig()).getProperties().get(property.getValue()); |
| } |
| return value; |
| } |
| } |