com.netflix.spinnaker.halyard.deploy.config.v1.ConfigParser.java Source code

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Here is the source code for com.netflix.spinnaker.halyard.deploy.config.v1.ConfigParser.java

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/*
 * Copyright 2017 Google, Inc.
 *
 * 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 com.netflix.spinnaker.halyard.deploy.config.v1;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.netflix.spinnaker.halyard.core.AtomicFileWriter;
import com.netflix.spinnaker.halyard.core.error.v1.HalException;
import com.netflix.spinnaker.halyard.core.problem.v1.Problem;
import com.netflix.spinnaker.halyard.core.problem.v1.ProblemBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.yaml.snakeyaml.Yaml;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Path;
import java.util.Map;

@Component
public class ConfigParser {
    @Autowired
    private Yaml yamlParser;

    @Autowired
    private ObjectMapper objectMapper;

    public String yamlToString(Object yaml) {
        return yamlParser.dump(objectMapper.convertValue(yaml, Map.class));
    }

    public void atomicWrite(Path path, Object obj) {
        String contents = yamlToString(obj);
        AtomicFileWriter writer = null;
        try {
            writer = new AtomicFileWriter(path);
            writer.write(contents);
            writer.commit();
        } catch (IOException ioe) {
            ioe.printStackTrace();
            throw new HalException(new ProblemBuilder(Problem.Severity.FATAL,
                    "Failed to write config for profile " + path.toFile().getName() + ": " + ioe.getMessage())
                            .build());
        } finally {
            if (writer != null) {
                writer.close();
            }
        }
    }

    public <T> T read(Path path, Class<T> tClass) {
        try {
            InputStream is = new FileInputStream(path.toFile());
            Object obj = yamlParser.load(is);
            return objectMapper.convertValue(obj, tClass);
        } catch (IllegalArgumentException e) {
            throw new HalException(new ProblemBuilder(Problem.Severity.FATAL,
                    "Failed to load " + tClass.getSimpleName() + " config: " + e.getMessage()).build());
        } catch (FileNotFoundException e) {
            throw new HalException(new ProblemBuilder(Problem.Severity.FATAL,
                    "Failed to find " + tClass.getSimpleName() + " config: " + e.getMessage()).build());
        }
    }
}