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94 lines
2.5 KiB
Java
94 lines
2.5 KiB
Java
package org.gcube.smartgears.handlers.container.lifecycle;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.util.HashMap;
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import java.util.Map;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* @author Luca Frosini (ISTI-CNR)
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*/
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public class LinuxDistributionInfo {
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private static final Logger logger = LoggerFactory.getLogger(LinuxDistributionInfo.class);
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public static final String LSB_RELEASE_COMMAND = "lsb_release -a";
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public static final String OS_RELEASE_FILE_PATH = "/etc/os-release";
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protected Map<String, String> info;
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protected Map<String, String> getInfoViaLsbReleaseCommand() throws IOException {
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logger.trace("Going to exec {}", LSB_RELEASE_COMMAND);
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Process process = Runtime.getRuntime().exec(LSB_RELEASE_COMMAND);
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BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
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Map<String, String> map = parseBufferedReader(bufferedReader);
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bufferedReader.close();
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return map;
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}
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private Map<String, String> parseBufferedReader(BufferedReader bufferedReader) throws IOException {
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Map<String, String> map = new HashMap<>();
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String line = "";
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while ((line = bufferedReader.readLine()) != null) {
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String[] nameValue = parseLine(line);
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map.put(nameValue[0], nameValue[1]);
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}
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return map;
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}
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private String[] parseLine(String line) {
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String[] splitted = line.split("=");
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if (splitted.length < 2) {
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splitted = line.split(":");
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}
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String[] ret = new String[2];
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ret[0] = splitted[0].trim();
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ret[1] = splitted[1].trim().replace("\"", "");
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return ret;
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}
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private Map<String, String> getInfoViaFile(File file) throws IOException {
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logger.trace("Going to read file {}", file.getAbsolutePath());
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BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
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Map<String, String> map = parseBufferedReader(bufferedReader);
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bufferedReader.close();
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return map;
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}
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protected Map<String, String> getInfoViaOsReleaseFile() throws IOException {
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File osReleaseFile = new File(OS_RELEASE_FILE_PATH);
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return getInfoViaFile(osReleaseFile);
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}
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private Map<String, String> retriveInfo() {
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try {
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return getInfoViaLsbReleaseCommand();
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} catch (IOException e) {
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}
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try {
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return getInfoViaOsReleaseFile();
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}catch (IOException e) {
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}
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return null;
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}
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public Map<String, String> getInfo() {
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if (info == null) {
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info = retriveInfo();
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}
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return info;
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}
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}
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