Examples with CoordinationException org.osgi.service.coordinator.CoordinationException used on opensource projects

Example 1 with CoordinationException

use of org.osgi.service.coordinator.CoordinationException 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 2 with CoordinationException

use of org.osgi.service.coordinator.CoordinationException in project aries by apache.

the class InstallAction method run.

@Override
public BasicSubsystem run() {
    // Doesn't appear to be any need of protecting against re-entry in the
    // case of installation.
    BasicSubsystem result = null;
    // Acquire the global write lock to prevent all other operations until
    // the installation is complete. There is no need to hold any other locks.
    Activator.getInstance().getLockingStrategy().writeLock();
    try {
        State state = parent.getState();
        if (State.INSTALLING.equals(state)) {
            throw new SubsystemException("A child subsystem may not be installed while the parent is in the INSTALLING state");
        }
        // Initialization of a null coordination must be privileged and,
        // therefore, occur in the run() method rather than in the constructor.
        Coordination coordination = Utils.createCoordination(parent);
        try {
            TargetRegion region = new TargetRegion(parent);
            SubsystemResource ssr = new SubsystemResource(location, content, parent, coordination);
            result = Activator.getInstance().getSubsystems().getSubsystemByLocation(location);
            if (result != null) {
                if (!region.contains(result))
                    throw new SubsystemException("Location already exists but existing subsystem is not part of target region: " + location);
                if (!(result.getSymbolicName().equals(ssr.getSubsystemManifest().getSubsystemSymbolicNameHeader().getSymbolicName()) && result.getVersion().equals(ssr.getSubsystemManifest().getSubsystemVersionHeader().getVersion()) && result.getType().equals(ssr.getSubsystemManifest().getSubsystemTypeHeader().getType())))
                    throw new SubsystemException("Location already exists but symbolic name, version, and type are not the same: " + location);
            } else {
                result = (BasicSubsystem) region.find(ssr.getSubsystemManifest().getSubsystemSymbolicNameHeader().getSymbolicName(), ssr.getSubsystemManifest().getSubsystemVersionHeader().getVersion());
                if (result != null) {
                    if (!result.getType().equals(ssr.getSubsystemManifest().getSubsystemTypeHeader().getType()))
                        throw new SubsystemException("Subsystem already exists in target region but has a different type: " + location);
                } else {
                    result = new BasicSubsystem(ssr, deploymentManifest);
                }
            }
            checkLifecyclePermission(result);
            return (BasicSubsystem) ResourceInstaller.newInstance(coordination, result, parent).install();
        } catch (Throwable t) {
            coordination.fail(t);
        } finally {
            try {
                coordination.end();
            } catch (CoordinationException e) {
                Throwable t = e.getCause();
                if (t instanceof SubsystemException)
                    throw (SubsystemException) t;
                if (t instanceof SecurityException)
                    throw (SecurityException) t;
                throw new SubsystemException(t);
            }
        }
    } finally {
        // Release the global write lock.
        Activator.getInstance().getLockingStrategy().writeUnlock();
    }
    return result;
}

Example 3 with CoordinationException

use of org.osgi.service.coordinator.CoordinationException in project aries by apache.

the class InterceptorTest method coordinationException.

private CoordinationException coordinationException(Throwable th) {
    Coordination coordination = EasyMock.createMock(Coordination.class);
    expect(coordination.getId()).andReturn(1l);
    expect(coordination.getName()).andReturn("Test");
    replay(coordination);
    CoordinationException cex = new CoordinationException("Simulating exception", coordination, CoordinationException.FAILED, th);
    return cex;
}