org.hornetq.utils.VersionLoader Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* Copyright 2005-2014 Red Hat, Inc.
* Red Hat licenses this file to you 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.hornetq.utils;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLClassLoader;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Properties;
import java.util.StringTokenizer;
import org.hornetq.core.client.HornetQClientLogger;
import org.hornetq.core.version.Version;
import org.hornetq.core.version.impl.VersionImpl;
/**
* This loads the version info in from a version.properties file.
*
* @author Andy Taylor
* @author Clebert Suconic
* @author Jeff Mesnil
*/
public final class VersionLoader
{
public static final String VERSION_PROP_FILE_KEY = "hornetq.version.property.filename";
public static final String DEFAULT_PROP_FILE_NAME = "hornetq-version.properties";
private static String PROP_FILE_NAME;
private static Version[] versions;
static
{
try
{
try
{
PROP_FILE_NAME = AccessController.doPrivileged(new PrivilegedAction()
{
public String run()
{
return System.getProperty(VersionLoader.VERSION_PROP_FILE_KEY);
}
});
}
catch (Throwable e)
{
HornetQClientLogger.LOGGER.warn(e.getMessage(), e);
PROP_FILE_NAME = null;
}
if (PROP_FILE_NAME == null)
{
PROP_FILE_NAME = VersionLoader.DEFAULT_PROP_FILE_NAME;
}
VersionLoader.versions = VersionLoader.load();
}
catch (Throwable e)
{
VersionLoader.versions = null;
HornetQClientLogger.LOGGER.error(e.getMessage(), e);
}
}
public static Version[] getClientVersions()
{
if (VersionLoader.versions == null)
{
throw new RuntimeException(VersionLoader.PROP_FILE_NAME + " is not available");
}
return VersionLoader.versions;
}
public static Version getVersion()
{
if (VersionLoader.versions == null)
{
throw new RuntimeException(VersionLoader.PROP_FILE_NAME + " is not available");
}
return VersionLoader.versions[0];
}
public static String getClasspathString()
{
StringBuffer classpath = new StringBuffer();
ClassLoader applicationClassLoader = VersionImpl.class.getClassLoader();
URL[] urls = ((URLClassLoader) applicationClassLoader).getURLs();
for (URL url : urls)
{
classpath.append(url.getFile()).append("\r\n");
}
return classpath.toString();
}
private static Version[] load()
{
Properties versionProps = new Properties();
final InputStream in = VersionImpl.class.getClassLoader().getResourceAsStream(VersionLoader.PROP_FILE_NAME);
try
{
if (in == null)
{
HornetQClientLogger.LOGGER.noVersionOnClasspath(getClasspathString());
throw new RuntimeException(VersionLoader.PROP_FILE_NAME + " is not available");
}
try
{
versionProps.load(in);
String versionName = versionProps.getProperty("hornetq.version.versionName");
int majorVersion = Integer.valueOf(versionProps.getProperty("hornetq.version.majorVersion"));
int minorVersion = Integer.valueOf(versionProps.getProperty("hornetq.version.minorVersion"));
int microVersion = Integer.valueOf(versionProps.getProperty("hornetq.version.microVersion"));
int[] incrementingVersions = parseCompatibleVersionList(versionProps.getProperty("hornetq.version.incrementingVersion"));
String versionSuffix = versionProps.getProperty("hornetq.version.versionSuffix");
int[] compatibleVersionArray = parseCompatibleVersionList(versionProps.getProperty("hornetq.version.compatibleVersionList"));
List definedVersions = new ArrayList(incrementingVersions.length);
for (int incrementingVersion : incrementingVersions)
{
definedVersions.add(new VersionImpl(versionName,
majorVersion,
minorVersion,
microVersion,
incrementingVersion,
versionSuffix,
compatibleVersionArray));
}
//We want the higher version to be the first
Collections.sort(definedVersions, new Comparator()
{
@Override
public int compare(Version version1, Version version2)
{
return version2.getIncrementingVersion() - version1.getIncrementingVersion();
}
});
return definedVersions.toArray(new Version[incrementingVersions.length]);
}
catch (IOException e)
{
// if we get here then the messaging hasn't been built properly and the version.properties is skewed in some
// way
throw new RuntimeException("unable to load " + VersionLoader.PROP_FILE_NAME, e);
}
}
finally
{
try
{
if (in != null)
in.close();
}
catch (Throwable ignored)
{
}
}
}
private static int[] parseCompatibleVersionList(String property) throws IOException
{
int[] verArray = new int[0];
StringTokenizer tokenizer = new StringTokenizer(property, ",");
while (tokenizer.hasMoreTokens())
{
int from = -1, to = -1;
String token = tokenizer.nextToken();
int cursor = 0;
char firstChar = token.charAt(0);
if (firstChar == '-')
{
// "-n" pattern
from = 0;
cursor++;
for (; cursor < token.length() && Character.isDigit(token.charAt(cursor)); cursor++)
{
// do nothing
}
if (cursor > 1)
{
to = Integer.parseInt(token.substring(1, cursor));
}
}
else if (Character.isDigit(firstChar))
{
for (; cursor < token.length() && Character.isDigit(token.charAt(cursor)); cursor++)
{
// do nothing
}
from = Integer.parseInt(token.substring(0, cursor));
if (cursor == token.length())
{
// just "n" pattern
to = from;
}
else if (token.charAt(cursor) == '-')
{
cursor++;
if (cursor == token.length())
{
// "n-" pattern
to = Integer.MAX_VALUE;
}
else
{
// "n-n" pattern
to = Integer.parseInt(token.substring(cursor));
}
}
}
if (from != -1 && to != -1)
{
// merge version array
int[] newArray = new int[verArray.length + to - from + 1];
System.arraycopy(verArray, 0, newArray, 0, verArray.length);
for (int i = 0; i < to - from + 1; i++)
{
newArray[verArray.length + i] = from + i;
}
verArray = newArray;
}
}
return verArray;
}
}