common/src/main/java/org/apache/atlas/utils/OnAtlasPropertyCondition.java

/**
 * 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.atlas.utils;

import org.apache.atlas.ApplicationProperties;
import org.apache.atlas.AtlasException;
import org.apache.atlas.annotation.ConditionalOnAtlasProperty;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Condition;
import org.springframework.context.annotation.ConditionContext;
import org.springframework.core.type.AnnotatedTypeMetadata;
import org.springframework.core.type.AnnotationMetadata;

public class OnAtlasPropertyCondition implements Condition {
    private final Logger LOG = LoggerFactory.getLogger(OnAtlasPropertyCondition.class);

    @Override
    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
        boolean matches = false;
        String propertyName = (String) metadata.getAnnotationAttributes(ConditionalOnAtlasProperty.class.getName()).get("property");
        boolean isDefault = (Boolean) metadata.getAnnotationAttributes(ConditionalOnAtlasProperty.class.getName()).get("isDefault");
        if (metadata instanceof AnnotatedTypeMetadata) {
            String className = ((AnnotationMetadata) metadata).getClassName();

            try {
                Configuration configuration = ApplicationProperties.get();
                String configuredProperty = configuration.getString(propertyName);
                if (StringUtils.isNotEmpty(configuredProperty)) {
                    matches = configuredProperty.equals(className);
                } else if (isDefault) matches = true;
            } catch (AtlasException e) {
                LOG.error("Unable to load atlas properties. Dependent bean configuration may fail");
            }
        }
        return matches;
    }
}