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/*
* Copyright © 2016-2018 European Support Limited
*
* 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 org.onap.config.impl;
import static org.onap.config.Constants.LOAD_ORDER_KEY;
import java.io.File;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import org.apache.commons.configuration2.CombinedConfiguration;
import org.apache.commons.configuration2.Configuration;
import org.apache.commons.configuration2.tree.MergeCombiner;
import org.apache.commons.configuration2.tree.OverrideCombiner;
import org.apache.commons.configuration2.tree.UnionCombiner;
import org.onap.config.ConfigurationUtils;
import org.onap.config.type.ConfigurationMode;
public final class AggregateConfiguration {
private final Map<String, Configuration> rootConfig = Collections.synchronizedMap(new HashMap<>());
private final Map<String, Configuration> unionConfig = Collections.synchronizedMap(new HashMap<>());
private final Map<String, Configuration> mergeConfig = Collections.synchronizedMap(new HashMap<>());
private final Map<String, Configuration> overrideConfig = Collections.synchronizedMap(new LinkedHashMap<>());
public void addConfig(File file) throws Exception {
addConfig(file.getAbsolutePath().toUpperCase(), ConfigurationUtils.getMergeStrategy(file),
ConfigurationUtils.getConfigurationBuilder(file, false).getConfiguration());
}
private void addConfig(String path, ConfigurationMode configMode, Configuration config) {
if (configMode != null) {
switch (configMode) {
case MERGE:
mergeConfig.put(path, config);
break;
case OVERRIDE:
overrideConfig.put(path, config);
break;
case UNION:
unionConfig.put(path, config);
break;
default:
}
} else {
rootConfig.put(path, config);
}
}
public void addConfig(URL url) throws Exception {
addConfig(url.getFile().toUpperCase(), ConfigurationUtils.getMergeStrategy(url),
ConfigurationUtils.getConfigurationBuilder(url).getConfiguration());
}
public void removeConfig(File file) {
String key = file.getAbsolutePath().toUpperCase();
if (rootConfig.containsKey(key)) {
rootConfig.remove(key);
} else if (mergeConfig.containsKey(key)) {
mergeConfig.remove(key);
} else if (unionConfig.containsKey(key)) {
unionConfig.remove(key);
} else if (overrideConfig.containsKey(key)) {
overrideConfig.remove(key);
}
}
public boolean containsConfig(File file) {
String key = file.getAbsolutePath().toUpperCase();
return rootConfig.containsKey(key) || mergeConfig.containsKey(key) || unionConfig.containsKey(key)
|| overrideConfig.containsKey(key);
}
public Configuration getFinalConfiguration() {
CombinedConfiguration ccRoot = new CombinedConfiguration(new MergeCombiner());
ArrayList<Configuration> tempList = new ArrayList<>(rootConfig.values());
tempList.sort(this::sortForMerge);
for (Configuration conf : tempList) {
ccRoot.addConfiguration(conf);
}
CombinedConfiguration ccMergeRoot = new CombinedConfiguration(new MergeCombiner());
ccMergeRoot.addConfiguration(ccRoot);
tempList = new ArrayList<>(mergeConfig.values());
tempList.sort(this::sortForMerge);
for (Configuration conf : tempList) {
ccMergeRoot.addConfiguration(conf);
}
CombinedConfiguration ccUnionRoot = new CombinedConfiguration(new UnionCombiner());
ccUnionRoot.addConfiguration(ccMergeRoot);
for (Configuration conf : unionConfig.values()) {
ccUnionRoot.addConfiguration(conf);
}
ArrayList<Configuration> tempOverrideConfigs = new ArrayList<>(overrideConfig.values());
Collections.reverse(tempOverrideConfigs);
tempOverrideConfigs.sort(this::sortForOverride);
CombinedConfiguration ccOverrideRoot = new CombinedConfiguration(new OverrideCombiner());
for (Configuration conf : tempOverrideConfigs) {
ccOverrideRoot.addConfiguration(conf);
}
ccOverrideRoot.addConfiguration(ccUnionRoot);
return ccOverrideRoot;
}
private int sortForOverride(Configuration conf1, Configuration conf2) {
String order1 = conf1.getString(LOAD_ORDER_KEY);
String order2 = conf2.getString(LOAD_ORDER_KEY);
if (ConfigurationUtils.isBlank(order1) || !order1.trim().matches("\\d+")) {
order1 = "0";
}
if (ConfigurationUtils.isBlank(order2) || !order2.trim().matches("\\d+")) {
order2 = "0";
}
return Integer.parseInt(order2.trim()) - Integer.parseInt(order1.trim());
}
private int sortForMerge(Configuration conf1, Configuration conf2) {
String order1 = conf1.getString(LOAD_ORDER_KEY);
String order2 = conf2.getString(LOAD_ORDER_KEY);
if (ConfigurationUtils.isBlank(order1) || !order1.trim().matches("\\d+")) {
order1 = "0";
}
if (ConfigurationUtils.isBlank(order2) || !order2.trim().matches("\\d+")) {
order2 = "0";
}
return Integer.parseInt(order1.trim()) - Integer.parseInt(order2.trim());
}
}
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