Examples with Resource org.osgi.resource.Resource used on opensource projects

Example 11 with Resource

use of org.osgi.resource.Resource in project aries by apache.

the class StartAction method run.

@Override
public Object run() {
    // Protect against re-entry now that cycles are supported.
    if (!Activator.getInstance().getLockingStrategy().set(State.STARTING, target)) {
        return null;
    }
    try {
        AffectedResources affectedResources;
        // If necessary, install the dependencies.
        if (State.INSTALLING.equals(target.getState()) && !Utils.isProvisionDependenciesInstall(target)) {
            // Acquire the global write lock while installing dependencies.
            Activator.getInstance().getLockingStrategy().writeLock();
            try {
                // We are now protected against installs, starts, stops, and uninstalls.
                // We need a separate coordination when installing 
                // dependencies because cleaning up the temporary export 
                // sharing policies must be done while holding the write lock.
                Coordination c = Utils.createCoordination(target);
                try {
                    installDependencies(target, c);
                    // Associated subsystems must be computed after all dependencies 
                    // are installed because some of the dependencies may be 
                    // subsystems. This is safe to do while only holding the read
                    // lock since we know that nothing can be added or removed.
                    affectedResources = computeAffectedResources(target);
                    for (BasicSubsystem subsystem : affectedResources.subsystems()) {
                        if (State.INSTALLING.equals(subsystem.getState()) && !Utils.isProvisionDependenciesInstall(subsystem)) {
                            installDependencies(subsystem, c);
                        }
                    }
                    // Downgrade to the read lock in order to prevent 
                    // installs and uninstalls but allow starts and stops.
                    Activator.getInstance().getLockingStrategy().readLock();
                } catch (Throwable t) {
                    c.fail(t);
                } finally {
                    // This will clean up the temporary export sharing
                    // policies. Must be done while holding the write lock.
                    c.end();
                }
            } finally {
                // Release the global write lock as soon as possible.
                Activator.getInstance().getLockingStrategy().writeUnlock();
            }
        } else {
            // Acquire the read lock in order to prevent installs and
            // uninstalls but allow starts and stops.
            Activator.getInstance().getLockingStrategy().readLock();
        }
        try {
            // and uninstalls.
            if (Restriction.INSTALL_ONLY.equals(restriction)) {
                return null;
            }
            // Compute associated subsystems here in case (1) they weren't
            // computed previously while holding the write lock or (2) they
            // were computed previously and more were subsequently added. 
            // This is safe to do while only holding the read lock since we
            // know that nothing can be added or removed.
            affectedResources = computeAffectedResources(target);
            // Acquire the global mutual exclusion lock while acquiring the
            // state change locks of affected subsystems.
            Activator.getInstance().getLockingStrategy().lock();
            try {
                // We are now protected against cycles.
                // Acquire the state change locks of affected subsystems.
                Activator.getInstance().getLockingStrategy().lock(affectedResources.subsystems());
            } finally {
                // Release the global mutual exclusion lock as soon as possible.
                Activator.getInstance().getLockingStrategy().unlock();
            }
            Coordination coordination = this.coordination;
            try {
                coordination = createCoordination();
                // We are now protected against other starts and stops of the affected subsystems.
                if (!isTargetStartable(instigator, requestor, target)) {
                    return null;
                }
                // Resolve if necessary.
                if (State.INSTALLED.equals(target.getState()))
                    resolve(instigator, target, target, coordination, affectedResources.subsystems());
                if (Restriction.RESOLVE_ONLY.equals(restriction))
                    return null;
                target.setState(State.STARTING);
                // Be sure to set the state back to RESOLVED if starting fails.
                coordination.addParticipant(new Participant() {

                    @Override
                    public void ended(Coordination coordination) throws Exception {
                    // Nothing.
                    }

                    @Override
                    public void failed(Coordination coordination) throws Exception {
                        target.setState(State.RESOLVED);
                    }
                });
                SubsystemContentHeader header = target.getSubsystemManifest().getSubsystemContentHeader();
                if (header != null)
                    Collections.sort(affectedResources.resources(), new StartResourceComparator(header));
                for (Resource resource : affectedResources.resources()) startResource(resource, coordination);
                target.setState(State.ACTIVE);
            } catch (Throwable t) {
                // We catch exceptions and fail the coordination here to
                // ensure we are still holding the state change locks when
                // the participant sets the state to RESOLVED.
                coordination.fail(t);
            } finally {
                try {
                    // of this start action.
                    if (coordination.getName().equals(Utils.computeCoordinationName(target))) {
                        coordination.end();
                    }
                } finally {
                    // Release the state change locks of affected subsystems.
                    Activator.getInstance().getLockingStrategy().unlock(affectedResources.subsystems());
                }
            }
        } finally {
            // Release the read lock.
            Activator.getInstance().getLockingStrategy().readUnlock();
        }
    } catch (CoordinationException e) {
        Throwable t = e.getCause();
        if (t == null) {
            throw new SubsystemException(e);
        }
        if (t instanceof SecurityException) {
            throw (SecurityException) t;
        }
        if (t instanceof SubsystemException) {
            throw (SubsystemException) t;
        }
        throw new SubsystemException(t);
    } finally {
        // Protection against re-entry no longer required.
        Activator.getInstance().getLockingStrategy().unset(State.STARTING, target);
    }
    return null;
}

Example 12 with Resource

use of org.osgi.resource.Resource in project aries by apache.

the class ResolveContext method findProviders.

