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Add a 'wires' command to allow easy investigation of bundle wires
Currently it is quite hard to find out if/why a certain bundle is using some other bundles or are used by others. This adds a new 'wires' command that when executed against a given bundle prints all wires that are used by the bundle and any wires it provides to other bundles. This results in a very powerful tool to analyze dependency problems and find out why a bundle is actually used.
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...les/org.eclipse.equinox.console/src/org/eclipse/equinox/console/commands/WireCommand.java
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| /******************************************************************************* | ||
| * Copyright (c) 2024 Christoph Läubrich and others. | ||
| * | ||
| * This program and the accompanying materials | ||
| * are made available under the terms of the Eclipse Public License 2.0 | ||
| * which accompanies this distribution, and is available at | ||
| * https://www.eclipse.org/legal/epl-2.0/ | ||
| * | ||
| * SPDX-License-Identifier: EPL-2.0 | ||
| * | ||
| * Contributors: | ||
| * Christoph Läubrich - initial API and implementation | ||
| *******************************************************************************/ | ||
| package org.eclipse.equinox.console.commands; | ||
|
|
||
| import java.io.PrintStream; | ||
| import java.util.Comparator; | ||
| import java.util.Dictionary; | ||
| import java.util.Hashtable; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.stream.Collectors; | ||
|
|
||
| import org.apache.felix.service.command.CommandProcessor; | ||
| import org.apache.felix.service.command.CommandSession; | ||
| import org.apache.felix.service.command.Descriptor; | ||
| import org.eclipse.osgi.util.ResourceFormatter; | ||
| import org.osgi.framework.Bundle; | ||
| import org.osgi.framework.BundleContext; | ||
| import org.osgi.framework.wiring.BundleRevision; | ||
| import org.osgi.framework.wiring.BundleWire; | ||
| import org.osgi.framework.wiring.BundleWiring; | ||
| import org.osgi.resource.Resource; | ||
|
|
||
| /** | ||
| * provides a command to print information about the wiring of a bundle | ||
| */ | ||
| public class WireCommand { | ||
|
|
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| private static final Comparator<BundleRevision> BUNDLE_REVISIONS_BY_NAME = Comparator.comparing( | ||
| BundleRevision::getSymbolicName, String.CASE_INSENSITIVE_ORDER); | ||
|
|
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| private BundleContext context; | ||
|
|
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| public WireCommand(BundleContext context) { | ||
| this.context = context; | ||
| } | ||
|
|
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| @Descriptor("Prints information about the wiring of a particular bundle") | ||
| public void wires(CommandSession session, long id) { | ||
| PrintStream console = session.getConsole(); | ||
| Bundle bundle = context.getBundle(id); | ||
| if (bundle == null) { | ||
| console.println(String.format("Bundle with id %d not found!", id)); | ||
| return; | ||
| } | ||
| BundleWiring bundleWiring = bundle.adapt(BundleWiring.class); | ||
| if (bundleWiring == null) { | ||
| console.println(String.format("Bundle with id %d has no wiring!", id)); | ||
| return; | ||
| } | ||
| console.println("Bundle " + bundle.getSymbolicName() + " " + bundle.getVersion() + ":"); | ||
| printWiring(console, bundleWiring); | ||
| } | ||
|
|
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| static void printWiring(PrintStream console, BundleWiring bundleWiring) { | ||
| BundleRevision resource = bundleWiring.getResource(); | ||
| Map<BundleRevision, List<BundleWire>> usedWires = | ||
| bundleWiring.getRequiredWires(null).stream() | ||
| .filter(bw -> !resource.equals(bw.getProvider())) | ||
| .collect(Collectors.groupingBy(BundleWire::getProvider)); | ||
| if (usedWires.isEmpty()) { | ||
| console.println("is not wired to any other bundle"); | ||
| } else { | ||
| console.println("is wired to:"); | ||
| usedWires.entrySet().stream().sorted(Comparator | ||
| .comparing(java.util.Map.Entry::getKey, BUNDLE_REVISIONS_BY_NAME)) | ||
| .forEach(bre -> { | ||
| console.println("\t - " + getResource(bre.getKey())); | ||
| for (BundleWire bw : bre.getValue()) { | ||
| console.println("\t - because of " | ||
| + ResourceFormatter.printRequirement(bw.getRequirement())); | ||
| } | ||
| }); | ||
|
|
||
| } | ||
| Map<BundleRevision, List<BundleWire>> consumersWires = | ||
| bundleWiring.getProvidedWires(null).stream() | ||
| .collect(Collectors.groupingBy(BundleWire::getRequirer)); | ||
| if (consumersWires.isEmpty()) { | ||
| console.println("and is not consumed by any bundle"); | ||
| } else { | ||
| console.println("and is consumed by:"); | ||
| consumersWires.entrySet().stream().sorted(Comparator | ||
| .comparing(java.util.Map.Entry::getKey, BUNDLE_REVISIONS_BY_NAME)) | ||
| .forEach(bre -> { | ||
| console.println("\t - " + getResource(bre.getKey())); | ||
| for (BundleWire bw : bre.getValue()) { | ||
| console.println("\t - because it " | ||
| + ResourceFormatter.printRequirement(bw.getRequirement())); | ||
| } | ||
| }); | ||
| } | ||
| } | ||
|
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| static String getResource(Resource resource) { | ||
| if (resource instanceof BundleRevision) { | ||
| BundleRevision bundleRevision = (BundleRevision) resource; | ||
| return bundleRevision.getSymbolicName() + " " + bundleRevision.getVersion(); | ||
| } | ||
| return String.valueOf(resource); | ||
| } | ||
|
|
||
| public void startService() { | ||
| Dictionary<String, Object> dict = new Hashtable<>(); | ||
| dict.put(CommandProcessor.COMMAND_SCOPE, "wiring"); | ||
| dict.put(CommandProcessor.COMMAND_FUNCTION, new String[] { "wires" }); | ||
| context.registerService(WireCommand.class, this, dict); | ||
| } | ||
|
|
||
| } |
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