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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.dcae.runtime.core.helm;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.io.FileUtils;
import org.onap.dcaegen2.platform.helmchartgenerator.chartbuilder.ChartBuilder;
import org.onap.dcaegen2.platform.helmchartgenerator.distribution.ChartDistributor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.stereotype.Component;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.nio.file.Files;
/**
* Implementation class for Helm Chart Generator Client
*/
@Slf4j
@Component
@ComponentScan(basePackages = "org.onap.dcaegen2.platform.helmchartgenerator")
public class HelmChartGeneratorClientImpl implements HelmChartGeneratorClient {
@Autowired
private final ChartBuilder chartBuilder;
@Autowired
private final ChartDistributor distributor;
@Value("${helm.base.chart.template.location}")
private String templateLocation;
public HelmChartGeneratorClientImpl(ChartBuilder chartBuilder, ChartDistributor distributor) {
this.chartBuilder = chartBuilder;
this.distributor = distributor;
}
/**
* Generate Helm Chart for a component spec
* @param componentSpec component spec as String
* @return packaged helm chart
*/
@Override
public File generateHelmChart(String componentSpec){
try {
return chartBuilder.build(createTempSpecFile(componentSpec),templateLocation,
createTempChartOutputLocation(), "");
} catch (Exception e) {
log.error(e.getMessage(), e);
throw new RuntimeException("Error while generating the helm chart.");
}
}
private String createTempChartOutputLocation() {
try {
return Files.createTempDirectory("chart").toAbsolutePath().toString();
} catch (IOException e) {
log.error(e.getMessage(), e);
throw new RuntimeException("Error creating a temporary chart dir.");
}
}
private String createTempSpecFile(String componentSpec) throws IOException{
File tmpFile = File.createTempFile("spec",".json");
try (FileWriter writer = new FileWriter(tmpFile)) {
writer.write(componentSpec);
}
return tmpFile.getAbsolutePath();
}
/**
* Distributes helm chart to Chart Museum
* @param helmChart packaged chart location
*/
@Override
public void distribute(File helmChart) {
try {
distributor.distribute(helmChart);
}catch (Exception e){
throw e;
} finally {
removeChartLocally(helmChart);
}
}
private void removeChartLocally(File helmChart) {
try {
FileUtils.forceDelete(helmChart);
} catch (IOException e) {
log.warn("Could not delete a temporary helm chart " + helmChart.getName());
}
}
}
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