@Override
public List<Capability> findProviders(Requirement requirement) {
    ArrayList<Capability> capabilities = new ArrayList<Capability>();
    Resource resource = requirement.getResource();
    if (isResolved(resource) && Utils.isEffectiveResolve(requirement)) {
        processAlreadyResolvedResource(resource, requirement, capabilities);
    } else {
        installDependenciesOfRequirerIfNecessary(requirement);
        processNewlyResolvedResource(resource, requirement, capabilities);
    }
    capabilities.trimToSize();
    return capabilities;
}

Example 13 with Resource

use of org.osgi.resource.Resource in project aries by apache.

the class RawSubsystemResource method createFakeResource.

private static Resource createFakeResource(SubsystemManifest manifest) {
    Header<?> importServiceHeader = manifest.getHeaders().get(APPLICATION_IMPORT_SERVICE_HEADER);
    if (importServiceHeader == null) {
        return null;
    }
    List<Capability> modifiableCaps = new ArrayList<Capability>();
    final List<Capability> fakeCapabilities = Collections.unmodifiableList(modifiableCaps);
    Resource fakeResource = new Resource() {

        @Override
        public List<Capability> getCapabilities(String namespace) {
            if (namespace == null) {
                return fakeCapabilities;
            }
            List<Capability> results = new ArrayList<Capability>();
            for (Capability capability : fakeCapabilities) {
                if (namespace.equals(capability.getNamespace())) {
                    results.add(capability);
                }
            }
            return results;
        }

        @Override
        public List<Requirement> getRequirements(String namespace) {
            return Collections.emptyList();
        }
    };
    modifiableCaps.add(new OsgiIdentityCapability(fakeResource, Constants.ResourceTypeSynthesized, new Version(1, 0, 0), Constants.ResourceTypeSynthesized));
    Map<String, Map<String, String>> serviceImports = ManifestHeaderProcessor.parseImportString(importServiceHeader.getValue());
    for (Entry<String, Map<String, String>> serviceImport : serviceImports.entrySet()) {
        Collection<String> objectClasses = new ArrayList<String>(Arrays.asList(serviceImport.getKey()));
        String filter = serviceImport.getValue().get(IdentityNamespace.REQUIREMENT_FILTER_DIRECTIVE);
        BasicCapability.Builder capBuilder = new BasicCapability.Builder();
        capBuilder.namespace(ServiceNamespace.SERVICE_NAMESPACE);
        capBuilder.attribute(ServiceNamespace.CAPABILITY_OBJECTCLASS_ATTRIBUTE, objectClasses);
        if (filter != null)
            capBuilder.attributes(new HashMap<String, Object>(SimpleFilter.attributes(filter)));
        capBuilder.attribute("service.imported", "");
        capBuilder.resource(fakeResource);
        modifiableCaps.add(capBuilder.build());
    }
    return fakeResource;
}

Example 14 with Resource

use of org.osgi.resource.Resource in project aries by apache.

the class RawSubsystemResource method computeRequirements.

private List<Requirement> computeRequirements(SubsystemManifest manifest) throws ResolutionException {
    if (isComposite(manifest)) {
        // Composites determine their own requirements.
        return manifest.toRequirements(this);
    }
    // Gather up all of the content resources for the subsystem.
    SubsystemContentHeader header = manifest.getSubsystemContentHeader();
    if (header == null) {
        // Empty subsystems (i.e. subsystems with no content) are allowed.
        return Collections.emptyList();
    }
    List<Requirement> requirements = header.toRequirements(this);
    List<Resource> resources = new ArrayList<Resource>(requirements.size());
    // TODO Do we need the system repository in here (e.g., for features)?
    // What about the preferred provider repository?
    // Search the local repository and service repositories for content.
    RepositoryServiceRepository serviceRepo = new RepositoryServiceRepository();
    // TODO Should we search the service repositories first, the assumption
    // being they will contain more current content than the subsystem
    // archive?
    CompositeRepository compositeRepo = new CompositeRepository(localRepository, serviceRepo);
    for (Requirement requirement : requirements) {
        Collection<Capability> capabilities = compositeRepo.findProviders(requirement);
        if (!capabilities.isEmpty()) {
            resources.add(capabilities.iterator().next().getResource());
        }
    }
    if (fakeImportServiceResource != null) {
        // Add the fake resource so the dependency calculator knows not to
        // return service requirements that are included in 
        // Application-ImportService.
        resources.add(fakeImportServiceResource);
    }
    // dependencies not satisfied by the content resources themselves.
    return new DependencyCalculator(resources).calculateDependencies();
}

Example 15 with Resource

use of org.osgi.resource.Resource in project aries by apache.

the class RawSubsystemResource method computeResources.

private Collection<Resource> computeResources(IDirectory directory, SubsystemManifest manifest) throws IOException, URISyntaxException, ResolutionException {
    List<IFile> files = directory.listFiles();
    if (files.isEmpty())
        return Collections.emptyList();
    ArrayList<Resource> result = new ArrayList<Resource>(files.size());
    for (IFile file : directory.listFiles()) {
        if (file.isFile()) {
            addResource(file, file.convertNested(), manifest, result);
        } else if (!file.getName().endsWith("OSGI-INF")) {
            addResource(file, file.convert(), manifest, result);
        }
    }
    result.trimToSize();
    return result;
}