com.webtide.jetty.load.generator.jenkins.AlpnBootVersions.java Source code

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Here is the source code for com.webtide.jetty.load.generator.jenkins.AlpnBootVersions.java

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//
//  ========================================================================
//  Copyright (c) 1995-2016 Webtide LLC, Olivier Lamy
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================

package com.webtide.jetty.load.generator.jenkins;

import org.apache.commons.lang.StringUtils;
import org.dom4j.Document;
import org.dom4j.Node;
import org.dom4j.XPath;
import org.dom4j.io.SAXReader;
import org.dom4j.tree.DefaultElement;

import java.io.InputStream;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Parse jetty pom to get versions mapping jdk vs alpn boot
 */
public class AlpnBootVersions {
    private Map<String, String> jdkVersionAlpnBootVersion;

    private AlpnBootVersions() {
        Map<String, String> map = new HashMap<>();

        try {
            try (InputStream inputStream = this.getClass().getResourceAsStream("/jetty/jetty-project.pom")) {

                SAXReader reader = new SAXReader();
                Document document = reader.read(inputStream);
                Map<String, String> namespaceMap = new HashMap<>();
                namespaceMap.put("mvn", "http://maven.apache.org/POM/4.0.0");
                XPath xpath = document.createXPath("//mvn:profiles/mvn:profile");
                xpath.setNamespaceURIs(namespaceMap);

                List<DefaultElement> nodes = xpath.selectNodes(document);
                for (DefaultElement o : nodes) {
                    if (StringUtils.startsWith((String) o.element("id").getData(), "8u")) {
                        // olamy well a bit fragile way to parse if more than one property...
                        //"//mvn:properties/mvn:alpn.version"
                        // o.selectSingleNode( "//properties/alpn.version" );
                        Node version = o.element("properties").element("alpn.version");
                        //"//mvn:activation/mvn:property/mvn:value"
                        //o.selectSingleNode( "//activation/property/value" );
                        Node javaVersion = o.element("activation").element("property").element("value");

                        map.put(javaVersion.getStringValue(), version.getStringValue());
                    }
                }
            }
        } catch (Exception e) {
            throw new RuntimeException(e.getMessage(), e);
        }

        jdkVersionAlpnBootVersion = Collections.unmodifiableMap(map);
    }

    private static class LazyHolder {
        static final AlpnBootVersions INSTANCE = new AlpnBootVersions();
    }

    public static AlpnBootVersions getInstance() {
        return LazyHolder.INSTANCE;
    }

    public Map<String, String> getJdkVersionAlpnBootVersion() {
        return jdkVersionAlpnBootVersion;
    }
}