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From aledsage <...@git.apache.org>
Subject [GitHub] incubator-brooklyn pull request: Initial OSGI work
Date Mon, 30 Jun 2014 22:21:48 GMT
Github user aledsage commented on a diff in the pull request:

    https://github.com/apache/incubator-brooklyn/pull/31#discussion_r14379322
  
    --- Diff: core/src/main/java/brooklyn/util/osgi/Osgis.java ---
    @@ -0,0 +1,151 @@
    +package brooklyn.util.osgi;
    +
    +import java.io.BufferedReader;
    +import java.io.InputStream;
    +import java.io.InputStreamReader;
    +import java.net.URL;
    +import java.util.List;
    +import java.util.Map;
    +
    +import org.apache.felix.framework.FrameworkFactory;
    +import org.osgi.framework.Bundle;
    +import org.osgi.framework.BundleException;
    +import org.osgi.framework.Constants;
    +import org.osgi.framework.Version;
    +import org.osgi.framework.launch.Framework;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +import brooklyn.util.ResourceUtils;
    +import brooklyn.util.collections.MutableList;
    +import brooklyn.util.collections.MutableMap;
    +import brooklyn.util.exceptions.Exceptions;
    +import brooklyn.util.guava.Maybe;
    +
    +import com.google.common.annotations.Beta;
    +import com.google.common.base.Joiner;
    +import com.google.common.base.Predicate;
    +import com.google.common.base.Predicates;
    +
    +/** 
    + * utilities for working with osgi.
    + * osgi support is in early days (June 2014) so this class is beta, subject to change,
    + * particularly in how framework is started and bundles installed.
    + * 
    + * @since 0.7.0  */
    +@Beta
    +public class Osgis {
    +
    +    private static final Logger LOG = LoggerFactory.getLogger(Osgis.class);
    +
    +    public static List<Bundle> getBundlesByName(Framework framework, String symbolicName,
Predicate<Version> versionMatcher) {
    +        List<Bundle> result = MutableList.of();
    +        for (Bundle b: framework.getBundleContext().getBundles()) {
    +            if (symbolicName.equals(b.getSymbolicName()) && versionMatcher.apply(b.getVersion()))
{
    +                result.add(b);
    +            }
    +        }
    +        return result;
    +    }
    +
    +    public static List<Bundle> getBundlesByName(Framework framework, String symbolicName)
{
    +        return getBundlesByName(framework, symbolicName, Predicates.<Version>alwaysTrue());
    +    }
    +
    +    /**
    +     * Tries to find a bundle in the given framework with name matching either `name'
or `name:version'.
    +     */
    +    public static Maybe<Bundle> getBundle(Framework framework, String symbolicNameOptionallyWithVersion)
{
    +        String[] parts = symbolicNameOptionallyWithVersion.split(":");
    +        Maybe<Bundle> result = Maybe.absent("No bundles matching "+symbolicNameOptionallyWithVersion);
    +        if (parts.length == 2) {
    +            result = getBundle(framework, parts[0], parts[1]);
    +        } else if (parts.length == 1) {
    +            List<Bundle> matches = getBundlesByName(framework, symbolicNameOptionallyWithVersion);
    +            if (!matches.isEmpty()) {
    +                result = Maybe.of(matches.iterator().next());
    --- End diff --
    
    Perhaps add a TODO about getting the latest stable version, rather than just first in
list?


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