demo.config.diff.ConfigDiffSample.java Source code

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Here is the source code for demo.config.diff.ConfigDiffSample.java

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/*
 * Copyright 2012-2015 the original author or authors.
 *
 * Licensed 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 demo.config.diff;

import java.util.Comparator;

import demo.config.diff.support.AetherDependencyResolver;

import org.springframework.boot.configurationmetadata.ConfigurationMetadataProperty;
import org.springframework.boot.configurationmetadata.ConfigurationMetadataRepository;
import org.springframework.util.StringUtils;

public class ConfigDiffSample {

    private static final String NEW_LINE = System.getProperty("line.separator");

    public static void main(String[] args) throws Exception {
        ConfigDiffResult configDiffResult = new ConfigDiffGenerator(
                AetherDependencyResolver.withAllRepositories(false)).generateDiff("1.3.0.M1", "1.3.0.M3");

        System.out.println(formatDiff(configDiffResult));
    }

    private static String formatDiff(ConfigDiffResult diff) {
        StringBuilder out = new StringBuilder();
        out.append("Configuration properties change between `").append(diff.getLeftVersion()).append("` and `")
                .append(diff.getRightVersion()).append("`").append(NEW_LINE);
        out.append(NEW_LINE);

        diff.getAllGroups().stream().sorted(groupComparator()).forEach(groupDiff -> {
            out.append("Group '").append(groupDiff.getId()).append("'").append(NEW_LINE);
            out.append("===========================================================").append(NEW_LINE);
            for (ConfigPropertyDiff propertyDiff : groupDiff.getAllProperties()) {
                if (propertyDiff.getLeft() == null && propertyDiff.getRight() != null) {
                    appendProperty(out, propertyDiff.getRight(), true).append(NEW_LINE);
                } else if (propertyDiff.getLeft() != null && propertyDiff.getRight() == null) {
                    appendProperty(out, propertyDiff.getLeft(), false).append(NEW_LINE);
                }
            }
            out.append(NEW_LINE);
        });
        return out.toString();
    }

    private static StringBuilder appendProperty(StringBuilder sb, ConfigurationMetadataProperty property,
            boolean add) {
        String symbol = add ? "[+]" : "[-]";
        sb.append(symbol).append(" ").append(property.getId());
        String shortDescription = property.getShortDescription();
        if (StringUtils.hasText(shortDescription)) {
            sb.append(" - ").append(shortDescription);
        }
        return sb;
    }

    private static Comparator<ConfigGroupDiff> groupComparator() {
        return (o1, o2) -> {
            if (ConfigurationMetadataRepository.ROOT_GROUP.equals(o1.getId())) {
                return -1;
            }
            if (ConfigurationMetadataRepository.ROOT_GROUP.equals(o2.getId())) {
                return 1;
            }
            return o1.getId().compareTo(o2.getId());
        };
    }
}